NAME
Config - access Perl configuration information
SYNOPSIS
use Config; if ($Config{usethreads}) { print "has thread support\n" }
use Config qw(myconfig config_sh config_vars config_re);
print myconfig();
print config_sh();
print config_re();
config_vars(qw(osname archname));
DESCRIPTION
The Config module contains all the information that was available to
the Configure
program at Perl build time (over 900 values).
Shell variables from the config.sh file (written by Configure) are
stored in the readonly-variable %Config
, indexed by their names.
Values stored in config.sh as 'undef' are returned as undefined
values. The perl exists function can be used to check if a
named variable exists.
- myconfig()
Returns a textual summary of the major perl configuration values. See also
-Vin "Switches" in perlrun. - config_sh()
Returns the entire perl configuration information in the form of the original config.sh shell variable assignment script.
- config_re($regex)
Like config_sh() but returns, as a list, only the config entries who's names match the $regex.
- config_vars(@names)
Prints to STDOUT the values of the named configuration variable. Each is printed on a separate line in the form:
name='value';
Names which are unknown are output as
name='UNKNOWN';. See also-V:namein "Switches" in perlrun.
EXAMPLE
Here's a more sophisticated example of using %Config:
use Config; use strict;
my %sig_num; my @sig_name; unless($Config{sig_name} && $Config{sig_num}) { die "No sigs?"; } else { my @names = split ' ', $Config{sig_name}; @sig_num{@names} = split ' ', $Config{sig_num}; foreach (@names) { $sig_name[$sig_num{$_}] ||= $_; } }
print "signal #17 = $sig_name[17]\n"; if ($sig_num{ALRM}) { print "SIGALRM is $sig_num{ALRM}\n"; }
WARNING
Because this information is not stored within the perl executable itself it is possible (but unlikely) that the information does not relate to the actual perl binary which is being used to access it.
The Config module is installed into the architecture and version specific library directory ($Config{installarchlib}) and it checks the perl version number when loaded.
The values stored in config.sh may be either single-quoted or
double-quoted. Double-quoted strings are handy for those cases where you
need to include escape sequences in the strings. To avoid runtime variable
interpolation, any $
and @
characters are replaced by \$
and
\@
, respectively. This isn't foolproof, of course, so don't embed \$
or \@
in double-quoted strings unless you're willing to deal with the
consequences. (The slashes will end up escaped and the $
or @
will
trigger variable interpolation)
GLOSSARY
Most Config
variables are determined by the Configure
script
on platforms supported by it (which is most UNIX platforms). Some
platforms have custom-made Config
variables, and may thus not have
some of the variables described below, or may have extraneous variables
specific to that particular port. See the port specific documentation
in such cases.
_
_aFrom Unix.U:
This variable defines the extension used for ordinary library files. For unix, it is .a. The . is included. Other possible values include .lib.
_exeFrom Unix.U:
This variable defines the extension used for executable files.
DJGPP, Cygwin and OS/2 use .exe. StratusVOSuses .pm. On operating systems which do not require a specific extension for executable files, this variable is empty._oFrom Unix.U:
This variable defines the extension used for object files. For unix, it is .o. The . is included. Other possible values include .obj.
a
afsFrom afs.U:
This variable is set to
trueifAFS(Andrew File System) is used on the system,falseotherwise. It is possible to override this with a hint value or command line option, but you'd better know what you are doing.afsrootFrom afs.U:
This variable is by default set to /afs. In the unlikely case this is not the correct root, it is possible to override this with a hint value or command line option. This will be used in subsequent tests for AFSness in the Perl configure and test process.
alignbytesFrom alignbytes.U:
This variable holds the number of bytes required to align a double-- or a long double when applicable. Usual values are 2, 4 and 8. The default is eight, for safety.
ansi2knrFrom ansi2knr.U:
This variable is set if the user needs to run ansi2knr. Currently, this is not supported, so we just abort.
aphostnameFrom d_gethname.U:
This variable contains the command which can be used to compute the host name. The command is fully qualified by its absolute path, to make it safe when used by a process with super-user privileges.
api_revisionFrom patchlevel.U:
The three variables, api_revision, api_version, and api_subversion, specify the version of the oldest perl binary compatible with the present perl. In a full version string such as 5.6.1, api_revision is the
5. Prior to 5.5.640, the format was a floating point number, like 5.00563.perl.c:incpush() and lib/lib.pm will automatically search in $sitelib/.. for older directories back to the limit specified by these api_ variables. This is only useful if you have a perl library directory tree structured like the default one. See
INSTALLfor how this works. The versioned site_perl directory was introduced in 5.005, so that is the lowest possible value. The version list appropriate for the current system is determined in inc_version_list.U.XXXTo do: Since compatibility can depend on compile time options (such as bincompat, longlong, etc.) it should (perhaps) be set by Configure, but currently it isn't. Currently, we read a hard-wired value from patchlevel.h. Perhaps what we ought to do is take the hard-wired value from patchlevel.h but then modify it if the current Configure options warrant. patchlevel.h then would use an #ifdef guard.api_subversionFrom patchlevel.U:
The three variables, api_revision, api_version, and api_subversion, specify the version of the oldest perl binary compatible with the present perl. In a full version string such as 5.6.1, api_subversion is the
1. See api_revision for full details.api_versionFrom patchlevel.U:
The three variables, api_revision, api_version, and api_subversion, specify the version of the oldest perl binary compatible with the present perl. In a full version string such as 5.6.1, api_version is the
6. See api_revision for full details. As a special case, 5.5.0 is rendered in the old-style as 5.005. (In the 5.005_0x maintenance series, this was the only versioned directory in $sitelib.)api_versionstringFrom patchlevel.U:
This variable combines api_revision, api_version, and api_subversion in a format such as 5.6.1 (or 5_6_1) suitable for use as a directory name. This is filesystem dependent.
arFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the ar program. After Configure runs, the value is reset to a plain
arand is not useful.archlibFrom archlib.U:
This variable holds the name of the directory in which the user wants to put architecture-dependent public library files for $package. It is most often a local directory such as /usr/local/lib. Programs using this variable must be prepared to deal with filename expansion.
archlibexpFrom archlib.U:
This variable is the same as the archlib variable, but is filename expanded at configuration time, for convenient use.
archnameFrom archname.U:
This variable is a short name to characterize the current architecture. It is used mainly to construct the default archlib.
archname64From use64bits.U:
This variable is used for the 64-bitness part of $archname.
archobjsFrom Unix.U:
This variable defines any additional objects that must be linked in with the program on this architecture. On unix, it is usually empty. It is typically used to include emulations of unix calls or other facilities. For perl on OS/2, for example, this would include os2/os2.obj.
asctime_r_protoFrom d_asctime_r.U:
This variable encodes the prototype of asctime_r. It is zero if d_asctime_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_asctime_r is defined.awkFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the awk program. After Configure runs, the value is reset to a plain
awkand is not useful.
b
baserevFrom baserev.U:
The base revision level of this package, from the .package file.
bashFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
binFrom bin.U:
This variable holds the name of the directory in which the user wants to put publicly executable images for the package in question. It is most often a local directory such as /usr/local/bin. Programs using this variable must be prepared to deal with ~name substitution.
binexpFrom bin.U:
This is the same as the bin variable, but is filename expanded at configuration time, for use in your makefiles.
bisonFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the bison program. After Configure runs, the value is reset to a plain
bisonand is not useful.byaccFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the byacc program. After Configure runs, the value is reset to a plain
byaccand is not useful.byteorderFrom byteorder.U:
This variable holds the byte order in a
UV. In the following, larger digits indicate more significance. The variable byteorder is either 4321 on a big-endian machine, or 1234 on a little-endian, or 87654321 on a Cray ... or 3412 with weird order !
c
cFrom n.U:
This variable contains the \c string if that is what causes the echo command to suppress newline. Otherwise it is null. Correct usage is $echo $n "prompt for a question: $c".
castflagsFrom d_castneg.U:
This variable contains a flag that precise difficulties the compiler has casting odd floating values to unsigned long: 0 = ok 1 = couldn't cast < 0 2 = couldn't cast >= 0x80000000 4 = couldn't cast in argument expression list
catFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the cat program. After Configure runs, the value is reset to a plain
catand is not useful.ccFrom cc.U:
This variable holds the name of a command to execute a C compiler which can resolve multiple global references that happen to have the same name. Usual values are
ccandgcc. FerventANSIcompilers may be calledc89.AIXhas xlc.cccdlflagsFrom dlsrc.U:
This variable contains any special flags that might need to be passed with
cc -cto compile modules to be used to create a shared library that will be used for dynamic loading. For hpux, this should be +z. It is up to the makefile to use it.ccdlflagsFrom dlsrc.U:
This variable contains any special flags that might need to be passed to cc to link with a shared library for dynamic loading. It is up to the makefile to use it. For sunos 4.1, it should be empty.
ccflagsFrom ccflags.U:
This variable contains any additional C compiler flags desired by the user. It is up to the Makefile to use this.
ccflags_uselargefilesFrom uselfs.U:
This variable contains the compiler flags needed by large file builds and added to ccflags by hints files.
ccnameFrom Checkcc.U:
This can set either by hints files or by Configure. If using gcc, this is gcc, and if not, usually equal to cc, unimpressive, no? Some platforms, however, make good use of this by storing the flavor of the C compiler being used here. For example if using the Sun WorkShop suite, ccname will be
workshop.ccsymbolsFrom Cppsym.U:
The variable contains the symbols defined by the C compiler alone. The symbols defined by cpp or by cc when it calls cpp are not in this list, see cppsymbols and cppccsymbols. The list is a space-separated list of symbol=value tokens.
ccversionFrom Checkcc.U:
This can set either by hints files or by Configure. If using a (non-gcc) vendor cc, this variable may contain a version for the compiler.
cf_byFrom cf_who.U:
Login name of the person who ran the Configure script and answered the questions. This is used to tag both config.sh and config_h.SH.
cf_emailFrom cf_email.U:
Electronic mail address of the person who ran Configure. This can be used by units that require the user's e-mail, like MailList.U.
cf_timeFrom cf_who.U:
Holds the output of the
datecommand when the configuration file was produced. This is used to tag both config.sh and config_h.SH.chgrpFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
chmodFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the chmod program. After Configure runs, the value is reset to a plain
chmodand is not useful.chownFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
clocktypeFrom d_times.U:
This variable holds the type returned by times(). It can be long, or clock_t on
BSDsites (in which case <sys/types.h> should be included).commFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the comm program. After Configure runs, the value is reset to a plain
command is not useful.compressFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
containsFrom contains.U:
This variable holds the command to do a grep with a proper return status. On most sane systems it is simply
grep. On insane systems it is a grep followed by a cat followed by a test. This variable is primarily for the use of other Configure units.cpFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the cp program. After Configure runs, the value is reset to a plain
cpand is not useful.cpioFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
cppFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the cpp program. After Configure runs, the value is reset to a plain
cppand is not useful.cpp_stuffFrom cpp_stuff.U:
This variable contains an identification of the concatenation mechanism used by the C preprocessor.
cppccsymbolsFrom Cppsym.U:
The variable contains the symbols defined by the C compiler when it calls cpp. The symbols defined by the cc alone or cpp alone are not in this list, see ccsymbols and cppsymbols. The list is a space-separated list of symbol=value tokens.
cppflagsFrom ccflags.U:
This variable holds the flags that will be passed to the C pre- processor. It is up to the Makefile to use it.
cpplastFrom cppstdin.U:
This variable has the same functionality as cppminus, only it applies to cpprun and not cppstdin.
cppminusFrom cppstdin.U:
This variable contains the second part of the string which will invoke the C preprocessor on the standard input and produce to standard output. This variable will have the value
-if cppstdin needs a minus to specify standard input, otherwise the value is "".cpprunFrom cppstdin.U:
This variable contains the command which will invoke a C preprocessor on standard input and put the output to stdout. It is guaranteed not to be a wrapper and may be a null string if no preprocessor can be made directly available. This preprocessor might be different from the one used by the C compiler. Don't forget to append cpplast after the preprocessor options.
cppstdinFrom cppstdin.U:
This variable contains the command which will invoke the C preprocessor on standard input and put the output to stdout. It is primarily used by other Configure units that ask about preprocessor symbols.
cppsymbolsFrom Cppsym.U:
The variable contains the symbols defined by the C preprocessor alone. The symbols defined by cc or by cc when it calls cpp are not in this list, see ccsymbols and cppccsymbols. The list is a space-separated list of symbol=value tokens.
crypt_r_protoFrom d_crypt_r.U:
This variable encodes the prototype of crypt_r. It is zero if d_crypt_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_crypt_r is defined.cryptlibFrom d_crypt.U:
This variable holds -lcrypt or the path to a libcrypt.a archive if the crypt() function is not defined in the standard C library. It is up to the Makefile to use this.
cshFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the csh program. After Configure runs, the value is reset to a plain
cshand is not useful.ctermid_r_protoFrom d_ctermid_r.U:
This variable encodes the prototype of ctermid_r. It is zero if d_ctermid_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_ctermid_r is defined.ctime_r_protoFrom d_ctime_r.U:
This variable encodes the prototype of ctime_r. It is zero if d_ctime_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_ctime_r is defined.
d
d__fwalkFrom d__fwalk.U:
This variable conditionally defines
HAS__FWALKif _fwalk() is available to apply a function to all the file handles.d_accessFrom d_access.U:
This variable conditionally defines
HAS_ACCESSif the access() system call is available to check for access permissions using real IDs.d_accessxFrom d_accessx.U:
This variable conditionally defines the
HAS_ACCESSXsymbol, which indicates to the C program that the accessx() routine is available.d_aintlFrom d_aintl.U:
This variable conditionally defines the
HAS_AINTLsymbol, which indicates to the C program that the aintl() routine is available. If copysignl is also present we can emulate modfl.d_alarmFrom d_alarm.U:
This variable conditionally defines the
HAS_ALARMsymbol, which indicates to the C program that the alarm() routine is available.d_archlibFrom archlib.U:
This variable conditionally defines
ARCHLIBto hold the pathname of architecture-dependent library files for $package. If $archlib is the same as $privlib, then this is set to undef.d_asctime_rFrom d_asctime_r.U:
This variable conditionally defines the
HAS_ASCTIME_Rsymbol, which indicates to the C program that the asctime_r() routine is available.d_atolfFrom atolf.U:
This variable conditionally defines the
HAS_ATOLFsymbol, which indicates to the C program that the atolf() routine is available.d_atollFrom atoll.U:
This variable conditionally defines the
HAS_ATOLLsymbol, which indicates to the C program that the atoll() routine is available.d_attribute_formatFrom d_attribut.U:
This variable conditionally defines
HASATTRIBUTE_FORMAT, which indicates the C compiler can check for printf-like formats.d_attribute_mallocFrom d_attribut.U:
This variable conditionally defines
HASATTRIBUTE_MALLOC, which indicates the C compiler can understand functions as having malloc-like semantics.d_attribute_nonnullFrom d_attribut.U:
This variable conditionally defines
HASATTRIBUTE_NONNULL, which indicates that the C compiler can know that certain arguments must not beNULL, and will check accordingly at compile time.d_attribute_noreturnFrom d_attribut.U:
This variable conditionally defines
HASATTRIBUTE_NORETURN, which indicates that the C compiler can know that certain functions are guaranteed never to return.d_attribute_pureFrom d_attribut.U:
This variable conditionally defines
HASATTRIBUTE_PURE, which indicates that the C compiler can know that certain functions arepurefunctions, meaning that they have no side effects, and only rely on function input and/or global data for their results.d_attribute_unusedFrom d_attribut.U:
This variable conditionally defines
HASATTRIBUTE_UNUSED, which indicates that the C compiler can know that certain variables and arguments may not always be used, and to not throw warnings if they don't get used.d_attribute_warn_unused_resultFrom d_attribut.U:
This variable conditionally defines
HASATTRIBUTE_WARN_UNUSED_RESULT, which indicates that the C compiler can know that certain functions have a return values that must not be ignored, such as malloc() or open().d_bcmpFrom d_bcmp.U:
This variable conditionally defines the
HAS_BCMPsymbol if the bcmp() routine is available to compare strings.d_bcopyFrom d_bcopy.U:
This variable conditionally defines the
HAS_BCOPYsymbol if the bcopy() routine is available to copy strings.d_bsdFrom Guess.U:
This symbol conditionally defines the symbol
BSDwhen running on aBSDsystem.d_bsdgetpgrpFrom d_getpgrp.U:
This variable conditionally defines
USE_BSD_GETPGRPif getpgrp needs one arguments whereasUSGone needs none.d_bsdsetpgrpFrom d_setpgrp.U:
This variable conditionally defines
USE_BSD_SETPGRPif setpgrp needs two arguments whereasUSGone needs none. See also d_setpgid for aPOSIXinterface.d_builtin_choose_exprFrom d_builtin.U:
This conditionally defines
HAS_BUILTIN_CHOOSE_EXPR, which indicates that the compiler supports __builtin_choose_expr(x,y,z). This built-in function is analogous to thex?y:zoperator in C, except that the expression returned has its type unaltered by promotion rules. Also, the built-in function does not evaluate the expression that was not chosen.d_builtin_expectFrom d_builtin.U:
This conditionally defines
HAS_BUILTIN_EXPECT, which indicates that the compiler supports __builtin_expect(exp,c). You may use __builtin_expect to provide the compiler with branch prediction information.d_bzeroFrom d_bzero.U:
This variable conditionally defines the
HAS_BZEROsymbol if the bzero() routine is available to set memory to 0.d_c99_variadic_macrosFrom d_c99_variadic.U:
This variable conditionally defines the HAS_C99_VARIADIC_MACROS symbol, which indicates to the C program that C99 variadic macros are available.
d_casti32From d_casti32.U:
This variable conditionally defines CASTI32, which indicates whether the C compiler can cast large floats to 32-bit ints.
d_castnegFrom d_castneg.U:
This variable conditionally defines
CASTNEG, which indicates wether the C compiler can cast negative float to unsigned.d_charvsprFrom d_vprintf.U:
This variable conditionally defines
CHARVSPRINTFif this system has vsprintf returning type (char*). The trend seems to be to declare it as "int vsprintf()".d_chownFrom d_chown.U:
This variable conditionally defines the
HAS_CHOWNsymbol, which indicates to the C program that the chown() routine is available.d_chrootFrom d_chroot.U:
This variable conditionally defines the
HAS_CHROOTsymbol, which indicates to the C program that the chroot() routine is available.d_chsizeFrom d_chsize.U:
This variable conditionally defines the
CHSIZEsymbol, which indicates to the C program that the chsize() routine is available to truncate files. You might need a -lx to get this routine.d_classFrom d_class.U:
This variable conditionally defines the
HAS_CLASSsymbol, which indicates to the C program that the class() routine is available.d_clearenvFrom d_clearenv.U:
This variable conditionally defines the
HAS_CLEARENVsymbol, which indicates to the C program that the clearenv () routine is available.d_closedirFrom d_closedir.U:
This variable conditionally defines
HAS_CLOSEDIRif closedir() is available.d_cmsghdr_sFrom d_cmsghdr_s.U:
This variable conditionally defines the
HAS_STRUCT_CMSGHDRsymbol, which indicates that the struct cmsghdr is supported.d_constFrom d_const.U:
This variable conditionally defines the
HASCONSTsymbol, which indicates to the C program that this C compiler knows about the const type.d_copysignlFrom d_copysignl.U:
This variable conditionally defines the
HAS_COPYSIGNLsymbol, which indicates to the C program that the copysignl() routine is available. If aintl is also present we can emulate modfl.d_cplusplusFrom d_cplusplus.U:
This variable conditionally defines the
USE_CPLUSPLUSsymbol, which indicates that a C++ compiler was used to compiled Perl and will be used to compile extensions.d_cryptFrom d_crypt.U:
This variable conditionally defines the
CRYPTsymbol, which indicates to the C program that the crypt() routine is available to encrypt passwords and the like.d_crypt_rFrom d_crypt_r.U:
This variable conditionally defines the
HAS_CRYPT_Rsymbol, which indicates to the C program that the crypt_r() routine is available.d_cshFrom d_csh.U:
This variable conditionally defines the
CSHsymbol, which indicates to the C program that the C-shell exists.d_ctermidFrom d_ctermid.U:
This variable conditionally defines
CTERMIDif ctermid() is available to generate filename for terminal.d_ctermid_rFrom d_ctermid_r.U:
This variable conditionally defines the
HAS_CTERMID_Rsymbol, which indicates to the C program that the ctermid_r() routine is available.d_ctime_rFrom d_ctime_r.U:
This variable conditionally defines the
HAS_CTIME_Rsymbol, which indicates to the C program that the ctime_r() routine is available.d_cuseridFrom d_cuserid.U:
This variable conditionally defines the
HAS_CUSERIDsymbol, which indicates to the C program that the cuserid() routine is available to get character login names.d_dbl_digFrom d_dbl_dig.U:
This variable conditionally defines d_dbl_dig if this system's header files provide
DBL_DIG, which is the number of significant digits in a double precision number.d_dbminitprotoFrom d_dbminitproto.U:
This variable conditionally defines the
HAS_DBMINIT_PROTOsymbol, which indicates to the C program that the system provides a prototype for the dbminit() function. Otherwise, it is up to the program to supply one.d_difftimeFrom d_difftime.U:
This variable conditionally defines the
HAS_DIFFTIMEsymbol, which indicates to the C program that the difftime() routine is available.d_dir_dd_fdFrom d_dir_dd_fd.U:
This variable conditionally defines the
HAS_DIR_DD_FDsymbol, which indicates that theDIRdirectory stream type contains a member variable called dd_fd.d_dirfdFrom d_dirfd.U:
This variable conditionally defines the
HAS_DIRFDconstant, which indicates to the C program that dirfd() is available to return the file descriptor of a directory stream.d_dirnamlenFrom i_dirent.U:
This variable conditionally defines
DIRNAMLEN, which indicates to the C program that the length of directory entry names is provided by a d_namelen field.d_dlerrorFrom d_dlerror.U:
This variable conditionally defines the
HAS_DLERRORsymbol, which indicates to the C program that the dlerror() routine is available.d_dlopenFrom d_dlopen.U:
This variable conditionally defines the
HAS_DLOPENsymbol, which indicates to the C program that the dlopen() routine is available.d_dlsymunFrom d_dlsymun.U:
This variable conditionally defines
DLSYM_NEEDS_UNDERSCORE, which indicates that we need to prepend an underscore to the symbol name before calling dlsym().d_dosuidFrom d_dosuid.U:
This variable conditionally defines the symbol
DOSUID, which tells the C program that it should insert setuid emulation code on hosts which have setuid #! scripts disabled.d_drand48_rFrom d_drand48_r.U:
This variable conditionally defines the HAS_DRAND48_R symbol, which indicates to the C program that the drand48_r() routine is available.
d_drand48protoFrom d_drand48proto.U:
This variable conditionally defines the HAS_DRAND48_PROTO symbol, which indicates to the C program that the system provides a prototype for the drand48() function. Otherwise, it is up to the program to supply one.
d_dup2From d_dup2.U:
This variable conditionally defines HAS_DUP2 if dup2() is available to duplicate file descriptors.
d_eaccessFrom d_eaccess.U:
This variable conditionally defines the
HAS_EACCESSsymbol, which indicates to the C program that the eaccess() routine is available.d_endgrentFrom d_endgrent.U:
This variable conditionally defines the
HAS_ENDGRENTsymbol, which indicates to the C program that the endgrent() routine is available for sequential access of the group database.d_endgrent_rFrom d_endgrent_r.U:
This variable conditionally defines the
HAS_ENDGRENT_Rsymbol, which indicates to the C program that the endgrent_r() routine is available.d_endhentFrom d_endhent.U:
This variable conditionally defines
HAS_ENDHOSTENTif endhostent() is available to close whatever was being used for host queries.d_endhostent_rFrom d_endhostent_r.U:
This variable conditionally defines the
HAS_ENDHOSTENT_Rsymbol, which indicates to the C program that the endhostent_r() routine is available.d_endnentFrom d_endnent.U:
This variable conditionally defines
HAS_ENDNETENTif endnetent() is available to close whatever was being used for network queries.d_endnetent_rFrom d_endnetent_r.U:
This variable conditionally defines the
HAS_ENDNETENT_Rsymbol, which indicates to the C program that the endnetent_r() routine is available.d_endpentFrom d_endpent.U:
This variable conditionally defines
HAS_ENDPROTOENTif endprotoent() is available to close whatever was being used for protocol queries.d_endprotoent_rFrom d_endprotoent_r.U:
This variable conditionally defines the
HAS_ENDPROTOENT_Rsymbol, which indicates to the C program that the endprotoent_r() routine is available.d_endpwentFrom d_endpwent.U:
This variable conditionally defines the
HAS_ENDPWENTsymbol, which indicates to the C program that the endpwent() routine is available for sequential access of the passwd database.d_endpwent_rFrom d_endpwent_r.U:
This variable conditionally defines the
HAS_ENDPWENT_Rsymbol, which indicates to the C program that the endpwent_r() routine is available.d_endsentFrom d_endsent.U:
This variable conditionally defines
HAS_ENDSERVENTif endservent() is available to close whatever was being used for service queries.d_endservent_rFrom d_endservent_r.U:
This variable conditionally defines the
HAS_ENDSERVENT_Rsymbol, which indicates to the C program that the endservent_r() routine is available.d_eofnblkFrom nblock_io.U:
This variable conditionally defines
EOF_NONBLOCKifEOFcan be seen when reading from a non-blocking I/O source.d_euniceFrom Guess.U:
This variable conditionally defines the symbols
EUNICEandVAX, which alerts the C program that it must deal with ideosyncracies ofVMS.d_faststdioFrom d_faststdio.U:
This variable conditionally defines the
HAS_FAST_STDIOsymbol, which indicates to the C program that the "fast stdio" is available to manipulate the stdio buffers directly.d_fchdirFrom d_fchdir.U:
This variable conditionally defines the
HAS_FCHDIRsymbol, which indicates to the C program that the fchdir() routine is available.d_fchmodFrom d_fchmod.U:
This variable conditionally defines the
HAS_FCHMODsymbol, which indicates to the C program that the fchmod() routine is available to change mode of opened files.d_fchownFrom d_fchown.U:
This variable conditionally defines the
HAS_FCHOWNsymbol, which indicates to the C program that the fchown() routine is available to change ownership of opened files.d_fcntlFrom d_fcntl.U:
This variable conditionally defines the
HAS_FCNTLsymbol, and indicates whether the fcntl() function existsd_fcntl_can_lockFrom d_fcntl_can_lock.U:
This variable conditionally defines the
FCNTL_CAN_LOCKsymbol and indicates whether file locking with fcntl() works.d_fd_macrosFrom d_fd_set.U:
This variable contains the eventual value of the
HAS_FD_MACROSsymbol, which indicates if your C compiler knows about the macros which manipulate an fd_set.d_fd_setFrom d_fd_set.U:
This variable contains the eventual value of the
HAS_FD_SETsymbol, which indicates if your C compiler knows about the fd_set typedef.d_fds_bitsFrom d_fd_set.U:
This variable contains the eventual value of the
HAS_FDS_BITSsymbol, which indicates if your fd_set typedef contains the fds_bits member. If you have an fd_set typedef, but the dweebs who installed it did a half-fast job and neglected to provide the macros to manipulate an fd_set,HAS_FDS_BITSwill let us know how to fix the gaffe.d_fgetposFrom d_fgetpos.U:
This variable conditionally defines
HAS_FGETPOSif fgetpos() is available to get the file position indicator.d_finiteFrom d_finite.U:
This variable conditionally defines the
HAS_FINITEsymbol, which indicates to the C program that the finite() routine is available.d_finitelFrom d_finitel.U:
This variable conditionally defines the
HAS_FINITELsymbol, which indicates to the C program that the finitel() routine is available.d_flexfnamFrom d_flexfnam.U:
This variable conditionally defines the
FLEXFILENAMESsymbol, which indicates that the system supports filenames longer than 14 characters.d_flockFrom d_flock.U:
This variable conditionally defines
HAS_FLOCKif flock() is available to do file locking.d_flockprotoFrom d_flockproto.U:
This variable conditionally defines the
HAS_FLOCK_PROTOsymbol, which indicates to the C program that the system provides a prototype for the flock() function. Otherwise, it is up to the program to supply one.d_forkFrom d_fork.U:
This variable conditionally defines the
HAS_FORKsymbol, which indicates to the C program that the fork() routine is available.d_fp_classFrom d_fp_class.U:
This variable conditionally defines the
HAS_FP_CLASSsymbol, which indicates to the C program that the fp_class() routine is available.d_fpathconfFrom d_pathconf.U:
This variable conditionally defines the
HAS_FPATHCONFsymbol, which indicates to the C program that the pathconf() routine is available to determine file-system related limits and options associated with a given open file descriptor.d_fpclassFrom d_fpclass.U:
This variable conditionally defines the
HAS_FPCLASSsymbol, which indicates to the C program that the fpclass() routine is available.d_fpclassifyFrom d_fpclassify.U:
This variable conditionally defines the
HAS_FPCLASSIFYsymbol, which indicates to the C program that the fpclassify() routine is available.d_fpclasslFrom d_fpclassl.U:
This variable conditionally defines the
HAS_FPCLASSLsymbol, which indicates to the C program that the fpclassl() routine is available.d_fpos64_tFrom d_fpos64_t.U:
This symbol will be defined if the C compiler supports fpos64_t.
d_frexplFrom d_frexpl.U:
This variable conditionally defines the
HAS_FREXPLsymbol, which indicates to the C program that the frexpl() routine is available.d_fs_data_sFrom d_fs_data_s.U:
This variable conditionally defines the
HAS_STRUCT_FS_DATAsymbol, which indicates that the struct fs_data is supported.d_fseekoFrom d_fseeko.U:
This variable conditionally defines the
HAS_FSEEKOsymbol, which indicates to the C program that the fseeko() routine is available.d_fsetposFrom d_fsetpos.U:
This variable conditionally defines
HAS_FSETPOSif fsetpos() is available to set the file position indicator.d_fstatfsFrom d_fstatfs.U:
This variable conditionally defines the
HAS_FSTATFSsymbol, which indicates to the C program that the fstatfs() routine is available.d_fstatvfsFrom d_statvfs.U:
This variable conditionally defines the
HAS_FSTATVFSsymbol, which indicates to the C program that the fstatvfs() routine is available.d_fsyncFrom d_fsync.U:
This variable conditionally defines the
HAS_FSYNCsymbol, which indicates to the C program that the fsync() routine is available.d_ftelloFrom d_ftello.U:
This variable conditionally defines the
HAS_FTELLOsymbol, which indicates to the C program that the ftello() routine is available.d_ftimeFrom d_ftime.U:
This variable conditionally defines the
HAS_FTIMEsymbol, which indicates that the ftime() routine exists. The ftime() routine is basically a sub-second accuracy clock.d_futimesFrom d_futimes.U:
This variable conditionally defines the
HAS_FUTIMESsymbol, which indicates to the C program that the futimes() routine is available.d_GconvertFrom d_gconvert.U:
This variable holds what Gconvert is defined as to convert floating point numbers into strings. By default, Configure sets
thismacro to use the first of gconvert, gcvt, or sprintf that pass sprintf-%g-like behaviour tests. If perl is using long doubles, the macro uses the first of the following functions that pass Configure's tests: qgcvt, sprintf (if Configure knows how to make sprintf format long doubles--see sPRIgldbl), gconvert, gcvt, and sprintf (casting to double). The gconvert_preference and gconvert_ld_preference variables can be used to alter Configure's preferences, for doubles and long doubles, respectively. If present, they contain a space-separated list of one or more of the above function names in the order they should be tried.d_Gconvert may be set to override Configure with a platform- specific function. If this function expects a double, a different value may need to be set by the uselongdouble.cbu call-back unit so that long doubles can be formatted without loss of precision.
d_getcwdFrom d_getcwd.U:
This variable conditionally defines the
HAS_GETCWDsymbol, which indicates to the C program that the getcwd() routine is available to get the current working directory.d_getespwnamFrom d_getespwnam.U:
This variable conditionally defines
HAS_GETESPWNAMif getespwnam() is available to retrieve enchanced (shadow) password entries by name.d_getfsstatFrom d_getfsstat.U:
This variable conditionally defines the
HAS_GETFSSTATsymbol, which indicates to the C program that the getfsstat() routine is available.d_getgrentFrom d_getgrent.U:
This variable conditionally defines the
HAS_GETGRENTsymbol, which indicates to the C program that the getgrent() routine is available for sequential access of the group database.d_getgrent_rFrom d_getgrent_r.U:
This variable conditionally defines the
HAS_GETGRENT_Rsymbol, which indicates to the C program that the getgrent_r() routine is available.d_getgrgid_rFrom d_getgrgid_r.U:
This variable conditionally defines the
HAS_GETGRGID_Rsymbol, which indicates to the C program that the getgrgid_r() routine is available.d_getgrnam_rFrom d_getgrnam_r.U:
This variable conditionally defines the
HAS_GETGRNAM_Rsymbol, which indicates to the C program that the getgrnam_r() routine is available.d_getgrpsFrom d_getgrps.U:
This variable conditionally defines the
HAS_GETGROUPSsymbol, which indicates to the C program that the getgroups() routine is available to get the list of process groups.d_gethbyaddrFrom d_gethbyad.U:
This variable conditionally defines the
HAS_GETHOSTBYADDRsymbol, which indicates to the C program that the gethostbyaddr() routine is available to look up hosts by theirIPaddresses.d_gethbynameFrom d_gethbynm.U:
This variable conditionally defines the
HAS_GETHOSTBYNAMEsymbol, which indicates to the C program that the gethostbyname() routine is available to look up host names in some data base or other.d_gethentFrom d_gethent.U:
This variable conditionally defines
HAS_GETHOSTENTif gethostent() is available to look up host names in some data base or another.d_gethnameFrom d_gethname.U:
This variable conditionally defines the
HAS_GETHOSTNAMEsymbol, which indicates to the C program that the gethostname() routine may be used to derive the host name.d_gethostbyaddr_rFrom d_gethostbyaddr_r.U:
This variable conditionally defines the
HAS_GETHOSTBYADDR_Rsymbol, which indicates to the C program that the gethostbyaddr_r() routine is available.d_gethostbyname_rFrom d_gethostbyname_r.U:
This variable conditionally defines the
HAS_GETHOSTBYNAME_Rsymbol, which indicates to the C program that the gethostbyname_r() routine is available.d_gethostent_rFrom d_gethostent_r.U:
This variable conditionally defines the
HAS_GETHOSTENT_Rsymbol, which indicates to the C program that the gethostent_r() routine is available.d_gethostprotosFrom d_gethostprotos.U:
This variable conditionally defines the
HAS_GETHOST_PROTOSsymbol, which indicates to the C program that <netdb.h> supplies prototypes for the various gethost*() functions. See also netdbtype.U for probing for various netdb types.d_getitimerFrom d_getitimer.U:
This variable conditionally defines the
HAS_GETITIMERsymbol, which indicates to the C program that the getitimer() routine is available.d_getloginFrom d_getlogin.U:
This variable conditionally defines the
HAS_GETLOGINsymbol, which indicates to the C program that the getlogin() routine is available to get the login name.d_getlogin_rFrom d_getlogin_r.U:
This variable conditionally defines the
HAS_GETLOGIN_Rsymbol, which indicates to the C program that the getlogin_r() routine is available.d_getmntFrom d_getmnt.U:
This variable conditionally defines the
HAS_GETMNTsymbol, which indicates to the C program that the getmnt() routine is available to retrieve one or more mount info blocks by filename.d_getmntentFrom d_getmntent.U:
This variable conditionally defines the
HAS_GETMNTENTsymbol, which indicates to the C program that the getmntent() routine is available to iterate through mounted files to get their mount info.d_getnbyaddrFrom d_getnbyad.U:
This variable conditionally defines the
HAS_GETNETBYADDRsymbol, which indicates to the C program that the getnetbyaddr() routine is available to look up networks by theirIPaddresses.d_getnbynameFrom d_getnbynm.U:
This variable conditionally defines the
HAS_GETNETBYNAMEsymbol, which indicates to the C program that the getnetbyname() routine is available to look up networks by their names.d_getnentFrom d_getnent.U:
This variable conditionally defines
HAS_GETNETENTif getnetent() is available to look up network names in some data base or another.d_getnetbyaddr_rFrom d_getnetbyaddr_r.U:
This variable conditionally defines the
HAS_GETNETBYADDR_Rsymbol, which indicates to the C program that the getnetbyaddr_r() routine is available.d_getnetbyname_rFrom d_getnetbyname_r.U:
This variable conditionally defines the
HAS_GETNETBYNAME_Rsymbol, which indicates to the C program that the getnetbyname_r() routine is available.d_getnetent_rFrom d_getnetent_r.U:
This variable conditionally defines the
HAS_GETNETENT_Rsymbol, which indicates to the C program that the getnetent_r() routine is available.d_getnetprotosFrom d_getnetprotos.U:
This variable conditionally defines the
HAS_GETNET_PROTOSsymbol, which indicates to the C program that <netdb.h> supplies prototypes for the various getnet*() functions. See also netdbtype.U for probing for various netdb types.d_getpagszFrom d_getpagsz.U:
This variable conditionally defines
HAS_GETPAGESIZEif getpagesize() is available to get the system page size.d_getpbynameFrom d_getprotby.U:
This variable conditionally defines the
HAS_GETPROTOBYNAMEsymbol, which indicates to the C program that the getprotobyname() routine is available to look up protocols by their name.d_getpbynumberFrom d_getprotby.U:
This variable conditionally defines the
HAS_GETPROTOBYNUMBERsymbol, which indicates to the C program that the getprotobynumber() routine is available to look up protocols by their number.d_getpentFrom d_getpent.U:
This variable conditionally defines
HAS_GETPROTOENTif getprotoent() is available to look up protocols in some data base or another.d_getpgidFrom d_getpgid.U:
This variable conditionally defines the
HAS_GETPGIDsymbol, which indicates to the C program that the getpgid(pid) function is available to get the process group id.d_getpgrpFrom d_getpgrp.U:
This variable conditionally defines
HAS_GETPGRPif getpgrp() is available to get the current process group.d_getpgrp2From d_getpgrp2.U:
This variable conditionally defines the HAS_GETPGRP2 symbol, which indicates to the C program that the getpgrp2() (as in DG/
UX) routine is available to get the current process group.d_getppidFrom d_getppid.U:
This variable conditionally defines the
HAS_GETPPIDsymbol, which indicates to the C program that the getppid() routine is available to get the parent processID.d_getpriorFrom d_getprior.U:
This variable conditionally defines
HAS_GETPRIORITYif getpriority() is available to get a process's priority.d_getprotobyname_rFrom d_getprotobyname_r.U:
This variable conditionally defines the
HAS_GETPROTOBYNAME_Rsymbol, which indicates to the C program that the getprotobyname_r() routine is available.d_getprotobynumber_rFrom d_getprotobynumber_r.U:
This variable conditionally defines the
HAS_GETPROTOBYNUMBER_Rsymbol, which indicates to the C program that the getprotobynumber_r() routine is available.d_getprotoent_rFrom d_getprotoent_r.U:
This variable conditionally defines the
HAS_GETPROTOENT_Rsymbol, which indicates to the C program that the getprotoent_r() routine is available.d_getprotoprotosFrom d_getprotoprotos.U:
This variable conditionally defines the
HAS_GETPROTO_PROTOSsymbol, which indicates to the C program that <netdb.h> supplies prototypes for the various getproto*() functions. See also netdbtype.U for probing for various netdb types.d_getprpwnamFrom d_getprpwnam.U:
This variable conditionally defines
HAS_GETPRPWNAMif getprpwnam() is available to retrieve protected (shadow) password entries by name.d_getpwentFrom d_getpwent.U:
This variable conditionally defines the
HAS_GETPWENTsymbol, which indicates to the C program that the getpwent() routine is available for sequential access of the passwd database.d_getpwent_rFrom d_getpwent_r.U:
This variable conditionally defines the
HAS_GETPWENT_Rsymbol, which indicates to the C program that the getpwent_r() routine is available.d_getpwnam_rFrom d_getpwnam_r.U:
This variable conditionally defines the
HAS_GETPWNAM_Rsymbol, which indicates to the C program that the getpwnam_r() routine is available.d_getpwuid_rFrom d_getpwuid_r.U:
This variable conditionally defines the
HAS_GETPWUID_Rsymbol, which indicates to the C program that the getpwuid_r() routine is available.d_getsbynameFrom d_getsrvby.U:
This variable conditionally defines the
HAS_GETSERVBYNAMEsymbol, which indicates to the C program that the getservbyname() routine is available to look up services by their name.d_getsbyportFrom d_getsrvby.U:
This variable conditionally defines the
HAS_GETSERVBYPORTsymbol, which indicates to the C program that the getservbyport() routine is available to look up services by their port.d_getsentFrom d_getsent.U:
This variable conditionally defines
HAS_GETSERVENTif getservent() is available to look up network services in some data base or another.d_getservbyname_rFrom d_getservbyname_r.U:
This variable conditionally defines the
HAS_GETSERVBYNAME_Rsymbol, which indicates to the C program that the getservbyname_r() routine is available.d_getservbyport_rFrom d_getservbyport_r.U:
This variable conditionally defines the
HAS_GETSERVBYPORT_Rsymbol, which indicates to the C program that the getservbyport_r() routine is available.d_getservent_rFrom d_getservent_r.U:
This variable conditionally defines the
HAS_GETSERVENT_Rsymbol, which indicates to the C program that the getservent_r() routine is available.d_getservprotosFrom d_getservprotos.U:
This variable conditionally defines the
HAS_GETSERV_PROTOSsymbol, which indicates to the C program that <netdb.h> supplies prototypes for the various getserv*() functions. See also netdbtype.U for probing for various netdb types.d_getspnamFrom d_getspnam.U:
This variable conditionally defines
HAS_GETSPNAMif getspnam() is available to retrieve SysV shadow password entries by name.d_getspnam_rFrom d_getspnam_r.U:
This variable conditionally defines the
HAS_GETSPNAM_Rsymbol, which indicates to the C program that the getspnam_r() routine is available.d_gettimeodFrom d_ftime.U:
This variable conditionally defines the
HAS_GETTIMEOFDAYsymbol, which indicates that the gettimeofday() system call exists (to obtain a sub-second accuracy clock). You should probably include <sys/resource.h>.d_gmtime_rFrom d_gmtime_r.U:
This variable conditionally defines the
HAS_GMTIME_Rsymbol, which indicates to the C program that the gmtime_r() routine is available.d_gnulibcFrom d_gnulibc.U:
Defined if we're dealing with the
GNUC Library.d_grpasswdFrom i_grp.U:
This variable conditionally defines
GRPASSWD, which indicates that struct group in <grp.h> contains gr_passwd.d_hasmntoptFrom d_hasmntopt.U:
This variable conditionally defines the
HAS_HASMNTOPTsymbol, which indicates to the C program that the hasmntopt() routine is available to query the mount options of file systems.d_htonlFrom d_htonl.U:
This variable conditionally defines
HAS_HTONLif htonl() and its friends are available to do network order byte swapping.d_ilogblFrom d_ilogbl.U:
This variable conditionally defines the
HAS_ILOGBLsymbol, which indicates to the C program that the ilogbl() routine is available. If scalbnl is also present we can emulate frexpl.d_inc_version_listFrom inc_version_list.U:
This variable conditionally defines
PERL_INC_VERSION_LIST. It is set to undef whenPERL_INC_VERSION_LISTis empty.d_indexFrom d_strchr.U:
This variable conditionally defines
HAS_INDEXif index() and rindex() are available for string searching.d_inetatonFrom d_inetaton.U:
This variable conditionally defines the
HAS_INET_ATONsymbol, which indicates to the C program that the inet_aton() function is available to parseIPaddressdotted-quadstrings.d_int64_tFrom d_int64_t.U:
This symbol will be defined if the C compiler supports int64_t.
d_isasciiFrom d_isascii.U:
This variable conditionally defines the
HAS_ISASCIIconstant, which indicates to the C program that isascii() is available.d_isfiniteFrom d_isfinite.U:
This variable conditionally defines the
HAS_ISFINITEsymbol, which indicates to the C program that the isfinite() routine is available.d_isinfFrom d_isinf.U:
This variable conditionally defines the
HAS_ISINFsymbol, which indicates to the C program that the isinf() routine is available.d_isnanFrom d_isnan.U:
This variable conditionally defines the
HAS_ISNANsymbol, which indicates to the C program that the isnan() routine is available.d_isnanlFrom d_isnanl.U:
This variable conditionally defines the
HAS_ISNANLsymbol, which indicates to the C program that the isnanl() routine is available.d_killpgFrom d_killpg.U:
This variable conditionally defines the
HAS_KILLPGsymbol, which indicates to the C program that the killpg() routine is available to kill process groups.d_lchownFrom d_lchown.U:
This variable conditionally defines the
HAS_LCHOWNsymbol, which indicates to the C program that the lchown() routine is available to operate on a symbolic link (instead of following the link).d_ldbl_digFrom d_ldbl_dig.U:
This variable conditionally defines d_ldbl_dig if this system's header files provide
LDBL_DIG, which is the number of significant digits in a long double precision number.d_libm_lib_versionFrom d_libm_lib_version.U:
This variable conditionally defines the
LIBM_LIB_VERSIONsymbol, which indicates to the C program that math.h defines_LIB_VERSIONbeing available in libmd_linkFrom d_link.U:
This variable conditionally defines
HAS_LINKif link() is available to create hard links.d_localtime_rFrom d_localtime_r.U:
This variable conditionally defines the
HAS_LOCALTIME_Rsymbol, which indicates to the C program that the localtime_r() routine is available.d_localtime_r_needs_tzsetFrom d_localtime_r.U:
This variable conditionally defines the
LOCALTIME_R_NEEDS_TZSETsymbol, which makes us call tzset before localtime_r()d_locconvFrom d_locconv.U:
This variable conditionally defines
HAS_LOCALECONVif localeconv() is available for numeric and monetary formatting conventions.d_lockfFrom d_lockf.U:
This variable conditionally defines
HAS_LOCKFif lockf() is available to do file locking.d_longdblFrom d_longdbl.U:
This variable conditionally defines
HAS_LONG_DOUBLEif the long double type is supported.d_longlongFrom d_longlong.U:
This variable conditionally defines
HAS_LONG_LONGif the long long type is supported.d_lseekprotoFrom d_lseekproto.U:
This variable conditionally defines the
HAS_LSEEK_PROTOsymbol, which indicates to the C program that the system provides a prototype for the lseek() function. Otherwise, it is up to the program to supply one.d_lstatFrom d_lstat.U:
This variable conditionally defines
HAS_LSTATif lstat() is available to do file stats on symbolic links.d_madviseFrom d_madvise.U:
This variable conditionally defines
HAS_MADVISEif madvise() is available to map a file into memory.d_malloc_good_sizeFrom d_malloc_size.U:
This symbol, if defined, indicates that the malloc_good_size routine is available for use.
d_malloc_sizeFrom d_malloc_size.U:
This symbol, if defined, indicates that the malloc_size routine is available for use.
d_mblenFrom d_mblen.U:
This variable conditionally defines the
HAS_MBLENsymbol, which indicates to the C program that the mblen() routine is available to find the number of bytes in a multibye character.d_mbstowcsFrom d_mbstowcs.U:
This variable conditionally defines the
HAS_MBSTOWCSsymbol, which indicates to the C program that the mbstowcs() routine is available to convert a multibyte string into a wide character string.d_mbtowcFrom d_mbtowc.U:
This variable conditionally defines the
HAS_MBTOWCsymbol, which indicates to the C program that the mbtowc() routine is available to convert multibyte to a wide character.d_memchrFrom d_memchr.U:
This variable conditionally defines the
HAS_MEMCHRsymbol, which indicates to the C program that the memchr() routine is available to locate characters within a C string.d_memcmpFrom d_memcmp.U:
This variable conditionally defines the
HAS_MEMCMPsymbol, which indicates to the C program that the memcmp() routine is available to compare blocks of memory.d_memcpyFrom d_memcpy.U:
This variable conditionally defines the
HAS_MEMCPYsymbol, which indicates to the C program that the memcpy() routine is available to copy blocks of memory.d_memmoveFrom d_memmove.U:
This variable conditionally defines the
HAS_MEMMOVEsymbol, which indicates to the C program that the memmove() routine is available to copy potentatially overlapping blocks of memory.d_memsetFrom d_memset.U:
This variable conditionally defines the
HAS_MEMSETsymbol, which indicates to the C program that the memset() routine is available to set blocks of memory.d_mkdirFrom d_mkdir.U:
This variable conditionally defines the
HAS_MKDIRsymbol, which indicates to the C program that the mkdir() routine is available to create directories..d_mkdtempFrom d_mkdtemp.U:
This variable conditionally defines the
HAS_MKDTEMPsymbol, which indicates to the C program that the mkdtemp() routine is available to exclusively create a uniquely named temporary directory.d_mkfifoFrom d_mkfifo.U:
This variable conditionally defines the
HAS_MKFIFOsymbol, which indicates to the C program that the mkfifo() routine is available.d_mkstempFrom d_mkstemp.U:
This variable conditionally defines the
HAS_MKSTEMPsymbol, which indicates to the C program that the mkstemp() routine is available to exclusively create and open a uniquely named temporary file.d_mkstempsFrom d_mkstemps.U:
This variable conditionally defines the
HAS_MKSTEMPSsymbol, which indicates to the C program that the mkstemps() routine is available to exclusively create and open a uniquely named (with a suffix) temporary file.d_mktimeFrom d_mktime.U:
This variable conditionally defines the
HAS_MKTIMEsymbol, which indicates to the C program that the mktime() routine is available.d_mmapFrom d_mmap.U:
This variable conditionally defines
HAS_MMAPif mmap() is available to map a file into memory.d_modflFrom d_modfl.U:
This variable conditionally defines the
HAS_MODFLsymbol, which indicates to the C program that the modfl() routine is available.d_modfl_pow32_bugFrom d_modfl.U:
This variable conditionally defines the HAS_MODFL_POW32_BUG symbol, which indicates that modfl() is broken for long doubles >= pow(2, 32). For example from 4294967303.150000 one would get 4294967302.000000 and 1.150000. The bug has been seen in certain versions of glibc, release 2.2.2 is known to be okay.
d_modflprotoFrom d_modfl.U:
This symbol, if defined, indicates that the system provides a prototype for the modfl() function. Otherwise, it is up to the program to supply one. C99 says it should be long double modfl(long double, long double *);
d_mprotectFrom d_mprotect.U:
This variable conditionally defines
HAS_MPROTECTif mprotect() is available to modify the access protection of a memory mapped file.d_msgFrom d_msg.U:
This variable conditionally defines the
HAS_MSGsymbol, which indicates that the entire msg*(2) library is present.d_msg_ctruncFrom d_socket.U:
This variable conditionally defines the
HAS_MSG_CTRUNCsymbol, which indicates that theMSG_CTRUNCis available. #ifdef is not enough because it may be an enum, glibc has been known to do this.d_msg_dontrouteFrom d_socket.U:
This variable conditionally defines the
HAS_MSG_DONTROUTEsymbol, which indicates that theMSG_DONTROUTEis available. #ifdef is not enough because it may be an enum, glibc has been known to do this.d_msg_oobFrom d_socket.U:
This variable conditionally defines the
HAS_MSG_OOBsymbol, which indicates that theMSG_OOBis available. #ifdef is not enough because it may be an enum, glibc has been known to do this.d_msg_peekFrom d_socket.U:
This variable conditionally defines the
HAS_MSG_PEEKsymbol, which indicates that theMSG_PEEKis available. #ifdef is not enough because it may be an enum, glibc has been known to do this.d_msg_proxyFrom d_socket.U:
This variable conditionally defines the
HAS_MSG_PROXYsymbol, which indicates that theMSG_PROXYis available. #ifdef is not enough because it may be an enum, glibc has been known to do this.d_msgctlFrom d_msgctl.U:
This variable conditionally defines the
HAS_MSGCTLsymbol, which indicates to the C program that the msgctl() routine is available.d_msggetFrom d_msgget.U:
This variable conditionally defines the
HAS_MSGGETsymbol, which indicates to the C program that the msgget() routine is available.d_msghdr_sFrom d_msghdr_s.U:
This variable conditionally defines the
HAS_STRUCT_MSGHDRsymbol, which indicates that the struct msghdr is supported.d_msgrcvFrom d_msgrcv.U:
This variable conditionally defines the
HAS_MSGRCVsymbol, which indicates to the C program that the msgrcv() routine is available.d_msgsndFrom d_msgsnd.U:
This variable conditionally defines the
HAS_MSGSNDsymbol, which indicates to the C program that the msgsnd() routine is available.d_msyncFrom d_msync.U:
This variable conditionally defines
HAS_MSYNCif msync() is available to synchronize a mapped file.d_munmapFrom d_munmap.U:
This variable conditionally defines
HAS_MUNMAPif munmap() is available to unmap a region mapped by mmap().d_mymallocFrom mallocsrc.U:
This variable conditionally defines
MYMALLOCin case other parts of the source want to take special action ifMYMALLOCis used. This may include different sorts of profiling or error detection.d_niceFrom d_nice.U:
This variable conditionally defines the
HAS_NICEsymbol, which indicates to the C program that the nice() routine is available.d_nl_langinfoFrom d_nl_langinfo.U:
This variable conditionally defines the
HAS_NL_LANGINFOsymbol, which indicates to the C program that the nl_langinfo() routine is available.d_nv_preserves_uvFrom perlxv.U:
This variable indicates whether a variable of type nvtype can preserve all the bits a variable of type uvtype.
d_nv_zero_is_allbits_zeroFrom perlxv.U:
This variable indicates whether a variable of type nvtype stores 0.0 in memory as all bits zero.
d_off64_tFrom d_off64_t.U:
This symbol will be defined if the C compiler supports off64_t.
d_old_pthread_create_joinableFrom d_pthrattrj.U:
This variable conditionally defines pthread_create_joinable. undef if pthread.h defines
PTHREAD_CREATE_JOINABLE.d_oldpthreadsFrom usethreads.U:
This variable conditionally defines the
OLD_PTHREADS_APIsymbol, and indicates that Perl should be built to use the old draftPOSIXthreadsAPI. This is only potentially meaningful if usethreads is set.d_oldsockFrom d_socket.U:
This variable conditionally defines the
OLDSOCKETsymbol, which indicates that theBSDsocket interface is based on 4.1c and not 4.2.d_open3From d_open3.U:
This variable conditionally defines the HAS_OPEN3 manifest constant, which indicates to the C program that the 3 argument version of the open(2) function is available.
d_pathconfFrom d_pathconf.U:
This variable conditionally defines the
HAS_PATHCONFsymbol, which indicates to the C program that the pathconf() routine is available to determine file-system related limits and options associated with a given filename.d_pauseFrom d_pause.U:
This variable conditionally defines the
HAS_PAUSEsymbol, which indicates to the C program that the pause() routine is available to suspend a process until a signal is received.d_perl_otherlibdirsFrom otherlibdirs.U:
This variable conditionally defines
PERL_OTHERLIBDIRS, which contains a colon-separated set of paths for the perl binary to include in @INC. See also otherlibdirs.d_phostnameFrom d_gethname.U:
This variable conditionally defines the
HAS_PHOSTNAMEsymbol, which contains the shell command which, when fed to popen(), may be used to derive the host name.d_pipeFrom d_pipe.U:
This variable conditionally defines the
HAS_PIPEsymbol, which indicates to the C program that the pipe() routine is available to create an inter-process channel.d_pollFrom d_poll.U:
This variable conditionally defines the
HAS_POLLsymbol, which indicates to the C program that the poll() routine is available to poll active file descriptors.d_portableFrom d_portable.U:
This variable conditionally defines the
PORTABLEsymbol, which indicates to the C program that it should not assume that it is running on the machine it was compiled on.d_PRId64From quadfio.U:
This variable conditionally defines the PERL_PRId64 symbol, which indiciates that stdio has a symbol to print 64-bit decimal numbers.
d_PRIeldblFrom longdblfio.U:
This variable conditionally defines the PERL_PRIfldbl symbol, which indiciates that stdio has a symbol to print long doubles.
d_PRIEUldblFrom longdblfio.U:
This variable conditionally defines the PERL_PRIfldbl symbol, which indiciates that stdio has a symbol to print long doubles. The
Uin the name is to separate this from d_PRIeldbl so that even case-blind systems can see the difference.d_PRIfldblFrom longdblfio.U:
This variable conditionally defines the PERL_PRIfldbl symbol, which indiciates that stdio has a symbol to print long doubles.
d_PRIFUldblFrom longdblfio.U:
This variable conditionally defines the PERL_PRIfldbl symbol, which indiciates that stdio has a symbol to print long doubles. The
Uin the name is to separate this from d_PRIfldbl so that even case-blind systems can see the difference.d_PRIgldblFrom longdblfio.U:
This variable conditionally defines the PERL_PRIfldbl symbol, which indiciates that stdio has a symbol to print long doubles.
d_PRIGUldblFrom longdblfio.U:
This variable conditionally defines the PERL_PRIfldbl symbol, which indiciates that stdio has a symbol to print long doubles. The
Uin the name is to separate this from d_PRIgldbl so that even case-blind systems can see the difference.d_PRIi64From quadfio.U:
This variable conditionally defines the PERL_PRIi64 symbol, which indiciates that stdio has a symbol to print 64-bit decimal numbers.
d_printf_format_nullFrom d_attribut.U:
This variable conditionally defines
PRINTF_FORMAT_NULL_OK, which indicates the C compiler allows printf-like formats to be null.d_PRIo64From quadfio.U:
This variable conditionally defines the PERL_PRIo64 symbol, which indiciates that stdio has a symbol to print 64-bit octal numbers.
d_PRIu64From quadfio.U:
This variable conditionally defines the PERL_PRIu64 symbol, which indiciates that stdio has a symbol to print 64-bit unsigned decimal numbers.
d_PRIx64From quadfio.U:
This variable conditionally defines the PERL_PRIx64 symbol, which indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
d_PRIXU64From quadfio.U:
This variable conditionally defines the PERL_PRIXU64 symbol, which indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers. The
Uin the name is to separate this from d_PRIx64 so that even case-blind systems can see the difference.d_procselfexeFrom d_procselfexe.U:
Defined if $procselfexe is symlink to the absolute pathname of the executing program.
d_pseudoforkFrom d_vfork.U:
This variable conditionally defines the
HAS_PSEUDOFORKsymbol, which indicates that an emulation of the fork routine is available.d_pthread_atforkFrom d_pthread_atfork.U:
This variable conditionally defines the
HAS_PTHREAD_ATFORKsymbol, which indicates to the C program that the pthread_atfork() routine is available.d_pthread_attr_setscopeFrom d_pthread_attr_ss.U:
This variable conditionally defines
HAS_PTHREAD_ATTR_SETSCOPEif pthread_attr_setscope() is available to set the contention scope attribute of a thread attribute object.d_pthread_yieldFrom d_pthread_y.U:
This variable conditionally defines the
HAS_PTHREAD_YIELDsymbol if the pthread_yield routine is available to yield the execution of the current thread.d_pwageFrom i_pwd.U:
This variable conditionally defines
PWAGE, which indicates that struct passwd contains pw_age.d_pwchangeFrom i_pwd.U:
This variable conditionally defines
PWCHANGE, which indicates that struct passwd contains pw_change.d_pwclassFrom i_pwd.U:
This variable conditionally defines
PWCLASS, which indicates that struct passwd contains pw_class.d_pwcommentFrom i_pwd.U:
This variable conditionally defines
PWCOMMENT, which indicates that struct passwd contains pw_comment.d_pwexpireFrom i_pwd.U:
This variable conditionally defines
PWEXPIRE, which indicates that struct passwd contains pw_expire.d_pwgecosFrom i_pwd.U:
This variable conditionally defines
PWGECOS, which indicates that struct passwd contains pw_gecos.d_pwpasswdFrom i_pwd.U:
This variable conditionally defines
PWPASSWD, which indicates that struct passwd contains pw_passwd.d_pwquotaFrom i_pwd.U:
This variable conditionally defines
PWQUOTA, which indicates that struct passwd contains pw_quota.d_qgcvtFrom d_qgcvt.U:
This variable conditionally defines the
HAS_QGCVTsymbol, which indicates to the C program that the qgcvt() routine is available.d_quadFrom quadtype.U:
This variable, if defined, tells that there's a 64-bit integer type, quadtype.
d_random_rFrom d_random_r.U:
This variable conditionally defines the
HAS_RANDOM_Rsymbol, which indicates to the C program that the random_r() routine is available.d_readdirFrom d_readdir.U:
This variable conditionally defines
HAS_READDIRif readdir() is available to read directory entries.d_readdir64_rFrom d_readdir64_r.U:
This variable conditionally defines the HAS_READDIR64_R symbol, which indicates to the C program that the readdir64_r() routine is available.
d_readdir_rFrom d_readdir_r.U:
This variable conditionally defines the
HAS_READDIR_Rsymbol, which indicates to the C program that the readdir_r() routine is available.d_readlinkFrom d_readlink.U:
This variable conditionally defines the
HAS_READLINKsymbol, which indicates to the C program that the readlink() routine is available to read the value of a symbolic link.d_readvFrom d_readv.U:
This variable conditionally defines the
HAS_READVsymbol, which indicates to the C program that the readv() routine is available.d_recvmsgFrom d_recvmsg.U:
This variable conditionally defines the
HAS_RECVMSGsymbol, which indicates to the C program that the recvmsg() routine is available.d_renameFrom d_rename.U:
This variable conditionally defines the
HAS_RENAMEsymbol, which indicates to the C program that the rename() routine is available to rename files.d_rewinddirFrom d_readdir.U:
This variable conditionally defines
HAS_REWINDDIRif rewinddir() is available.d_rmdirFrom d_rmdir.U:
This variable conditionally defines
HAS_RMDIRif rmdir() is available to remove directories.d_safebcpyFrom d_safebcpy.U:
This variable conditionally defines the
HAS_SAFE_BCOPYsymbol if the bcopy() routine can do overlapping copies. Normally, you should probably use memmove().d_safemcpyFrom d_safemcpy.U:
This variable conditionally defines the
HAS_SAFE_MEMCPYsymbol if the memcpy() routine can do overlapping copies. For overlapping copies, memmove() should be used, if available.d_sanemcmpFrom d_sanemcmp.U:
This variable conditionally defines the
HAS_SANE_MEMCMPsymbol if the memcpy() routine is available and can be used to compare relative magnitudes of chars with their high bits set.d_sbrkprotoFrom d_sbrkproto.U:
This variable conditionally defines the
HAS_SBRK_PROTOsymbol, which indicates to the C program that the system provides a prototype for the sbrk() function. Otherwise, it is up to the program to supply one.d_scalbnlFrom d_scalbnl.U:
This variable conditionally defines the
HAS_SCALBNLsymbol, which indicates to the C program that the scalbnl() routine is available. If ilogbl is also present we can emulate frexpl.d_sched_yieldFrom d_pthread_y.U:
This variable conditionally defines the
HAS_SCHED_YIELDsymbol if the sched_yield routine is available to yield the execution of the current thread.d_scm_rightsFrom d_socket.U:
This variable conditionally defines the
HAS_SCM_RIGHTSsymbol, which indicates that theSCM_RIGHTSis available. #ifdef is not enough because it may be an enum, glibc has been known to do this.d_SCNfldblFrom longdblfio.U:
This variable conditionally defines the PERL_PRIfldbl symbol, which indiciates that stdio has a symbol to scan long doubles.
d_seekdirFrom d_readdir.U:
This variable conditionally defines
HAS_SEEKDIRif seekdir() is available.d_selectFrom d_select.U:
This variable conditionally defines
HAS_SELECTif select() is available to select active file descriptors. A <sys/time.h> inclusion may be necessary for the timeout field.d_semFrom d_sem.U:
This variable conditionally defines the
HAS_SEMsymbol, which indicates that the entire sem*(2) library is present.d_semctlFrom d_semctl.U:
This variable conditionally defines the
HAS_SEMCTLsymbol, which indicates to the C program that the semctl() routine is available.d_semctl_semid_dsFrom d_union_semun.U:
This variable conditionally defines
USE_SEMCTL_SEMID_DS, which indicates that struct semid_ds * is to be used for semctlIPC_STAT.d_semctl_semunFrom d_union_semun.U:
This variable conditionally defines
USE_SEMCTL_SEMUN, which indicates that union semun is to be used for semctlIPC_STAT.d_semgetFrom d_semget.U:
This variable conditionally defines the
HAS_SEMGETsymbol, which indicates to the C program that the semget() routine is available.d_semopFrom d_semop.U:
This variable conditionally defines the
HAS_SEMOPsymbol, which indicates to the C program that the semop() routine is available.d_sendmsgFrom d_sendmsg.U:
This variable conditionally defines the
HAS_SENDMSGsymbol, which indicates to the C program that the sendmsg() routine is available.d_setegidFrom d_setegid.U:
This variable conditionally defines the
HAS_SETEGIDsymbol, which indicates to the C program that the setegid() routine is available to change the effective gid of the current program.d_seteuidFrom d_seteuid.U:
This variable conditionally defines the
HAS_SETEUIDsymbol, which indicates to the C program that the seteuid() routine is available to change the effective uid of the current program.d_setgrentFrom d_setgrent.U:
This variable conditionally defines the
HAS_SETGRENTsymbol, which indicates to the C program that the setgrent() routine is available for initializing sequential access to the group database.d_setgrent_rFrom d_setgrent_r.U:
This variable conditionally defines the
HAS_SETGRENT_Rsymbol, which indicates to the C program that the setgrent_r() routine is available.d_setgrpsFrom d_setgrps.U:
This variable conditionally defines the
HAS_SETGROUPSsymbol, which indicates to the C program that the setgroups() routine is available to set the list of process groups.d_sethentFrom d_sethent.U:
This variable conditionally defines
HAS_SETHOSTENTif sethostent() is available.d_sethostent_rFrom d_sethostent_r.U:
This variable conditionally defines the
HAS_SETHOSTENT_Rsymbol, which indicates to the C program that the sethostent_r() routine is available.d_setitimerFrom d_setitimer.U:
This variable conditionally defines the
HAS_SETITIMERsymbol, which indicates to the C program that the setitimer() routine is available.d_setlinebufFrom d_setlnbuf.U:
This variable conditionally defines the
HAS_SETLINEBUFsymbol, which indicates to the C program that the setlinebuf() routine is available to change stderr or stdout from block-buffered or unbuffered to a line-buffered mode.d_setlocaleFrom d_setlocale.U:
This variable conditionally defines
HAS_SETLOCALEif setlocale() is available to handle locale-specific ctype implementations.d_setlocale_rFrom d_setlocale_r.U:
This variable conditionally defines the
HAS_SETLOCALE_Rsymbol, which indicates to the C program that the setlocale_r() routine is available.d_setnentFrom d_setnent.U:
This variable conditionally defines
HAS_SETNETENTif setnetent() is available.d_setnetent_rFrom d_setnetent_r.U:
This variable conditionally defines the
HAS_SETNETENT_Rsymbol, which indicates to the C program that the setnetent_r() routine is available.d_setpentFrom d_setpent.U:
This variable conditionally defines
HAS_SETPROTOENTif setprotoent() is available.d_setpgidFrom d_setpgid.U:
This variable conditionally defines the
HAS_SETPGIDsymbol if the setpgid(pid, gpid) function is available to set process groupID.d_setpgrpFrom d_setpgrp.U:
This variable conditionally defines
HAS_SETPGRPif setpgrp() is available to set the current process group.d_setpgrp2From d_setpgrp2.U:
This variable conditionally defines the HAS_SETPGRP2 symbol, which indicates to the C program that the setpgrp2() (as in DG/
UX) routine is available to set the current process group.d_setpriorFrom d_setprior.U:
This variable conditionally defines
HAS_SETPRIORITYif setpriority() is available to set a process's priority.d_setproctitleFrom d_setproctitle.U:
This variable conditionally defines the
HAS_SETPROCTITLEsymbol, which indicates to the C program that the setproctitle() routine is available.d_setprotoent_rFrom d_setprotoent_r.U:
This variable conditionally defines the
HAS_SETPROTOENT_Rsymbol, which indicates to the C program that the setprotoent_r() routine is available.d_setpwentFrom d_setpwent.U:
This variable conditionally defines the
HAS_SETPWENTsymbol, which indicates to the C program that the setpwent() routine is available for initializing sequential access to the passwd database.d_setpwent_rFrom d_setpwent_r.U:
This variable conditionally defines the
HAS_SETPWENT_Rsymbol, which indicates to the C program that the setpwent_r() routine is available.d_setregidFrom d_setregid.U:
This variable conditionally defines
HAS_SETREGIDif setregid() is available to change the real and effective gid of the current process.d_setresgidFrom d_setregid.U:
This variable conditionally defines
HAS_SETRESGIDif setresgid() is available to change the real, effective and saved gid of the current process.d_setresuidFrom d_setreuid.U:
This variable conditionally defines
HAS_SETREUIDif setresuid() is available to change the real, effective and saved uid of the current process.d_setreuidFrom d_setreuid.U:
This variable conditionally defines
HAS_SETREUIDif setreuid() is available to change the real and effective uid of the current process.d_setrgidFrom d_setrgid.U:
This variable conditionally defines the
HAS_SETRGIDsymbol, which indicates to the C program that the setrgid() routine is available to change the real gid of the current program.d_setruidFrom d_setruid.U:
This variable conditionally defines the
HAS_SETRUIDsymbol, which indicates to the C program that the setruid() routine is available to change the real uid of the current program.d_setsentFrom d_setsent.U:
This variable conditionally defines
HAS_SETSERVENTif setservent() is available.d_setservent_rFrom d_setservent_r.U:
This variable conditionally defines the
HAS_SETSERVENT_Rsymbol, which indicates to the C program that the setservent_r() routine is available.d_setsidFrom d_setsid.U:
This variable conditionally defines
HAS_SETSIDif setsid() is available to set the process groupID.d_setvbufFrom d_setvbuf.U:
This variable conditionally defines the
HAS_SETVBUFsymbol, which indicates to the C program that the setvbuf() routine is available to change buffering on an open stdio stream.d_sfioFrom d_sfio.U:
This variable conditionally defines the
USE_SFIOsymbol, and indicates whether sfio is available (and should be used).d_shmFrom d_shm.U:
This variable conditionally defines the
HAS_SHMsymbol, which indicates that the entire shm*(2) library is present.d_shmatFrom d_shmat.U:
This variable conditionally defines the
HAS_SHMATsymbol, which indicates to the C program that the shmat() routine is available.d_shmatprototypeFrom d_shmat.U:
This variable conditionally defines the
HAS_SHMAT_PROTOTYPEsymbol, which indicates that sys/shm.h has a prototype for shmat.d_shmctlFrom d_shmctl.U:
This variable conditionally defines the
HAS_SHMCTLsymbol, which indicates to the C program that the shmctl() routine is available.d_shmdtFrom d_shmdt.U:
This variable conditionally defines the
HAS_SHMDTsymbol, which indicates to the C program that the shmdt() routine is available.d_shmgetFrom d_shmget.U:
This variable conditionally defines the
HAS_SHMGETsymbol, which indicates to the C program that the shmget() routine is available.d_sigactionFrom d_sigaction.U:
This variable conditionally defines the
HAS_SIGACTIONsymbol, which indicates that the Vr4 sigaction() routine is available.d_signbitFrom d_signbit.U:
This variable conditionally defines the
HAS_SIGNBITsymbol, which indicates to the C program that the signbit() routine is available and safe to use with perl's internNVtype.d_sigprocmaskFrom d_sigprocmask.U:
This variable conditionally defines
HAS_SIGPROCMASKif sigprocmask() is available to examine or change the signal mask of the calling process.d_sigsetjmpFrom d_sigsetjmp.U:
This variable conditionally defines the
HAS_SIGSETJMPsymbol, which indicates that the sigsetjmp() routine is available to call setjmp() and optionally save the process's signal mask.d_sitearchFrom sitearch.U:
This variable conditionally defines
SITEARCHto hold the pathname of architecture-dependent library files for $package. If $sitearch is the same as $archlib, then this is set to undef.d_snprintfFrom d_snprintf.U:
This variable conditionally defines the
HAS_SNPRINTFsymbol, which indicates to the C program that the snprintf () library function is available.d_sockatmarkFrom d_sockatmark.U:
This variable conditionally defines the
HAS_SOCKATMARKsymbol, which indicates to the C program that the sockatmark() routine is available.d_sockatmarkprotoFrom d_sockatmarkproto.U:
This variable conditionally defines the
HAS_SOCKATMARK_PROTOsymbol, which indicates to the C program that the system provides a prototype for the sockatmark() function. Otherwise, it is up to the program to supply one.d_socketFrom d_socket.U:
This variable conditionally defines
HAS_SOCKET, which indicates that theBSDsocket interface is supported.d_socklen_tFrom d_socklen_t.U:
This symbol will be defined if the C compiler supports socklen_t.
d_sockpairFrom d_socket.U:
This variable conditionally defines the
HAS_SOCKETPAIRsymbol, which indicates that theBSDsocketpair() is supported.d_socks5_initFrom d_socks5_init.U:
This variable conditionally defines the HAS_SOCKS5_INIT symbol, which indicates to the C program that the socks5_init() routine is available.
d_sprintf_returns_strlenFrom d_sprintf_len.U:
This variable defines whether sprintf returns the length of the string (as per the
ANSIspec). Some C libraries retain compatibility with pre-ANSIC and return a pointer to the passed in buffer; for these this variable will be undef.d_sqrtlFrom d_sqrtl.U:
This variable conditionally defines the
HAS_SQRTLsymbol, which indicates to the C program that the sqrtl() routine is available.d_srand48_rFrom d_srand48_r.U:
This variable conditionally defines the HAS_SRAND48_R symbol, which indicates to the C program that the srand48_r() routine is available.
d_srandom_rFrom d_srandom_r.U:
This variable conditionally defines the
HAS_SRANDOM_Rsymbol, which indicates to the C program that the srandom_r() routine is available.d_sresgprotoFrom d_sresgproto.U:
This variable conditionally defines the
HAS_SETRESGID_PROTOsymbol, which indicates to the C program that the system provides a prototype for the setresgid() function. Otherwise, it is up to the program to supply one.d_sresuprotoFrom d_sresuproto.U:
This variable conditionally defines the
HAS_SETRESUID_PROTOsymbol, which indicates to the C program that the system provides a prototype for the setresuid() function. Otherwise, it is up to the program to supply one.d_statblksFrom d_statblks.U:
This variable conditionally defines
USE_STAT_BLOCKSif this system has a stat structure declaring st_blksize and st_blocks.d_statfs_f_flagsFrom d_statfs_f_flags.U:
This variable conditionally defines the
HAS_STRUCT_STATFS_F_FLAGSsymbol, which indicates to struct statfs from has f_flags member. This kind of struct statfs is coming from sys/mount.h (BSD), not from sys/statfs.h (SYSV).d_statfs_sFrom d_statfs_s.U:
This variable conditionally defines the
HAS_STRUCT_STATFSsymbol, which indicates that the struct statfs is supported.d_statvfsFrom d_statvfs.U:
This variable conditionally defines the
HAS_STATVFSsymbol, which indicates to the C program that the statvfs() routine is available.d_stdio_cnt_lvalFrom d_stdstdio.U:
This variable conditionally defines
STDIO_CNT_LVALUEif theFILE_cntmacro can be used as an lvalue.d_stdio_ptr_lvalFrom d_stdstdio.U:
This variable conditionally defines
STDIO_PTR_LVALUEif theFILE_ptrmacro can be used as an lvalue.d_stdio_ptr_lval_nochange_cntFrom d_stdstdio.U:
This symbol is defined if using the
FILE_ptrmacro as an lvalue to increase the pointer by n leaves File_cnt(fp) unchanged.d_stdio_ptr_lval_sets_cntFrom d_stdstdio.U:
This symbol is defined if using the
FILE_ptrmacro as an lvalue to increase the pointer by n has the side effect of decreasing the value of File_cnt(fp) by n.d_stdio_stream_arrayFrom stdio_streams.U:
This variable tells whether there is an array holding the stdio streams.
d_stdiobaseFrom d_stdstdio.U:
This variable conditionally defines
USE_STDIO_BASEif this system has aFILEstructure declaring a usable _base field (or equivalent) in stdio.h.d_stdstdioFrom d_stdstdio.U:
This variable conditionally defines
USE_STDIO_PTRif this system has aFILEstructure declaring usable _ptr and _cnt fields (or equivalent) in stdio.h.d_strchrFrom d_strchr.U:
This variable conditionally defines
HAS_STRCHRif strchr() and strrchr() are available for string searching.d_strcollFrom d_strcoll.U:
This variable conditionally defines
HAS_STRCOLLif strcoll() is available to compare strings using collating information.d_strctcpyFrom d_strctcpy.U:
This variable conditionally defines the
USE_STRUCT_COPYsymbol, which indicates to the C program that this C compiler knows how to copy structures.d_strerrmFrom d_strerror.U:
This variable holds what Strerrr is defined as to translate an error code condition into an error message string. It could be
strerroror a morecomplexmacro emulating strrror with sys_errlist[], or theunknownstring when both strerror and sys_errlist are missing.d_strerrorFrom d_strerror.U:
This variable conditionally defines
HAS_STRERRORif strerror() is available to translate error numbers to strings.d_strerror_rFrom d_strerror_r.U:
This variable conditionally defines the
HAS_STRERROR_Rsymbol, which indicates to the C program that the strerror_r() routine is available.d_strftimeFrom d_strftime.U:
This variable conditionally defines the
HAS_STRFTIMEsymbol, which indicates to the C program that the strftime() routine is available.d_strlcatFrom d_strlcat.U:
This variable conditionally defines the
HAS_STRLCATsymbol, which indicates to the C program that the strlcat () routine is available.d_strlcpyFrom d_strlcpy.U:
This variable conditionally defines the
HAS_STRLCPYsymbol, which indicates to the C program that the strlcpy () routine is available.d_strtodFrom d_strtod.U:
This variable conditionally defines the
HAS_STRTODsymbol, which indicates to the C program that the strtod() routine is available to provide better numeric string conversion than atof().d_strtolFrom d_strtol.U:
This variable conditionally defines the
HAS_STRTOLsymbol, which indicates to the C program that the strtol() routine is available to provide better numeric string conversion than atoi() and friends.d_strtoldFrom d_strtold.U:
This variable conditionally defines the
HAS_STRTOLDsymbol, which indicates to the C program that the strtold() routine is available.d_strtollFrom d_strtoll.U:
This variable conditionally defines the
HAS_STRTOLLsymbol, which indicates to the C program that the strtoll() routine is available.d_strtoqFrom d_strtoq.U:
This variable conditionally defines the
HAS_STRTOQsymbol, which indicates to the C program that the strtoq() routine is available.d_strtoulFrom d_strtoul.U:
This variable conditionally defines the
HAS_STRTOULsymbol, which indicates to the C program that the strtoul() routine is available to provide conversion of strings to unsigned long.d_strtoullFrom d_strtoull.U:
This variable conditionally defines the
HAS_STRTOULLsymbol, which indicates to the C program that the strtoull() routine is available.d_strtouqFrom d_strtouq.U:
This variable conditionally defines the
HAS_STRTOUQsymbol, which indicates to the C program that the strtouq() routine is available.d_strxfrmFrom d_strxfrm.U:
This variable conditionally defines
HAS_STRXFRMif strxfrm() is available to transform strings.d_suidsafeFrom d_dosuid.U:
This variable conditionally defines
SETUID_SCRIPTS_ARE_SECURE_NOWif setuid scripts can be secure. This test looks in /dev/fd/.d_symlinkFrom d_symlink.U:
This variable conditionally defines the
HAS_SYMLINKsymbol, which indicates to the C program that the symlink() routine is available to create symbolic links.d_syscallFrom d_syscall.U:
This variable conditionally defines
HAS_SYSCALLif syscall() is available call arbitrary system calls.d_syscallprotoFrom d_syscallproto.U:
This variable conditionally defines the
HAS_SYSCALL_PROTOsymbol, which indicates to the C program that the system provides a prototype for the syscall() function. Otherwise, it is up to the program to supply one.d_sysconfFrom d_sysconf.U:
This variable conditionally defines the
HAS_SYSCONFsymbol, which indicates to the C program that the sysconf() routine is available to determine system related limits and options.d_sysernlstFrom d_strerror.U:
This variable conditionally defines
HAS_SYS_ERRNOLISTif sys_errnolist[] is available to translate error numbers to the symbolic name.d_syserrlstFrom d_strerror.U:
This variable conditionally defines
HAS_SYS_ERRLISTif sys_errlist[] is available to translate error numbers to strings.d_systemFrom d_system.U:
This variable conditionally defines
HAS_SYSTEMif system() is available to issue a shell command.d_tcgetpgrpFrom d_tcgtpgrp.U:
This variable conditionally defines the
HAS_TCGETPGRPsymbol, which indicates to the C program that the tcgetpgrp() routine is available. to get foreground process groupID.d_tcsetpgrpFrom d_tcstpgrp.U:
This variable conditionally defines the
HAS_TCSETPGRPsymbol, which indicates to the C program that the tcsetpgrp() routine is available to set foreground process groupID.d_telldirFrom d_readdir.U:
This variable conditionally defines
HAS_TELLDIRif telldir() is available.d_telldirprotoFrom d_telldirproto.U:
This variable conditionally defines the
HAS_TELLDIR_PROTOsymbol, which indicates to the C program that the system provides a prototype for the telldir() function. Otherwise, it is up to the program to supply one.d_timeFrom d_time.U:
This variable conditionally defines the
HAS_TIMEsymbol, which indicates that the time() routine exists. The time() routine is normaly provided onUNIXsystems.d_timesFrom d_times.U:
This variable conditionally defines the
HAS_TIMESsymbol, which indicates that the times() routine exists. The times() routine is normaly provided onUNIXsystems. You may have to include <sys/times.h>.d_tm_tm_gmtoffFrom i_time.U:
This variable conditionally defines
HAS_TM_TM_GMTOFF, which indicates indicates to the C program that the struct tm has the tm_gmtoff field.d_tm_tm_zoneFrom i_time.U:
This variable conditionally defines
HAS_TM_TM_ZONE, which indicates indicates to the C program that the struct tm has the tm_zone field.d_tmpnam_rFrom d_tmpnam_r.U:
This variable conditionally defines the
HAS_TMPNAM_Rsymbol, which indicates to the C program that the tmpnam_r() routine is available.d_truncateFrom d_truncate.U:
This variable conditionally defines
HAS_TRUNCATEif truncate() is available to truncate files.d_ttyname_rFrom d_ttyname_r.U:
This variable conditionally defines the
HAS_TTYNAME_Rsymbol, which indicates to the C program that the ttyname_r() routine is available.d_tznameFrom d_tzname.U:
This variable conditionally defines
HAS_TZNAMEif tzname[] is available to access timezone names.d_u32alignFrom d_u32align.U:
This variable tells whether you must access character data through U32-aligned pointers.
d_ualarmFrom d_ualarm.U:
This variable conditionally defines the
HAS_UALARMsymbol, which indicates to the C program that the ualarm() routine is available.d_umaskFrom d_umask.U:
This variable conditionally defines the
HAS_UMASKsymbol, which indicates to the C program that the umask() routine is available. to set and get the value of the file creation mask.d_unameFrom d_gethname.U:
This variable conditionally defines the
HAS_UNAMEsymbol, which indicates to the C program that the uname() routine may be used to derive the host name.d_union_semunFrom d_union_semun.U:
This variable conditionally defines
HAS_UNION_SEMUNif the union semun is defined by including <sys/sem.h>.d_unorderedFrom d_unordered.U:
This variable conditionally defines the
HAS_UNORDEREDsymbol, which indicates to the C program that the unordered() routine is available.d_unsetenvFrom d_unsetenv.U:
This variable conditionally defines the
HAS_UNSETENVsymbol, which indicates to the C program that the unsetenv () routine is available.d_usleepFrom d_usleep.U:
This variable conditionally defines
HAS_USLEEPif usleep() is available to do high granularity sleeps.d_usleepprotoFrom d_usleepproto.U:
This variable conditionally defines the
HAS_USLEEP_PROTOsymbol, which indicates to the C program that the system provides a prototype for the usleep() function. Otherwise, it is up to the program to supply one.d_ustatFrom d_ustat.U:
This variable conditionally defines
HAS_USTATif ustat() is available to query file system statistics by dev_t.d_vendorarchFrom vendorarch.U:
This variable conditionally defined
PERL_VENDORARCH.d_vendorbinFrom vendorbin.U:
This variable conditionally defines
PERL_VENDORBIN.d_vendorlibFrom vendorlib.U:
This variable conditionally defines
PERL_VENDORLIB.d_vendorscriptFrom vendorscript.U:
This variable conditionally defines
PERL_VENDORSCRIPT.d_vforkFrom d_vfork.U:
This variable conditionally defines the
HAS_VFORKsymbol, which indicates the vfork() routine is available.d_void_closedirFrom d_closedir.U:
This variable conditionally defines
VOID_CLOSEDIRif closedir() does not return a value.d_voidsigFrom d_voidsig.U:
This variable conditionally defines
VOIDSIGif this system declares "void (*signal(...))()" in signal.h. The old way was to declare it as "int (*signal(...))()".d_voidttyFrom i_sysioctl.U:
This variable conditionally defines
USE_IOCNOTTYto indicate that the ioctl() call withTIOCNOTTYshould be used to void tty association. Otherwise (onUSGprobably), it is enough to close the standard file decriptors and do a setpgrp().d_volatileFrom d_volatile.U:
This variable conditionally defines the
HASVOLATILEsymbol, which indicates to the C program that this C compiler knows about the volatile declaration.d_vprintfFrom d_vprintf.U:
This variable conditionally defines the
HAS_VPRINTFsymbol, which indicates to the C program that the vprintf() routine is available to printf with a pointer to an argument list.d_vsnprintfFrom d_snprintf.U:
This variable conditionally defines the
HAS_VSNPRINTFsymbol, which indicates to the C program that the vsnprintf () library function is available.d_wait4From d_wait4.U:
This variable conditionally defines the HAS_WAIT4 symbol, which indicates the wait4() routine is available.
d_waitpidFrom d_waitpid.U:
This variable conditionally defines
HAS_WAITPIDif waitpid() is available to wait for child process.d_wcstombsFrom d_wcstombs.U:
This variable conditionally defines the
HAS_WCSTOMBSsymbol, which indicates to the C program that the wcstombs() routine is available to convert wide character strings to multibyte strings.d_wctombFrom d_wctomb.U:
This variable conditionally defines the
HAS_WCTOMBsymbol, which indicates to the C program that the wctomb() routine is available to convert a wide character to a multibyte.d_writevFrom d_writev.U:
This variable conditionally defines the
HAS_WRITEVsymbol, which indicates to the C program that the writev() routine is available.d_xenixFrom Guess.U:
This variable conditionally defines the symbol
XENIX, which alerts the C program that it runs under Xenix.dateFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the date program. After Configure runs, the value is reset to a plain
dateand is not useful.db_hashtypeFrom i_db.U:
This variable contains the type of the hash structure element in the <db.h> header file. In older versions of
DB, it was int, while in newer ones it is u_int32_t.db_prefixtypeFrom i_db.U:
This variable contains the type of the prefix structure element in the <db.h> header file. In older versions of
DB, it was int, while in newer ones it is size_t.db_version_majorFrom i_db.U:
This variable contains the major version number of Berkeley
DBfound in the <db.h> header file.db_version_minorFrom i_db.U:
This variable contains the minor version number of Berkeley
DBfound in the <db.h> header file. ForDBversion 1 this is always 0.db_version_patchFrom i_db.U:
This variable contains the patch version number of Berkeley
DBfound in the <db.h> header file. ForDBversion 1 this is always 0.defvoidusedFrom voidflags.U:
This variable contains the default value of the
VOIDUSEDsymbol (15).direntrytypeFrom i_dirent.U:
This symbol is set to
struct directorstruct direntdepending on whether dirent is available or not. You should use this pseudo type to portably declare your directory entries.dlextFrom dlext.U:
This variable contains the extension that is to be used for the dynamically loaded modules that perl generaties.
dlsrcFrom dlsrc.U:
This variable contains the name of the dynamic loading file that will be used with the package.
doublesizeFrom doublesize.U:
This variable contains the value of the
DOUBLESIZEsymbol, which indicates to the C program how many bytes there are in a double.drand01From randfunc.U:
Indicates the macro to be used to generate normalized random numbers. Uses randfunc, often divided by (double) (((unsigned long) 1 << randbits)) in order to normalize the result. In C programs, the macro
Drand01is mapped to drand01.drand48_r_protoFrom d_drand48_r.U:
This variable encodes the prototype of drand48_r. It is zero if d_drand48_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_drand48_r is defined.dynamic_extFrom Extensions.U:
This variable holds a list of
XSextension files we want to link dynamically into the package. It is used by Makefile.
e
eagainFrom nblock_io.U:
This variable bears the symbolic errno code set by read() when no data is present on the file and non-blocking I/O was enabled (otherwise, read() blocks naturally).
ebcdicFrom ebcdic.U:
This variable conditionally defines
EBCDICif this system usesEBCDICencoding. Among other things, this means that the character ranges are not contiguous. See trnl.UechoFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the echo program. After Configure runs, the value is reset to a plain
echoand is not useful.egrepFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the egrep program. After Configure runs, the value is reset to a plain
egrepand is not useful.emacsFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
endgrent_r_protoFrom d_endgrent_r.U:
This variable encodes the prototype of endgrent_r. It is zero if d_endgrent_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_endgrent_r is defined.endhostent_r_protoFrom d_endhostent_r.U:
This variable encodes the prototype of endhostent_r. It is zero if d_endhostent_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_endhostent_r is defined.endnetent_r_protoFrom d_endnetent_r.U:
This variable encodes the prototype of endnetent_r. It is zero if d_endnetent_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_endnetent_r is defined.endprotoent_r_protoFrom d_endprotoent_r.U:
This variable encodes the prototype of endprotoent_r. It is zero if d_endprotoent_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_endprotoent_r is defined.endpwent_r_protoFrom d_endpwent_r.U:
This variable encodes the prototype of endpwent_r. It is zero if d_endpwent_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_endpwent_r is defined.endservent_r_protoFrom d_endservent_r.U:
This variable encodes the prototype of endservent_r. It is zero if d_endservent_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_endservent_r is defined.eunicefixFrom Init.U:
When running under Eunice this variable contains a command which will convert a shell script to the proper form of text file for it to be executable by the shell. On other systems it is a no-op.
exe_extFrom Unix.U:
This is an old synonym for _exe.
exprFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the expr program. After Configure runs, the value is reset to a plain
exprand is not useful.extensionsFrom Extensions.U:
This variable holds a list of all extension files (both
XSand non-xs linked into the package. It is propagated to Config.pm and is typically used to test whether a particular extesion is available.extrasFrom Extras.U:
This variable holds a list of extra modules to install.
f
fflushallFrom fflushall.U:
This symbol, if defined, tells that to flush all pending stdio output one must loop through all the stdio file handles stored in an array and fflush them. Note that if fflushNULL is defined, fflushall will not even be probed for and will be left undefined.
fflushNULLFrom fflushall.U:
This symbol, if defined, tells that fflush(
NULL) does flush all pending stdio output.findFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
firstmakefileFrom Unix.U:
This variable defines the first file searched by make. On unix, it is makefile (then Makefile). On case-insensitive systems, it might be something else. This is only used to deal with convoluted make depend tricks.
flexFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
fpossizeFrom fpossize.U:
This variable contains the size of a fpostype in bytes.
fpostypeFrom fpostype.U:
This variable defines Fpos_t to be something like fpos_t, long, uint, or whatever type is used to declare file positions in libc.
freetypeFrom mallocsrc.U:
This variable contains the return type of free(). It is usually void, but occasionally int.
fromFrom Cross.U:
This variable contains the command used by Configure to copy files from the target host. Useful and available only during Perl build. The string
:if not cross-compiling.full_arFrom Loc_ar.U:
This variable contains the full pathname to
ar, whether or not the user has specifiedportability. This is only used in the Makefile.SH.full_cshFrom d_csh.U:
This variable contains the full pathname to
csh, whether or not the user has specifiedportability. This is only used in the compiled C program, and we assume that all systems which can share this executable will have the same full pathname to csh.full_sedFrom Loc_sed.U:
This variable contains the full pathname to
sed, whether or not the user has specifiedportability. This is only used in the compiled C program, and we assume that all systems which can share this executable will have the same full pathname to sed.
g
gccansipedanticFrom gccvers.U:
If
GNUcc (gcc) is used, this variable will enable (if set) the -ansi and -pedantic ccflags for building core files (through cflags script). (See Porting/pumpkin.pod for full description).gccosandversFrom gccvers.U:
If
GNUcc (gcc) is used, this variable holds the operating system and version used to compile gcc. It is set to '' if not gcc, or if nothing useful can be parsed as the os version.gccversionFrom gccvers.U:
If
GNUcc (gcc) is used, this variable holds1or2to indicate whether the compiler is version 1 or 2. This is used in setting some of the default cflags. It is set to '' if not gcc.getgrent_r_protoFrom d_getgrent_r.U:
This variable encodes the prototype of getgrent_r. It is zero if d_getgrent_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_getgrent_r is defined.getgrgid_r_protoFrom d_getgrgid_r.U:
This variable encodes the prototype of getgrgid_r. It is zero if d_getgrgid_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_getgrgid_r is defined.getgrnam_r_protoFrom d_getgrnam_r.U:
This variable encodes the prototype of getgrnam_r. It is zero if d_getgrnam_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_getgrnam_r is defined.gethostbyaddr_r_protoFrom d_gethostbyaddr_r.U:
This variable encodes the prototype of gethostbyaddr_r. It is zero if d_gethostbyaddr_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_gethostbyaddr_r is defined.gethostbyname_r_protoFrom d_gethostbyname_r.U:
This variable encodes the prototype of gethostbyname_r. It is zero if d_gethostbyname_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_gethostbyname_r is defined.gethostent_r_protoFrom d_gethostent_r.U:
This variable encodes the prototype of gethostent_r. It is zero if d_gethostent_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_gethostent_r is defined.getlogin_r_protoFrom d_getlogin_r.U:
This variable encodes the prototype of getlogin_r. It is zero if d_getlogin_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_getlogin_r is defined.getnetbyaddr_r_protoFrom d_getnetbyaddr_r.U:
This variable encodes the prototype of getnetbyaddr_r. It is zero if d_getnetbyaddr_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_getnetbyaddr_r is defined.getnetbyname_r_protoFrom d_getnetbyname_r.U:
This variable encodes the prototype of getnetbyname_r. It is zero if d_getnetbyname_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_getnetbyname_r is defined.getnetent_r_protoFrom d_getnetent_r.U:
This variable encodes the prototype of getnetent_r. It is zero if d_getnetent_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_getnetent_r is defined.getprotobyname_r_protoFrom d_getprotobyname_r.U:
This variable encodes the prototype of getprotobyname_r. It is zero if d_getprotobyname_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_getprotobyname_r is defined.getprotobynumber_r_protoFrom d_getprotobynumber_r.U:
This variable encodes the prototype of getprotobynumber_r. It is zero if d_getprotobynumber_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_getprotobynumber_r is defined.getprotoent_r_protoFrom d_getprotoent_r.U:
This variable encodes the prototype of getprotoent_r. It is zero if d_getprotoent_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_getprotoent_r is defined.getpwent_r_protoFrom d_getpwent_r.U:
This variable encodes the prototype of getpwent_r. It is zero if d_getpwent_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_getpwent_r is defined.getpwnam_r_protoFrom d_getpwnam_r.U:
This variable encodes the prototype of getpwnam_r. It is zero if d_getpwnam_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_getpwnam_r is defined.getpwuid_r_protoFrom d_getpwuid_r.U:
This variable encodes the prototype of getpwuid_r. It is zero if d_getpwuid_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_getpwuid_r is defined.getservbyname_r_protoFrom d_getservbyname_r.U:
This variable encodes the prototype of getservbyname_r. It is zero if d_getservbyname_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_getservbyname_r is defined.getservbyport_r_protoFrom d_getservbyport_r.U:
This variable encodes the prototype of getservbyport_r. It is zero if d_getservbyport_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_getservbyport_r is defined.getservent_r_protoFrom d_getservent_r.U:
This variable encodes the prototype of getservent_r. It is zero if d_getservent_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_getservent_r is defined.getspnam_r_protoFrom d_getspnam_r.U:
This variable encodes the prototype of getspnam_r. It is zero if d_getspnam_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_getspnam_r is defined.gidformatFrom gidf.U:
This variable contains the format string used for printing a Gid_t.
gidsignFrom gidsign.U:
This variable contains the signedness of a gidtype. 1 for unsigned, -1 for signed.
gidsizeFrom gidsize.U:
This variable contains the size of a gidtype in bytes.
gidtypeFrom gidtype.U:
This variable defines Gid_t to be something like gid_t, int, ushort, or whatever type is used to declare the return type of getgid(). Typically, it is the type of group ids in the kernel.
glibpthFrom libpth.U:
This variable holds the general path (space-separated) used to find libraries. It may contain directories that do not exist on this platform, libpth is the cleaned-up version.
gmakeFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the gmake program. After Configure runs, the value is reset to a plain
gmakeand is not useful.gmtime_r_protoFrom d_gmtime_r.U:
This variable encodes the prototype of gmtime_r. It is zero if d_gmtime_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_gmtime_r is defined.gnulibc_versionFrom d_gnulibc.U:
This variable contains the version number of the
GNUC library. It is usually something like 2.2.5. It is a plain '' if this is not theGNUC library, or if the version is unknown.grepFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the grep program. After Configure runs, the value is reset to a plain
grepand is not useful.groupcatFrom nis.U:
This variable contains a command that produces the text of the /etc/group file. This is normally "cat /etc/group", but can be "ypcat group" when
NISis used. On some systems, such as os390, there may be no equivalent command, in which case this variable is unset.groupstypeFrom groupstype.U:
This variable defines Groups_t to be something like gid_t, int, ushort, or whatever type is used for the second argument to getgroups() and setgroups(). Usually, this is the same as gidtype (gid_t), but sometimes it isn't.
gzipFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the gzip program. After Configure runs, the value is reset to a plain
gzipand is not useful.
h
h_fcntlFrom h_fcntl.U:
This is variable gets set in various places to tell i_fcntl that <fcntl.h> should be included.
h_sysfileFrom h_sysfile.U:
This is variable gets set in various places to tell i_sys_file that <sys/file.h> should be included.
hintFrom Oldconfig.U:
Gives the type of hints used for previous answers. May be one of
default,recommendedorprevious.hostcatFrom nis.U:
This variable contains a command that produces the text of the /etc/hosts file. This is normally "cat /etc/hosts", but can be "ypcat hosts" when
NISis used. On some systems, such as os390, there may be no equivalent command, in which case this variable is unset.html1dirFrom html1dir.U:
This variable contains the name of the directory in which html source pages are to be put. This directory is for pages that describe whole programs, not libraries or modules. It is intended to correspond roughly to section 1 of the Unix manuals.
html1direxpFrom html1dir.U:
This variable is the same as the html1dir variable, but is filename expanded at configuration time, for convenient use in makefiles.
html3dirFrom html3dir.U:
This variable contains the name of the directory in which html source pages are to be put. This directory is for pages that describe libraries or modules. It is intended to correspond roughly to section 3 of the Unix manuals.
html3direxpFrom html3dir.U:
This variable is the same as the html3dir variable, but is filename expanded at configuration time, for convenient use in makefiles.
i
i16sizeFrom perlxv.U:
This variable is the size of an I16 in bytes.
i16typeFrom perlxv.U:
This variable contains the C type used for Perl's I16.
i32sizeFrom perlxv.U:
This variable is the size of an I32 in bytes.
i32typeFrom perlxv.U:
This variable contains the C type used for Perl's I32.
i64sizeFrom perlxv.U:
This variable is the size of an I64 in bytes.
i64typeFrom perlxv.U:
This variable contains the C type used for Perl's I64.
i8sizeFrom perlxv.U:
This variable is the size of an I8 in bytes.
i8typeFrom perlxv.U:
This variable contains the C type used for Perl's I8.
i_arpainetFrom i_arpainet.U:
This variable conditionally defines the
I_ARPA_INETsymbol, and indicates whether a C program should include <arpa/inet.h>.i_bsdioctlFrom i_sysioctl.U:
This variable conditionally defines the
I_SYS_BSDIOCTLsymbol, which indicates to the C program that <sys/bsdioctl.h> exists and should be included.i_cryptFrom i_crypt.U:
This variable conditionally defines the
I_CRYPTsymbol, and indicates whether a C program should include <crypt.h>.i_dbFrom i_db.U:
This variable conditionally defines the
I_DBsymbol, and indicates whether a C program may include Berkeley'sDBinclude file <db.h>.i_dbmFrom i_dbm.U:
This variable conditionally defines the
I_DBMsymbol, which indicates to the C program that <dbm.h> exists and should be included.i_direntFrom i_dirent.U:
This variable conditionally defines
I_DIRENT, which indicates to the C program that it should include <dirent.h>.i_dldFrom i_dld.U:
This variable conditionally defines the
I_DLDsymbol, which indicates to the C program that <dld.h> (GNUdynamic loading) exists and should be included.i_dlfcnFrom i_dlfcn.U:
This variable conditionally defines the
I_DLFCNsymbol, which indicates to the C program that <dlfcn.h> exists and should be included.i_fcntlFrom i_fcntl.U:
This variable controls the value of
I_FCNTL(which tells the C program to include <fcntl.h>).i_floatFrom i_float.U:
This variable conditionally defines the
I_FLOATsymbol, and indicates whether a C program may include <float.h> to get symbols likeDBL_MAXorDBL_MIN, i.e. machine dependent floating point values.i_fpFrom i_fp.U:
This variable conditionally defines the
I_FPsymbol, and indicates whether a C program should include <fp.h>.i_fp_classFrom i_fp_class.U:
This variable conditionally defines the
I_FP_CLASSsymbol, and indicates whether a C program should include <fp_class.h>.i_gdbmFrom i_gdbm.U:
This variable conditionally defines the
I_GDBMsymbol, which indicates to the C program that <gdbm.h> exists and should be included.i_grpFrom i_grp.U:
This variable conditionally defines the
I_GRPsymbol, and indicates whether a C program should include <grp.h>.i_ieeefpFrom i_ieeefp.U:
This variable conditionally defines the
I_IEEEFPsymbol, and indicates whether a C program should include <ieeefp.h>.i_inttypesFrom i_inttypes.U:
This variable conditionally defines the
I_INTTYPESsymbol, and indicates whether a C program should include <inttypes.h>.i_langinfoFrom i_langinfo.U:
This variable conditionally defines the
I_LANGINFOsymbol, and indicates whether a C program should include <langinfo.h>.i_libutilFrom i_libutil.U:
This variable conditionally defines the
I_LIBUTILsymbol, and indicates whether a C program should include <libutil.h>.i_limitsFrom i_limits.U:
This variable conditionally defines the
I_LIMITSsymbol, and indicates whether a C program may include <limits.h> to get symbols likeWORD_BITand friends.i_localeFrom i_locale.U:
This variable conditionally defines the
I_LOCALEsymbol, and indicates whether a C program should include <locale.h>.i_machcthrFrom i_machcthr.U:
This variable conditionally defines the
I_MACH_CTHREADSsymbol, and indicates whether a C program should include <mach/cthreads.h>.i_mallocFrom i_malloc.U:
This variable conditionally defines the
I_MALLOCsymbol, and indicates whether a C program should include <malloc.h>.i_mathFrom i_math.U:
This variable conditionally defines the
I_MATHsymbol, and indicates whether a C program may include <math.h>.i_memoryFrom i_memory.U:
This variable conditionally defines the
I_MEMORYsymbol, and indicates whether a C program should include <memory.h>.i_mntentFrom i_mntent.U:
This variable conditionally defines the
I_MNTENTsymbol, and indicates whether a C program should include <mntent.h>.i_ndbmFrom i_ndbm.U:
This variable conditionally defines the
I_NDBMsymbol, which indicates to the C program that <ndbm.h> exists and should be included.i_netdbFrom i_netdb.U:
This variable conditionally defines the
I_NETDBsymbol, and indicates whether a C program should include <netdb.h>.i_neterrnoFrom i_neterrno.U:
This variable conditionally defines the
I_NET_ERRNOsymbol, which indicates to the C program that <net/errno.h> exists and should be included.i_netinettcpFrom i_netinettcp.U:
This variable conditionally defines the
I_NETINET_TCPsymbol, and indicates whether a C program should include <netinet/tcp.h>.i_niinFrom i_niin.U:
This variable conditionally defines
I_NETINET_IN, which indicates to the C program that it should include <netinet/in.h>. Otherwise, you may try <sys/in.h>.i_pollFrom i_poll.U:
This variable conditionally defines the
I_POLLsymbol, and indicates whether a C program should include <poll.h>.i_protFrom i_prot.U:
This variable conditionally defines the
I_PROTsymbol, and indicates whether a C program should include <prot.h>.i_pthreadFrom i_pthread.U:
This variable conditionally defines the
I_PTHREADsymbol, and indicates whether a C program should include <pthread.h>.i_pwdFrom i_pwd.U:
This variable conditionally defines
I_PWD, which indicates to the C program that it should include <pwd.h>.i_rpcsvcdbmFrom i_dbm.U:
This variable conditionally defines the
I_RPCSVC_DBMsymbol, which indicates to the C program that <rpcsvc/dbm.h> exists and should be included. Some System V systems might need this instead of <dbm.h>.i_sfioFrom i_sfio.U:
This variable conditionally defines the
I_SFIOsymbol, and indicates whether a C program should include <sfio.h>.i_sgttyFrom i_termio.U:
This variable conditionally defines the
I_SGTTYsymbol, which indicates to the C program that it should include <sgtty.h> rather than <termio.h>.i_shadowFrom i_shadow.U:
This variable conditionally defines the
I_SHADOWsymbol, and indicates whether a C program should include <shadow.h>.i_socksFrom i_socks.U:
This variable conditionally defines the
I_SOCKSsymbol, and indicates whether a C program should include <socks.h>.i_stdargFrom i_varhdr.U:
This variable conditionally defines the
I_STDARGsymbol, which indicates to the C program that <stdarg.h> exists and should be included.i_stddefFrom i_stddef.U:
This variable conditionally defines the
I_STDDEFsymbol, which indicates to the C program that <stddef.h> exists and should be included.i_stdlibFrom i_stdlib.U:
This variable conditionally defines the
I_STDLIBsymbol, which indicates to the C program that <stdlib.h> exists and should be included.i_stringFrom i_string.U:
This variable conditionally defines the
I_STRINGsymbol, which indicates that <string.h> should be included rather than <strings.h>.i_sunmathFrom i_sunmath.U:
This variable conditionally defines the
I_SUNMATHsymbol, and indicates whether a C program should include <sunmath.h>.i_sysaccessFrom i_sysaccess.U:
This variable conditionally defines the
I_SYS_ACCESSsymbol, and indicates whether a C program should include <sys/access.h>.i_sysdirFrom i_sysdir.U:
This variable conditionally defines the
I_SYS_DIRsymbol, and indicates whether a C program should include <sys/dir.h>.i_sysfileFrom i_sysfile.U:
This variable conditionally defines the
I_SYS_FILEsymbol, and indicates whether a C program should include <sys/file.h> to getR_OKand friends.i_sysfilioFrom i_sysioctl.U:
This variable conditionally defines the
I_SYS_FILIOsymbol, which indicates to the C program that <sys/filio.h> exists and should be included in preference to <sys/ioctl.h>.i_sysinFrom i_niin.U:
This variable conditionally defines
I_SYS_IN, which indicates to the C program that it should include <sys/in.h> instead of <netinet/in.h>.i_sysioctlFrom i_sysioctl.U:
This variable conditionally defines the
I_SYS_IOCTLsymbol, which indicates to the C program that <sys/ioctl.h> exists and should be included.i_syslogFrom i_syslog.U:
This variable conditionally defines the
I_SYSLOGsymbol, and indicates whether a C program should include <syslog.h>.i_sysmmanFrom i_sysmman.U:
This variable conditionally defines the
I_SYS_MMANsymbol, and indicates whether a C program should include <sys/mman.h>.i_sysmodeFrom i_sysmode.U:
This variable conditionally defines the
I_SYSMODEsymbol, and indicates whether a C program should include <sys/mode.h>.i_sysmountFrom i_sysmount.U:
This variable conditionally defines the
I_SYSMOUNTsymbol, and indicates whether a C program should include <sys/mount.h>.i_sysndirFrom i_sysndir.U:
This variable conditionally defines the
I_SYS_NDIRsymbol, and indicates whether a C program should include <sys/ndir.h>.i_sysparamFrom i_sysparam.U:
This variable conditionally defines the
I_SYS_PARAMsymbol, and indicates whether a C program should include <sys/param.h>.i_sysresrcFrom i_sysresrc.U:
This variable conditionally defines the
I_SYS_RESOURCEsymbol, and indicates whether a C program should include <sys/resource.h>.i_syssecrtFrom i_syssecrt.U:
This variable conditionally defines the
I_SYS_SECURITYsymbol, and indicates whether a C program should include <sys/security.h>.i_sysselctFrom i_sysselct.U:
This variable conditionally defines
I_SYS_SELECT, which indicates to the C program that it should include <sys/select.h> in order to get the definition of struct timeval.i_syssockioFrom i_sysioctl.U:
This variable conditionally defines
I_SYS_SOCKIOto indicate to the C program that socket ioctl codes may be found in <sys/sockio.h> instead of <sys/ioctl.h>.i_sysstatFrom i_sysstat.U:
This variable conditionally defines the
I_SYS_STATsymbol, and indicates whether a C program should include <sys/stat.h>.i_sysstatfsFrom i_sysstatfs.U:
This variable conditionally defines the
I_SYSSTATFSsymbol, and indicates whether a C program should include <sys/statfs.h>.i_sysstatvfsFrom i_sysstatvfs.U:
This variable conditionally defines the
I_SYSSTATVFSsymbol, and indicates whether a C program should include <sys/statvfs.h>.i_systimeFrom i_time.U:
This variable conditionally defines
I_SYS_TIME, which indicates to the C program that it should include <sys/time.h>.i_systimekFrom i_time.U:
This variable conditionally defines
I_SYS_TIME_KERNEL, which indicates to the C program that it should include <sys/time.h> withKERNELdefined.i_systimesFrom i_systimes.U:
This variable conditionally defines the
I_SYS_TIMESsymbol, and indicates whether a C program should include <sys/times.h>.i_systypesFrom i_systypes.U:
This variable conditionally defines the
I_SYS_TYPESsymbol, and indicates whether a C program should include <sys/types.h>.i_sysuioFrom i_sysuio.U:
This variable conditionally defines the
I_SYSUIOsymbol, and indicates whether a C program should include <sys/uio.h>.i_sysunFrom i_sysun.U:
This variable conditionally defines
I_SYS_UN, which indicates to the C program that it should include <sys/un.h> to getUNIXdomain socket definitions.i_sysutsnameFrom i_sysutsname.U:
This variable conditionally defines the
I_SYSUTSNAMEsymbol, and indicates whether a C program should include <sys/utsname.h>.i_sysvfsFrom i_sysvfs.U:
This variable conditionally defines the
I_SYSVFSsymbol, and indicates whether a C program should include <sys/vfs.h>.i_syswaitFrom i_syswait.U:
This variable conditionally defines
I_SYS_WAIT, which indicates to the C program that it should include <sys/wait.h>.i_termioFrom i_termio.U:
This variable conditionally defines the
I_TERMIOsymbol, which indicates to the C program that it should include <termio.h> rather than <sgtty.h>.i_termiosFrom i_termio.U:
This variable conditionally defines the
I_TERMIOSsymbol, which indicates to the C program that thePOSIX<termios.h> file is to be included.i_timeFrom i_time.U:
This variable conditionally defines
I_TIME, which indicates to the C program that it should include <time.h>.i_unistdFrom i_unistd.U:
This variable conditionally defines the
I_UNISTDsymbol, and indicates whether a C program should include <unistd.h>.i_ustatFrom i_ustat.U:
This variable conditionally defines the
I_USTATsymbol, and indicates whether a C program should include <ustat.h>.i_utimeFrom i_utime.U:
This variable conditionally defines the
I_UTIMEsymbol, and indicates whether a C program should include <utime.h>.i_valuesFrom i_values.U:
This variable conditionally defines the
I_VALUESsymbol, and indicates whether a C program may include <values.h> to get symbols likeMAXLONGand friends.i_varargsFrom i_varhdr.U:
This variable conditionally defines
I_VARARGS, which indicates to the C program that it should include <varargs.h>.i_varhdrFrom i_varhdr.U:
Contains the name of the header to be included to get va_dcl definition. Typically one of varargs.h or stdarg.h.
i_vforkFrom i_vfork.U:
This variable conditionally defines the
I_VFORKsymbol, and indicates whether a C program should include vfork.h.ignore_versioned_solibsFrom libs.U:
This variable should be non-empty if non-versioned shared libraries (libfoo.so.x.y) are to be ignored (because they cannot be linked against).
inc_version_listFrom inc_version_list.U:
This variable specifies the list of subdirectories in over which perl.c:incpush() and lib/lib.pm will automatically search when adding directories to @
INC. The elements in the list are separated by spaces. This is only useful if you have a perl library directory tree structured like the default one. SeeINSTALLfor how this works. The versioned site_perl directory was introduced in 5.005, so that is the lowest possible value.This list includes architecture-dependent directories back to version $api_versionstring (e.g. 5.5.640) and architecture-independent directories all the way back to 5.005.
inc_version_list_initFrom inc_version_list.U:
This variable holds the same list as inc_version_list, but each item is enclosed in double quotes and separated by commas, suitable for use in the
PERL_INC_VERSION_LISTinitialization.incpathFrom usrinc.U:
This variable must preceed the normal include path to get hte right one, as in $incpath/usr/include or $incpath/usr/lib. Value can be "" or /bsd43 on mips.
inewsFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
initialinstalllocationFrom bin.U:
When userelocatableinc is true, this variable holds the location that make install should copy the perl binary to, with all the run-time relocatable paths calculated from this at install time. When used, it is initialised to the original value of binexp, and then binexp is set to .../, as the other binaries are found relative to the perl binary.
installarchlibFrom archlib.U:
This variable is really the same as archlibexp but may differ on those systems using
AFS. For extra portability, only this variable should be used in makefiles.installbinFrom bin.U:
This variable is the same as binexp unless
AFSis running in which case the user is explicitely prompted for it. This variable should always be used in your makefiles for maximum portability.installhtml1dirFrom html1dir.U:
This variable is really the same as html1direxp, unless you are using a different installprefix. For extra portability, you should only use this variable within your makefiles.
installhtml3dirFrom html3dir.U:
This variable is really the same as html3direxp, unless you are using a different installprefix. For extra portability, you should only use this variable within your makefiles.
installman1dirFrom man1dir.U:
This variable is really the same as man1direxp, unless you are using
AFSin which case it points to the read/write location whereas man1direxp only points to the read-only access location. For extra portability, you should only use this variable within your makefiles.installman3dirFrom man3dir.U:
This variable is really the same as man3direxp, unless you are using
AFSin which case it points to the read/write location whereas man3direxp only points to the read-only access location. For extra portability, you should only use this variable within your makefiles.installprefixFrom installprefix.U:
This variable holds the name of the directory below which "make install" will install the package. For most users, this is the same as prefix. However, it is useful for installing the software into a different (usually temporary) location after which it can be bundled up and moved somehow to the final location specified by prefix.
installprefixexpFrom installprefix.U:
This variable holds the full absolute path of installprefix with all ~-expansion done.
installprivlibFrom privlib.U:
This variable is really the same as privlibexp but may differ on those systems using
AFS. For extra portability, only this variable should be used in makefiles.installscriptFrom scriptdir.U:
This variable is usually the same as scriptdirexp, unless you are on a system running
AFS, in which case they may differ slightly. You should always use this variable within your makefiles for portability.installsitearchFrom sitearch.U:
This variable is really the same as sitearchexp but may differ on those systems using
AFS. For extra portability, only this variable should be used in makefiles.installsitebinFrom sitebin.U:
This variable is usually the same as sitebinexp, unless you are on a system running
AFS, in which case they may differ slightly. You should always use this variable within your makefiles for portability.installsitehtml1dirFrom sitehtml1dir.U:
This variable is really the same as sitehtml1direxp, unless you are using
AFSin which case it points to the read/write location whereas html1direxp only points to the read-only access location. For extra portability, you should only use this variable within your makefiles.installsitehtml3dirFrom sitehtml3dir.U:
This variable is really the same as sitehtml3direxp, unless you are using
AFSin which case it points to the read/write location whereas html3direxp only points to the read-only access location. For extra portability, you should only use this variable within your makefiles.installsitelibFrom sitelib.U:
This variable is really the same as sitelibexp but may differ on those systems using
AFS. For extra portability, only this variable should be used in makefiles.installsiteman1dirFrom siteman1dir.U:
This variable is really the same as siteman1direxp, unless you are using
AFSin which case it points to the read/write location whereas man1direxp only points to the read-only access location. For extra portability, you should only use this variable within your makefiles.installsiteman3dirFrom siteman3dir.U:
This variable is really the same as siteman3direxp, unless you are using
AFSin which case it points to the read/write location whereas man3direxp only points to the read-only access location. For extra portability, you should only use this variable within your makefiles.installsitescriptFrom sitescript.U:
This variable is usually the same as sitescriptexp, unless you are on a system running
AFS, in which case they may differ slightly. You should always use this variable within your makefiles for portability.installstyleFrom installstyle.U:
This variable describes the
styleof the perl installation. This is intended to be useful for tools that need to manipulate entire perl distributions. Perl itself doesn't use this to find its libraries -- the library directories are stored directly in Config.pm. Currently, there are only two styles:liband lib/perl5. The default library locations (e.g. privlib, sitelib) are either $prefix/lib or $prefix/lib/perl5. The former is useful if $prefix is a directory dedicated to perl (e.g. /opt/perl), while the latter is useful if $prefix is shared by many packages, e.g. if $prefix=/usr/local.Unfortunately, while this
stylevariable is used to set defaults for all three directory hierarchies (core, vendor, and site), there is no guarantee that the same style is actually appropriate for all those directories. For example, $prefix might be /opt/perl, but $siteprefix might be /usr/local. (Perhaps, in retrospect, thelibstyle should never have been supported, but it did seem like a nice idea at the time.)The situation is even less clear for tools such as MakeMaker that can be used to install additional modules into non-standard places. For example, if a user intends to install a module into a private directory (perhaps by setting
PREFIXon the Makefile.PL command line), then there is no reason to assume that the Configure-time $installstyle setting will be relevant for thatPREFIX.This may later be extended to include other information, so be careful with pattern-matching on the results.
For compatibility with perl5.005 and earlier, the default setting is based on whether or not $prefix contains the string
perl.installusrbinperlFrom instubperl.U:
This variable tells whether Perl should be installed also as /usr/bin/perl in addition to $installbin/perl
installvendorarchFrom vendorarch.U:
This variable is really the same as vendorarchexp but may differ on those systems using
AFS. For extra portability, only this variable should be used in makefiles.installvendorbinFrom vendorbin.U:
This variable is really the same as vendorbinexp but may differ on those systems using
AFS. For extra portability, only this variable should be used in makefiles.installvendorhtml1dirFrom vendorhtml1dir.U:
This variable is really the same as vendorhtml1direxp but may differ on those systems using
AFS. For extra portability, only this variable should be used in makefiles.installvendorhtml3dirFrom vendorhtml3dir.U:
This variable is really the same as vendorhtml3direxp but may differ on those systems using
AFS. For extra portability, only this variable should be used in makefiles.installvendorlibFrom vendorlib.U:
This variable is really the same as vendorlibexp but may differ on those systems using
AFS. For extra portability, only this variable should be used in makefiles.installvendorman1dirFrom vendorman1dir.U:
This variable is really the same as vendorman1direxp but may differ on those systems using
AFS. For extra portability, only this variable should be used in makefiles.installvendorman3dirFrom vendorman3dir.U:
This variable is really the same as vendorman3direxp but may differ on those systems using
AFS. For extra portability, only this variable should be used in makefiles.installvendorscriptFrom vendorscript.U:
This variable is really the same as vendorscriptexp but may differ on those systems using
AFS. For extra portability, only this variable should be used in makefiles.intsizeFrom intsize.U:
This variable contains the value of the
INTSIZEsymbol, which indicates to the C program how many bytes there are in an int.issymlinkFrom issymlink.U:
This variable holds the test command to test for a symbolic link (if they are supported). Typical values include
test -handtest -L.ivdformatFrom perlxvf.U:
This variable contains the format string used for printing a Perl
IVas a signed decimal integer.ivsizeFrom perlxv.U:
This variable is the size of an
IVin bytes.ivtypeFrom perlxv.U:
This variable contains the C type used for Perl's
IV.
k
known_extensionsFrom Extensions.U:
This variable holds a list of all
XSextensions included in the package.kshFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
l
ldFrom dlsrc.U:
This variable indicates the program to be used to link libraries for dynamic loading. On some systems, it is
ld. OnELFsystems, it should be $cc. Mostly, we'll try to respect the hint file setting.lddlflagsFrom dlsrc.U:
This variable contains any special flags that might need to be passed to $ld to create a shared library suitable for dynamic loading. It is up to the makefile to use it. For hpux, it should be
-b. For sunos 4.1, it is empty.ldflagsFrom ccflags.U:
This variable contains any additional C loader flags desired by the user. It is up to the Makefile to use this.
ldflags_uselargefilesFrom uselfs.U:
This variable contains the loader flags needed by large file builds and added to ldflags by hints files.
ldlibpthnameFrom libperl.U:
This variable holds the name of the shared library search path, often
LD_LIBRARY_PATH. To get an empty string, the hints file must set this tonone.lessFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the less program. After Configure runs, the value is reset to a plain
lessand is not useful.lib_extFrom Unix.U:
This is an old synonym for _a.
libcFrom libc.U:
This variable contains the location of the C library.
libperlFrom libperl.U:
The perl executable is obtained by linking perlmain.c with libperl, any static extensions (usually just DynaLoader), and any other libraries needed on this system. libperl is usually libperl.a, but can also be libperl.so.xxx if the user wishes to build a perl executable with a shared library.
libpthFrom libpth.U:
This variable holds the general path (space-separated) used to find libraries. It is intended to be used by other units.
libsFrom libs.U:
This variable holds the additional libraries we want to use. It is up to the Makefile to deal with it. The list can be empty.
libsdirsFrom libs.U:
This variable holds the directory names aka dirnames of the libraries we found and accepted, duplicates are removed.
libsfilesFrom libs.U:
This variable holds the filenames aka basenames of the libraries we found and accepted.
libsfoundFrom libs.U:
This variable holds the full pathnames of the libraries we found and accepted.
libspathFrom libs.U:
This variable holds the directory names probed for libraries.
libswantedFrom Myinit.U:
This variable holds a list of all the libraries we want to search. The order is chosen to pick up the c library ahead of ucb or bsd libraries for SVR4.
libswanted_uselargefilesFrom uselfs.U:
This variable contains the libraries needed by large file builds and added to ldflags by hints files. It is a space separated list of the library names without the
libprefix or any suffix, just like libswanted..lineFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
lintFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
lkflagsFrom ccflags.U:
This variable contains any additional C partial linker flags desired by the user. It is up to the Makefile to use this.
lnFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the ln program. After Configure runs, the value is reset to a plain
lnand is not useful.lnsFrom lns.U:
This variable holds the name of the command to make symbolic links (if they are supported). It can be used in the Makefile. It is either
ln -sorlnlocaltime_r_protoFrom d_localtime_r.U:
This variable encodes the prototype of localtime_r. It is zero if d_localtime_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_localtime_r is defined.locincpthFrom ccflags.U:
This variable contains a list of additional directories to be searched by the compiler. The appropriate
-Idirectives will be added to ccflags. This is intended to simplify setting local directories from the Configure command line. It's not much, but it parallels the loclibpth stuff in libpth.U.loclibpthFrom libpth.U:
This variable holds the paths (space-separated) used to find local libraries. It is prepended to libpth, and is intended to be easily set from the command line.
longdblsizeFrom d_longdbl.U:
This variable contains the value of the
LONG_DOUBLESIZEsymbol, which indicates to the C program how many bytes there are in a long double, if this system supports long doubles.longlongsizeFrom d_longlong.U:
This variable contains the value of the
LONGLONGSIZEsymbol, which indicates to the C program how many bytes there are in a long long, if this system supports long long.longsizeFrom intsize.U:
This variable contains the value of the
LONGSIZEsymbol, which indicates to the C program how many bytes there are in a long.lpFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
lprFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
lsFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the ls program. After Configure runs, the value is reset to a plain
lsand is not useful.lseeksizeFrom lseektype.U:
This variable defines lseektype to be something like off_t, long, or whatever type is used to declare lseek offset's type in the kernel (which also appears to be lseek's return type).
lseektypeFrom lseektype.U:
This variable defines lseektype to be something like off_t, long, or whatever type is used to declare lseek offset's type in the kernel (which also appears to be lseek's return type).
m
madFrom mad.U:
This variable indicates that the Misc Attribute Definition code is to be compiled.
madlyhFrom mad.U:
If the Misc Attribute Decoration is to be compiled, this variable is set to the name of the extra header files to be used, else it is ''
madlyobjFrom mad.U:
If the Misc Attribute Decoration is to be compiled, this variable is set to the name of the extra object files to be used, else it is ''
madlysrcFrom mad.U:
If the Misc Attribute Decoration is to be compiled, this variable is set to the name of the extra C source files to be used, else it is ''
mailFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
mailxFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
makeFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the make program. After Configure runs, the value is reset to a plain
makeand is not useful.make_set_makeFrom make.U:
Some versions of
makeset the variableMAKE. Others do not. This variable contains the string to be included in Makefile.SH so thatMAKEis set if needed, and not if not needed. Possible values are:make_set_make=
## If your make program handles this for you,make_set_make=
MAKE=$make# if it doesn't.This uses a comment character to distinguish a
setvalue (from a previous config.sh or Configure-Doption) from an uncomputed value.mallocobjFrom mallocsrc.U:
This variable contains the name of the malloc.o that this package generates, if that malloc.o is preferred over the system malloc. Otherwise the value is null. This variable is intended for generating Makefiles. See mallocsrc.
mallocsrcFrom mallocsrc.U:
This variable contains the name of the malloc.c that comes with the package, if that malloc.c is preferred over the system malloc. Otherwise the value is null. This variable is intended for generating Makefiles.
malloctypeFrom mallocsrc.U:
This variable contains the kind of ptr returned by malloc and realloc.
man1dirFrom man1dir.U:
This variable contains the name of the directory in which manual source pages are to be put. It is the responsibility of the Makefile.SH to get the value of this into the proper command. You must be prepared to do the ~name expansion yourself.
man1direxpFrom man1dir.U:
This variable is the same as the man1dir variable, but is filename expanded at configuration time, for convenient use in makefiles.
man1extFrom man1dir.U:
This variable contains the extension that the manual page should have: one of
n,l, or1. The Makefile must supply the .. See man1dir.man3dirFrom man3dir.U:
This variable contains the name of the directory in which manual source pages are to be put. It is the responsibility of the Makefile.SH to get the value of this into the proper command. You must be prepared to do the ~name expansion yourself.
man3direxpFrom man3dir.U:
This variable is the same as the man3dir variable, but is filename expanded at configuration time, for convenient use in makefiles.
man3extFrom man3dir.U:
This variable contains the extension that the manual page should have: one of
n,l, or3. The Makefile must supply the .. See man3dir.
M
MccFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the Mcc program. After Configure runs, the value is reset to a plain
Mccand is not useful.mips_typeFrom usrinc.U:
This variable holds the environment type for the mips system. Possible values are "BSD 4.3" and "System V".
mistrustnmFrom Csym.U:
This variable can be used to establish a fallthrough for the cases where nm fails to find a symbol. If usenm is false or usenm is true and mistrustnm is false, this variable has no effect. If usenm is true and mistrustnm is
compile, a test program will be compiled to try to find any symbol that can't be located via nm lookup. If mistrustnm isrun, the test program will be run as well as being compiled.mkdirFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the mkdir program. After Configure runs, the value is reset to a plain
mkdirand is not useful.mmaptypeFrom d_mmap.U:
This symbol contains the type of pointer returned by mmap() (and simultaneously the type of the first argument). It can be
void *orcaddr_t.modetypeFrom modetype.U:
This variable defines modetype to be something like mode_t, int, unsigned short, or whatever type is used to declare file modes for system calls.
moreFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the more program. After Configure runs, the value is reset to a plain
moreand is not useful.multiarchFrom multiarch.U:
This variable conditionally defines the
MULTIARCHsymbol which signifies the presence of multiplatform files. This is normally set by hints files.mvFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
myarchnameFrom archname.U:
This variable holds the architecture name computed by Configure in a previous run. It is not intended to be perused by any user and should never be set in a hint file.
mydomainFrom myhostname.U:
This variable contains the eventual value of the
MYDOMAINsymbol, which is the domain of the host the program is going to run on. The domain must be appended to myhostname to form a complete host name. The dot comes with mydomain, and need not be supplied by the program.myhostnameFrom myhostname.U:
This variable contains the eventual value of the
MYHOSTNAMEsymbol, which is the name of the host the program is going to run on. The domain is not kept with hostname, but must be gotten from mydomain. The dot comes with mydomain, and need not be supplied by the program.myunameFrom Oldconfig.U:
The output of
uname -aif available, otherwise the hostname. On Xenix, pseudo variables assignments in the output are stripped, thank you. The whole thing is then lower-cased.
n
nFrom n.U:
This variable contains the
-nflag if that is what causes the echo command to suppress newline. Otherwise it is null. Correct usage is $echo $n "prompt for a question: $c".need_va_copyFrom need_va_copy.U:
This symbol, if defined, indicates that the system stores the variable argument list datatype, va_list, in a format that cannot be copied by simple assignment, so that some other means must be used when copying is required. As such systems vary in their provision (or non-provision) of copying mechanisms, handy.h defines a platform-
independentmacro, Perl_va_copy(src, dst), to do the job.netdb_hlen_typeFrom netdbtype.U:
This variable holds the type used for the 2nd argument to gethostbyaddr(). Usually, this is int or size_t or unsigned. This is only useful if you have gethostbyaddr(), naturally.
netdb_host_typeFrom netdbtype.U:
This variable holds the type used for the 1st argument to gethostbyaddr(). Usually, this is char * or void *, possibly with or without a const prefix. This is only useful if you have gethostbyaddr(), naturally.
netdb_name_typeFrom netdbtype.U:
This variable holds the type used for the argument to gethostbyname(). Usually, this is char * or const char *. This is only useful if you have gethostbyname(), naturally.
netdb_net_typeFrom netdbtype.U:
This variable holds the type used for the 1st argument to getnetbyaddr(). Usually, this is int or long. This is only useful if you have getnetbyaddr(), naturally.
nmFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the nm program. After Configure runs, the value is reset to a plain
nmand is not useful.nm_optFrom usenm.U:
This variable holds the options that may be necessary for nm.
nm_so_optFrom usenm.U:
This variable holds the options that may be necessary for nm to work on a shared library but that can not be used on an archive library. Currently, this is only used by Linux, where nm --dynamic is *required* to get symbols from an
ELFlibrary which has been stripped, but nm --dynamic is *fatal* on an archive library. Maybe Linux should just always set usenm=false.nonxs_extFrom Extensions.U:
This variable holds a list of all non-xs extensions included in the package. All of them will be built.
nroffFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the nroff program. After Configure runs, the value is reset to a plain
nroffand is not useful.nv_preserves_uv_bitsFrom perlxv.U:
This variable indicates how many of bits type uvtype a variable nvtype can preserve.
nveformatFrom perlxvf.U:
This variable contains the format string used for printing a Perl
NVusing %e-ish floating point format.nvEUformatFrom perlxvf.U:
This variable contains the format string used for printing a Perl
NVusing %E-ish floating point format.nvfformatFrom perlxvf.U:
This variable confains the format string used for printing a Perl
NVusing %f-ish floating point format.nvFUformatFrom perlxvf.U:
This variable confains the format string used for printing a Perl
NVusing %F-ish floating point format.nvgformatFrom perlxvf.U:
This variable contains the format string used for printing a Perl
NVusing %g-ish floating point format.nvGUformatFrom perlxvf.U:
This variable contains the format string used for printing a Perl
NVusing %G-ish floating point format.nvsizeFrom perlxv.U:
This variable is the size of an
NVin bytes.nvtypeFrom perlxv.U:
This variable contains the C type used for Perl's
NV.
o
o_nonblockFrom nblock_io.U:
This variable bears the symbol value to be used during open() or fcntl() to turn on non-blocking I/O for a file descriptor. If you wish to switch between blocking and non-blocking, you may try ioctl(
FIOSNBIO) instead, but that is only supported by some devices.obj_extFrom Unix.U:
This is an old synonym for _o.
old_pthread_create_joinableFrom d_pthrattrj.U:
This variable defines the constant to use for creating joinable (aka undetached) pthreads. Unused if pthread.h defines
PTHREAD_CREATE_JOINABLE. If used, possible values arePTHREAD_CREATE_UNDETACHEDand__UNDETACHED.optimizeFrom ccflags.U:
This variable contains any optimizer/debugger flag that should be used. It is up to the Makefile to use it.
orderlibFrom orderlib.U:
This variable is
trueif the components of libraries must be ordered (with `lorder $* | tsort`) before placing them in an archive. Set tofalseif ranlib or ar can generate random libraries.osnameFrom Oldconfig.U:
This variable contains the operating system name (e.g. sunos, solaris, hpux, etc.). It can be useful later on for setting defaults. Any spaces are replaced with underscores. It is set to a null string if we can't figure it out.
osversFrom Oldconfig.U:
This variable contains the operating system version (e.g. 4.1.3, 5.2, etc.). It is primarily used for helping select an appropriate hints file, but might be useful elsewhere for setting defaults. It is set to '' if we can't figure it out. We try to be flexible about how much of the version number to keep, e.g. if 4.1.1, 4.1.2, and 4.1.3 are essentially the same for this package, hints files might just be os_4.0 or os_4.1, etc., not keeping separate files for each little release.
otherlibdirsFrom otherlibdirs.U:
This variable contains a colon-separated set of paths for the perl binary to search for additional library files or modules. These directories will be tacked to the end of @
INC. Perl will automatically search below each path for version- and architecture-specific directories. See inc_version_list for more details. A value ofmeansnoneand is used to preserve this value for the next run through Configure.
p
packageFrom package.U:
This variable contains the name of the package being constructed. It is primarily intended for the use of later Configure units.
pagerFrom pager.U:
This variable contains the name of the preferred pager on the system. Usual values are (the full pathnames of) more, less, pg, or cat.
passcatFrom nis.U:
This variable contains a command that produces the text of the /etc/passwd file. This is normally "cat /etc/passwd", but can be "ypcat passwd" when
NISis used. On some systems, such as os390, there may be no equivalent command, in which case this variable is unset.patchlevelFrom patchlevel.U:
The patchlevel level of this package. The value of patchlevel comes from the patchlevel.h file. In a version number such as 5.6.1, this is the
6. In patchlevel.h, this is referred to asPERL_VERSION.path_sepFrom Unix.U:
This is an old synonym for p_ in Head.U, the character used to separate elements in the command shell search
PATH.perlFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
perl5From perl5.U:
This variable contains the full path (if any) to a previously installed perl5.005 or later suitable for running the script to determine inc_version_list.
P
PERL_API_REVISIONFrom patchlevel.h:
This number describes the earliest compatible
PERL_REVISIONof Perl (compatibilityhere being defined as sufficient binary/APIcompatibility to runXScode built with the older version). Normally this does not change across maintenance releases. Please read the comment in patchlevel.h.PERL_API_SUBVERSIONFrom patchlevel.h:
This number describes the earliest compatible
PERL_SUBVERSIONof Perl (compatibilityhere being defined as sufficient binary/APIcompatibility to runXScode built with the older version). Normally this does not change across maintenance releases. Please read the comment in patchlevel.h.PERL_API_VERSIONFrom patchlevel.h:
This number describes the earliest compatible
PERL_VERSIONof Perl (compatibilityhere being defined as sufficient binary/APIcompatibility to runXScode built with the older version). Normally this does not change across maintenance releases. Please read the comment in patchlevel.h.PERL_CONFIG_SHFrom Oldsyms.U:
This is set to
truein config.sh so that a shell script sourcing config.sh can tell if it has been sourced already.PERL_PATCHLEVELFrom Oldsyms.U:
This symbol reflects the patchlevel, if available. Will usually come from the .patch file, which is available when the perl source tree was fetched with rsync.
perl_patchlevelFrom patchlevel.U:
This is the Perl patch level, a numeric change identifier, as defined by whichever source code maintenance system is used to maintain the patches; currently Perforce. It does not correlate with the Perl version numbers or the maintenance versus development dichotomy except by also being increasing.
PERL_REVISIONFrom Oldsyms.U:
In a Perl version number such as 5.6.2, this is the 5. This value is manually set in patchlevel.h
PERL_SUBVERSIONFrom Oldsyms.U:
In a Perl version number such as 5.6.2, this is the 2. Values greater than 50 represent potentially unstable development subversions. This value is manually set in patchlevel.h
PERL_VERSIONFrom Oldsyms.U:
In a Perl version number such as 5.6.2, this is the 6. This value is manually set in patchlevel.h
perladminFrom perladmin.U:
Electronic mail address of the perl5 administrator.
perllibsFrom End.U:
The list of libraries needed by Perl only (any libraries needed by extensions only will by dropped, if using dynamic loading).
perlpathFrom perlpath.U:
This variable contains the eventual value of the
PERLPATHsymbol, which contains the name of the perl interpreter to be used in shell scripts and in the "evalexec" idiom. This variable is not necessarily the pathname of the file containing the perl interpreter; you must append the executable extension (_exe) if it is not already present. Note that Perl code that runs during the Perl build process cannot reference this variable, as Perl may not have been installed, or even if installed, may be a different version of Perl.pgFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the pg program. After Configure runs, the value is reset to a plain
pgand is not useful.phostnameFrom myhostname.U:
This variable contains the eventual value of the
PHOSTNAMEsymbol, which is a command that can be fed to popen() to get the host name. The program should probably not presume that the domain is or isn't there already.pidtypeFrom pidtype.U:
This variable defines
PIDTYPEto be something like pid_t, int, ushort, or whatever type is used to declare process ids in the kernel.plibpthFrom libpth.U:
Holds the private path used by Configure to find out the libraries. Its value is prepend to libpth. This variable takes care of special machines, like the mips. Usually, it should be empty.
pmakeFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
prFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
prefixFrom prefix.U:
This variable holds the name of the directory below which the user will install the package. Usually, this is /usr/local, and executables go in /usr/local/bin, library stuff in /usr/local/lib, man pages in /usr/local/man, etc. It is only used to set defaults for things in bin.U, mansrc.U, privlib.U, or scriptdir.U.
prefixexpFrom prefix.U:
This variable holds the full absolute path of the directory below which the user will install the package. Derived from prefix.
privlibFrom privlib.U:
This variable contains the eventual value of the
PRIVLIBsymbol, which is the name of the private library for this package. It may have a ~ on the front. It is up to the makefile to eventually create this directory while performing installation (with ~ substitution).privlibexpFrom privlib.U:
This variable is the ~name expanded version of privlib, so that you may use it directly in Makefiles or shell scripts.
procselfexeFrom d_procselfexe.U:
If d_procselfexe is defined, $procselfexe is the filename of the symbolic link pointing to the absolute pathname of the executing program.
prototypeFrom prototype.U:
This variable holds the eventual value of
CAN_PROTOTYPE, which indicates the C compiler can handle funciton prototypes.ptrsizeFrom ptrsize.U:
This variable contains the value of the
PTRSIZEsymbol, which indicates to the C program how many bytes there are in a pointer.
q
quadkindFrom quadtype.U:
This variable, if defined, encodes the type of a quad: 1 = int, 2 = long, 3 = long long, 4 = int64_t.
quadtypeFrom quadtype.U:
This variable defines Quad_t to be something like long, int, long long, int64_t, or whatever type is used for 64-bit integers.
r
randbitsFrom randfunc.U:
Indicates how many bits are produced by the function used to generate normalized random numbers.
randfuncFrom randfunc.U:
Indicates the name of the random number function to use. Values include drand48, random, and rand. In C programs, the
Drand01macro is defined to generate uniformly distributed random numbers over the range [0., 1.[ (see drand01 and nrand).random_r_protoFrom d_random_r.U:
This variable encodes the prototype of random_r. It is zero if d_random_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_random_r is defined.randseedtypeFrom randfunc.U:
Indicates the type of the argument of the seedfunc.
ranlibFrom orderlib.U:
This variable is set to the pathname of the ranlib program, if it is needed to generate random libraries. Set to
:if ar can generate random libraries or if random libraries are not supportedrd_nodataFrom nblock_io.U:
This variable holds the return code from read() when no data is present. It should be -1, but some systems return 0 when
O_NDELAYis used, which is a shame because you cannot make the difference between no data and an EOF.. Sigh!readdir64_r_protoFrom d_readdir64_r.U:
This variable encodes the prototype of readdir64_r. It is zero if d_readdir64_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_readdir64_r is defined.readdir_r_protoFrom d_readdir_r.U:
This variable encodes the prototype of readdir_r. It is zero if d_readdir_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_readdir_r is defined.revisionFrom patchlevel.U:
The value of revision comes from the patchlevel.h file. In a version number such as 5.6.1, this is the
5. In patchlevel.h, this is referred to asPERL_REVISION.rmFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the rm program. After Configure runs, the value is reset to a plain
rmand is not useful.rm_tryFrom Unix.U:
This is a cleanup variable for try test programs. Internal Configure use only.
rmailFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
runFrom Cross.U:
This variable contains the command used by Configure to copy and execute a cross-compiled executable in the target host. Useful and available only during Perl build. Empty string '' if not cross-compiling.
runnmFrom usenm.U:
This variable contains
trueorfalsedepending whether the nm extraction should be performed or not, according to the value of usenm and the flags on the Configure command line.
s
sched_yieldFrom d_pthread_y.U:
This variable defines the way to yield the execution of the current thread.
scriptdirFrom scriptdir.U:
This variable holds the name of the directory in which the user wants to put publicly scripts for the package in question. It is either the same directory as for binaries, or a special one that can be mounted across different architectures, like /usr/share. Programs must be prepared to deal with ~name expansion.
scriptdirexpFrom scriptdir.U:
This variable is the same as scriptdir, but is filename expanded at configuration time, for programs not wanting to bother with it.
sedFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the sed program. After Configure runs, the value is reset to a plain
sedand is not useful.seedfuncFrom randfunc.U:
Indicates the random number generating seed function. Values include srand48, srandom, and srand.
selectminbitsFrom selectminbits.U:
This variable holds the minimum number of bits operated by select. That is, if you do select(n, ...), how many bits at least will be cleared in the masks if some activity is detected. Usually this is either n or 32*ceil(n/32), especially many little-endians do the latter. This is only useful if you have select(), naturally.
selecttypeFrom selecttype.U:
This variable holds the type used for the 2nd, 3rd, and 4th arguments to select. Usually, this is
fd_set *, ifHAS_FD_SETis defined, andint *otherwise. This is only useful if you have select(), naturally.sendmailFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
setgrent_r_protoFrom d_setgrent_r.U:
This variable encodes the prototype of setgrent_r. It is zero if d_setgrent_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_setgrent_r is defined.sethostent_r_protoFrom d_sethostent_r.U:
This variable encodes the prototype of sethostent_r. It is zero if d_sethostent_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_sethostent_r is defined.setlocale_r_protoFrom d_setlocale_r.U:
This variable encodes the prototype of setlocale_r. It is zero if d_setlocale_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_setlocale_r is defined.setnetent_r_protoFrom d_setnetent_r.U:
This variable encodes the prototype of setnetent_r. It is zero if d_setnetent_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_setnetent_r is defined.setprotoent_r_protoFrom d_setprotoent_r.U:
This variable encodes the prototype of setprotoent_r. It is zero if d_setprotoent_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_setprotoent_r is defined.setpwent_r_protoFrom d_setpwent_r.U:
This variable encodes the prototype of setpwent_r. It is zero if d_setpwent_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_setpwent_r is defined.setservent_r_protoFrom d_setservent_r.U:
This variable encodes the prototype of setservent_r. It is zero if d_setservent_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_setservent_r is defined.shFrom sh.U:
This variable contains the full pathname of the shell used on this system to execute Bourne shell scripts. Usually, this will be /bin/sh, though it's possible that some systems will have /bin/ksh, /bin/pdksh, /bin/ash, /bin/bash, or even something such as D:/bin/sh.exe. This unit comes before Options.U, so you can't set sh with a
-Doption, though you can override this (and startsh) with-O -Dsh=<i>/bin/whatever</i> -Dstartsh=whateversharFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
sharpbangFrom spitshell.U:
This variable contains the string #! if this system supports that construct.
shmattypeFrom d_shmat.U:
This symbol contains the type of pointer returned by shmat(). It can be
void *orchar *.shortsizeFrom intsize.U:
This variable contains the value of the
SHORTSIZEsymbol which indicates to the C program how many bytes there are in a short.shrpenvFrom libperl.U:
If the user builds a shared libperl.so, then we need to tell the
perlexecutable where it will be able to find the installed libperl.so. One way to do this on some systems is to set the environment variableLD_RUN_PATHto the directory that will be the final location of the shared libperl.so. The makefile can use this with something like $shrpenv $(CC) -o perl perlmain.o $libperl $libs Typical values are shrpenv="envLD_RUN_PATH=$archlibexp/CORE" or shrpenv='' See the main perl Makefile.SH for actual working usage. Alternatively, we might be able to use a command line option such as -R $archlibexp/CORE(Solaris) or -Wl,-rpath $archlibexp/CORE(Linux).shsharpFrom spitshell.U:
This variable tells further Configure units whether your sh can handle # comments.
sig_countFrom sig_name.U:
This variable holds a number larger than the largest valid signal number. This is usually the same as the
NSIGmacro.sig_nameFrom sig_name.U:
This variable holds the signal names, space separated. The leading
SIGin signal name is removed. AZEROis prepended to the list. This is currently not used, sig_name_init is used instead.sig_name_initFrom sig_name.U:
This variable holds the signal names, enclosed in double quotes and separated by commas, suitable for use in the
SIG_NAMEdefinition below. AZEROis prepended to the list, and the list is terminated with a plain 0. The leadingSIGin signal names is removed. See sig_num.sig_numFrom sig_name.U:
This variable holds the signal numbers, space separated. A
ZEROis prepended to the list (corresponding to the fakeSIGZERO). Those numbers correspond to the value of the signal listed in the same place within the sig_name list. This is currently not used, sig_num_init is used instead.sig_num_initFrom sig_name.U:
This variable holds the signal numbers, enclosed in double quotes and separated by commas, suitable for use in the
SIG_NUMdefinition below. AZEROis prepended to the list, and the list is terminated with a plain 0.sig_sizeFrom sig_name.U:
This variable contains the number of elements of the sig_name and sig_num arrays.
signal_tFrom d_voidsig.U:
This variable holds the type of the signal handler (void or int).
sitearchFrom sitearch.U:
This variable contains the eventual value of the
SITEARCHsymbol, which is the name of the private library for this package. It may have a ~ on the front. It is up to the makefile to eventually create this directory while performing installation (with ~ substitution). The standard distribution will put nothing in this directory. After perl has been installed, users may install their own local architecture-dependent modules in this directory with MakeMaker Makefile.PL or equivalent. SeeINSTALLfor details.sitearchexpFrom sitearch.U:
This variable is the ~name expanded version of sitearch, so that you may use it directly in Makefiles or shell scripts.
sitebinFrom sitebin.U:
This variable holds the name of the directory in which the user wants to put add-on publicly executable files for the package in question. It is most often a local directory such as /usr/local/bin. Programs using this variable must be prepared to deal with ~name substitution. The standard distribution will put nothing in this directory. After perl has been installed, users may install their own local executables in this directory with MakeMaker Makefile.PL or equivalent. See
INSTALLfor details.sitebinexpFrom sitebin.U:
This is the same as the sitebin variable, but is filename expanded at configuration time, for use in your makefiles.
sitehtml1dirFrom sitehtml1dir.U:
This variable contains the name of the directory in which site-specific html source pages are to be put. It is the responsibility of the Makefile.SH to get the value of this into the proper command. You must be prepared to do the ~name expansion yourself. The standard distribution will put nothing in this directory. After perl has been installed, users may install their own local html pages in this directory with MakeMaker Makefile.PL or equivalent. See
INSTALLfor details.sitehtml1direxpFrom sitehtml1dir.U:
This variable is the same as the sitehtml1dir variable, but is filename expanded at configuration time, for convenient use in makefiles.
sitehtml3dirFrom sitehtml3dir.U:
This variable contains the name of the directory in which site-specific library html source pages are to be put. It is the responsibility of the Makefile.SH to get the value of this into the proper command. You must be prepared to do the ~name expansion yourself. The standard distribution will put nothing in this directory. After perl has been installed, users may install their own local library html pages in this directory with MakeMaker Makefile.PL or equivalent. See
INSTALLfor details.sitehtml3direxpFrom sitehtml3dir.U:
This variable is the same as the sitehtml3dir variable, but is filename expanded at configuration time, for convenient use in makefiles.
sitelibFrom sitelib.U:
This variable contains the eventual value of the
SITELIBsymbol, which is the name of the private library for this package. It may have a ~ on the front. It is up to the makefile to eventually create this directory while performing installation (with ~ substitution). The standard distribution will put nothing in this directory. After perl has been installed, users may install their own local architecture-independent modules in this directory with MakeMaker Makefile.PL or equivalent. SeeINSTALLfor details.sitelib_stemFrom sitelib.U:
This variable is $sitelibexp with any trailing version-specific component removed. The elements in inc_version_list (inc_version_list.U) can be tacked onto this variable to generate a list of directories to search.
sitelibexpFrom sitelib.U:
This variable is the ~name expanded version of sitelib, so that you may use it directly in Makefiles or shell scripts.
siteman1dirFrom siteman1dir.U:
This variable contains the name of the directory in which site-specific manual source pages are to be put. It is the responsibility of the Makefile.SH to get the value of this into the proper command. You must be prepared to do the ~name expansion yourself. The standard distribution will put nothing in this directory. After perl has been installed, users may install their own local man1 pages in this directory with MakeMaker Makefile.PL or equivalent. See
INSTALLfor details.siteman1direxpFrom siteman1dir.U:
This variable is the same as the siteman1dir variable, but is filename expanded at configuration time, for convenient use in makefiles.
siteman3dirFrom siteman3dir.U:
This variable contains the name of the directory in which site-specific library man source pages are to be put. It is the responsibility of the Makefile.SH to get the value of this into the proper command. You must be prepared to do the ~name expansion yourself. The standard distribution will put nothing in this directory. After perl has been installed, users may install their own local man3 pages in this directory with MakeMaker Makefile.PL or equivalent. See
INSTALLfor details.siteman3direxpFrom siteman3dir.U:
This variable is the same as the siteman3dir variable, but is filename expanded at configuration time, for convenient use in makefiles.
siteprefixFrom siteprefix.U:
This variable holds the full absolute path of the directory below which the user will install add-on packages. See
INSTALLfor usage and examples.siteprefixexpFrom siteprefix.U:
This variable holds the full absolute path of the directory below which the user will install add-on packages. Derived from siteprefix.
sitescriptFrom sitescript.U:
This variable holds the name of the directory in which the user wants to put add-on publicly executable files for the package in question. It is most often a local directory such as /usr/local/bin. Programs using this variable must be prepared to deal with ~name substitution. The standard distribution will put nothing in this directory. After perl has been installed, users may install their own local scripts in this directory with MakeMaker Makefile.PL or equivalent. See
INSTALLfor details.sitescriptexpFrom sitescript.U:
This is the same as the sitescript variable, but is filename expanded at configuration time, for use in your makefiles.
sizesizeFrom sizesize.U:
This variable contains the size of a sizetype in bytes.
sizetypeFrom sizetype.U:
This variable defines sizetype to be something like size_t, unsigned long, or whatever type is used to declare length parameters for string functions.
sleepFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
smailFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
soFrom so.U:
This variable holds the extension used to identify shared libraries (also known as shared objects) on the system. Usually set to
so.sockethdrFrom d_socket.U:
This variable has any cpp
-Iflags needed for socket support.socketlibFrom d_socket.U:
This variable has the names of any libraries needed for socket support.
socksizetypeFrom socksizetype.U:
This variable holds the type used for the size argument for various socket calls like accept. Usual values include socklen_t, size_t, and int.
sortFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the sort program. After Configure runs, the value is reset to a plain
sortand is not useful.spackageFrom package.U:
This variable contains the name of the package being constructed, with the first letter uppercased, i.e. suitable for starting sentences.
spitshellFrom spitshell.U:
This variable contains the command necessary to spit out a runnable shell on this system. It is either cat or a grep
-vfor # comments.sPRId64From quadfio.U:
This variable, if defined, contains the string used by stdio to format 64-bit decimal numbers (format
d) for output.sPRIeldblFrom longdblfio.U:
This variable, if defined, contains the string used by stdio to format long doubles (format
e) for output.sPRIEUldblFrom longdblfio.U:
This variable, if defined, contains the string used by stdio to format long doubles (format
E) for output. TheUin the name is to separate this from sPRIeldbl so that even case-blind systems can see the difference.sPRIfldblFrom longdblfio.U:
This variable, if defined, contains the string used by stdio to format long doubles (format
f) for output.sPRIFUldblFrom longdblfio.U:
This variable, if defined, contains the string used by stdio to format long doubles (format
F) for output. TheUin the name is to separate this from sPRIfldbl so that even case-blind systems can see the difference.sPRIgldblFrom longdblfio.U:
This variable, if defined, contains the string used by stdio to format long doubles (format
g) for output.sPRIGUldblFrom longdblfio.U:
This variable, if defined, contains the string used by stdio to format long doubles (format
G) for output. TheUin the name is to separate this from sPRIgldbl so that even case-blind systems can see the difference.sPRIi64From quadfio.U:
This variable, if defined, contains the string used by stdio to format 64-bit decimal numbers (format
i) for output.sPRIo64From quadfio.U:
This variable, if defined, contains the string used by stdio to format 64-bit octal numbers (format
o) for output.sPRIu64From quadfio.U:
This variable, if defined, contains the string used by stdio to format 64-bit unsigned decimal numbers (format
u) for output.sPRIx64From quadfio.U:
This variable, if defined, contains the string used by stdio to format 64-bit hexadecimal numbers (format
x) for output.sPRIXU64From quadfio.U:
This variable, if defined, contains the string used by stdio to format 64-bit hExADECimAl numbers (format
X) for output. TheUin the name is to separate this from sPRIx64 so that even case-blind systems can see the difference.srand48_r_protoFrom d_srand48_r.U:
This variable encodes the prototype of srand48_r. It is zero if d_srand48_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_srand48_r is defined.srandom_r_protoFrom d_srandom_r.U:
This variable encodes the prototype of srandom_r. It is zero if d_srandom_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_srandom_r is defined.srcFrom src.U:
This variable holds the path to the package source. It is up to the Makefile to use this variable and set
VPATHaccordingly to find the sources remotely.sSCNfldblFrom longdblfio.U:
This variable, if defined, contains the string used by stdio to format long doubles (format
f) for input.ssizetypeFrom ssizetype.U:
This variable defines ssizetype to be something like ssize_t, long or int. It is used by functions that return a count of bytes or an error condition. It must be a signed type. We will pick a type such that sizeof(SSize_t) == sizeof(Size_t).
startperlFrom startperl.U:
This variable contains the string to put on the front of a perl script to make sure (hopefully) that it runs with perl and not some shell. Of course, that leading line must be followed by the classical perl idiom: eval 'exec perl -S $0 ${1+
$@}' if $running_under_some_shell; to guarantee perl startup should the shell execute the script. Note that this magic incatation is not understood by csh.startshFrom startsh.U:
This variable contains the string to put on the front of a shell script to make sure (hopefully) that it runs with sh and not some other shell.
static_extFrom Extensions.U:
This variable holds a list of
XSextension files we want to link statically into the package. It is used by Makefile.stdcharFrom stdchar.U:
This variable conditionally defines
STDCHARto be the type of char used in stdio.h. It has the values "unsigned char" orchar.stdio_baseFrom d_stdstdio.U:
This variable defines how, given a
FILEpointer, fp, to access the _base field (or equivalent) of stdio.h'sFILEstructure. This will be used to define the macro FILE_base(fp).stdio_bufsizFrom d_stdstdio.U:
This variable defines how, given a
FILEpointer, fp, to determine the number of bytes store in the I/O buffer pointer to by the _base field (or equivalent) of stdio.h'sFILEstructure. This will be used to define the macro FILE_bufsiz(fp).stdio_cntFrom d_stdstdio.U:
This variable defines how, given a
FILEpointer, fp, to access the _cnt field (or equivalent) of stdio.h'sFILEstructure. This will be used to define the macro FILE_cnt(fp).stdio_filbufFrom d_stdstdio.U:
This variable defines how, given a
FILEpointer, fp, to tell stdio to refill its internal buffers (?). This will be used to define the macro FILE_filbuf(fp).stdio_ptrFrom d_stdstdio.U:
This variable defines how, given a
FILEpointer, fp, to access the _ptr field (or equivalent) of stdio.h'sFILEstructure. This will be used to define the macro FILE_ptr(fp).stdio_stream_arrayFrom stdio_streams.U:
This variable tells the name of the array holding the stdio streams. Usual values include _iob, __iob, and __sF.
strerror_r_protoFrom d_strerror_r.U:
This variable encodes the prototype of strerror_r. It is zero if d_strerror_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_strerror_r is defined.stringsFrom i_string.U:
This variable holds the full path of the string header that will be used. Typically /usr/include/string.h or /usr/include/strings.h.
submitFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
subversionFrom patchlevel.U:
The subversion level of this package. The value of subversion comes from the patchlevel.h file. In a version number such as 5.6.1, this is the
1. In patchlevel.h, this is referred to asPERL_SUBVERSION. This is unique to perl.sysmanFrom sysman.U:
This variable holds the place where the manual is located on this system. It is not the place where the user wants to put his manual pages. Rather it is the place where Configure may look to find manual for unix commands (section 1 of the manual usually). See mansrc.
t
tailFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
tarFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
targetarchFrom Cross.U:
If cross-compiling, this variable contains the target architecture. If not, this will be empty.
tblFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
teeFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
testFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the test program. After Configure runs, the value is reset to a plain
testand is not useful.timeinclFrom i_time.U:
This variable holds the full path of the included time header(s).
timetypeFrom d_time.U:
This variable holds the type returned by time(). It can be long, or time_t on
BSDsites (in which case <sys/types.h> should be included). Anyway, the type Time_t should be used.tmpnam_r_protoFrom d_tmpnam_r.U:
This variable encodes the prototype of tmpnam_r. It is zero if d_tmpnam_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_tmpnam_r is defined.toFrom Cross.U:
This variable contains the command used by Configure to copy to from the target host. Useful and available only during Perl build. The string
:if not cross-compiling.touchFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the touch program. After Configure runs, the value is reset to a plain
touchand is not useful.trFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the tr program. After Configure runs, the value is reset to a plain
trand is not useful.trnlFrom trnl.U:
This variable contains the value to be passed to the tr(1) command to transliterate a newline. Typical values are
\012and\n. This is needed forEBCDICsystems where newline is not necessarily\012.troffFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
ttyname_r_protoFrom d_ttyname_r.U:
This variable encodes the prototype of ttyname_r. It is zero if d_ttyname_r is undef, and one of the
REENTRANT_PROTO_T_ABCmacros of reentr.h if d_ttyname_r is defined.
u
u16sizeFrom perlxv.U:
This variable is the size of an U16 in bytes.
u16typeFrom perlxv.U:
This variable contains the C type used for Perl's U16.
u32sizeFrom perlxv.U:
This variable is the size of an U32 in bytes.
u32typeFrom perlxv.U:
This variable contains the C type used for Perl's U32.
u64sizeFrom perlxv.U:
This variable is the size of an U64 in bytes.
u64typeFrom perlxv.U:
This variable contains the C type used for Perl's U64.
u8sizeFrom perlxv.U:
This variable is the size of an U8 in bytes.
u8typeFrom perlxv.U:
This variable contains the C type used for Perl's U8.
uidformatFrom uidf.U:
This variable contains the format string used for printing a Uid_t.
uidsignFrom uidsign.U:
This variable contains the signedness of a uidtype. 1 for unsigned, -1 for signed.
uidsizeFrom uidsize.U:
This variable contains the size of a uidtype in bytes.
uidtypeFrom uidtype.U:
This variable defines Uid_t to be something like uid_t, int, ushort, or whatever type is used to declare user ids in the kernel.
unameFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the uname program. After Configure runs, the value is reset to a plain
unameand is not useful.uniqFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the uniq program. After Configure runs, the value is reset to a plain
uniqand is not useful.uquadtypeFrom quadtype.U:
This variable defines Uquad_t to be something like unsigned long, unsigned int, unsigned long long, uint64_t, or whatever type is used for 64-bit integers.
use5005threadsFrom usethreads.U:
This variable conditionally defines the USE_5005THREADS symbol, and indicates that Perl should be built to use the 5.005-based threading implementation. Only valid up to 5.8.x.
use64bitallFrom use64bits.U:
This variable conditionally defines the USE_64_BIT_ALL symbol, and indicates that 64-bit integer types should be used when available. The maximal possible 64-bitness is employed: LP64 or ILP64, meaning that you will be able to use more than 2 gigabytes of memory. This mode is even more binary incompatible than USE_64_BIT_INT. You may not be able to run the resulting executable in a 32-bit
CPUat all or you may need at least to reboot yourOSto 64-bit mode.use64bitintFrom use64bits.U:
This variable conditionally defines the USE_64_BIT_INT symbol, and indicates that 64-bit integer types should be used when available. The minimal possible 64-bitness is employed, just enough to get 64-bit integers into Perl. This may mean using for example "long longs", while your memory may still be limited to 2 gigabytes.
usecrosscompileFrom Cross.U:
This variable conditionally defines the
USE_CROSS_COMPILEsymbol, and indicates that Perl has been cross-compiled.usedlFrom dlsrc.U:
This variable indicates if the system supports dynamic loading of some sort. See also dlsrc and dlobj.
usefaststdioFrom usefaststdio.U:
This variable conditionally defines the
USE_FAST_STDIOsymbol, and indicates that Perl should be built to usefast stdio. Defaults to define in Perls 5.8 and earlier, to undef later.useithreadsFrom usethreads.U:
This variable conditionally defines the
USE_ITHREADSsymbol, and indicates that Perl should be built to use the interpreter-based threading implementation.uselargefilesFrom uselfs.U:
This variable conditionally defines the
USE_LARGE_FILESsymbol, and indicates that large file interfaces should be used when available.uselongdoubleFrom uselongdbl.U:
This variable conditionally defines the
USE_LONG_DOUBLEsymbol, and indicates that long doubles should be used when available.usemallocwrapFrom mallocsrc.U:
This variable contains y if we are wrapping malloc to prevent integer overflow during size calculations.
usemorebitsFrom usemorebits.U:
This variable conditionally defines the
USE_MORE_BITSsymbol, and indicates that explicit 64-bit interfaces and long doubles should be used when available.usemultiplicityFrom usemultiplicity.U:
This variable conditionally defines the
MULTIPLICITYsymbol, and indicates that Perl should be built to use multiplicity.usemymallocFrom mallocsrc.U:
This variable contains y if the malloc that comes with this package is desired over the system's version of malloc. People often include special versions of malloc for effiency, but such versions are often less portable. See also mallocsrc and mallocobj. If this is
y, then -lmalloc is removed from $libs.usenmFrom usenm.U:
This variable contains
trueorfalsedepending whether the nm extraction is wanted or not.useopcodeFrom Extensions.U:
This variable holds either
trueorfalseto indicate whether the Opcode extension should be used. The sole use for this currently is to allow an easy mechanism for users to skip the Opcode extension from the Configure command line.useperlioFrom useperlio.U:
This variable conditionally defines the
USE_PERLIOsymbol, and indicates that the PerlIO abstraction should be used throughout.useposixFrom Extensions.U:
This variable holds either
trueorfalseto indicate whether thePOSIXextension should be used. The sole use for this currently is to allow an easy mechanism for hints files to indicate thatPOSIXwill not compile on a particular system.usereentrantFrom usethreads.U:
This variable conditionally defines the
USE_REENTRANT_APIsymbol, which indicates that the thread code may try to use the various _r versions of library functions. This is only potentially meaningful if usethreads is set and is very experimental, it is not even prompted for.userelocatableincFrom bin.U:
This variable is set to true to indicate that perl should relocate @
INCentries at runtime based on the path to the perl binary. Any @INCpaths starting .../ are relocated relative to the directory containing the perl binary, and a logical cleanup of the path is then made around the join point (removing dir/../ pairs)usesfioFrom d_sfio.U:
This variable is set to true when the user agrees to use sfio. It is set to false when sfio is not available or when the user explicitely requests not to use sfio. It is here primarily so that command-line settings can override the auto-detection of d_sfio without running into a "WHOA THERE".
useshrplibFrom libperl.U:
This variable is set to
trueif the user wishes to build a shared libperl, andfalseotherwise.usesitecustomizeFrom d_sitecustomize.U:
This variable is set to true when the user requires a mechanism that allows the sysadmin to add entries to @
INCat runtime. This variable being set, makes perl run $sitelib/sitecustomize.pl at startup.usesocksFrom usesocks.U:
This variable conditionally defines the
USE_SOCKSsymbol, and indicates that Perl should be built to useSOCKS.usethreadsFrom usethreads.U:
This variable conditionally defines the
USE_THREADSsymbol, and indicates that Perl should be built to use threads.usevendorprefixFrom vendorprefix.U:
This variable tells whether the vendorprefix and consequently other vendor* paths are in use.
usevforkFrom d_vfork.U:
This variable is set to true when the user accepts to use vfork. It is set to false when no vfork is available or when the user explicitely requests not to use vfork.
usrincFrom usrinc.U:
This variable holds the path of the include files, which is usually /usr/include. It is mainly used by other Configure units.
uunameFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
uvoformatFrom perlxvf.U:
This variable contains the format string used for printing a Perl
UVas an unsigned octal integer.uvsizeFrom perlxv.U:
This variable is the size of a
UVin bytes.uvtypeFrom perlxv.U:
This variable contains the C type used for Perl's
UV.uvuformatFrom perlxvf.U:
This variable contains the format string used for printing a Perl
UVas an unsigned decimal integer.uvxformatFrom perlxvf.U:
This variable contains the format string used for printing a Perl
UVas an unsigned hexadecimal integer in lowercase abcdef.uvXUformatFrom perlxvf.U:
This variable contains the format string used for printing a Perl
UVas an unsigned hexadecimal integer in uppercaseABCDEF.
v
vendorarchFrom vendorarch.U:
This variable contains the value of the
PERL_VENDORARCHsymbol. It may have a ~ on the front. The standard distribution will put nothing in this directory. Vendors who distribute perl may wish to place their own architecture-dependent modules and extensions in this directory with MakeMaker Makefile.PLINSTALLDIRS=vendor or equivalent. SeeINSTALLfor details.vendorarchexpFrom vendorarch.U:
This variable is the ~name expanded version of vendorarch, so that you may use it directly in Makefiles or shell scripts.
vendorbinFrom vendorbin.U:
This variable contains the eventual value of the
VENDORBINsymbol. It may have a ~ on the front. The standard distribution will put nothing in this directory. Vendors who distribute perl may wish to place additional binaries in this directory with MakeMaker Makefile.PLINSTALLDIRS=vendor or equivalent. SeeINSTALLfor details.vendorbinexpFrom vendorbin.U:
This variable is the ~name expanded version of vendorbin, so that you may use it directly in Makefiles or shell scripts.
vendorhtml1dirFrom vendorhtml1dir.U:
This variable contains the name of the directory for html pages. It may have a ~ on the front. The standard distribution will put nothing in this directory. Vendors who distribute perl may wish to place their own html pages in this directory with MakeMaker Makefile.PL
INSTALLDIRS=vendor or equivalent. SeeINSTALLfor details.vendorhtml1direxpFrom vendorhtml1dir.U:
This variable is the ~name expanded version of vendorhtml1dir, so that you may use it directly in Makefiles or shell scripts.
vendorhtml3dirFrom vendorhtml3dir.U:
This variable contains the name of the directory for html library pages. It may have a ~ on the front. The standard distribution will put nothing in this directory. Vendors who distribute perl may wish to place their own html pages for modules and extensions in this directory with MakeMaker Makefile.PL
INSTALLDIRS=vendor or equivalent. SeeINSTALLfor details.vendorhtml3direxpFrom vendorhtml3dir.U:
This variable is the ~name expanded version of vendorhtml3dir, so that you may use it directly in Makefiles or shell scripts.
vendorlibFrom vendorlib.U:
This variable contains the eventual value of the
VENDORLIBsymbol, which is the name of the private library for this package. The standard distribution will put nothing in this directory. Vendors who distribute perl may wish to place their own modules in this directory with MakeMaker Makefile.PLINSTALLDIRS=vendor or equivalent. SeeINSTALLfor details.vendorlib_stemFrom vendorlib.U:
This variable is $vendorlibexp with any trailing version-specific component removed. The elements in inc_version_list (inc_version_list.U) can be tacked onto this variable to generate a list of directories to search.
vendorlibexpFrom vendorlib.U:
This variable is the ~name expanded version of vendorlib, so that you may use it directly in Makefiles or shell scripts.
vendorman1dirFrom vendorman1dir.U:
This variable contains the name of the directory for man1 pages. It may have a ~ on the front. The standard distribution will put nothing in this directory. Vendors who distribute perl may wish to place their own man1 pages in this directory with MakeMaker Makefile.PL
INSTALLDIRS=vendor or equivalent. SeeINSTALLfor details.vendorman1direxpFrom vendorman1dir.U:
This variable is the ~name expanded version of vendorman1dir, so that you may use it directly in Makefiles or shell scripts.
vendorman3dirFrom vendorman3dir.U:
This variable contains the name of the directory for man3 pages. It may have a ~ on the front. The standard distribution will put nothing in this directory. Vendors who distribute perl may wish to place their own man3 pages in this directory with MakeMaker Makefile.PL
INSTALLDIRS=vendor or equivalent. SeeINSTALLfor details.vendorman3direxpFrom vendorman3dir.U:
This variable is the ~name expanded version of vendorman3dir, so that you may use it directly in Makefiles or shell scripts.
vendorprefixFrom vendorprefix.U:
This variable holds the full absolute path of the directory below which the vendor will install add-on packages. See
INSTALLfor usage and examples.vendorprefixexpFrom vendorprefix.U:
This variable holds the full absolute path of the directory below which the vendor will install add-on packages. Derived from vendorprefix.
vendorscriptFrom vendorscript.U:
This variable contains the eventual value of the
VENDORSCRIPTsymbol. It may have a ~ on the front. The standard distribution will put nothing in this directory. Vendors who distribute perl may wish to place additional executable scripts in this directory with MakeMaker Makefile.PLINSTALLDIRS=vendor or equivalent. SeeINSTALLfor details.vendorscriptexpFrom vendorscript.U:
This variable is the ~name expanded version of vendorscript, so that you may use it directly in Makefiles or shell scripts.
versionFrom patchlevel.U:
The full version number of this package, such as 5.6.1 (or 5_6_1). This combines revision, patchlevel, and subversion to get the full version number, including any possible subversions. This is suitable for use as a directory name, and hence is filesystem dependent.
version_patchlevel_stringFrom patchlevel.U:
This is a string combining version, subversion and perl_patchlevel (if perl_patchlevel is non-zero). It is typically something like 'version 7 subversion 1' or 'version 7 subversion 1 patchlevel 11224' It is computed here to avoid duplication of code in myconfig.SH and lib/Config.pm.
versiononlyFrom versiononly.U:
If set, this symbol indicates that only the version-specific components of a perl installation should be installed. This may be useful for making a test installation of a new version without disturbing the existing installation. Setting versiononly is equivalent to setting installperl's -v option. In particular, the non-versioned scripts and programs such as a2p, c2ph, h2xs, pod2*, and perldoc are not installed (see
INSTALLfor a more complete list). Nor are the man pages installed. Usually, this is undef.viFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
voidflagsFrom voidflags.U:
This variable contains the eventual value of the
VOIDFLAGSsymbol, which indicates how much support of the void type is given by this compiler. SeeVOIDFLAGSfor more info.
x
xlibpthFrom libpth.U:
This variable holds extra path (space-separated) used to find libraries on this platform, for example
CPU-specific libraries (on multi-CPUplatforms) may be listed here.
y
yaccFrom yacc.U:
This variable holds the name of the compiler compiler we want to use in the Makefile. It can be yacc, byacc, or bison -y.
yaccflagsFrom yacc.U:
This variable contains any additional yacc flags desired by the user. It is up to the Makefile to use this.
z
zcatFrom Loc.U:
This variable is defined but not used by Configure. The value is a plain '' and is not useful.
zipFrom Loc.U:
This variable is used internally by Configure to determine the full pathname (if any) of the zip program. After Configure runs, the value is reset to a plain
zipand is not useful.
NOTE
This module contains a good example of how to use tie to implement a cache and an example of how to make a tied variable readonly to those outside of it.

