|
Config - access Perl configuration information |
Config - access Perl configuration information
use Config;
if ($Config{'cc'} =~ /gcc/) {
print "built by gcc\n";
}
use Config qw(myconfig config_sh config_vars);
print myconfig();
print config_sh();
config_vars(qw(osname archname));
The Config module contains all the information that was available to
the Configure program at Perl build time (over 900 values).
Shell variables from the config.sh file (written by Configure) are
stored in the readonly-variable %Config, indexed by their names.
Values stored in config.sh as 'undef' are returned as undefined
values. The perl exists function can be used to check if a
named variable exists.
myconfig()-V in Switches in the perlrun manpage.
config_sh()config_vars(@names)name='value';
Names which are unknown are output as name='UNKNOWN';.
See also -V:name in Switches in the perlrun manpage.
Here's a more sophisticated example of using %Config:
use Config;
use strict;
my %sig_num;
my @sig_name;
unless($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 $sig_num{ALRM}\n";
}
Because this information is not stored within the perl executable itself it is possible (but unlikely) that the information does not relate to the actual perl binary which is being used to access it.
The Config module is installed into the architecture and version specific library directory ($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)
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.
_aThis variable defines the extension used for ordinary libraries. For unix, it is .a. The . is included. Other possible values include .lib.
_exeThis variable defines the extension used for executable files. For unix it is empty. Other possible values include .exe.
_oThis variable defines the extension used for object files. For unix, it is .o. The . is included. Other possible values include .obj.
afsThis variable is set to true if AFS (Andrew File System) is used
on the system, false otherwise. It is possible to override this
with a hint value or command line option, but you'd better know
what you are doing.
alignbytesThis 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.
ansi2knrThis variable is set if the user needs to run ansi2knr. Currently, this is not supported, so we just abort.
aphostnameThis 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_revisionThe 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.
F<perl.c>:incpush() and F<lib/lib.pm> will automatically search in
$F<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 C<INSTALL> for 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 F<inc_version_list.U>.
C<XXX> To do: Since compatibility can depend on compile time
options (such as bincompat, longlong, F<etc.>) it should
(perhaps) be set by Configure, but currently it isn't.
Currently, we read a hard-wired value from F<patchlevel.h>.
Perhaps what we ought to do is take the hard-wired value from
F<patchlevel.h> but then modify it if the current Configure
options warrant. F<patchlevel.h> then would use an #ifdef guard.
api_subversionThe 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_versionThe 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_versionstringThis 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.
arThis 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 ar and is not useful.
archlibThis 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.
archlibexpThis variable is the same as the archlib variable, but is filename expanded at configuration time, for convenient use.
archname64This variable is used for the 64-bitness part of $archname.
archnameThis variable is a short name to characterize the current architecture. It is used mainly to construct the default archlib.
archobjsThis 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.
awkThis 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 awk and is not useful.
baserevThe base revision level of this package, from the .package file.
bashThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
binThis 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.
bincompat5005This variable contains y if this version of Perl should be binary-compatible with Perl 5.005.
binexpThis is the same as the bin variable, but is filename expanded at configuration time, for use in your makefiles.
bisonThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
byaccThis 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 byacc and is not useful.
byteorderThis variable holds the byte order. 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 !
cThis 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''.
castflagsThis 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
catThis 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 cat and is not useful.
ccThis 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 cc and gcc.
Fervent ANSI compilers may be called c89. AIX has xlc.
cccdlflagsThis variable contains any special flags that might need to be
passed with cc -c to 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.
ccdlflagsThis 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.
ccflagsThis variable contains any additional C compiler flags desired by the user. It is up to the Makefile to use this.
ccflags_uselargefilesThis variable contains the compiler flags needed by large file builds and added to ccflags by hints files.
ccnameThis 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.
ccsymbolsThe 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.
ccversionThis 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_byLogin 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_emailElectronic 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_timeHolds the output of the date command when the configuration file was
produced. This is used to tag both config.sh and config_h.SH.
charsizeThis variable contains the value of the CHARSIZE symbol, which
indicates to the C program how many bytes there are in a character.
chgrpThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
chmodThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
chownThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
clocktypeThis variable holds the type returned by times(). It can be long,
or clock_t on BSD sites (in which case <sys/types.h> should be
included).
commThis 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 comm and is not useful.
compressThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
CONFIGDOTSHThis is set to true in config.sh so that a shell script
sourcing config.sh can tell if it has been sourced already.
containsThis 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.
cpThis 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 cp and is not useful.
cpioThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
cppThis 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 cpp and is not useful.
cpp_stuffThis variable contains an identification of the catenation mechanism used by the C preprocessor.
cppccsymbolsThe 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.
cppflagsThis variable holds the flags that will be passed to the C pre- processor. It is up to the Makefile to use it.
cpplastThis variable has the same functionality as cppminus, only it applies to cpprun and not cppstdin.
cppminusThis 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 ``''.
cpprunThis 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.
cppstdinThis 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.
cppsymbolsThe 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.
crosscompileThis variable conditionally defines the CROSSCOMPILE symbol
which signifies that the build process is be a cross-compilation.
This is normally set by hints files or from Configure command line.
cryptlibThis 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.
cshThis 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 csh and is not useful.
d__fwalkThis variable conditionally defines HAS__FWALK if _fwalk() is
available to apply a function to all the file handles.
d_accessThis variable conditionally defines HAS_ACCESS if the access() system
call is available to check for access permissions using real IDs.
d_accessxThis variable conditionally defines the HAS_ACCESSX symbol, which
indicates to the C program that the accessx() routine is available.
d_alarmThis variable conditionally defines the HAS_ALARM symbol, which
indicates to the C program that the alarm() routine is available.
d_archlibThis variable conditionally defines ARCHLIB to hold the pathname
of architecture-dependent library files for $package. If
$archlib is the same as $privlib, then this is set to undef.
d_atolfThis variable conditionally defines the HAS_ATOLF symbol, which
indicates to the C program that the atolf() routine is available.
d_atollThis variable conditionally defines the HAS_ATOLL symbol, which
indicates to the C program that the atoll() routine is available.
d_attributThis variable conditionally defines HASATTRIBUTE, which
indicates the C compiler can check for function attributes,
such as printf formats.
d_bcmpThis variable conditionally defines the HAS_BCMP symbol if
the bcmp() routine is available to compare strings.
d_bcopyThis variable conditionally defines the HAS_BCOPY symbol if
the bcopy() routine is available to copy strings.
d_bincompat5005This variable conditionally defines BINCOMPAT5005 so that embed.h can take special action if this version of Perl should be binary-compatible with Perl 5.005. This is impossible for builds that use features like threads and multiplicity it is always $undef for those versions.
d_bsdThis symbol conditionally defines the symbol BSD when running on a
BSD system.
d_bsdgetpgrpThis variable conditionally defines USE_BSD_GETPGRP if
getpgrp needs one arguments whereas USG one needs none.
d_bsdsetpgrpThis variable conditionally defines USE_BSD_SETPGRP if
setpgrp needs two arguments whereas USG one needs none.
See also d_setpgid for a POSIX interface.
d_bzeroThis variable conditionally defines the HAS_BZERO symbol if
the bzero() routine is available to set memory to 0.
d_casti32This variable conditionally defines CASTI32, which indicates whether the C compiler can cast large floats to 32-bit ints.
d_castnegThis variable conditionally defines CASTNEG, which indicates
wether the C compiler can cast negative float to unsigned.
d_charvsprThis variable conditionally defines CHARVSPRINTF if this system
has vsprintf returning type (char*). The trend seems to be to
declare it as ``int vsprintf()''.
d_chownThis variable conditionally defines the HAS_CHOWN symbol, which
indicates to the C program that the chown() routine is available.
d_chrootThis variable conditionally defines the HAS_CHROOT symbol, which
indicates to the C program that the chroot() routine is available.
d_chsizeThis variable conditionally defines the CHSIZE symbol, 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_closedirThis variable conditionally defines HAS_CLOSEDIR if closedir() is
available.
d_constThis variable conditionally defines the HASCONST symbol, which
indicates to the C program that this C compiler knows about the
const type.
d_cryptThis variable conditionally defines the CRYPT symbol, which
indicates to the C program that the crypt() routine is available
to encrypt passwords and the like.
d_cshThis variable conditionally defines the CSH symbol, which
indicates to the C program that the C-shell exists.
d_cuseridThis variable conditionally defines the HAS_CUSERID symbol, which
indicates to the C program that the cuserid() routine is available
to get character login names.
d_dbl_digThis 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_difftimeThis variable conditionally defines the HAS_DIFFTIME symbol, which
indicates to the C program that the difftime() routine is available.
d_dirnamlenThis 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_dlerrorThis variable conditionally defines the HAS_DLERROR symbol, which
indicates to the C program that the dlerror() routine is available.
d_dlopenThis variable conditionally defines the HAS_DLOPEN symbol, which
indicates to the C program that the dlopen() routine is available.
d_dlsymunThis variable conditionally defines DLSYM_NEEDS_UNDERSCORE, which
indicates that we need to prepend an underscore to the symbol
name before calling dlsym().
d_dosuidThis 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_drand48protoThis 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_dup2This variable conditionally defines HAS_DUP2 if dup2() is
available to duplicate file descriptors.
d_eaccessThis variable conditionally defines the HAS_EACCESS symbol, which
indicates to the C program that the eaccess() routine is available.
d_endgrentThis variable conditionally defines the HAS_ENDGRENT symbol, which
indicates to the C program that the endgrent() routine is available
for sequential access of the group database.
d_endhentThis variable conditionally defines HAS_ENDHOSTENT if endhostent() is
available to close whatever was being used for host queries.
d_endnentThis variable conditionally defines HAS_ENDNETENT if endnetent() is
available to close whatever was being used for network queries.
d_endpentThis variable conditionally defines HAS_ENDPROTOENT if endprotoent() is
available to close whatever was being used for protocol queries.
d_endpwentThis variable conditionally defines the HAS_ENDPWENT symbol, which
indicates to the C program that the endpwent() routine is available
for sequential access of the passwd database.
d_endsentThis variable conditionally defines HAS_ENDSERVENT if endservent() is
available to close whatever was being used for service queries.
d_eofnblkThis variable conditionally defines EOF_NONBLOCK if EOF can be seen
when reading from a non-blocking I/O source.
d_euniceThis variable conditionally defines the symbols EUNICE and VAX, which
alerts the C program that it must deal with ideosyncracies of VMS.
d_fchmodThis variable conditionally defines the HAS_FCHMOD symbol, which
indicates to the C program that the fchmod() routine is available
to change mode of opened files.
d_fchownThis variable conditionally defines the HAS_FCHOWN symbol, which
indicates to the C program that the fchown() routine is available
to change ownership of opened files.
d_fcntlThis variable conditionally defines the HAS_FCNTL symbol, and indicates
whether the fcntl() function exists
d_fcntl_can_lockThis variable conditionally defines the FCNTL_CAN_LOCK symbol
and indicates whether file locking with fcntl() works.
d_fd_macrosThis variable contains the eventual value of the HAS_FD_MACROS symbol,
which indicates if your C compiler knows about the macros which
manipulate an fd_set.
d_fd_setThis variable contains the eventual value of the HAS_FD_SET symbol,
which indicates if your C compiler knows about the fd_set typedef.
d_fds_bitsThis variable contains the eventual value of the HAS_FDS_BITS symbol,
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_BITS will let us know how to fix the gaffe.
d_fgetposThis variable conditionally defines HAS_FGETPOS if fgetpos() is
available to get the file position indicator.
d_flexfnamThis variable conditionally defines the FLEXFILENAMES symbol, which
indicates that the system supports filenames longer than 14 characters.
d_flockThis variable conditionally defines HAS_FLOCK if flock() is
available to do file locking.
d_forkThis variable conditionally defines the HAS_FORK symbol, which
indicates to the C program that the fork() routine is available.
d_fpathconfThis variable conditionally defines the HAS_FPATHCONF symbol, 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_fpos64_tThis symbol will be defined if the C compiler supports fpos64_t.
d_frexplThis variable conditionally defines the HAS_FREXPL symbol, which
indicates to the C program that the frexpl() routine is available.
d_fs_data_sThis variable conditionally defines the HAS_STRUCT_FS_DATA symbol,
which indicates that the struct fs_data is supported.
d_fseekoThis variable conditionally defines the HAS_FSEEKO symbol, which
indicates to the C program that the fseeko() routine is available.
d_fsetposThis variable conditionally defines HAS_FSETPOS if fsetpos() is
available to set the file position indicator.
d_fstatfsThis variable conditionally defines the HAS_FSTATFS symbol, which
indicates to the C program that the fstatfs() routine is available.
d_fstatvfsThis variable conditionally defines the HAS_FSTATVFS symbol, which
indicates to the C program that the fstatvfs() routine is available.
d_fsyncThis variable conditionally defines the HAS_FSYNC symbol, which
indicates to the C program that the fsync() routine is available.
d_ftelloThis variable conditionally defines the HAS_FTELLO symbol, which
indicates to the C program that the ftello() routine is available.
d_ftimeThis variable conditionally defines the HAS_FTIME symbol, which indicates
that the ftime() routine exists. The ftime() routine is basically
a sub-second accuracy clock.
d_GconvertThis variable holds what Gconvert is defined as to convert
floating point numbers into strings. It could be gconvert
or a more complex macro emulating gconvert with gcvt() or sprintf.
Possible values are:
d_Gconvert=gconvert((x),(n),(t),(b))
d_Gconvert=gcvt((x),(n),(b))
d_Gconvert=sprintf((b),%.*g,(n),(x))
d_getcwdThis variable conditionally defines the HAS_GETCWD symbol, which
indicates to the C program that the getcwd() routine is available
to get the current working directory.
d_getespwnamThis variable conditionally defines HAS_GETESPWNAM if getespwnam() is
available to retrieve enchanced (shadow) password entries by name.
d_getfsstatThis variable conditionally defines the HAS_GETFSSTAT symbol, which
indicates to the C program that the getfsstat() routine is available.
d_getgrentThis variable conditionally defines the HAS_GETGRENT symbol, which
indicates to the C program that the getgrent() routine is available
for sequential access of the group database.
d_getgrpsThis variable conditionally defines the HAS_GETGROUPS symbol, which
indicates to the C program that the getgroups() routine is available
to get the list of process groups.
d_gethbyaddrThis variable conditionally defines the HAS_GETHOSTBYADDR symbol, which
indicates to the C program that the gethostbyaddr() routine is available
to look up hosts by their IP addresses.
d_gethbynameThis variable conditionally defines the HAS_GETHOSTBYNAME symbol, which
indicates to the C program that the gethostbyname() routine is available
to look up host names in some data base or other.
d_gethentThis variable conditionally defines HAS_GETHOSTENT if gethostent() is
available to look up host names in some data base or another.
d_gethnameThis variable conditionally defines the HAS_GETHOSTNAME symbol, which
indicates to the C program that the gethostname() routine may be
used to derive the host name.
d_gethostprotosThis variable conditionally defines the HAS_GETHOST_PROTOS symbol,
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_getloginThis variable conditionally defines the HAS_GETLOGIN symbol, which
indicates to the C program that the getlogin() routine is available
to get the login name.
d_getmntThis variable conditionally defines the HAS_GETMNT symbol, which
indicates to the C program that the getmnt() routine is available
to retrieve one or more mount info blocks by filename.
d_getmntentThis variable conditionally defines the HAS_GETMNTENT symbol, which
indicates to the C program that the getmntent() routine is available
to iterate through mounted files to get their mount info.
d_getnbyaddrThis variable conditionally defines the HAS_GETNETBYADDR symbol, which
indicates to the C program that the getnetbyaddr() routine is available
to look up networks by their IP addresses.
d_getnbynameThis variable conditionally defines the HAS_GETNETBYNAME symbol, which
indicates to the C program that the getnetbyname() routine is available
to look up networks by their names.
d_getnentThis variable conditionally defines HAS_GETNETENT if getnetent() is
available to look up network names in some data base or another.
d_getnetprotosThis variable conditionally defines the HAS_GETNET_PROTOS symbol,
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_getpagszThis variable conditionally defines HAS_GETPAGESIZE if getpagesize()
is available to get the system page size.
d_getpbynameThis variable conditionally defines the HAS_GETPROTOBYNAME
symbol, which indicates to the C program that the
getprotobyname() routine is available to look up protocols
by their name.
d_getpbynumberThis variable conditionally defines the HAS_GETPROTOBYNUMBER
symbol, which indicates to the C program that the
getprotobynumber() routine is available to look up protocols
by their number.
d_getpentThis variable conditionally defines HAS_GETPROTOENT if getprotoent() is
available to look up protocols in some data base or another.
d_getpgidThis variable conditionally defines the HAS_GETPGID symbol, which
indicates to the C program that the getpgid(pid) function
is available to get the process group id.
d_getpgrp2This 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_getpgrpThis variable conditionally defines HAS_GETPGRP if getpgrp() is
available to get the current process group.
d_getppidThis variable conditionally defines the HAS_GETPPID symbol, which
indicates to the C program that the getppid() routine is available
to get the parent process ID.
d_getpriorThis variable conditionally defines HAS_GETPRIORITY if getpriority()
is available to get a process's priority.
d_getprotoprotosThis variable conditionally defines the HAS_GETPROTO_PROTOS symbol,
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_getprpwnamThis variable conditionally defines HAS_GETPRPWNAM if getprpwnam() is
available to retrieve protected (shadow) password entries by name.
d_getpwentThis variable conditionally defines the HAS_GETPWENT symbol, which
indicates to the C program that the getpwent() routine is available
for sequential access of the passwd database.
d_getsbynameThis variable conditionally defines the HAS_GETSERVBYNAME
symbol, which indicates to the C program that the
getservbyname() routine is available to look up services
by their name.
d_getsbyportThis variable conditionally defines the HAS_GETSERVBYPORT
symbol, which indicates to the C program that the
getservbyport() routine is available to look up services
by their port.
d_getsentThis variable conditionally defines HAS_GETSERVENT if getservent() is
available to look up network services in some data base or another.
d_getservprotosThis variable conditionally defines the HAS_GETSERV_PROTOS symbol,
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_getspnamThis variable conditionally defines HAS_GETSPNAM if getspnam() is
available to retrieve SysV shadow password entries by name.
d_gettimeodThis variable conditionally defines the HAS_GETTIMEOFDAY symbol, which
indicates that the gettimeofday() system call exists (to obtain a
sub-second accuracy clock). You should probably include <sys/resource.h>.
d_gnulibcDefined if we're dealing with the GNU C Library.
d_grpasswdThis variable conditionally defines GRPASSWD, which indicates
that struct group in <grp.h> contains gr_passwd.
d_hasmntoptThis variable conditionally defines the HAS_HASMNTOPT symbol, which
indicates to the C program that the hasmntopt() routine is available
to query the mount options of file systems.
d_htonlThis variable conditionally defines HAS_HTONL if htonl() and its
friends are available to do network order byte swapping.
d_iconvThis variable conditionally defines the HAS_ICONV symbol, which
indicates to the C program that the iconv() routine is available.
d_indexThis variable conditionally defines HAS_INDEX if index() and
rindex() are available for string searching.
d_inetatonThis variable conditionally defines the HAS_INET_ATON symbol, which
indicates to the C program that the inet_aton() function is available
to parse IP address dotted-quad strings.
d_int64_tThis symbol will be defined if the C compiler supports int64_t.
d_isasciiThis variable conditionally defines the HAS_ISASCII constant,
which indicates to the C program that isascii() is available.
d_isnanThis variable conditionally defines the HAS_ISNAN symbol, which
indicates to the C program that the isnan() routine is available.
d_isnanlThis variable conditionally defines the HAS_ISNANL symbol, which
indicates to the C program that the isnanl() routine is available.
d_killpgThis variable conditionally defines the HAS_KILLPG symbol, which
indicates to the C program that the killpg() routine is available
to kill process groups.
d_lchownThis variable conditionally defines the HAS_LCHOWN symbol, 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_digThis 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_linkThis variable conditionally defines HAS_LINK if link() is
available to create hard links.
d_locconvThis variable conditionally defines HAS_LOCALECONV if localeconv() is
available for numeric and monetary formatting conventions.
d_lockfThis variable conditionally defines HAS_LOCKF if lockf() is
available to do file locking.
d_longdblThis variable conditionally defines HAS_LONG_DOUBLE if
the long double type is supported.
d_longlongThis variable conditionally defines HAS_LONG_LONG if
the long long type is supported.
d_lseekprotoThis variable conditionally defines the HAS_LSEEK_PROTO symbol,
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_lstatThis variable conditionally defines HAS_LSTAT if lstat() is
available to do file stats on symbolic links.
d_madviseThis variable conditionally defines HAS_MADVISE if madvise() is
available to map a file into memory.
d_mblenThis variable conditionally defines the HAS_MBLEN symbol, which
indicates to the C program that the mblen() routine is available
to find the number of bytes in a multibye character.
d_mbstowcsThis variable conditionally defines the HAS_MBSTOWCS symbol, which
indicates to the C program that the mbstowcs() routine is available
to convert a multibyte string into a wide character string.
d_mbtowcThis variable conditionally defines the HAS_MBTOWC symbol, which
indicates to the C program that the mbtowc() routine is available
to convert multibyte to a wide character.
d_memchrThis variable conditionally defines the HAS_MEMCHR symbol, which
indicates to the C program that the memchr() routine is available
to locate characters within a C string.
d_memcmpThis variable conditionally defines the HAS_MEMCMP symbol, which
indicates to the C program that the memcmp() routine is available
to compare blocks of memory.
d_memcpyThis variable conditionally defines the HAS_MEMCPY symbol, which
indicates to the C program that the memcpy() routine is available
to copy blocks of memory.
d_memmoveThis variable conditionally defines the HAS_MEMMOVE symbol, which
indicates to the C program that the memmove() routine is available
to copy potentatially overlapping blocks of memory.
d_memsetThis variable conditionally defines the HAS_MEMSET symbol, which
indicates to the C program that the memset() routine is available
to set blocks of memory.
d_mkdirThis variable conditionally defines the HAS_MKDIR symbol, which
indicates to the C program that the mkdir() routine is available
to create directories..
d_mkdtempThis variable conditionally defines the HAS_MKDTEMP symbol, which
indicates to the C program that the mkdtemp() routine is available
to exclusively create a uniquely named temporary directory.
d_mkfifoThis variable conditionally defines the HAS_MKFIFO symbol, which
indicates to the C program that the mkfifo() routine is available.
d_mkstempThis variable conditionally defines the HAS_MKSTEMP symbol, which
indicates to the C program that the mkstemp() routine is available
to exclusively create and open a uniquely named temporary file.
d_mkstempsThis variable conditionally defines the HAS_MKSTEMPS symbol, 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_mktimeThis variable conditionally defines the HAS_MKTIME symbol, which
indicates to the C program that the mktime() routine is available.
d_mmapThis variable conditionally defines HAS_MMAP if mmap() is
available to map a file into memory.
d_modflThis variable conditionally defines the HAS_MODFL symbol, which
indicates to the C program that the modfl() routine is available.
d_mprotectThis variable conditionally defines HAS_MPROTECT if mprotect() is
available to modify the access protection of a memory mapped file.
d_msgThis variable conditionally defines the HAS_MSG symbol, which
indicates that the entire msg*(2) library is present.
d_msg_ctruncThis variable conditionally defines the HAS_MSG_CTRUNC symbol,
which indicates that the MSG_CTRUNC is available. #ifdef is
not enough because it may be an enum, glibc has been known to do this.
d_msg_dontrouteThis variable conditionally defines the HAS_MSG_DONTROUTE symbol,
which indicates that the MSG_DONTROUTE is available. #ifdef is
not enough because it may be an enum, glibc has been known to do this.
d_msg_oobThis variable conditionally defines the HAS_MSG_OOB symbol,
which indicates that the MSG_OOB is available. #ifdef is
not enough because it may be an enum, glibc has been known to do this.
d_msg_peekThis variable conditionally defines the HAS_MSG_PEEK symbol,
which indicates that the MSG_PEEK is available. #ifdef is
not enough because it may be an enum, glibc has been known to do this.
d_msg_proxyThis variable conditionally defines the HAS_MSG_PROXY symbol,
which indicates that the MSG_PROXY is available. #ifdef is
not enough because it may be an enum, glibc has been known to do this.
d_msgctlThis variable conditionally defines the HAS_MSGCTL symbol, which
indicates to the C program that the msgctl() routine is available.
d_msggetThis variable conditionally defines the HAS_MSGGET symbol, which
indicates to the C program that the msgget() routine is available.
d_msgrcvThis variable conditionally defines the HAS_MSGRCV symbol, which
indicates to the C program that the msgrcv() routine is available.
d_msgsndThis variable conditionally defines the HAS_MSGSND symbol, which
indicates to the C program that the msgsnd() routine is available.
d_msyncThis variable conditionally defines HAS_MSYNC if msync() is
available to synchronize a mapped file.
d_munmapThis variable conditionally defines HAS_MUNMAP if munmap() is
available to unmap a region mapped by mmap().
d_mymallocThis variable conditionally defines MYMALLOC in case other parts
of the source want to take special action if MYMALLOC is used.
This may include different sorts of profiling or error detection.
d_niceThis variable conditionally defines the HAS_NICE symbol, which
indicates to the C program that the nice() routine is available.
d_nv_preserves_uvThis variable indicates whether a variable of type nvtype can preserve all the bits a variable of type uvtype.
d_nv_preserves_uv_bitsThis variable indicates how many of bits type uvtype a variable nvtype can preserve.
d_off64_tThis symbol will be defined if the C compiler supports off64_t.
d_old_pthread_create_joinableThis variable conditionally defines pthread_create_joinable.
undef if pthread.h defines PTHREAD_CREATE_JOINABLE.
d_oldpthreadsThis variable conditionally defines the OLD_PTHREADS_API symbol,
and indicates that Perl should be built to use the old
draft POSIX threads API. This is only potentially meaningful if
usethreads is set.
d_oldsockThis variable conditionally defines the OLDSOCKET symbol, which
indicates that the BSD socket interface is based on 4.1c and not 4.2.
d_open3This 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_pathconfThis variable conditionally defines the HAS_PATHCONF symbol, 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_pauseThis variable conditionally defines the HAS_PAUSE symbol, which
indicates to the C program that the pause() routine is available
to suspend a process until a signal is received.
d_perl_otherlibdirsThis 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_phostnameThis variable conditionally defines the HAS_PHOSTNAME symbol, which
contains the shell command which, when fed to popen(), may be
used to derive the host name.
d_pipeThis variable conditionally defines the HAS_PIPE symbol, which
indicates to the C program that the pipe() routine is available
to create an inter-process channel.
d_pollThis variable conditionally defines the HAS_POLL symbol, which
indicates to the C program that the poll() routine is available
to poll active file descriptors.
d_portableThis variable conditionally defines the PORTABLE symbol, which
indicates to the C program that it should not assume that it is
running on the machine it was compiled on.
d_PRId64This variable conditionally defines the PERL_PRId64 symbol, which indiciates that stdio has a symbol to print 64-bit decimal numbers.
d_PRIeldblThis variable conditionally defines the PERL_PRIfldbl symbol, which indiciates that stdio has a symbol to print long doubles.
d_PRIEUldblThis variable conditionally defines the PERL_PRIfldbl symbol, which
indiciates that stdio has a symbol to print long doubles.
The U in the name is to separate this from d_PRIeldbl so that even
case-blind systems can see the difference.
d_PRIfldblThis variable conditionally defines the PERL_PRIfldbl symbol, which indiciates that stdio has a symbol to print long doubles.
d_PRIFUldblThis variable conditionally defines the PERL_PRIfldbl symbol, which
indiciates that stdio has a symbol to print long doubles.
The U in the name is to separate this from d_PRIfldbl so that even
case-blind systems can see the difference.
d_PRIgldblThis variable conditionally defines the PERL_PRIfldbl symbol, which indiciates that stdio has a symbol to print long doubles.
d_PRIGUldblThis variable conditionally defines the PERL_PRIfldbl symbol, which
indiciates that stdio has a symbol to print long doubles.
The U in the name is to separate this from d_PRIgldbl so that even
case-blind systems can see the difference.
d_PRIi64This variable conditionally defines the PERL_PRIi64 symbol, which indiciates that stdio has a symbol to print 64-bit decimal numbers.
d_PRIo64This variable conditionally defines the PERL_PRIo64 symbol, which indiciates that stdio has a symbol to print 64-bit octal numbers.
d_PRIu64This variable conditionally defines the PERL_PRIu64 symbol, which indiciates that stdio has a symbol to print 64-bit unsigned decimal numbers.
d_PRIx64This variable conditionally defines the PERL_PRIx64 symbol, which indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
d_PRIXU64This variable conditionally defines the PERL_PRIXU64 symbol, which
indiciates that stdio has a symbol to print 64-bit hExADECimAl numbers.
The U in the name is to separate this from d_PRIx64 so that even
case-blind systems can see the difference.
d_pthread_atforkThis variable conditionally defines the HAS_PTHREAD_ATFORK symbol,
which indicates to the C program that the pthread_atfork()
routine is available.
d_pthread_yieldThis variable conditionally defines the HAS_PTHREAD_YIELD
symbol if the pthread_yield routine is available to yield
the execution of the current thread.
d_pwageThis variable conditionally defines PWAGE, which indicates
that struct passwd contains pw_age.
d_pwchangeThis variable conditionally defines PWCHANGE, which indicates
that struct passwd contains pw_change.
d_pwclassThis variable conditionally defines PWCLASS, which indicates
that struct passwd contains pw_class.
d_pwcommentThis variable conditionally defines PWCOMMENT, which indicates
that struct passwd contains pw_comment.
d_pwexpireThis variable conditionally defines PWEXPIRE, which indicates
that struct passwd contains pw_expire.
d_pwgecosThis variable conditionally defines PWGECOS, which indicates
that struct passwd contains pw_gecos.
d_pwpasswdThis variable conditionally defines PWPASSWD, which indicates
that struct passwd contains pw_passwd.
d_pwquotaThis variable conditionally defines PWQUOTA, which indicates
that struct passwd contains pw_quota.
d_qgcvtThis variable conditionally defines the HAS_QGCVT symbol, which
indicates to the C program that the qgcvt() routine is available.
d_quadThis variable, if defined, tells that there's a 64-bit integer type, quadtype.
d_readdirThis variable conditionally defines HAS_READDIR if readdir() is
available to read directory entries.
d_readlinkThis variable conditionally defines the HAS_READLINK symbol, which
indicates to the C program that the readlink() routine is available
to read the value of a symbolic link.
d_renameThis variable conditionally defines the HAS_RENAME symbol, which
indicates to the C program that the rename() routine is available
to rename files.
d_rewinddirThis variable conditionally defines HAS_REWINDDIR if rewinddir() is
available.
d_rmdirThis variable conditionally defines HAS_RMDIR if rmdir() is
available to remove directories.
d_safebcpyThis variable conditionally defines the HAS_SAFE_BCOPY symbol if
the bcopy() routine can do overlapping copies.
d_safemcpyThis variable conditionally defines the HAS_SAFE_MEMCPY symbol if
the memcpy() routine can do overlapping copies.
d_sanemcmpThis variable conditionally defines the HAS_SANE_MEMCMP symbol if
the memcpy() routine is available and can be used to compare relative
magnitudes of chars with their high bits set.
d_sbrkprotoThis variable conditionally defines the HAS_SBRK_PROTO symbol,
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_sched_yieldThis variable conditionally defines the HAS_SCHED_YIELD
symbol if the sched_yield routine is available to yield
the execution of the current thread.
d_scm_rightsThis variable conditionally defines the HAS_SCM_RIGHTS symbol,
which indicates that the SCM_RIGHTS is available. #ifdef is
not enough because it may be an enum, glibc has been known to do this.
d_SCNfldblThis variable conditionally defines the PERL_PRIfldbl symbol, which indiciates that stdio has a symbol to scan long doubles.
d_seekdirThis variable conditionally defines HAS_SEEKDIR if seekdir() is
available.
d_selectThis variable conditionally defines HAS_SELECT if select() is
available to select active file descriptors. A <sys/time.h>
inclusion may be necessary for the timeout field.
d_semThis variable conditionally defines the HAS_SEM symbol, which
indicates that the entire sem*(2) library is present.
d_semctlThis variable conditionally defines the HAS_SEMCTL symbol, which
indicates to the C program that the semctl() routine is available.
d_semctl_semid_dsThis variable conditionally defines USE_SEMCTL_SEMID_DS, which
indicates that struct semid_ds * is to be used for semctl IPC_STAT.
d_semctl_semunThis variable conditionally defines USE_SEMCTL_SEMUN, which
indicates that union semun is to be used for semctl IPC_STAT.
d_semgetThis variable conditionally defines the HAS_SEMGET symbol, which
indicates to the C program that the semget() routine is available.
d_semopThis variable conditionally defines the HAS_SEMOP symbol, which
indicates to the C program that the semop() routine is available.
d_setegidThis variable conditionally defines the HAS_SETEGID symbol, which
indicates to the C program that the setegid() routine is available
to change the effective gid of the current program.
d_seteuidThis variable conditionally defines the HAS_SETEUID symbol, which
indicates to the C program that the seteuid() routine is available
to change the effective uid of the current program.
d_setgrentThis variable conditionally defines the HAS_SETGRENT symbol, which
indicates to the C program that the setgrent() routine is available
for initializing sequential access to the group database.
d_setgrpsThis variable conditionally defines the HAS_SETGROUPS symbol, which
indicates to the C program that the setgroups() routine is available
to set the list of process groups.
d_sethentThis variable conditionally defines HAS_SETHOSTENT if sethostent() is
available.
d_setlinebufThis variable conditionally defines the HAS_SETLINEBUF symbol, 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_setlocaleThis variable conditionally defines HAS_SETLOCALE if setlocale() is
available to handle locale-specific ctype implementations.
d_setnentThis variable conditionally defines HAS_SETNETENT if setnetent() is
available.
d_setpentThis variable conditionally defines HAS_SETPROTOENT if setprotoent() is
available.
d_setpgidThis variable conditionally defines the HAS_SETPGID symbol if the
setpgid(pid, gpid) function is available to set process group ID.
d_setpgrp2This 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_setpgrpThis variable conditionally defines HAS_SETPGRP if setpgrp() is
available to set the current process group.
d_setpriorThis variable conditionally defines HAS_SETPRIORITY if setpriority()
is available to set a process's priority.
d_setproctitleThis variable conditionally defines the HAS_SETPROCTITLE symbol,
which indicates to the C program that the setproctitle() routine
is available.
d_setpwentThis variable conditionally defines the HAS_SETPWENT symbol, which
indicates to the C program that the setpwent() routine is available
for initializing sequential access to the passwd database.
d_setregidThis variable conditionally defines HAS_SETREGID if setregid() is
available to change the real and effective gid of the current
process.
d_setresgidThis variable conditionally defines HAS_SETRESGID if setresgid() is
available to change the real, effective and saved gid of the current
process.
d_setresuidThis variable conditionally defines HAS_SETREUID if setresuid() is
available to change the real, effective and saved uid of the current
process.
d_setreuidThis variable conditionally defines HAS_SETREUID if setreuid() is
available to change the real and effective uid of the current
process.
d_setrgidThis variable conditionally defines the HAS_SETRGID symbol, which
indicates to the C program that the setrgid() routine is available
to change the real gid of the current program.
d_setruidThis variable conditionally defines the HAS_SETRUID symbol, which
indicates to the C program that the setruid() routine is available
to change the real uid of the current program.
d_setsentThis variable conditionally defines HAS_SETSERVENT if setservent() is
available.
d_setsidThis variable conditionally defines HAS_SETSID if setsid() is
available to set the process group ID.
d_setvbufThis variable conditionally defines the HAS_SETVBUF symbol, which
indicates to the C program that the setvbuf() routine is available
to change buffering on an open stdio stream.
d_sfioThis variable conditionally defines the USE_SFIO symbol,
and indicates whether sfio is available (and should be used).
d_shmThis variable conditionally defines the HAS_SHM symbol, which
indicates that the entire shm*(2) library is present.
d_shmatThis variable conditionally defines the HAS_SHMAT symbol, which
indicates to the C program that the shmat() routine is available.
d_shmatprototypeThis variable conditionally defines the HAS_SHMAT_PROTOTYPE
symbol, which indicates that sys/shm.h has a prototype for
shmat.
d_shmctlThis variable conditionally defines the HAS_SHMCTL symbol, which
indicates to the C program that the shmctl() routine is available.
d_shmdtThis variable conditionally defines the HAS_SHMDT symbol, which
indicates to the C program that the shmdt() routine is available.
d_shmgetThis variable conditionally defines the HAS_SHMGET symbol, which
indicates to the C program that the shmget() routine is available.
d_sigactionThis variable conditionally defines the HAS_SIGACTION symbol, which
indicates that the Vr4 sigaction() routine is available.
d_sigprocmaskThis variable conditionally defines HAS_SIGPROCMASK
if sigprocmask() is available to examine or change the signal mask
of the calling process.
d_sigsetjmpThis variable conditionally defines the HAS_SIGSETJMP symbol,
which indicates that the sigsetjmp() routine is available to
call setjmp() and optionally save the process's signal mask.
d_socketThis variable conditionally defines HAS_SOCKET, which indicates
that the BSD socket interface is supported.
d_socklen_tThis symbol will be defined if the C compiler supports socklen_t.
d_sockpairThis variable conditionally defines the HAS_SOCKETPAIR symbol, which
indicates that the BSD socketpair() is supported.
d_socks5_initThis variable conditionally defines the HAS_SOCKS5_INIT symbol, which
indicates to the C program that the socks5_init() routine is available.
d_sqrtlThis variable conditionally defines the HAS_SQRTL symbol, which
indicates to the C program that the sqrtl() routine is available.
d_statblksThis variable conditionally defines USE_STAT_BLOCKS
if this system has a stat structure declaring
st_blksize and st_blocks.
d_statfs_f_flagsThis variable conditionally defines the HAS_STRUCT_STATFS_F_FLAGS
symbol, 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_sThis variable conditionally defines the HAS_STRUCT_STATFS symbol,
which indicates that the struct statfs is supported.
d_statvfsThis variable conditionally defines the HAS_STATVFS symbol, which
indicates to the C program that the statvfs() routine is available.
d_stdio_cnt_lvalThis variable conditionally defines STDIO_CNT_LVALUE if the
FILE_cnt macro can be used as an lvalue.
d_stdio_ptr_lvalThis variable conditionally defines STDIO_PTR_LVALUE if the
FILE_ptr macro can be used as an lvalue.
d_stdio_ptr_lval_nochange_cntThis symbol is defined if using the FILE_ptr macro as an lvalue
to increase the pointer by n leaves File_cnt(fp) unchanged.
d_stdio_ptr_lval_sets_cntThis symbol is defined if using the FILE_ptr macro 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_arrayThis variable tells whether there is an array holding the stdio streams.
d_stdiobaseThis variable conditionally defines USE_STDIO_BASE if this system
has a FILE structure declaring a usable _base field (or equivalent)
in stdio.h.
d_stdstdioThis variable conditionally defines USE_STDIO_PTR if this system
has a FILE structure declaring usable _ptr and _cnt fields (or
equivalent) in stdio.h.
d_strchrThis variable conditionally defines HAS_STRCHR if strchr() and
strrchr() are available for string searching.
d_strcollThis variable conditionally defines HAS_STRCOLL if strcoll() is
available to compare strings using collating information.
d_strctcpyThis variable conditionally defines the USE_STRUCT_COPY symbol, which
indicates to the C program that this C compiler knows how to copy
structures.
d_strerrmThis variable holds what Strerrr is defined as to translate an error
code condition into an error message string. It could be strerror
or a more complex macro emulating strrror with sys_errlist[], or the
unknown string when both strerror and sys_errlist are missing.
d_strerrorThis variable conditionally defines HAS_STRERROR if strerror() is
available to translate error numbers to strings.
d_strtodThis variable conditionally defines the HAS_STRTOD symbol, which
indicates to the C program that the strtod() routine is available
to provide better numeric string conversion than atof().
d_strtolThis variable conditionally defines the HAS_STRTOL symbol, which
indicates to the C program that the strtol() routine is available
to provide better numeric string conversion than atoi() and friends.
d_strtoldThis variable conditionally defines the HAS_STRTOLD symbol, which
indicates to the C program that the strtold() routine is available.
d_strtollThis variable conditionally defines the HAS_STRTOLL symbol, which
indicates to the C program that the strtoll() routine is available.
d_strtoqThis variable conditionally defines the HAS_STRTOQ symbol, which
indicates to the C program that the strtoq() routine is available.
d_strtoulThis variable conditionally defines the HAS_STRTOUL symbol, which
indicates to the C program that the strtoul() routine is available
to provide conversion of strings to unsigned long.
d_strtoullThis variable conditionally defines the HAS_STRTOULL symbol, which
indicates to the C program that the strtoull() routine is available.
d_strtouqThis variable conditionally defines the HAS_STRTOUQ symbol, which
indicates to the C program that the strtouq() routine is available.
d_strxfrmThis variable conditionally defines HAS_STRXFRM if strxfrm() is
available to transform strings.
d_suidsafeThis variable conditionally defines SETUID_SCRIPTS_ARE_SECURE_NOW
if setuid scripts can be secure. This test looks in /dev/fd/.
d_symlinkThis variable conditionally defines the HAS_SYMLINK symbol, which
indicates to the C program that the symlink() routine is available
to create symbolic links.
d_syscallThis variable conditionally defines HAS_SYSCALL if syscall() is
available call arbitrary system calls.
d_sysconfThis variable conditionally defines the HAS_SYSCONF symbol, which
indicates to the C program that the sysconf() routine is available
to determine system related limits and options.
d_sysernlstThis variable conditionally defines HAS_SYS_ERRNOLIST if sys_errnolist[]
is available to translate error numbers to the symbolic name.
d_syserrlstThis variable conditionally defines HAS_SYS_ERRLIST if sys_errlist[] is
available to translate error numbers to strings.
d_systemThis variable conditionally defines HAS_SYSTEM if system() is
available to issue a shell command.
d_tcgetpgrpThis variable conditionally defines the HAS_TCGETPGRP symbol, which
indicates to the C program that the tcgetpgrp() routine is available.
to get foreground process group ID.
d_tcsetpgrpThis variable conditionally defines the HAS_TCSETPGRP symbol, which
indicates to the C program that the tcsetpgrp() routine is available
to set foreground process group ID.
d_telldirThis variable conditionally defines HAS_TELLDIR if telldir() is
available.
d_telldirprotoThis variable conditionally defines the HAS_TELLDIR_PROTO symbol,
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_timeThis variable conditionally defines the HAS_TIME symbol, which indicates
that the time() routine exists. The time() routine is normaly
provided on UNIX systems.
d_timesThis variable conditionally defines the HAS_TIMES symbol, which indicates
that the times() routine exists. The times() routine is normaly
provided on UNIX systems. You may have to include <sys/times.h>.
d_truncateThis variable conditionally defines HAS_TRUNCATE if truncate() is
available to truncate files.
d_tznameThis variable conditionally defines HAS_TZNAME if tzname[] is
available to access timezone names.
d_umaskThis variable conditionally defines the HAS_UMASK symbol, which
indicates to the C program that the umask() routine is available.
to set and get the value of the file creation mask.
d_unameThis variable conditionally defines the HAS_UNAME symbol, which
indicates to the C program that the uname() routine may be
used to derive the host name.
d_union_semunThis variable conditionally defines HAS_UNION_SEMUN if the
union semun is defined by including <sys/sem.h>.
d_ustatThis variable conditionally defines HAS_USTAT if ustat() is
available to query file system statistics by dev_t.
d_vendorarchThis variable conditionally defined PERL_VENDORARCH.
d_vendorbinThis variable conditionally defines PERL_VENDORBIN.
d_vendorlibThis variable conditionally defines PERL_VENDORLIB.
d_vforkThis variable conditionally defines the HAS_VFORK symbol, which
indicates the vfork() routine is available.
d_void_closedirThis variable conditionally defines VOID_CLOSEDIR if closedir()
does not return a value.
d_voidsigThis variable conditionally defines VOIDSIG if this system
declares ``void (*signal(...))()'' in signal.h. The old way was to
declare it as ``int (*signal(...))()''.
d_voidttyThis variable conditionally defines USE_IOCNOTTY to indicate that the
ioctl() call with TIOCNOTTY should be used to void tty association.
Otherwise (on USG probably), it is enough to close the standard file
decriptors and do a setpgrp().
d_volatileThis variable conditionally defines the HASVOLATILE symbol, which
indicates to the C program that this C compiler knows about the
volatile declaration.
d_vprintfThis variable conditionally defines the HAS_VPRINTF symbol, which
indicates to the C program that the vprintf() routine is available
to printf with a pointer to an argument list.
d_wait4This variable conditionally defines the HAS_WAIT4 symbol, which
indicates the wait4() routine is available.
d_waitpidThis variable conditionally defines HAS_WAITPID if waitpid() is
available to wait for child process.
d_wcstombsThis variable conditionally defines the HAS_WCSTOMBS symbol, which
indicates to the C program that the wcstombs() routine is available
to convert wide character strings to multibyte strings.
d_wctombThis variable conditionally defines the HAS_WCTOMB symbol, which
indicates to the C program that the wctomb() routine is available
to convert a wide character to a multibyte.
d_xenixThis variable conditionally defines the symbol XENIX, which alerts
the C program that it runs under Xenix.
dateThis 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 date and is not useful.
db_hashtypeThis 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_prefixtypeThis 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.
defvoidusedThis variable contains the default value of the VOIDUSED symbol (15).
direntrytypeThis symbol is set to struct direct or struct dirent depending on
whether dirent is available or not. You should use this pseudo type to
portably declare your directory entries.
dlextThis variable contains the extension that is to be used for the dynamically loaded modules that perl generaties.
dlsrcThis variable contains the name of the dynamic loading file that will be used with the package.
doublesizeThis variable contains the value of the DOUBLESIZE symbol, which
indicates to the C program how many bytes there are in a double.
drand01Indicates 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 Drand01 is mapped to drand01.
dynamic_extThis variable holds a list of XS extension files we want to
link dynamically into the package. It is used by Makefile.
eagainThis 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).
ebcdicThis variable conditionally defines EBCDIC if this
system uses EBCDIC encoding. Among other things, this
means that the character ranges are not contiguous.
See trnl.U
echoThis 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 echo and is not useful.
egrepThis 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 egrep and is not useful.
emacsThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
eunicefixWhen 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_extThis is an old synonym for _exe.
exprThis 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 expr and is not useful.
extensionsThis variable holds a list of all extension files (both XS and
non-xs linked into the package. It is propagated to Config.pm
and is typically used to test whether a particular extesion
is available.
fflushallThis 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.
fflushNULLThis symbol, if defined, tells that fflush(NULL) does flush
all pending stdio output.
findThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
firstmakefileThis 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.
flexThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
fpossizeThis variable contains the size of a fpostype in bytes.
fpostypeThis variable defines Fpos_t to be something like fpos_t, long, uint, or whatever type is used to declare file positions in libc.
freetypeThis variable contains the return type of free(). It is usually void, but occasionally int.
full_arThis variable contains the full pathname to ar, whether or
not the user has specified portability. This is only used
in the Makefile.SH.
full_cshThis variable contains the full pathname to csh, whether or
not the user has specified portability. 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_sedThis variable contains the full pathname to sed, whether or
not the user has specified portability. 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.
gccosandversIf GNU cc (gcc) is used, this variable the operating system and
version used to compile the gcc. It is set to '' if not gcc,
or if nothing useful can be parsed as the os version.
gccversionIf GNU cc (gcc) is used, this variable holds 1 or 2 to
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.
gidformatThis variable contains the format string used for printing a Gid_t.
gidsignThis variable contains the signedness of a gidtype. 1 for unsigned, -1 for signed.
gidsizeThis variable contains the size of a gidtype in bytes.
gidtypeThis 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.
glibpthThis 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.
grepThis 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 grep and is not useful.
groupcatThis 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 NIS is used.
On some systems, such as os390, there may be no equivalent
command, in which case this variable is unset.
groupstypeThis 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.
gzipThis 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 gzip and is not useful.
h_fcntlThis is variable gets set in various places to tell i_fcntl that <fcntl.h> should be included.
h_sysfileThis is variable gets set in various places to tell i_sys_file that <sys/file.h> should be included.
hintGives the type of hints used for previous answers. May be one of
default, recommended or previous.
hostcatThis 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 NIS is used.
On some systems, such as os390, there may be no equivalent
command, in which case this variable is unset.
i16sizeThis variable is the size of an I16 in bytes.
i16typeThis variable contains the C type used for Perl's I16.
i32sizeThis variable is the size of an I32 in bytes.
i32typeThis variable contains the C type used for Perl's I32.
i64sizeThis variable is the size of an I64 in bytes.
i64typeThis variable contains the C type used for Perl's I64.
i8sizeThis variable is the size of an I8 in bytes.
i8typeThis variable contains the C type used for Perl's I8.
i_arpainetThis variable conditionally defines the I_ARPA_INET symbol,
and indicates whether a C program should include <arpa/inet.h>.
i_bsdioctlThis variable conditionally defines the I_SYS_BSDIOCTL symbol, which
indicates to the C program that <sys/bsdioctl.h> exists and should
be included.
i_dbThis variable conditionally defines the I_DB symbol, and indicates
whether a C program may include Berkeley's DB include file <db.h>.
i_dbmThis variable conditionally defines the I_DBM symbol, which
indicates to the C program that <dbm.h> exists and should
be included.
i_direntThis variable conditionally defines I_DIRENT, which indicates
to the C program that it should include <dirent.h>.
i_dldThis variable conditionally defines the I_DLD symbol, which
indicates to the C program that <dld.h> (GNU dynamic loading)
exists and should be included.
i_dlfcnThis variable conditionally defines the I_DLFCN symbol, which
indicates to the C program that <dlfcn.h> exists and should
be included.
i_fcntlThis variable controls the value of I_FCNTL (which tells
the C program to include <fcntl.h>).
i_floatThis variable conditionally defines the I_FLOAT symbol, and indicates
whether a C program may include <float.h> to get symbols like DBL_MAX
or DBL_MIN, i.e. machine dependent floating point values.
i_gdbmThis variable conditionally defines the I_GDBM symbol, which
indicates to the C program that <gdbm.h> exists and should
be included.
i_grpThis variable conditionally defines the I_GRP symbol, and indicates
whether a C program should include <grp.h>.
i_iconvThis variable conditionally defines the I_ICONV symbol, and indicates
whether a C program should include <iconv.h>.
i_ieeefpThis variable conditionally defines the I_IEEEFP symbol, and indicates
whether a C program should include <ieeefp.h>.
i_inttypesThis variable conditionally defines the I_INTTYPES symbol,
and indicates whether a C program should include <inttypes.h>.
i_libutilThis variable conditionally defines the I_LIBUTIL symbol, and indicates
whether a C program should include <libutil.h>.
i_limitsThis variable conditionally defines the I_LIMITS symbol, and indicates
whether a C program may include <limits.h> to get symbols like WORD_BIT
and friends.
i_localeThis variable conditionally defines the I_LOCALE symbol,
and indicates whether a C program should include <locale.h>.
i_machcthrThis variable conditionally defines the I_MACH_CTHREADS symbol,
and indicates whether a C program should include <mach/cthreads.h>.
i_mallocThis variable conditionally defines the I_MALLOC symbol, and indicates
whether a C program should include <malloc.h>.
i_mathThis variable conditionally defines the I_MATH symbol, and indicates
whether a C program may include <math.h>.
i_memoryThis variable conditionally defines the I_MEMORY symbol, and indicates
whether a C program should include <memory.h>.
i_mntentThis variable conditionally defines the I_MNTENT symbol, and indicates
whether a C program should include <mntent.h>.
i_ndbmThis variable conditionally defines the I_NDBM symbol, which
indicates to the C program that <ndbm.h> exists and should
be included.
i_netdbThis variable conditionally defines the I_NETDB symbol, and indicates
whether a C program should include <netdb.h>.
i_neterrnoThis variable conditionally defines the I_NET_ERRNO symbol, which
indicates to the C program that <net/errno.h> exists and should
be included.
i_netinettcpThis variable conditionally defines the I_NETINET_TCP symbol,
and indicates whether a C program should include <netinet/tcp.h>.
i_niinThis 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_pollThis variable conditionally defines the I_POLL symbol, and indicates
whether a C program should include <poll.h>.
i_protThis variable conditionally defines the I_PROT symbol, and indicates
whether a C program should include <prot.h>.
i_pthreadThis variable conditionally defines the I_PTHREAD symbol,
and indicates whether a C program should include <pthread.h>.
i_pwdThis variable conditionally defines I_PWD, which indicates
to the C program that it should include <pwd.h>.
i_rpcsvcdbmThis variable conditionally defines the I_RPCSVC_DBM symbol, 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_sfioThis variable conditionally defines the I_SFIO symbol,
and indicates whether a C program should include <sfio.h>.
i_sgttyThis variable conditionally defines the I_SGTTY symbol, which
indicates to the C program that it should include <sgtty.h> rather
than <termio.h>.
i_shadowThis variable conditionally defines the I_SHADOW symbol, and indicates
whether a C program should include <shadow.h>.
i_socksThis variable conditionally defines the I_SOCKS symbol, and indicates
whether a C program should include <socks.h>.
i_stdargThis variable conditionally defines the I_STDARG symbol, which
indicates to the C program that <stdarg.h> exists and should
be included.
i_stddefThis variable conditionally defines the I_STDDEF symbol, which
indicates to the C program that <stddef.h> exists and should
be included.
i_stdlibThis variable conditionally defines the I_STDLIB symbol, which
indicates to the C program that <stdlib.h> exists and should
be included.
i_stringThis variable conditionally defines the I_STRING symbol, which
indicates that <string.h> should be included rather than <strings.h>.
i_sunmathThis variable conditionally defines the I_SUNMATH symbol, and indicates
whether a C program should include <sunmath.h>.
i_sysaccessThis variable conditionally defines the I_SYS_ACCESS symbol,
and indicates whether a C program should include <sys/access.h>.
i_sysdirThis variable conditionally defines the I_SYS_DIR symbol, and indicates
whether a C program should include <sys/dir.h>.
i_sysfileThis variable conditionally defines the I_SYS_FILE symbol, and indicates
whether a C program should include <sys/file.h> to get R_OK and friends.
i_sysfilioThis variable conditionally defines the I_SYS_FILIO symbol, which
indicates to the C program that <sys/filio.h> exists and should
be included in preference to <sys/ioctl.h>.
i_sysinThis 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_sysioctlThis variable conditionally defines the I_SYS_IOCTL symbol, which
indicates to the C program that <sys/ioctl.h> exists and should
be included.
i_syslogThis variable conditionally defines the I_SYSLOG symbol,
and indicates whether a C program should include <syslog.h>.
i_sysmmanThis variable conditionally defines the I_SYS_MMAN symbol, and
indicates whether a C program should include <sys/mman.h>.
i_sysmodeThis variable conditionally defines the I_SYSMODE symbol,
and indicates whether a C program should include <sys/mode.h>.
i_sysmountThis variable conditionally defines the I_SYSMOUNT symbol,
and indicates whether a C program should include <sys/mount.h>.
i_sysndirThis variable conditionally defines the I_SYS_NDIR symbol, and indicates
whether a C program should include <sys/ndir.h>.
i_sysparamThis variable conditionally defines the I_SYS_PARAM symbol, and indicates
whether a C program should include <sys/param.h>.
i_sysresrcThis variable conditionally defines the I_SYS_RESOURCE symbol,
and indicates whether a C program should include <sys/resource.h>.
i_syssecrtThis variable conditionally defines the I_SYS_SECURITY symbol,
and indicates whether a C program should include <sys/security.h>.
i_sysselctThis 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_syssockioThis variable conditionally defines I_SYS_SOCKIO to indicate to the
C program that socket ioctl codes may be found in <sys/sockio.h>
instead of <sys/ioctl.h>.
i_sysstatThis variable conditionally defines the I_SYS_STAT symbol,
and indicates whether a C program should include <sys/stat.h>.
i_sysstatfsThis variable conditionally defines the I_SYSSTATFS symbol,
and indicates whether a C program should include <sys/statfs.h>.
i_sysstatvfsThis variable conditionally defines the I_SYSSTATVFS symbol,
and indicates whether a C program should include <sys/statvfs.h>.
i_systimeThis variable conditionally defines I_SYS_TIME, which indicates
to the C program that it should include <sys/time.h>.
i_systimekThis variable conditionally defines I_SYS_TIME_KERNEL, which
indicates to the C program that it should include <sys/time.h>
with KERNEL defined.
i_systimesThis variable conditionally defines the I_SYS_TIMES symbol, and indicates
whether a C program should include <sys/times.h>.
i_systypesThis variable conditionally defines the I_SYS_TYPES symbol,
and indicates whether a C program should include <sys/types.h>.
i_sysuioThis variable conditionally defines the I_SYSUIO symbol, and indicates
whether a C program should include <sys/uio.h>.
i_sysunThis variable conditionally defines I_SYS_UN, which indicates
to the C program that it should include <sys/un.h> to get UNIX
domain socket definitions.
i_sysutsnameThis variable conditionally defines the I_SYSUTSNAME symbol,
and indicates whether a C program should include <sys/utsname.h>.
i_sysvfsThis variable conditionally defines the I_SYSVFS symbol,
and indicates whether a C program should include <sys/vfs.h>.
i_syswaitThis variable conditionally defines I_SYS_WAIT, which indicates
to the C program that it should include <sys/wait.h>.
i_termioThis variable conditionally defines the I_TERMIO symbol, which
indicates to the C program that it should include <termio.h> rather
than <sgtty.h>.
i_termiosThis variable conditionally defines the I_TERMIOS symbol, which
indicates to the C program that the POSIX <termios.h> file is
to be included.
i_timeThis variable conditionally defines I_TIME, which indicates
to the C program that it should include <time.h>.
i_unistdThis variable conditionally defines the I_UNISTD symbol, and indicates
whether a C program should include <unistd.h>.
i_ustatThis variable conditionally defines the I_USTAT symbol, and indicates
whether a C program should include <ustat.h>.
i_utimeThis variable conditionally defines the I_UTIME symbol, and indicates
whether a C program should include <utime.h>.
i_valuesThis variable conditionally defines the I_VALUES symbol, and indicates
whether a C program may include <values.h> to get symbols like MAXLONG
and friends.
i_varargsThis variable conditionally defines I_VARARGS, which indicates
to the C program that it should include <varargs.h>.
i_varhdrContains the name of the header to be included to get va_dcl definition. Typically one of varargs.h or stdarg.h.
i_vforkThis variable conditionally defines the I_VFORK symbol, and indicates
whether a C program should include vfork.h.
ignore_versioned_solibsThis 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_listThis 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. See INSTALL for how this works. The versioned
site_perl directory was introduced in 5.005, so that is the
lowest possible value.
inc_version_list_initThis 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_LIST initialization.
incpathThis 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.
inewsThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
installarchlibThis 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.
installbinThis variable is the same as binexp unless AFS is running in which case
the user is explicitely prompted for it. This variable should always
be used in your makefiles for maximum portability.
installman1dirThis variable is really the same as man1direxp, unless you are using
AFS in 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.
installman3dirThis variable is really the same as man3direxp, unless you are using
AFS in 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.
installprefixThis 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.
installprefixexpThis variable holds the full absolute path of installprefix with all ~-expansion done.
installprivlibThis 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.
installscriptThis 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.
installsitearchThis 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.
installsitebinThis 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.
installsitelibThis 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.
installstyleThis variable describes the style of 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: lib and 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.
This may later be extended to include other information, so
be careful with pattern-matching on the results.
For compatibility with F<perl5.005> and earlier, the default
setting is based on whether or not $prefix contains the string
C<perl>.
installusrbinperlThis variable tells whether Perl should be installed also as /usr/bin/perl in addition to $installbin/perl
installvendorarchThis 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.
installvendorbinThis 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.
installvendorlibThis 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.
intsizeThis variable contains the value of the INTSIZE symbol, which
indicates to the C program how many bytes there are in an int.
issymlinkThis variable holds the test command to test for a symbolic link
(if they are supported). Typical values include test -h and
test -L.
ivdformatThis variable contains the format string used for printing
a Perl IV as a signed decimal integer.
ivsizeThis variable is the size of an IV in bytes.
ivtypeThis variable contains the C type used for Perl's IV.
known_extensionsThis variable holds a list of all XS extensions included in
the package.
kshThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
ldThis variable indicates the program to be used to link
libraries for dynamic loading. On some systems, it is ld.
On ELF systems, it should be $cc. Mostly, we'll try to respect
the hint file setting.
lddlflagsThis 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.
ldflagsThis variable contains any additional C loader flags desired by the user. It is up to the Makefile to use this.
ldflags_uselargefilesThis variable contains the loader flags needed by large file builds and added to ldflags by hints files.
ldlibpthnameThis 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 to none.
lessThis 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 less and is not useful.
lib_extThis is an old synonym for _a.
libcThis variable contains the location of the C library.
libperlThe 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.
libpthThis variable holds the general path (space-separated) used to find libraries. It is intended to be used by other units.
libsThis variable holds the additional libraries we want to use. It is up to the Makefile to deal with it.
libsdirsThis variable holds the directory names aka dirnames of the libraries we found and accepted, duplicates are removed.
libsfilesThis variable holds the filenames aka basenames of the libraries we found and accepted.
libsfoundThis variable holds the full pathnames of the libraries we found and accepted.
libspathThis variable holds the directory names probed for libraries.
libswantedThis 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_uselargefilesThis 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 lib prefix or any suffix, just
like libswanted..
lineThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
lintThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
lkflagsThis variable contains any additional C partial linker flags desired by the user. It is up to the Makefile to use this.
lnThis 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 ln and is not useful.
lnsThis 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 -s or ln
locincpthThis variable contains a list of additional directories to be
searched by the compiler. The appropriate -I directives 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.
loclibpthThis 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.
longdblsizeThis variable contains the value of the LONG_DOUBLESIZE symbol, which
indicates to the C program how many bytes there are in a long double,
if this system supports long doubles.
longlongsizeThis variable contains the value of the LONGLONGSIZE symbol, which
indicates to the C program how many bytes there are in a long long,
if this system supports long long.
longsizeThis variable contains the value of the LONGSIZE symbol, which
indicates to the C program how many bytes there are in a long.
lpThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
lprThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
lsThis 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 ls and is not useful.
lseeksizeThis 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).
lseektypeThis 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).
mailThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
mailxThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
makeThis 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 make and is not useful.
make_set_makeSome versions of make set the variable MAKE. Others do not.
This variable contains the string to be included in Makefile.SH
so that MAKE is 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.
I used a comment character so that we can distinguish a
set value (from a previous config.sh or Configure -D option)
from an uncomputed value.
mallocobjThis 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.
mallocsrcThis 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.
malloctypeThis variable contains the kind of ptr returned by malloc and realloc.
man1dirThis 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.
man1direxpThis variable is the same as the man1dir variable, but is filename expanded at configuration time, for convenient use in makefiles.
man1extThis variable contains the extension that the manual page should
have: one of n, l, or 1. The Makefile must supply the ..
See man1dir.
man3dirThis 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.
man3direxpThis variable is the same as the man3dir variable, but is filename expanded at configuration time, for convenient use in makefiles.
man3extThis variable contains the extension that the manual page should
have: one of n, l, or 3. The Makefile must supply the ..
See man3dir.
MccThis 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 Mcc and is not useful.
mips_typeThis variable holds the environment type for the mips system. Possible values are ``BSD 4.3'' and ``System V''.
mkdirThis 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 mkdir and is not useful.
mmaptypeThis symbol contains the type of pointer returned by mmap()
(and simultaneously the type of the first argument).
It can be void * or caddr_t.
modetypeThis variable defines modetype to be something like mode_t, int, unsigned short, or whatever type is used to declare file modes for system calls.
moreThis 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 more and is not useful.
multiarchThis variable conditionally defines the MULTIARCH symbol
which signifies the presence of multiplatform files.
This is normally set by hints files.
mvThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
myarchnameThis 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.
mydomainThis variable contains the eventual value of the MYDOMAIN symbol,
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.
myhostnameThis variable contains the eventual value of the MYHOSTNAME symbol,
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.
myunameThe output of uname -a if available, otherwise the hostname. On Xenix,
pseudo variables assignments in the output are stripped, thank you. The
whole thing is then lower-cased.
nThis variable contains the -n flag 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_copyThis 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-
independent macro, Perl_va_copy(src, dst), to do the job.
netdb_hlen_typeThis 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_typeThis 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_typeThis 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_typeThis 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.
nmThis 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 nm and is not useful.
nm_optThis variable holds the options that may be necessary for nm.
nm_so_optThis 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 ELF library which
has been stripped, but nm --dynamic is *fatal* on an archive library.
Maybe Linux should just always set usenm=false.
nonxs_extThis variable holds a list of all non-xs extensions included in the package. All of them will be built.
nroffThis 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 nroff and is not useful.
nveformatThis variable contains the format string used for printing
a Perl NV using %e-ish floating point format.
nvEUformatThis variable contains the format string used for printing
a Perl NV using %E-ish floating point format.
nvfformatThis variable confains the format string used for printing
a Perl NV using %f-ish floating point format.
nvFUformatThis variable confains the format string used for printing
a Perl NV using %F-ish floating point format.
nvgformatThis variable contains the format string used for printing
a Perl NV using %g-ish floating point format.
nvGUformatThis variable contains the format string used for printing
a Perl NV using %G-ish floating point format.
nvsizeThis variable is the size of an NV in bytes.
nvtypeThis variable contains the C type used for Perl's NV.
o_nonblockThis 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_extThis is an old synonym for _o.
old_pthread_create_joinableThis variable defines the constant to use for creating joinable
(aka undetached) pthreads. Unused if pthread.h defines
PTHREAD_CREATE_JOINABLE. If used, possible values are
PTHREAD_CREATE_UNDETACHED and __UNDETACHED.
optimizeThis variable contains any optimizer/debugger flag that should be used. It is up to the Makefile to use it.
orderlibThis variable is true if the components of libraries must be ordered
(with `lorder $* | tsort`) before placing them in an archive. Set to
false if ranlib or ar can generate random libraries.
osnameThis 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.
osversThis 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.
otherlibdirsThis 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 of means none and is used to preserve this value
for the next run through Configure.
packageThis variable contains the name of the package being constructed. It is primarily intended for the use of later Configure units.
pagerThis variable contains the name of the preferred pager on the system. Usual values are (the full pathnames of) more, less, pg, or cat.
passcatThis 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 NIS is used.
On some systems, such as os390, there may be no equivalent
command, in which case this variable is unset.
patchlevelThe 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 as PERL_VERSION.
path_sepThis is an old synonym for p_ in Head.U, the character
used to separate elements in the command shell search PATH.
perl5This 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.
perlThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
PERL_REVISIONIn a Perl version number such as 5.6.2, this is the 5. This value is manually set in patchlevel.h
PERL_SUBVERSIONIn 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_VERSIONIn a Perl version number such as 5.6.2, this is the 6. This value is manually set in patchlevel.h
perladminElectronic mail address of the perl5 administrator.
perllibsThe list of libraries needed by Perl only (any libraries needed by extensions only will by dropped, if using dynamic loading).
perlpathThis variable contains the eventual value of the PERLPATH symbol,
which contains the name of the perl interpreter to be used in
shell scripts and in the ``eval exec'' idiom.
pgThis 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 pg and is not useful.
phostnameThis variable contains the eventual value of the PHOSTNAME symbol,
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.
pidtypeThis variable defines PIDTYPE to be something like pid_t, int,
ushort, or whatever type is used to declare process ids in the kernel.
plibpthHolds 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.
pm_apiversionThis variable contains the version of the oldest perl
compatible with the present perl. (That is, pure perl modules
written for $pm_apiversion will still work for the current
version). perl.c:incpush() and lib/lib.pm will automatically
search in $sitelib for older directories across major versions
back to pm_apiversion. This is only useful if you have a perl
library directory tree structured like the default one. The
versioned site_perl library was introduced in 5.005, so that's
the default setting for this variable. It's hard to imagine
it changing before Perl6. It is included here for symmetry
with xs_apiveprsion -- the searching algorithms will
(presumably) be similar.
See the INSTALL file for how this works.
pmakeThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
prThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
prefixThis 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.
prefixexpThis variable holds the full absolute path of the directory below which the user will install the package. Derived from prefix.
privlibThis variable contains the eventual value of the PRIVLIB symbol,
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).
privlibexpThis variable is the ~name expanded version of privlib, so that you may use it directly in Makefiles or shell scripts.
prototypeThis variable holds the eventual value of CAN_PROTOTYPE, which
indicates the C compiler can handle funciton prototypes.
ptrsizeThis variable contains the value of the PTRSIZE symbol, which
indicates to the C program how many bytes there are in a pointer.
quadkindThis variable, if defined, encodes the type of a quad: 1 = int, 2 = long, 3 = long long, 4 = int64_t.
quadtypeThis variable defines Quad_t to be something like long, int, long long, int64_t, or whatever type is used for 64-bit integers.
randbitsIndicates how many bits are produced by the function used to generate normalized random numbers.
randfuncIndicates the name of the random number function to use.
Values include drand48, random, and rand. In C programs,
the Drand01 macro is defined to generate uniformly distributed
random numbers over the range [0., 1.[ (see drand01 and nrand).
randseedtypeIndicates the type of the argument of the seedfunc.
ranlibThis 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 supported
rd_nodataThis variable holds the return code from read() when no data is
present. It should be -1, but some systems return 0 when O_NDELAY is
used, which is a shame because you cannot make the difference between
no data and an EOF.. Sigh!
revisionThe 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 as PERL_REVISION.
rmThis 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 rm and is not useful.
rmailThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
runnmThis variable contains true or false depending whether the
nm extraction should be performed or not, according to the value
of usenm and the flags on the Configure command line.
sched_yieldThis variable defines the way to yield the execution of the current thread.
scriptdirThis 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.
scriptdirexpThis variable is the same as scriptdir, but is filename expanded at configuration time, for programs not wanting to bother with it.
sedThis 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 sed and is not useful.
seedfuncIndicates the random number generating seed function. Values include srand48, srandom, and srand.
selectminbitsThis 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.
selecttypeThis variable holds the type used for the 2nd, 3rd, and 4th
arguments to select. Usually, this is fd_set *, if HAS_FD_SET
is defined, and int * otherwise. This is only useful if you
have select(), naturally.
sendmailThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
shThis 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 -D
option, though you can override this (and startsh)
with -O -Dsh=/bin/whatever -Dstartsh=whatever
sharThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
sharpbangThis variable contains the string #! if this system supports that construct.
shmattypeThis symbol contains the type of pointer returned by shmat().
It can be void * or char *.
shortsizeThis variable contains the value of the SHORTSIZE symbol which
indicates to the C program how many bytes there are in a short.
shrpenvIf the user builds a shared libperl.so, then we need to tell the
perl executable where it will be able to find the installed libperl.so.
One way to do this on some systems is to set the environment variable
LD_RUN_PATH to 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 $libs
Typical values are
shrpenv=``env LD_RUN_PATH=$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, NetBSD) or -Wl,-rpath
$archlibexp/CORE (Linux).
shsharpThis variable tells further Configure units whether your sh can handle # comments.
sig_countThis variable holds a number larger than the largest valid
signal number. This is usually the same as the NSIG macro.
sig_nameThis variable holds the signal names, space separated. The leading
SIG in signal name is removed. A ZERO is prepended to the
list. This is currently not used.
sig_name_initThis variable holds the signal names, enclosed in double quotes and
separated by commas, suitable for use in the SIG_NAME definition
below. A ZERO is prepended to the list, and the list is
terminated with a plain 0. The leading SIG in signal names
is removed. See sig_num.
sig_numThis variable holds the signal numbers, space separated. A ZERO is
prepended to the list (corresponding to the fake SIGZERO), and
the list is terminated with a 0. Those numbers correspond to
the value of the signal listed in the same place within the
sig_name list.
sig_num_initThis variable holds the signal numbers, enclosed in double quotes and
separated by commas, suitable for use in the SIG_NUM definition
below. A ZERO is prepended to the list, and the list is
terminated with a plain 0.
sig_sizeThis variable contains the number of elements of the sig_name
and sig_num arrays, excluding the final NULL entry.
signal_tThis variable holds the type of the signal handler (void or int).
sitearchThis variable contains the eventual value of the SITEARCH symbol,
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. See INSTALL for details.
sitearchexpThis variable is the ~name expanded version of sitearch, so that you may use it directly in Makefiles or shell scripts.
sitebinThis 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 INSTALL for details.
sitebinexpThis is the same as the sitebin variable, but is filename expanded at configuration time, for use in your makefiles.
sitelibThis variable contains the eventual value of the SITELIB symbol,
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. See INSTALL for details.
sitelib_stemThis 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.
sitelibexpThis variable is the ~name expanded version of sitelib, so that you may use it directly in Makefiles or shell scripts.
siteprefixThis variable holds the full absolute path of the directory below
which the user will install add-on packages.
See INSTALL for usage and examples.
siteprefixexpThis variable holds the full absolute path of the directory below which the user will install add-on packages. Derived from siteprefix.
sizesizeThis variable contains the size of a sizetype in bytes.
sizetypeThis variable defines sizetype to be something like size_t, unsigned long, or whatever type is used to declare length parameters for string functions.
sleepThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
smailThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
soThis variable holds the extension used to identify shared libraries
(also known as shared objects) on the system. Usually set to so.
sockethdrThis variable has any cpp -I flags needed for socket support.
socketlibThis variable has the names of any libraries needed for socket support.
socksizetypeThis variable holds the type used for the size argument for various socket calls like accept. Usual values include socklen_t, size_t, and int.
sortThis 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 sort and is not useful.
spackageThis variable contains the name of the package being constructed, with the first letter uppercased, i.e. suitable for starting sentences.
spitshellThis variable contains the command necessary to spit out a runnable
shell on this system. It is either cat or a grep -v for # comments.
sPRId64This variable, if defined, contains the string used by stdio to
format 64-bit decimal numbers (format d) for output.
sPRIeldblThis variable, if defined, contains the string used by stdio to
format long doubles (format e) for output.
sPRIEUldblThis variable, if defined, contains the string used by stdio to
format long doubles (format E) for output.
The U in the name is to separate this from sPRIeldbl so that even
case-blind systems can see the difference.
sPRIfldblThis variable, if defined, contains the string used by stdio to
format long doubles (format f) for output.
sPRIFUldblThis variable, if defined, contains the string used by stdio to
format long doubles (format F) for output.
The U in the name is to separate this from sPRIfldbl so that even
case-blind systems can see the difference.
sPRIgldblThis variable, if defined, contains the string used by stdio to
format long doubles (format g) for output.
sPRIGUldblThis variable, if defined, contains the string used by stdio to
format long doubles (format G) for output.
The U in the name is to separate this from sPRIgldbl so that even
case-blind systems can see the difference.
sPRIi64This variable, if defined, contains the string used by stdio to
format 64-bit decimal numbers (format i) for output.
sPRIo64This variable, if defined, contains the string used by stdio to
format 64-bit octal numbers (format o) for output.
sPRIu64This variable, if defined, contains the string used by stdio to
format 64-bit unsigned decimal numbers (format u) for output.
sPRIx64This variable, if defined, contains the string used by stdio to
format 64-bit hexadecimal numbers (format x) for output.
sPRIXU64This variable, if defined, contains the string used by stdio to
format 64-bit hExADECimAl numbers (format X) for output.
The U in the name is to separate this from sPRIx64 so that even
case-blind systems can see the difference.
srcThis variable holds the path to the package source. It is up to
the Makefile to use this variable and set VPATH accordingly to
find the sources remotely.
sSCNfldblThis variable, if defined, contains the string used by stdio to
format long doubles (format f) for input.
ssizetypeThis 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).
startperlThis 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.
startshThis 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_extThis variable holds a list of XS extension files we want to
link statically into the package. It is used by Makefile.
stdcharThis variable conditionally defines STDCHAR to be the type of char
used in stdio.h. It has the values ``unsigned char'' or char.
stdio_baseThis variable defines how, given a FILE pointer, fp, to access the
_base field (or equivalent) of stdio.h's FILE structure. This will
be used to define the macro FILE_base(fp).
stdio_bufsizThis variable defines how, given a FILE pointer, fp, to determine
the number of bytes store in the I/O buffer pointer to by the
_base field (or equivalent) of stdio.h's FILE structure. This will
be used to define the macro FILE_bufsiz(fp).
stdio_cntThis variable defines how, given a FILE pointer, fp, to access the
_cnt field (or equivalent) of stdio.h's FILE structure. This will
be used to define the macro FILE_cnt(fp).
stdio_filbufThis variable defines how, given a FILE pointer, fp, to tell
stdio to refill it's internal buffers (?). This will
be used to define the macro FILE_filbuf(fp).
stdio_ptrThis variable defines how, given a FILE pointer, fp, to access the
_ptr field (or equivalent) of stdio.h's FILE structure. This will
be used to define the macro FILE_ptr(fp).
stdio_stream_arrayThis variable tells the name of the array holding the stdio streams. Usual values include _iob, __iob, and __sF.
stringsThis variable holds the full path of the string header that will be used. Typically /usr/include/string.h or /usr/include/strings.h.
submitThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
subversionThe 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 as PERL_SUBVERSION.
This is unique to perl.
sysmanThis 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.
tailThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
tarThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
tblThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
teeThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
testThis 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 test and is not useful.
timeinclThis variable holds the full path of the included time header(s).
timetypeThis variable holds the type returned by time(). It can be long,
or time_t on BSD sites (in which case <sys/types.h> should be
included). Anyway, the type Time_t should be used.
touchThis 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 touch and is not useful.
trThis 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 tr and is not useful.
trnlThis variable contains the value to be passed to the tr(1)
command to transliterate a newline. Typical values are
\012 and \n. This is needed for EBCDIC systems where
newline is not necessarily \012.
troffThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
u16sizeThis variable is the size of an U16 in bytes.
u16typeThis variable contains the C type used for Perl's U16.
u32sizeThis variable is the size of an U32 in bytes.
u32typeThis variable contains the C type used for Perl's U32.
u64sizeThis variable is the size of an U64 in bytes.
u64typeThis variable contains the C type used for Perl's U64.
u8sizeThis variable is the size of an U8 in bytes.
u8typeThis variable contains the C type used for Perl's U8.
uidformatThis variable contains the format string used for printing a Uid_t.
uidsignThis variable contains the signedness of a uidtype. 1 for unsigned, -1 for signed.
uidsizeThis variable contains the size of a uidtype in bytes.
uidtypeThis variable defines Uid_t to be something like uid_t, int, ushort, or whatever type is used to declare user ids in the kernel.
unameThis 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 uname and is not useful.
uniqThis 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 uniq and is not useful.
uquadtypeThis 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.
use5005threadsThis variable conditionally defines the USE_5005THREADS symbol, and indicates that Perl should be built to use the 5.005-based threading implementation.
use64bitallThis 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 CPU at all or
you may need at least to reboot your OS to 64-bit mode.
use64bitintThis 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.
usedlThis variable indicates if the system supports dynamic loading of some sort. See also dlsrc and dlobj.
useithreadsThis variable conditionally defines the USE_ITHREADS symbol,
and indicates that Perl should be built to use the interpreter-based
threading implementation.
uselargefilesThis variable conditionally defines the USE_LARGE_FILES symbol,
and indicates that large file interfaces should be used when
available.
uselongdoubleThis variable conditionally defines the USE_LONG_DOUBLE symbol,
and indicates that long doubles should be used when available.
usemorebitsThis variable conditionally defines the USE_MORE_BITS symbol,
and indicates that explicit 64-bit interfaces and long doubles
should be used when available.
usemultiplicityThis variable conditionally defines the MULTIPLICITY symbol,
and indicates that Perl should be built to use multiplicity.
usemymallocThis 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.
usenmThis variable contains true or false depending whether the
nm extraction is wanted or not.
useopcodeThis variable holds either true or false to 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.
useperlioThis variable conditionally defines the USE_PERLIO symbol,
and indicates that the PerlIO abstraction should be
used throughout.
useposixThis variable holds either true or false to indicate
whether the POSIX extension should be used. The sole
use for this currently is to allow an easy mechanism
for hints files to indicate that POSIX will not compile
on a particular system.
usesfioThis 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''.
useshrplibThis variable is set to yes if the user wishes
to build a shared libperl, and no otherwise.
usesocksThis variable conditionally defines the USE_SOCKS symbol,
and indicates that Perl should be built to use SOCKS.
usethreadsThis variable conditionally defines the USE_THREADS symbol,
and indicates that Perl should be built to use threads.
usevendorprefixThis variable tells whether the vendorprefix and consequently other vendor* paths are in use.
usevforkThis 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.
usrincThis variable holds the path of the include files, which is usually /usr/include. It is mainly used by other Configure units.
uunameThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
uvoformatThis variable contains the format string used for printing
a Perl UV as an unsigned octal integer.
uvsizeThis variable is the size of a UV in bytes.
uvtypeThis variable contains the C type used for Perl's UV.
uvuformatThis variable contains the format string used for printing
a Perl UV as an unsigned decimal integer.
uvxformatThis variable contains the format string used for printing
a Perl UV as an unsigned hexadecimal integer in lowercase abcdef.
uvXUformatThis variable contains the format string used for printing
a Perl UV as an unsigned hexadecimal integer in uppercase ABCDEF.
vendorarchThis variable contains the value of the PERL_VENDORARCH symbol.
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.PL INSTALLDIRS=vendor
or equivalent. See INSTALL for details.
vendorarchexpThis variable is the ~name expanded version of vendorarch, so that you may use it directly in Makefiles or shell scripts.
vendorbinThis variable contains the eventual value of the VENDORBIN symbol.
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.PL INSTALLDIRS=vendor
or equivalent. See INSTALL for details.
vendorbinexpThis variable is the ~name expanded version of vendorbin, so that you may use it directly in Makefiles or shell scripts.
vendorlibThis variable contains the eventual value of the VENDORLIB symbol,
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.PL INSTALLDIRS=vendor
or equivalent. See INSTALL for details.
vendorlib_stemThis 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.
vendorlibexpThis variable is the ~name expanded version of vendorlib, so that you may use it directly in Makefiles or shell scripts.
vendorprefixThis variable holds the full absolute path of the directory below
which the vendor will install add-on packages.
See INSTALL for usage and examples.
vendorprefixexpThis variable holds the full absolute path of the directory below which the vendor will install add-on packages. Derived from vendorprefix.
versionThe 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.
versiononlyIf 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 INSTALL for a more complete list). Nor are the man
pages installed.
Usually, this is undef.
viThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
voidflagsThis variable contains the eventual value of the VOIDFLAGS symbol,
which indicates how much support of the void type is given by this
compiler. See VOIDFLAGS for more info.
xlibpthThis variable holds extra path (space-separated) used to find
libraries on this platform, for example CPU-specific libraries
(on multi-CPU platforms) may be listed here.
xs_apiversionThis variable contains the version of the oldest perl binary
compatible with the present perl. perl.c:incpush() and
lib/lib.pm will automatically search in $sitearch for older
directories across major versions back to xs_apiversion.
This is only useful if you have a perl library directory tree
structured like the default one.
See INSTALL for how this works.
The versioned site_perl directory was introduced in 5.005,
so that is the lowest possible value.
Since this can depend on compile time options (such as
bincompat) it is set by Configure. Other non-default sources
of potential incompatibility, such as multiplicity, threads,
debugging, 64bits, sfio, etc., are not checked for currently,
though in principle we could go snooping around in old
Config.pm files.
zcatThis variable is defined but not used by Configure. The value is a plain '' and is not useful.
zipThis 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 zip and is not useful.
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.
|
Config - access Perl configuration information |