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Config(3)
NAME
Config - access Perl configuration information
SYNOPSIS
use Config;
if ($Config{'cc'} =~ /gcc/) {
print "built by gcc\n";
}
use Config qw(myconfig config_sh config_vars);
print myconfig();
print config_sh();
config_vars(qw(osname archname));
DESCRIPTION
The Config module contains all the information that was available to the
"Configure" program at Perl build time (over 900 values).
Shell variables from the config.sh file (written by Configure) are stored
in the readonly-variable "%Config", indexed by their names.
Values stored in config.sh as 'undef' are returned as undefined values.
The perl "exists" function can be used to check if a named variable exists.
myconfig()
Returns a textual summary of the major perl configuration values. See
also "-V" in the Switches entry in the perlrun manpage.
config_sh()
Returns the entire perl configuration information in the form of the
original config.sh shell variable assignment script.
config_vars(@names)
Prints to STDOUT the values of the named configuration variable. Each
is printed on a separate line in the form:
name='value';
Names which are unknown are output as "name='UNKNOWN';". See also
"-V:name" in the Switches entry in the perlrun manpage.
EXAMPLE
Here's a more sophisticated example of using %Config:
use Config;
use strict;
my %sig_num;
my @sig_name;
unless($Config{sig_name} && $Config{sig_num}) {
die "No sigs?";
} else {
my @names = split ' ', $Config{sig_name};
@sig_num{@names} = split ' ', $Config{sig_num};
foreach (@names) {
$sig_name[$sig_num{$_}] ||= $_;
}
}
print "signal #17 = $sig_name[17]\n";
if ($sig_num{ALRM}) {
print "SIGALRM is $sig_num{ALRM}\n";
}
WARNING
Because this information is not stored within the perl executable itself it
is possible (but unlikely) that the information does not relate to the
actual perl binary which is being used to access it.
The Config module is installed into the architecture and version specific
library directory ($Config{installarchlib}) and it checks the perl version
number when loaded.
The values stored in config.sh may be either single-quoted or double-
quoted. Double-quoted strings are handy for those cases where you need to
include escape sequences in the strings. To avoid runtime variable
interpolation, any "$" and "@" characters are replaced by "\$" and "\@",
respectively. This isn't foolproof, of course, so don't embed "\$" or "\@"
in double-quoted strings unless you're willing to deal with the
consequences. (The slashes will end up escaped and the "$" or "@" will
trigger variable interpolation)
GLOSSARY
Most "Config" variables are determined by the "Configure" script on
platforms supported by it (which is most UNIX platforms). Some platforms
have custom-made "Config" variables, and may thus not have some of the
variables described below, or may have extraneous variables specific to
that particular port. See the port specific documentation in such cases.
_
"_a"
From Unix.U:
This variable defines the extension used for ordinary libraries. For
unix, it is .a. The . is included. Other possible values include
.lib.
"_exe"
From Unix.U:
This variable defines the extension used for executable files. For
unix it is empty. Other possible values include .exe.
"_o"
From Unix.U:
This variable defines the extension used for object files. For unix,
it is .o. The . is included. Other possible values include .obj.
a
"afs"
From afs.U:
This 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.
"alignbytes"
From alignbytes.U:
This variable holds the number of bytes required to align a double-- or
a long double when applicable. Usual values are 2, 4 and 8. The
default is eight, for safety.
"ansi2knr"
From ansi2knr.U:
This variable is set if the user needs to run ansi2knr. Currently, this
is not supported, so we just abort.
"aphostname"
From d_gethname.U:
This variable contains the command which can be used to compute the
host name. The command is fully qualified by its absolute path, to make
it safe when used by a process with super-user privileges.
"api_revision"
From patchlevel.U:
The three variables, api_revision, api_version, and api_subversion,
specify the version of the oldest perl binary compatible with the
present perl. In a full version string such as 5.6.1, api_revision is
the "5". Prior to 5.5.640, the format was a floating point number,
like 5.00563.
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_subversion"
From patchlevel.U:
The three variables, api_revision, api_version, and api_subversion,
specify the version of the oldest perl binary compatible with the
present perl. In a full version string such as 5.6.1, api_subversion
is the "1". See api_revision for full details.
"api_version"
From patchlevel.U:
The three variables, api_revision, api_version, and api_subversion,
specify the version of the oldest perl binary compatible with the
present perl. In a full version string such as 5.6.1, api_version is
the "6". See api_revision for full details. As a special case, 5.5.0
is rendered in the old-style as 5.005. (In the 5.005_0x maintenance
series, this was the only versioned directory in $sitelib.)
"api_versionstring"
From patchlevel.U:
This variable combines api_revision, api_version, and api_subversion in
a format such as 5.6.1 (or 5_6_1) suitable for use as a directory name.
This is filesystem dependent.
"ar"
From Loc.U:
This variable is used internally by Configure to determine the full
pathname (if any) of the ar program. After Configure runs, the value
is reset to a plain "ar" and is not useful.
"archlib"
From archlib.U:
This variable holds the name of the directory in which the user wants
to put architecture-dependent public library files for $package. It is
most often a local directory such as /usr/local/lib. Programs using
this variable must be prepared to deal with filename expansion.
"archlibexp"
From archlib.U:
This variable is the same as the archlib variable, but is filename
expanded at configuration time, for convenient use.
"archname64"
From use64bits.U:
This variable is used for the 64-bitness part of $archname.
"archname"
From archname.U:
This variable is a short name to characterize the current architecture.
It is used mainly to construct the default archlib.
"archobjs"
From Unix.U:
This variable defines any additional objects that must be linked in
with the program on this architecture. On unix, it is usually empty.
It is typically used to include emulations of unix calls or other
facilities. For perl on OS/2, for example, this would include
os2/os2.obj.
"awk"
From Loc.U:
This variable is used internally by Configure to determine the full
pathname (if any) of the awk program. After Configure runs, the value
is reset to a plain "awk" and is not useful.
b
"baserev"
From baserev.U:
The base revision level of this package, from the .package file.
"bash"
From Loc.U:
This variable is defined but not used by Configure. The value is a
plain '' and is not useful.
"bin"
From bin.U:
This variable holds the name of the directory in which the user wants
to put publicly executable images for the package in question. It is
most often a local directory such as /usr/local/bin. Programs using
this variable must be prepared to deal with ~name substitution.
"bincompat5005"
From bincompat5005.U:
This variable contains y if this version of Perl should be binary-
compatible with Perl 5.005.
"binexp"
From bin.U:
This is the same as the bin variable, but is filename expanded at
configuration time, for use in your makefiles.
"bison"
From Loc.U:
This variable is defined but not used by Configure. The value is a
plain '' and is not useful.
"byacc"
From Loc.U:
This variable is used internally by Configure to determine the full
pathname (if any) of the byacc program. After Configure runs, the
value is reset to a plain "byacc" and is not useful.
"byteorder"
From byteorder.U:
This 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 !
c
"c" From n.U:
This variable contains the \c string if that is what causes the echo
command to suppress newline. Otherwise it is null. Correct usage is
$echo $n "prompt for a question: $c".
"castflags"
From d_castneg.U:
This variable contains a flag that precise difficulties the compiler
has casting odd floating values to unsigned long: 0 = ok 1 = couldn't
cast < 0 2 = couldn't cast >= 0x80000000 4 = couldn't cast in argument
expression list
"cat"
From Loc.U:
This variable is used internally by Configure to determine the full
pathname (if any) of the cat program. After Configure runs, the value
is reset to a plain "cat" and is not useful.
"cc"
From cc.U:
This variable holds the name of a command to execute a C compiler which
can resolve multiple global references that happen to have the same
name. Usual values are "cc" and "gcc". Fervent "ANSI" compilers may
be called "c89". "AIX" has xlc.
"cccdlflags"
From dlsrc.U:
This 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.
"ccdlflags"
From dlsrc.U:
This variable contains any special flags that might need to be passed
to cc to link with a shared library for dynamic loading. It is up to
the makefile to use it. For sunos 4.1, it should be empty.
"ccflags"
From ccflags.U:
This variable contains any additional C compiler flags desired by the
user. It is up to the Makefile to use this.
"ccflags_uselargefiles"
From uselfs.U:
This variable contains the compiler flags needed by large file builds
and added to ccflags by hints files.
"ccname"
From Checkcc.U:
This can set either by hints files or by Configure. If using gcc, this
is gcc, and if not, usually equal to cc, unimpressive, no? Some
platforms, however, make good use of this by storing the flavor of the
C compiler being used here. For example if using the Sun WorkShop
suite, ccname will be "workshop".
"ccsymbols"
From Cppsym.U:
The variable contains the symbols defined by the C compiler alone. The
symbols defined by cpp or by cc when it calls cpp are not in this list,
see cppsymbols and cppccsymbols. The list is a space-separated list of
symbol=value tokens.
"ccversion"
From Checkcc.U:
This can set either by hints files or by Configure. If using a (non-
gcc) vendor cc, this variable may contain a version for the compiler.
"cf_by"
From cf_who.U:
Login name of the person who ran the Configure script and answered the
questions. This is used to tag both config.sh and config_h.SH.
"cf_email"
From cf_email.U:
Electronic mail address of the person who ran Configure. This can be
used by units that require the user's e-mail, like MailList.U.
"cf_time"
From cf_who.U:
Holds the output of the "date" command when the configuration file was
produced. This is used to tag both config.sh and config_h.SH.
"charsize"
From charsize.U:
This variable contains the value of the "CHARSIZE" symbol, which
indicates to the C program how many bytes there are in a character.
"chgrp"
From Loc.U:
This variable is defined but not used by Configure. The value is a
plain '' and is not useful.
"chmod"
From Loc.U:
This variable is defined but not used by Configure. The value is a
plain '' and is not useful.
"chown"
From Loc.U:
This variable is defined but not used by Configure. The value is a
plain '' and is not useful.
"clocktype"
From d_times.U:
This 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).
"comm"
From Loc.U:
This variable is used internally by Configure to determine the full
pathname (if any) of the comm program. After Configure runs, the value
is reset to a plain "comm" and is not useful.
"compress"
From Loc.U:
This variable is defined but not used by Configure. The value is a
plain '' and is not useful.
C
"CONFIGDOTSH"
From Oldsyms.U:
This is set to "true" in config.sh so that a shell script sourcing
config.sh can tell if it has been sourced already.
"contains"
From contains.U:
This variable holds the command to do a grep with a proper return
status. On most sane systems it is simply "grep". On insane systems
it is a grep followed by a cat followed by a test. This variable is
primarily for the use of other Configure units.
"cp"
From Loc.U:
This variable is used internally by Configure to determine the full
pathname (if any) of the cp program. After Configure runs, the value
is reset to a plain "cp" and is not useful.
"cpio"
From Loc.U:
This variable is defined but not used by Configure. The value is a
plain '' and is not useful.
"cpp"
From Loc.U:
This variable is used internally by Configure to determine the full
pathname (if any) of the cpp program. After Configure runs, the value
is reset to a plain "cpp" and is not useful.
"cpp_stuff"
From cpp_stuff.U:
This variable contains an identification of the catenation mechanism
used by the C preprocessor.
"cppccsymbols"
From Cppsym.U:
The variable contains the symbols defined by the C compiler when it
calls cpp. The symbols defined by the cc alone or cpp alone are not in
this list, see ccsymbols and cppsymbols. The list is a space-separated
list of symbol=value tokens.
"cppflags"
From ccflags.U:
This variable holds the flags that will be passed to the C pre-
processor. It is up to the Makefile to use it.
"cpplast"
From cppstdin.U:
This variable has the same functionality as cppminus, only it applies
to cpprun and not cppstdin.
"cppminus"
From cppstdin.U:
This variable contains the second part of the string which will invoke
the C preprocessor on the standard input and produce to standard
output. This variable will have the value "-" if cppstdin needs a
minus to specify standard input, otherwise the value is "".
"cpprun"
From cppstdin.U:
This variable contains the command which will invoke a C preprocessor
on standard input and put the output to stdout. It is guaranteed not to
be a wrapper and may be a null string if no preprocessor can be made
directly available. This preprocessor might be different from the one
used by the C compiler. Don't forget to append cpplast after the
preprocessor options.
"cppstdin"
From cppstdin.U:
This variable contains the command which will invoke the C preprocessor
on standard input and put the output to stdout. It is primarily used
by other Configure units that ask about preprocessor symbols.
"cppsymbols"
From Cppsym.U:
The variable contains the symbols defined by the C preprocessor alone.
The symbols defined by cc or by cc when it calls cpp are not in this
list, see ccsymbols and cppccsymbols. The list is a space-separated
list of symbol=value tokens.
"crosscompile"
From crosscompile.U:
This 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.
"cryptlib"
From d_crypt.U:
This variable holds -lcrypt or the path to a libcrypt.a archive if the
crypt() function is not defined in the standard C library. It is up to
the Makefile to use this.
"csh"
From Loc.U:
This variable is used internally by Configure to determine the full
pathname (if any) of the csh program. After Configure runs, the value
is reset to a plain "csh" and is not useful.
d
"d__fwalk"
From d__fwalk.U:
This variable conditionally defines "HAS__FWALK" if _fwalk() is
available to apply a function to all the file handles.
"d_access"
From d_access.U:
This variable conditionally defines "HAS_ACCESS" if the access() system
call is available to check for access permissions using real IDs.
"d_accessx"
From d_accessx.U:
This variable conditionally defines the "HAS_ACCESSX" symbol, which
indicates to the C program that the accessx() routine is available.
"d_alarm"
From d_alarm.U:
This variable conditionally defines the "HAS_ALARM" symbol, which
indicates to the C program that the alarm() routine is available.
"d_archlib"
From archlib.U:
This 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_atolf"
From atolf.U:
This variable conditionally defines the "HAS_ATOLF" symbol, which
indicates to the C program that the atolf() routine is available.
"d_atoll"
From atoll.U:
This variable conditionally defines the "HAS_ATOLL" symbol, which
indicates to the C program that the atoll() routine is available.
"d_attribut"
From d_attribut.U:
This variable conditionally defines "HASATTRIBUTE", which indicates the
C compiler can check for function attributes, such as printf formats.
"d_bcmp"
From d_bcmp.U:
This variable conditionally defines the "HAS_BCMP" symbol if the bcmp()
routine is available to compare strings.
"d_bcopy"
From d_bcopy.U:
This variable conditionally defines the "HAS_BCOPY" symbol if the
bcopy() routine is available to copy strings.
"d_bincompat5005"
From bincompat5005.U:
This 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_bsd"
From Guess.U:
This symbol conditionally defines the symbol "BSD" when running on a
"BSD" system.
"d_bsdgetpgrp"
From d_getpgrp.U:
This variable conditionally defines "USE_BSD_GETPGRP" if getpgrp needs
one arguments whereas "USG" one needs none.
"d_bsdsetpgrp"
From d_setpgrp.U:
This 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_bzero"
From d_bzero.U:
This variable conditionally defines the "HAS_BZERO" symbol if the
bzero() routine is available to set memory to 0.
"d_casti32"
From d_casti32.U:
This variable conditionally defines CASTI32, which indicates whether
the C compiler can cast large floats to 32-bit ints.
"d_castneg"
From d_castneg.U:
This variable conditionally defines "CASTNEG", which indicates wether
the C compiler can cast negative float to unsigned.
"d_charvspr"
From d_vprintf.U:
This variable conditionally defines "CHARVSPRINTF" if this system has
vsprintf returning type (char*). The trend seems to be to declare it
as "int vsprintf()".
"d_chown"
From d_chown.U:
This variable conditionally defines the "HAS_CHOWN" symbol, which
indicates to the C program that the chown() routine is available.
"d_chroot"
From d_chroot.U:
This variable conditionally defines the "HAS_CHROOT" symbol, which
indicates to the C program that the chroot() routine is available.
"d_chsize"
From d_chsize.U:
This 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_closedir"
From d_closedir.U:
This variable conditionally defines "HAS_CLOSEDIR" if closedir() is
available.
"d_const"
From d_const.U:
This variable conditionally defines the "HASCONST" symbol, which
indicates to the C program that this C compiler knows about the const
type.
"d_crypt"
From d_crypt.U:
This 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_csh"
From d_csh.U:
This variable conditionally defines the "CSH" symbol, which indicates
to the C program that the C-shell exists.
"d_cuserid"
From d_cuserid.U:
This 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_dig"
From d_dbl_dig.U:
This variable conditionally defines d_dbl_dig if this system's header
files provide "DBL_DIG", which is the number of significant digits in a
double precision number.
"d_difftime"
From d_difftime.U:
This variable conditionally defines the "HAS_DIFFTIME" symbol, which
indicates to the C program that the difftime() routine is available.
"d_dirnamlen"
From i_dirent.U:
This variable conditionally defines "DIRNAMLEN", which indicates to the
C program that the length of directory entry names is provided by a
d_namelen field.
"d_dlerror"
From d_dlerror.U:
This variable conditionally defines the "HAS_DLERROR" symbol, which
indicates to the C program that the dlerror() routine is available.
"d_dlopen"
From d_dlopen.U:
This variable conditionally defines the "HAS_DLOPEN" symbol, which
indicates to the C program that the dlopen() routine is available.
"d_dlsymun"
From d_dlsymun.U:
This variable conditionally defines "DLSYM_NEEDS_UNDERSCORE", which
indicates that we need to prepend an underscore to the symbol name
before calling dlsym().
"d_dosuid"
From d_dosuid.U:
This variable conditionally defines the symbol "DOSUID", which tells
the C program that it should insert setuid emulation code on hosts
which have setuid #! scripts disabled.
"d_drand48proto"
From d_drand48proto.U:
This variable conditionally defines the HAS_DRAND48_PROTO symbol, which
indicates to the C program that the system provides a prototype for the
drand48() function. Otherwise, it is up to the program to supply one.
"d_dup2"
From d_dup2.U:
This variable conditionally defines HAS_DUP2 if dup2() is available to
duplicate file descriptors.
"d_eaccess"
From d_eaccess.U:
This variable conditionally defines the "HAS_EACCESS" symbol, which
indicates to the C program that the eaccess() routine is available.
"d_endgrent"
From d_endgrent.U:
This 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_endhent"
From d_endhent.U:
This variable conditionally defines "HAS_ENDHOSTENT" if endhostent() is
available to close whatever was being used for host queries.
"d_endnent"
From d_endnent.U:
This variable conditionally defines "HAS_ENDNETENT" if endnetent() is
available to close whatever was being used for network queries.
"d_endpent"
From d_endpent.U:
This variable conditionally defines "HAS_ENDPROTOENT" if endprotoent()
is available to close whatever was being used for protocol queries.
"d_endpwent"
From d_endpwent.U:
This 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_endsent"
From d_endsent.U:
This variable conditionally defines "HAS_ENDSERVENT" if endservent() is
available to close whatever was being used for service queries.
"d_eofnblk"
From nblock_io.U:
This variable conditionally defines "EOF_NONBLOCK" if "EOF" can be seen
when reading from a non-blocking I/O source.
"d_eunice"
From Guess.U:
This variable conditionally defines the symbols "EUNICE" and "VAX",
which alerts the C program that it must deal with ideosyncracies of
"VMS".
"d_fchmod"
From d_fchmod.U:
This 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_fchown"
From d_fchown.U:
This 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_fcntl"
From d_fcntl.U:
This variable conditionally defines the "HAS_FCNTL" symbol, and
indicates whether the fcntl() function exists
"d_fcntl_can_lock"
From d_fcntl_can_lock.U:
This variable conditionally defines the "FCNTL_CAN_LOCK" symbol and
indicates whether file locking with fcntl() works.
"d_fd_macros"
From d_fd_set.U:
This 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_set"
From d_fd_set.U:
This 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_bits"
From d_fd_set.U:
This 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_fgetpos"
From d_fgetpos.U:
This variable conditionally defines "HAS_FGETPOS" if fgetpos() is
available to get the file position indicator.
"d_flexfnam"
From d_flexfnam.U:
This variable conditionally defines the "FLEXFILENAMES" symbol, which
indicates that the system supports filenames longer than 14 characters.
"d_flock"
From d_flock.U:
This variable conditionally defines "HAS_FLOCK" if flock() is available
to do file locking.
"d_fork"
From d_fork.U:
This variable conditionally defines the "HAS_FORK" symbol, which
indicates to the C program that the fork() routine is available.
"d_fpathconf"
From d_pathconf.U:
This 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_t"
From d_fpos64_t.U:
This symbol will be defined if the C compiler supports fpos64_t.
"d_frexpl"
From d_frexpl.U:
This variable conditionally defines the "HAS_FREXPL" symbol, which
indicates to the C program that the frexpl() routine is available.
"d_fs_data_s"
From d_fs_data_s.U:
This variable conditionally defines the "HAS_STRUCT_FS_DATA" symbol,
which indicates that the struct fs_data is supported.
"d_fseeko"
From d_fseeko.U:
This variable conditionally defines the "HAS_FSEEKO" symbol, which
indicates to the C program that the fseeko() routine is available.
"d_fsetpos"
From d_fsetpos.U:
This variable conditionally defines "HAS_FSETPOS" if fsetpos() is
available to set the file position indicator.
"d_fstatfs"
From d_fstatfs.U:
This variable conditionally defines the "HAS_FSTATFS" symbol, which
indicates to the C program that the fstatfs() routine is available.
"d_fstatvfs"
From d_statvfs.U:
This variable conditionally defines the "HAS_FSTATVFS" symbol, which
indicates to the C program that the fstatvfs() routine is available.
"d_fsync"
From d_fsync.U:
This variable conditionally defines the "HAS_FSYNC" symbol, which
indicates to the C program that the fsync() routine is available.
"d_ftello"
From d_ftello.U:
This variable conditionally defines the "HAS_FTELLO" symbol, which
indicates to the C program that the ftello() routine is available.
"d_ftime"
From d_ftime.U:
This 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_Gconvert"
From d_gconvert.U:
This 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_getcwd"
From d_getcwd.U:
This 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_getespwnam"
From d_getespwnam.U:
This variable conditionally defines "HAS_GETESPWNAM" if getespwnam() is
available to retrieve enchanced (shadow) password entries by name.
"d_getfsstat"
From d_getfsstat.U:
This variable conditionally defines the "HAS_GETFSSTAT" symbol, which
indicates to the C program that the getfsstat() routine is available.
"d_getgrent"
From d_getgrent.U:
This 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_getgrps"
From d_getgrps.U:
This 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_gethbyaddr"
From d_gethbyad.U:
This 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_gethbyname"
From d_gethbynm.U:
This 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_gethent"
From d_gethent.U:
This variable conditionally defines "HAS_GETHOSTENT" if gethostent() is
available to look up host names in some data base or another.
"d_gethname"
From d_gethname.U:
This 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_gethostprotos"
From d_gethostprotos.U:
This 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_getlogin"
From d_getlogin.U:
This 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_getmnt"
From d_getmnt.U:
This 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_getmntent"
From d_getmntent.U:
This 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_getnbyaddr"
From d_getnbyad.U:
This 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_getnbyname"
From d_getnbynm.U:
This 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_getnent"
From d_getnent.U:
This variable conditionally defines "HAS_GETNETENT" if getnetent() is
available to look up network names in some data base or another.
"d_getnetprotos"
From d_getnetprotos.U:
This 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_getpagsz"
From d_getpagsz.U:
This variable conditionally defines "HAS_GETPAGESIZE" if getpagesize()
is available to get the system page size.
"d_getpbyname"
From d_getprotby.U:
This 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_getpbynumber"
From d_getprotby.U:
This 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_getpent"
From d_getpent.U:
This variable conditionally defines "HAS_GETPROTOENT" if getprotoent()
is available to look up protocols in some data base or another.
"d_getpgid"
From d_getpgid.U:
This 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_getpgrp2"
From d_getpgrp2.U:
This variable conditionally defines the HAS_GETPGRP2 symbol, which
indicates to the C program that the getpgrp2() (as in DG/"UX") routine
is available to get the current process group.
"d_getpgrp"
From d_getpgrp.U:
This variable conditionally defines "HAS_GETPGRP" if getpgrp() is
available to get the current process group.
"d_getppid"
From d_getppid.U:
This 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_getprior"
From d_getprior.U:
This variable conditionally defines "HAS_GETPRIORITY" if getpriority()
is available to get a process's priority.
"d_getprotoprotos"
From d_getprotoprotos.U:
This 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_getprpwnam"
From d_getprpwnam.U:
This variable conditionally defines "HAS_GETPRPWNAM" if getprpwnam() is
available to retrieve protected (shadow) password entries by name.
"d_getpwent"
From d_getpwent.U:
This 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_getsbyname"
From d_getsrvby.U:
This 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_getsbyport"
From d_getsrvby.U:
This 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_getsent"
From d_getsent.U:
This variable conditionally defines "HAS_GETSERVENT" if getservent() is
available to look up network services in some data base or another.
"d_getservprotos"
From d_getservprotos.U:
This 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_getspnam"
From d_getspnam.U:
This variable conditionally defines "HAS_GETSPNAM" if getspnam() is
available to retrieve SysV shadow password entries by name.
"d_gettimeod"
From d_ftime.U:
This 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_gnulibc"
From d_gnulibc.U:
Defined if we're dealing with the "GNU" C Library.
"d_grpasswd"
From i_grp.U:
This variable conditionally defines "GRPASSWD", which indicates that
struct group in <grp.h> contains gr_passwd.
"d_hasmntopt"
From d_hasmntopt.U:
This 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_htonl"
From d_htonl.U:
This variable conditionally defines "HAS_HTONL" if htonl() and its
friends are available to do network order byte swapping.
"d_iconv"
From d_iconv.U:
This variable conditionally defines the "HAS_ICONV" symbol, which
indicates to the C program that the iconv() routine is available.
"d_index"
From d_strchr.U:
This variable conditionally defines "HAS_INDEX" if index() and rindex()
are available for string searching.
"d_inetaton"
From d_inetaton.U:
This 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_t"
From d_int64_t.U:
This symbol will be defined if the C compiler supports int64_t.
"d_isascii"
From d_isascii.U:
This variable conditionally defines the "HAS_ISASCII" constant, which
indicates to the C program that isascii() is available.
"d_isnan"
From d_isnan.U:
This variable conditionally defines the "HAS_ISNAN" symbol, which
indicates to the C program that the isnan() routine is available.
"d_isnanl"
From d_isnanl.U:
This variable conditionally defines the "HAS_ISNANL" symbol, which
indicates to the C program that the isnanl() routine is available.
"d_killpg"
From d_killpg.U:
This variable conditionally defines the "HAS_KILLPG" symbol, which
indicates to the C program that the killpg() routine is available to
kill process groups.
"d_lchown"
From d_lchown.U:
This 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_dig"
From d_ldbl_dig.U:
This variable conditionally defines d_ldbl_dig if this system's header
files provide "LDBL_DIG", which is the number of significant digits in
a long double precision number.
"d_link"
From d_link.U:
This variable conditionally defines "HAS_LINK" if link() is available
to create hard links.
"d_locconv"
From d_locconv.U:
This variable conditionally defines "HAS_LOCALECONV" if localeconv() is
available for numeric and monetary formatting conventions.
"d_lockf"
From d_lockf.U:
This variable conditionally defines "HAS_LOCKF" if lockf() is available
to do file locking.
"d_longdbl"
From d_longdbl.U:
This variable conditionally defines "HAS_LONG_DOUBLE" if the long
double type is supported.
"d_longlong"
From d_longlong.U:
This variable conditionally defines "HAS_LONG_LONG" if the long long
type is supported.
"d_lseekproto"
From d_lseekproto.U:
This 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_lstat"
From d_lstat.U:
This variable conditionally defines "HAS_LSTAT" if lstat() is available
to do file stats on symbolic links.
"d_madvise"
From d_madvise.U:
This variable conditionally defines "HAS_MADVISE" if madvise() is
available to map a file into memory.
"d_mblen"
From d_mblen.U:
This 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_mbstowcs"
From d_mbstowcs.U:
This 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_mbtowc"
From d_mbtowc.U:
This 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_memchr"
From d_memchr.U:
This 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_memcmp"
From d_memcmp.U:
This 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_memcpy"
From d_memcpy.U:
This 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_memmove"
From d_memmove.U:
This 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_memset"
From d_memset.U:
This 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_mkdir"
From d_mkdir.U:
This variable conditionally defines the "HAS_MKDIR" symbol, which
indicates to the C program that the mkdir() routine is available to
create directories..
"d_mkdtemp"
From d_mkdtemp.U:
This 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_mkfifo"
From d_mkfifo.U:
This variable conditionally defines the "HAS_MKFIFO" symbol, which
indicates to the C program that the mkfifo() routine is available.
"d_mkstemp"
From d_mkstemp.U:
This 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_mkstemps"
From d_mkstemps.U:
This 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_mktime"
From d_mktime.U:
This variable conditionally defines the "HAS_MKTIME" symbol, which
indicates to the C program that the mktime() routine is available.
"d_mmap"
From d_mmap.U:
This variable conditionally defines "HAS_MMAP" if mmap() is available
to map a file into memory.
"d_modfl"
From d_modfl.U:
This variable conditionally defines the "HAS_MODFL" symbol, which
indicates to the C program that the modfl() routine is available.
"d_mprotect"
From d_mprotect.U:
This variable conditionally defines "HAS_MPROTECT" if mprotect() is
available to modify the access protection of a memory mapped file.
"d_msg"
From d_msg.U:
This variable conditionally defines the "HAS_MSG" symbol, which
indicates that the entire msg*(2) library is present.
"d_msg_ctrunc"
From d_socket.U:
This 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_dontroute"
From d_socket.U:
This 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_oob"
From d_socket.U:
This 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_peek"
From d_socket.U:
This 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_proxy"
From d_socket.U:
This 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_msgctl"
From d_msgctl.U:
This variable conditionally defines the "HAS_MSGCTL" symbol, which
indicates to the C program that the msgctl() routine is available.
"d_msgget"
From d_msgget.U:
This variable conditionally defines the "HAS_MSGGET" symbol, which
indicates to the C program that the msgget() routine is available.
"d_msgrcv"
From d_msgrcv.U:
This variable conditionally defines the "HAS_MSGRCV" symbol, which
indicates to the C program that the msgrcv() routine is available.
"d_msgsnd"
From d_msgsnd.U:
This variable conditionally defines the "HAS_MSGSND" symbol, which
indicates to the C program that the msgsnd() routine is available.
"d_msync"
From d_msync.U:
This variable conditionally defines "HAS_MSYNC" if msync() is available
to synchronize a mapped file.
"d_munmap"
From d_munmap.U:
This variable conditionally defines "HAS_MUNMAP" if munmap() is
available to unmap a region mapped by mmap().
"d_mymalloc"
From mallocsrc.U:
This 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_nice"
From d_nice.U:
This variable conditionally defines the "HAS_NICE" symbol, which
indicates to the C program that the nice() routine is available.
"d_nv_preserves_uv"
From perlxv.U:
This variable indicates whether a variable of type nvtype can preserve
all the bits a variable of type uvtype.
"d_nv_preserves_uv_bits"
From perlxv.U:
This variable indicates how many of bits type uvtype a variable nvtype
can preserve.
"d_off64_t"
From d_off64_t.U:
This symbol will be defined if the C compiler supports off64_t.
"d_old_pthread_create_joinable"
From d_pthrattrj.U:
This variable conditionally defines pthread_create_joinable. undef if
pthread.h defines "PTHREAD_CREATE_JOINABLE".
"d_oldpthreads"
From usethreads.U:
This 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_oldsock"
From d_socket.U:
This variable conditionally defines the "OLDSOCKET" symbol, which
indicates that the "BSD" socket interface is based on 4.1c and not 4.2.
"d_open3"
From d_open3.U:
This variable conditionally defines the HAS_OPEN3 manifest constant,
which indicates to the C program that the 3 argument version of the
open(2) function is available.
"d_pathconf"
From d_pathconf.U:
This 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_pause"
From d_pause.U:
This 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_otherlibdirs"
From otherlibdirs.U:
This variable conditionally defines "PERL_OTHERLIBDIRS", which contains
a colon-separated set of paths for the perl binary to include in
@"INC". See also otherlibdirs.
"d_phostname"
From d_gethname.U:
This 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_pipe"
From d_pipe.U:
This 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_poll"
From d_poll.U:
This 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_portable"
From d_portable.U:
This 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_PRId64"
From quadfio.U:
This variable conditionally defines the PERL_PRId64 symbol, which
indiciates that stdio has a symbol to print 64-bit decimal numbers.
"d_PRIeldbl"
From longdblfio.U:
This variable conditionally defines the PERL_PRIfldbl symbol, which
indiciates that stdio has a symbol to print long doubles.
"d_PRIEUldbl"
From longdblfio.U:
This 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_PRIfldbl"
From longdblfio.U:
This variable conditionally defines the PERL_PRIfldbl symbol, which
indiciates that stdio has a symbol to print long doubles.
"d_PRIFUldbl"
From longdblfio.U:
This 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_PRIgldbl"
From longdblfio.U:
This variable conditionally defines the PERL_PRIfldbl symbol, which
indiciates that stdio has a symbol to print long doubles.
"d_PRIGUldbl"
From longdblfio.U:
This 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_PRIi64"
From quadfio.U:
This variable conditionally defines the PERL_PRIi64 symbol, which
indiciates that stdio has a symbol to print 64-bit decimal numbers.
"d_PRIo64"
From quadfio.U:
This variable conditionally defines the PERL_PRIo64 symbol, which
indiciates that stdio has a symbol to print 64-bit octal numbers.
"d_PRIu64"
From quadfio.U:
This variable conditionally defines the PERL_PRIu64 symbol, which
indiciates that stdio has a symbol to print 64-bit unsigned decimal
numbers.
"d_PRIx64"
From quadfio.U:
This variable conditionally defines the PERL_PRIx64 symbol, which
indiciates that stdio has a symbol to print 64-bit hexadecimal numbers.
"d_PRIXU64"
From quadfio.U:
This 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_yield"
From d_pthread_y.U:
This variable conditionally defines the "HAS_PTHREAD_YIELD" symbol if
the pthread_yield routine is available to yield the execution of the
current thread.
"d_pwage"
From i_pwd.U:
This variable conditionally defines "PWAGE", which indicates that
struct passwd contains pw_age.
"d_pwchange"
From i_pwd.U:
This variable conditionally defines "PWCHANGE", which indicates that
struct passwd contains pw_change.
"d_pwclass"
From i_pwd.U:
This variable conditionally defines "PWCLASS", which indicates that
struct passwd contains pw_class.
"d_pwcomment"
From i_pwd.U:
This variable conditionally defines "PWCOMMENT", which indicates that
struct passwd contains pw_comment.
"d_pwexpire"
From i_pwd.U:
This variable conditionally defines "PWEXPIRE", which indicates that
struct passwd contains pw_expire.
"d_pwgecos"
From i_pwd.U:
This variable conditionally defines "PWGECOS", which indicates that
struct passwd contains pw_gecos.
"d_pwpasswd"
From i_pwd.U:
This variable conditionally defines "PWPASSWD", which indicates that
struct passwd contains pw_passwd.
"d_pwquota"
From i_pwd.U:
This variable conditionally defines "PWQUOTA", which indicates that
struct passwd contains pw_quota.
"d_qgcvt"
From d_qgcvt.U:
This variable conditionally defines the "HAS_QGCVT" symbol, which
indicates to the C program that the qgcvt() routine is available.
"d_quad"
From quadtype.U:
This variable, if defined, tells that there's a 64-bit integer type,
quadtype.
"d_readdir"
From d_readdir.U:
This variable conditionally defines "HAS_READDIR" if readdir() is
available to read directory entries.
"d_readlink"
From d_readlink.U:
This 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_rename"
From d_rename.U:
This variable conditionally defines the "HAS_RENAME" symbol, which
indicates to the C program that the rename() routine is available to
rename files.
"d_rewinddir"
From d_readdir.U:
This variable conditionally defines "HAS_REWINDDIR" if rewinddir() is
available.
"d_rmdir"
From d_rmdir.U:
This variable conditionally defines "HAS_RMDIR" if rmdir() is available
to remove directories.
"d_safebcpy"
From d_safebcpy.U:
This variable conditionally defines the "HAS_SAFE_BCOPY" symbol if the
bcopy() routine can do overlapping copies.
"d_safemcpy"
From d_safemcpy.U:
This variable conditionally defines the "HAS_SAFE_MEMCPY" symbol if the
memcpy() routine can do overlapping copies.
"d_sanemcmp"
From d_sanemcmp.U:
This 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_sbrkproto"
From d_sbrkproto.U:
This 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_yield"
From d_pthread_y.U:
This 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_rights"
From d_socket.U:
This 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_SCNfldbl"
From longdblfio.U:
This variable conditionally defines the PERL_PRIfldbl symbol, which
indiciates that stdio has a symbol to scan long doubles.
"d_seekdir"
From d_readdir.U:
This variable conditionally defines "HAS_SEEKDIR" if seekdir() is
available.
"d_select"
From d_select.U:
This 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_sem"
From d_sem.U:
This variable conditionally defines the "HAS_SEM" symbol, which
indicates that the entire sem*(2) library is present.
"d_semctl"
From d_semctl.U:
This variable conditionally defines the "HAS_SEMCTL" symbol, which
indicates to the C program that the semctl() routine is available.
"d_semctl_semid_ds"
From d_union_semun.U:
This variable conditionally defines "USE_SEMCTL_SEMID_DS", which
indicates that struct semid_ds * is to be used for semctl "IPC_STAT".
"d_semctl_semun"
From d_union_semun.U:
This variable conditionally defines "USE_SEMCTL_SEMUN", which indicates
that union semun is to be used for semctl "IPC_STAT".
"d_semget"
From d_semget.U:
This variable conditionally defines the "HAS_SEMGET" symbol, which
indicates to the C program that the semget() routine is available.
"d_semop"
From d_semop.U:
This variable conditionally defines the "HAS_SEMOP" symbol, which
indicates to the C program that the semop() routine is available.
"d_setegid"
From d_setegid.U:
This 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_seteuid"
From d_seteuid.U:
This 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_setgrent"
From d_setgrent.U:
This 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_setgrps"
From d_setgrps.U:
This 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_sethent"
From d_sethent.U:
This variable conditionally defines "HAS_SETHOSTENT" if sethostent() is
available.
"d_setlinebuf"
From d_setlnbuf.U:
This 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_setlocale"
From d_setlocale.U:
This variable conditionally defines "HAS_SETLOCALE" if setlocale() is
available to handle locale-specific ctype implementations.
"d_setnent"
From d_setnent.U:
This variable conditionally defines "HAS_SETNETENT" if setnetent() is
available.
"d_setpent"
From d_setpent.U:
This variable conditionally defines "HAS_SETPROTOENT" if setprotoent()
is available.
"d_setpgid"
From d_setpgid.U:
This variable conditionally defines the "HAS_SETPGID" symbol if the
setpgid(pid, gpid) function is available to set process group "ID".
"d_setpgrp2"
From d_setpgrp2.U:
This variable conditionally defines the HAS_SETPGRP2 symbol, which
indicates to the C program that the setpgrp2() (as in DG/"UX") routine
is available to set the current process group.
"d_setpgrp"
From d_setpgrp.U:
This variable conditionally defines "HAS_SETPGRP" if setpgrp() is
available to set the current process group.
"d_setprior"
From d_setprior.U:
This variable conditionally defines "HAS_SETPRIORITY" if setpriority()
is available to set a process's priority.
"d_setproctitle"
From d_setproctitle.U:
This variable conditionally defines the "HAS_SETPROCTITLE" symbol,
which indicates to the C program that the setproctitle() routine is
available.
"d_setpwent"
From d_setpwent.U:
This 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_setregid"
From d_setregid.U:
This variable conditionally defines "HAS_SETREGID" if setregid() is
available to change the real and effective gid of the current process.
"d_setresgid"
From d_setregid.U:
This variable conditionally defines "HAS_SETRESGID" if setresgid() is
available to change the real, effective and saved gid of the current
process.
"d_setresuid"
From d_setreuid.U:
This variable conditionally defines "HAS_SETREUID" if setresuid() is
available to change the real, effective and saved uid of the current
process.
"d_setreuid"
From d_setreuid.U:
This variable conditionally defines "HAS_SETREUID" if setreuid() is
available to change the real and effective uid of the current process.
"d_setrgid"
From d_setrgid.U:
This 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_setruid"
From d_setruid.U:
This 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_setsent"
From d_setsent.U:
This variable conditionally defines "HAS_SETSERVENT" if setservent() is
available.
"d_setsid"
From d_setsid.U:
This variable conditionally defines "HAS_SETSID" if setsid() is
available to set the process group "ID".
"d_setvbuf"
From d_setvbuf.U:
This 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_sfio"
From d_sfio.U:
This variable conditionally defines the "USE_SFIO" symbol, and
indicates whether sfio is available (and should be used).
"d_shm"
From d_shm.U:
This variable conditionally defines the "HAS_SHM" symbol, which
indicates that the entire shm*(2) library is present.
"d_shmat"
From d_shmat.U:
This variable conditionally defines the "HAS_SHMAT" symbol, which
indicates to the C program that the shmat() routine is available.
"d_shmatprototype"
From d_shmat.U:
This variable conditionally defines the "HAS_SHMAT_PROTOTYPE" symbol,
which indicates that sys/shm.h has a prototype for shmat.
"d_shmctl"
From d_shmctl.U:
This variable conditionally defines the "HAS_SHMCTL" symbol, which
indicates to the C program that the shmctl() routine is available.
"d_shmdt"
From d_shmdt.U:
This variable conditionally defines the "HAS_SHMDT" symbol, which
indicates to the C program that the shmdt() routine is available.
"d_shmget"
From d_shmget.U:
This variable conditionally defines the "HAS_SHMGET" symbol, which
indicates to the C program that the shmget() routine is available.
"d_sigaction"
From d_sigaction.U:
This variable conditionally defines the "HAS_SIGACTION" symbol, which
indicates that the Vr4 sigaction() routine is available.
"d_sigprocmask"
From d_sigprocmask.U:
This variable conditionally defines "HAS_SIGPROCMASK" if sigprocmask()
is available to examine or change the signal mask of the calling
process.
"d_sigsetjmp"
From d_sigsetjmp.U:
This 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_socket"
From d_socket.U:
This variable conditionally defines "HAS_SOCKET", which indicates that
the "BSD" socket interface is supported.
"d_socklen_t"
From d_socklen_t.U:
This symbol will be defined if the C compiler supports socklen_t.
"d_sockpair"
From d_socket.U:
This variable conditionally defines the "HAS_SOCKETPAIR" symbol, which
indicates that the "BSD" socketpair() is supported.
"d_socks5_init"
From d_socks5_init.U:
This variable conditionally defines the HAS_SOCKS5_INIT symbol, which
indicates to the C program that the socks5_init() routine is available.
"d_sqrtl"
From d_sqrtl.U:
This variable conditionally defines the "HAS_SQRTL" symbol, which
indicates to the C program that the sqrtl() routine is available.
"d_statblks"
From d_statblks.U:
This variable conditionally defines "USE_STAT_BLOCKS" if this system
has a stat structure declaring st_blksize and st_blocks.
"d_statfs_f_flags"
From d_statfs_f_flags.U:
This 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_s"
From d_statfs_s.U:
This variable conditionally defines the "HAS_STRUCT_STATFS" symbol,
which indicates that the struct statfs is supported.
"d_statvfs"
From d_statvfs.U:
This variable conditionally defines the "HAS_STATVFS" symbol, which
indicates to the C program that the statvfs() routine is available.
"d_stdio_cnt_lval"
From d_stdstdio.U:
This variable conditionally defines "STDIO_CNT_LVALUE" if the
"FILE_cnt" macro can be used as an lvalue.
"d_stdio_ptr_lval"
From d_stdstdio.U:
This variable conditionally defines "STDIO_PTR_LVALUE" if the
"FILE_ptr" macro can be used as an lvalue.
"d_stdio_ptr_lval_nochange_cnt"
From d_stdstdio.U:
This 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_cnt"
From d_stdstdio.U:
This 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_array"
From stdio_streams.U:
This variable tells whether there is an array holding the stdio
streams.
"d_stdiobase"
From d_stdstdio.U:
This variable conditionally defines "USE_STDIO_BASE" if this system has
a "FILE" structure declaring a usable _base field (or equivalent) in
stdio.h.
"d_stdstdio"
From d_stdstdio.U:
This 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_strchr"
From d_strchr.U:
This variable conditionally defines "HAS_STRCHR" if strchr() and
strrchr() are available for string searching.
"d_strcoll"
From d_strcoll.U:
This variable conditionally defines "HAS_STRCOLL" if strcoll() is
available to compare strings using collating information.
"d_strctcpy"
From d_strctcpy.U:
This variable conditionally defines the "USE_STRUCT_COPY" symbol, which
indicates to the C program that this C compiler knows how to copy
structures.
"d_strerrm"
From d_strerror.U:
This variable holds what Strerrr is defined as to translate an error
code condition into an error message string. It could be "strerror" or
a more "complex" macro emulating strrror with sys_errlist[], or the
"unknown" string when both strerror and sys_errlist are missing.
"d_strerror"
From d_strerror.U:
This variable conditionally defines "HAS_STRERROR" if strerror() is
available to translate error numbers to strings.
"d_strtod"
From d_strtod.U:
This 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_strtol"
From d_strtol.U:
This 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_strtold"
From d_strtold.U:
This variable conditionally defines the "HAS_STRTOLD" symbol, which
indicates to the C program that the strtold() routine is available.
"d_strtoll"
From d_strtoll.U:
This variable conditionally defines the "HAS_STRTOLL" symbol, which
indicates to the C program that the strtoll() routine is available.
"d_strtoq"
From d_strtoq.U:
This variable conditionally defines the "HAS_STRTOQ" symbol, which
indicates to the C program that the strtoq() routine is available.
"d_strtoul"
From d_strtoul.U:
This 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_strtoull"
From d_strtoull.U:
This variable conditionally defines the "HAS_STRTOULL" symbol, which
indicates to the C program that the strtoull() routine is available.
"d_strtouq"
From d_strtouq.U:
This variable conditionally defines the "HAS_STRTOUQ" symbol, which
indicates to the C program that the strtouq() routine is available.
"d_strxfrm"
From d_strxfrm.U:
This variable conditionally defines "HAS_STRXFRM" if strxfrm() is
available to transform strings.
"d_suidsafe"
From d_dosuid.U:
This variable conditionally defines "SETUID_SCRIPTS_ARE_SECURE_NOW" if
setuid scripts can be secure. This test looks in /dev/fd/.
"d_symlink"
From d_symlink.U:
This variable conditionally defines the "HAS_SYMLINK" symbol, which
indicates to the C program that the symlink() routine is available to
create symbolic links.
"d_syscall"
From d_syscall.U:
This variable conditionally defines "HAS_SYSCALL" if syscall() is
available call arbitrary system calls.
"d_sysconf"
From d_sysconf.U:
This 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_sysernlst"
From d_strerror.U:
This variable conditionally defines "HAS_SYS_ERRNOLIST" if
sys_errnolist[] is available to translate error numbers to the symbolic
name.
"d_syserrlst"
From d_strerror.U:
This variable conditionally defines "HAS_SYS_ERRLIST" if sys_errlist[]
is available to translate error numbers to strings.
"d_system"
From d_system.U:
This variable conditionally defines "HAS_SYSTEM" if system() is
available to issue a shell command.
"d_tcgetpgrp"
From d_tcgtpgrp.U:
This 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_tcsetpgrp"
From d_tcstpgrp.U:
This 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_telldir"
From d_readdir.U:
This variable conditionally defines "HAS_TELLDIR" if telldir() is
available.
"d_telldirproto"
From d_telldirproto.U:
This 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_time"
From d_time.U:
This variable conditionally defines the "HAS_TIME" symbol, which
indicates that the time() routine exists. The time() routine is
normaly provided on "UNIX" systems.
"d_times"
From d_times.U:
This 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_truncate"
From d_truncate.U:
This variable conditionally defines "HAS_TRUNCATE" if truncate() is
available to truncate files.
"d_tzname"
From d_tzname.U:
This variable conditionally defines "HAS_TZNAME" if tzname[] is
available to access timezone names.
"d_umask"
From d_umask.U:
This 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_uname"
From d_gethname.U:
This 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_semun"
From d_union_semun.U:
This variable conditionally defines "HAS_UNION_SEMUN" if the union
semun is defined by including <sys/sem.h>.
"d_ustat"
From d_ustat.U:
This variable conditionally defines "HAS_USTAT" if ustat() is available
to query file system statistics by dev_t.
"d_vendorarch"
From vendorarch.U:
This variable conditionally defined "PERL_VENDORARCH".
"d_vendorbin"
From vendorbin.U:
This variable conditionally defines "PERL_VENDORBIN".
"d_vendorlib"
From vendorlib.U:
This variable conditionally defines "PERL_VENDORLIB".
"d_vfork"
From d_vfork.U:
This variable conditionally defines the "HAS_VFORK" symbol, which
indicates the vfork() routine is available.
"d_void_closedir"
From d_closedir.U:
This variable conditionally defines "VOID_CLOSEDIR" if closedir() does
not return a value.
"d_voidsig"
From d_voidsig.U:
This variable conditionally defines "VOIDSIG" if this system declares
"void (*signal(...))()" in signal.h. The old way was to declare it as
"int (*signal(...))()".
"d_voidtty"
From i_sysioctl.U:
This 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_volatile"
From d_volatile.U:
This variable conditionally defines the "HASVOLATILE" symbol, which
indicates to the C program that this C compiler knows about the
volatile declaration.
"d_vprintf"
From d_vprintf.U:
This 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_wait4"
From d_wait4.U:
This variable conditionally defines the HAS_WAIT4 symbol, which
indicates the wait4() routine is available.
"d_waitpid"
From d_waitpid.U:
This variable conditionally defines "HAS_WAITPID" if waitpid() is
available to wait for child process.
"d_wcstombs"
From d_wcstombs.U:
This 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_wctomb"
From d_wctomb.U:
This 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_xenix"
From Guess.U:
This variable conditionally defines the symbol "XENIX", which alerts
the C program that it runs under Xenix.
"date"
From Loc.U:
This variable is used internally by Configure to determine the full
pathname (if any) of the date program. After Configure runs, the value
is reset to a plain "date" and is not useful.
"db_hashtype"
From i_db.U:
This variable contains the type of the hash structure element in the
<db.h> header file. In older versions of "DB", it was int, while in
newer ones it is u_int32_t.
"db_prefixtype"
From i_db.U:
This variable contains the type of the prefix structure element in the
<db.h> header file. In older versions of "DB", it was int, while in
newer ones it is size_t.
"defvoidused"
From voidflags.U:
This variable contains the default value of the "VOIDUSED" symbol (15).
"direntrytype"
From i_dirent.U:
This 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.
"dlext"
From dlext.U:
This variable contains the extension that is to be used for the
dynamically loaded modules that perl generaties.
"dlsrc"
From dlsrc.U:
This variable contains the name of the dynamic loading file that will
be used with the package.
"doublesize"
From doublesize.U:
This variable contains the value of the "DOUBLESIZE" symbol, which
indicates to the C program how many bytes there are in a double.
"drand01"
From randfunc.U:
Indicates the macro to be used to generate normalized random numbers.
Uses randfunc, often divided by (double) (((unsigned long) 1 <<
randbits)) in order to normalize the result. In C programs, the macro
"Drand01" is mapped to drand01.
"dynamic_ext"
From Extensions.U:
This variable holds a list of "XS" extension files we want to link
dynamically into the package. It is used by Makefile.
e
"eagain"
From nblock_io.U:
This variable bears the symbolic errno code set by read() when no data
is present on the file and non-blocking I/O was enabled (otherwise,
read() blocks naturally).
"ebcdic"
From ebcdic.U:
This 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
"echo"
From Loc.U:
This variable is used internally by Configure to determine the full
pathname (if any) of the echo program. After Configure runs, the value
is reset to a plain "echo" and is not useful.
"egrep"
From Loc.U:
This variable is used internally by Configure to determine the full
pathname (if any) of the egrep program. After Configure runs, the
value is reset to a plain "egrep" and is not useful.
"emacs"
From Loc.U:
This variable is defined but not used by Configure. The value is a
plain '' and is not useful.
"eunicefix"
From Init.U:
When running under Eunice this variable contains a command which will
convert a shell script to the proper form of text file for it to be
executable by the shell. On other systems it is a no-op.
"exe_ext"
From Unix.U:
This is an old synonym for _exe.
"expr"
From Loc.U:
This variable is used internally by Configure to determine the full
pathname (if any) of the expr program. After Configure runs, the value
is reset to a plain "expr" and is not useful.
"extensions"
From Extensions.U:
This 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.
f
"fflushall"
From fflushall.U:
This symbol, if defined, tells that to flush all pending stdio output
one must loop through all the stdio file handles stored in an array and
fflush them. Note that if fflushNULL is defined, fflushall will not
even be probed for and will be left undefined.
"fflushNULL"
From fflushall.U:
This symbol, if defined, tells that fflush("NULL") does flush all
pending stdio output.
"find"
From Loc.U:
This variable is defined but not used by Configure. The value is a
plain '' and is not useful.
"firstmakefile"
From Unix.U:
This variable defines the first file searched by make. On unix, it is
makefile (then Makefile). On case-insensitive systems, it might be
something else. This is only used to deal with convoluted make depend
tricks.
"flex"
From Loc.U:
This variable is defined but not used by Configure. The value is a
plain '' and is not useful.
"fpossize"
From fpossize.U:
This variable contains the size of a fpostype in bytes.
"fpostype"
From fpostype.U:
This variable defines Fpos_t to be something like fpos_t, long, uint,
or whatever type is used to declare file positions in libc.
"freetype"
From mallocsrc.U:
This variable contains the return type of free(). It is usually void,
but occasionally int.
"full_ar"
From Loc_ar.U:
This variable contains the full pathname to "ar", whether or not the
user has specified "portability". This is only used in the
Makefile.SH.
"full_csh"
From d_csh.U:
This 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_sed"
From Loc_sed.U:
This 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.
g
"gccosandvers"
From gccvers.U:
If "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.
"gccversion"
From gccvers.U:
If "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.
"gidformat"
From gidf.U:
This variable contains the format string used for printing a Gid_t.
"gidsign"
From gidsign.U:
This variable contains the signedness of a gidtype. 1 for unsigned, -1
for signed.
"gidsize"
From gidsize.U:
This variable contains the size of a gidtype in bytes.
"gidtype"
From gidtype.U:
This variable defines Gid_t to be something like gid_t, int, ushort, or
whatever type is used to declare the return type of getgid().
Typically, it is the type of group ids in the kernel.
"glibpth"
From libpth.U:
This variable holds the general path (space-separated) used to find
libraries. It may contain directories that do not exist on this
platform, libpth is the cleaned-up version.
"grep"
From Loc.U:
This variable is used internally by Configure to determine the full
pathname (if any) of the grep program. After Configure runs, the value
is reset to a plain "grep" and is not useful.
"groupcat"
From nis.U:
This variable contains a command that produces the text of the
/etc/group file. This is normally "cat /etc/group", but can be "ypcat
group" when "NIS" is used. On some systems, such as os390, there may
be no equivalent command, in which case this variable is unset.
"groupstype"
From groupstype.U:
This variable defines Groups_t to be something like gid_t, int, ushort,
or whatever type is used for the second argument to getgroups() and
setgroups(). Usually, this is the same as gidtype (gid_t), but
sometimes it isn't.
"gzip"
From Loc.U:
This variable is used internally by Configure to determine the full
pathname (if any) of the gzip program. After Configure runs, the value
is reset to a plain "gzip" and is not useful.
h
"h_fcntl"
From h_fcntl.U:
This is variable gets set in various places to tell i_fcntl that
<fcntl.h> should be included.
"h_sysfile"
From h_sysfile.U:
This is variable gets set in various places to tell i_sys_file that
<sys/file.h> should be included.
"hint"
From Oldconfig.U:
Gives the type of hints used for previous answers. May be one of
"default", "recommended" or "previous".
"hostcat"
From nis.U:
This variable contains a command that produces the text of the
/etc/hosts file. This is normally "cat /etc/hosts", but can be "ypcat
hosts" when "NIS" is used. On some systems, such as os390, there may
be no equivalent command, in which case this variable is unset.
i
"i16size"
From perlxv.U:
This variable is the size of an I16 in bytes.
"i16type"
From perlxv.U:
This variable contains the C type used for Perl's I16.
"i32size"
From perlxv.U:
This variable is the size of an I32 in bytes.
"i32type"
From perlxv.U:
This variable contains the C type used for Perl's I32.
"i64size"
From perlxv.U:
This variable is the size of an I64 in bytes.
"i64type"
From perlxv.U:
This variable contains the C type used for Perl's I64.
"i8size"
From perlxv.U:
This variable is the size of an I8 in bytes.
"i8type"
From perlxv.U:
This variable contains the C type used for Perl's I8.
"i_arpainet"
From i_arpainet.U:
This variable conditionally defines the "I_ARPA_INET" symbol, and
indicates whether a C program should include <arpa/inet.h>.
"i_bsdioctl"
From i_sysioctl.U:
This variable conditionally defines the "I_SYS_BSDIOCTL" symbol, which
indicates to the C program that <sys/bsdioctl.h> exists and should be
included.
"i_db"
From i_db.U:
This variable conditionally defines the "I_DB" symbol, and indicates
whether a C program may include Berkeley's "DB" include file <db.h>.
"i_dbm"
From i_dbm.U:
This variable conditionally defines the "I_DBM" symbol, which indicates
to the C program that <dbm.h> exists and should be included.
"i_dirent"
From i_dirent.U:
This variable conditionally defines "I_DIRENT", which indicates to the
C program that it should include <dirent.h>.
"i_dld"
From i_dld.U:
This 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_dlfcn"
From i_dlfcn.U:
This variable conditionally defines the "I_DLFCN" symbol, which
indicates to the C program that <dlfcn.h> exists and should be
included.
"i_fcntl"
From i_fcntl.U:
This variable controls the value of "I_FCNTL" (which tells the C
program to include <fcntl.h>).
"i_float"
From i_float.U:
This 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_gdbm"
From i_gdbm.U:
This variable conditionally defines the "I_GDBM" symbol, which
indicates to the C program that <gdbm.h> exists and should be included.
"i_grp"
From i_grp.U:
This variable conditionally defines the "I_GRP" symbol, and indicates
whether a C program should include <grp.h>.
"i_iconv"
From i_iconv.U:
This variable conditionally defines the "I_ICONV" symbol, and indicates
whether a C program should include <iconv.h>.
"i_ieeefp"
From i_ieeefp.U:
This variable conditionally defines the "I_IEEEFP" symbol, and
indicates whether a C program should include <ieeefp.h>.
"i_inttypes"
From i_inttypes.U:
This variable conditionally defines the "I_INTTYPES" symbol, and
indicates whether a C program should include <inttypes.h>.
"i_libutil"
From i_libutil.U:
This variable conditionally defines the "I_LIBUTIL" symbol, and
indicates whether a C program should include <libutil.h>.
"i_limits"
From i_limits.U:
This 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_locale"
From i_locale.U:
This variable conditionally defines the "I_LOCALE" symbol, and
indicates whether a C program should include <locale.h>.
"i_machcthr"
From i_machcthr.U:
This variable conditionally defines the "I_MACH_CTHREADS" symbol, and
indicates whether a C program should include <mach/cthreads.h>.
"i_malloc"
From i_malloc.U:
This variable conditionally defines the "I_MALLOC" symbol, and
indicates whether a C program should include <malloc.h>.
"i_math"
From i_math.U:
This variable conditionally defines the "I_MATH" symbol, and indicates
whether a C program may include <math.h>.
"i_memory"
From i_memory.U:
This variable conditionally defines the "I_MEMORY" symbol, and
indicates whether a C program should include <memory.h>.
"i_mntent"
From i_mntent.U:
This variable conditionally defines the "I_MNTENT" symbol, and
indicates whether a C program should include <mntent.h>.
"i_ndbm"
From i_ndbm.U:
This variable conditionally defines the "I_NDBM" symbol, which
indicates to the C program that <ndbm.h> exists and should be included.
"i_netdb"
From i_netdb.U:
This variable conditionally defines the "I_NETDB" symbol, and indicates
whether a C program should include <netdb.h>.
"i_neterrno"
From i_neterrno.U:
This variable conditionally defines the "I_NET_ERRNO" symbol, which
indicates to the C program that <net/errno.h> exists and should be
included.
"i_netinettcp"
From i_netinettcp.U:
This variable conditionally defines the "I_NETINET_TCP" symbol, and
indicates whether a C program should include <netinet/tcp.h>.
"i_niin"
From i_niin.U:
This variable conditionally defines "I_NETINET_IN", which indicates to
the C program that it should include <netinet/in.h>. Otherwise, you may
try <sys/in.h>.
"i_poll"
From i_poll.U:
This variable conditionally defines the "I_POLL" symbol, and indicates
whether a C program should include <poll.h>.
"i_prot"
From i_prot.U:
This variable conditionally defines the "I_PROT" symbol, and indicates
whether a C program should include <prot.h>.
"i_pthread"
From i_pthread.U:
This variable conditionally defines the "I_PTHREAD" symbol, and
indicates whether a C program should include <pthread.h>.
"i_pwd"
From i_pwd.U:
This variable conditionally defines "I_PWD", which indicates to the C
program that it should include <pwd.h>.
"i_rpcsvcdbm"
From i_dbm.U:
This 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_sfio"
From i_sfio.U:
This variable conditionally defines the "I_SFIO" symbol, and indicates
whether a C program should include <sfio.h>.
"i_sgtty"
From i_termio.U:
This variable conditionally defines the "I_SGTTY" symbol, which
indicates to the C program that it should include <sgtty.h> rather than
<termio.h>.
"i_shadow"
From i_shadow.U:
This variable conditionally defines the "I_SHADOW" symbol, and
indicates whether a C program should include <shadow.h>.
"i_socks"
From i_socks.U:
This variable conditionally defines the "I_SOCKS" symbol, and indicates
whether a C program should include <socks.h>.
"i_stdarg"
From i_varhdr.U:
This variable conditionally defines the "I_STDARG" symbol, which
indicates to the C program that <stdarg.h> exists and should be
included.
"i_stddef"
From i_stddef.U:
This variable conditionally defines the "I_STDDEF" symbol, which
indicates to the C program that <stddef.h> exists and should be
included.
"i_stdlib"
From i_stdlib.U:
This variable conditionally defines the "I_STDLIB" symbol, which
indicates to the C program that <stdlib.h> exists and should be
included.
"i_string"
From i_string.U:
This variable conditionally defines the "I_STRING" symbol, which
indicates that <string.h> should be included rather than <strings.h>.
"i_sunmath"
From i_sunmath.U:
This variable conditionally defines the "I_SUNMATH" symbol, and
indicates whether a C program should include <sunmath.h>.
"i_sysaccess"
From i_sysaccess.U:
This variable conditionally defines the "I_SYS_ACCESS" symbol, and
indicates whether a C program should include <sys/access.h>.
"i_sysdir"
From i_sysdir.U:
This variable conditionally defines the "I_SYS_DIR" symbol, and
indicates whether a C program should include <sys/dir.h>.
"i_sysfile"
From i_sysfile.U:
This 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_sysfilio"
From i_sysioctl.U:
This 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_sysin"
From i_niin.U:
This variable conditionally defines "I_SYS_IN", which indicates to the
C program that it should include <sys/in.h> instead of <netinet/in.h>.
"i_sysioctl"
From i_sysioctl.U:
This variable conditionally defines the "I_SYS_IOCTL" symbol, which
indicates to the C program that <sys/ioctl.h> exists and should be
included.
"i_syslog"
From i_syslog.U:
This variable conditionally defines the "I_SYSLOG" symbol, and
indicates whether a C program should include <syslog.h>.
"i_sysmman"
From i_sysmman.U:
This variable conditionally defines the "I_SYS_MMAN" symbol, and
indicates whether a C program should include <sys/mman.h>.
"i_sysmode"
From i_sysmode.U:
This variable co