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man : Config(3p)
Config(3p) Perl Programmers Reference Guide Config(3p)
NAME
Config - access Perl configuration information
SYNOPSIS
use Config;
if ($Config{usethreads}) {
print "has thread support\n"
}
use Config qw(myconfig config_sh config_vars config_re);
print myconfig();
print config_sh();
print config_re();
config_vars(qw(osname archname));
DESCRIPTION
The Config module contains all the information that was
available to the "Configure" program at Perl build time
(over 900 values).
Shell variables from the config.sh file (written by Con-
figure) are stored in the readonly-variable %Config,
indexed by their names.
Values stored in config.sh as 'undef' are returned as
undefined values. The perl "exists" function can be used
to check if a named variable exists.
myconfig()
Returns a textual summary of the major perl configura-
tion values. See also "-V" in "Switches" in perlrun.
config_sh()
Returns the entire perl configuration information in
the form of the original config.sh shell variable
assignment script.
config_re($regex)
Like config_sh() but returns, as a list, only the con-
fig entries who's names match the $regex.
config_vars(@names)
Prints to STDOUT the values of the named configuration
variable. Each is printed on a separate line in the
form:
name='value';
Names which are unknown are output as
"name='UNKNOWN';". See also "-V:name" in "Switches"
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in perlrun.
EXAMPLE
Here's a more sophisticated example of using %Config:
use Config;
use strict;
my %sig_num;
my @sig_name;
unless($Config{sig_name} && $Config{sig_num}) {
die "No sigs?";
} else {
my @names = split ' ', $Config{sig_name};
@sig_num{@names} = split ' ', $Config{sig_num};
foreach (@names) {
$sig_name[$sig_num{$_}] ||= $_;
}
}
print "signal #17 = $sig_name[17]\n";
if ($sig_num{ALRM}) {
print "SIGALRM is $sig_num{ALRM}\n";
}
WARNING
Because this information is not stored within the perl
executable itself it is possible (but unlikely) that the
information does not relate to the actual perl binary
which is being used to access it.
The Config module is installed into the architecture and
version specific library directory ($Config{installarch-
lib}) 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 documenta-
tion in such cases.
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_
"_a"
From Unix.U:
This variable defines the extension used for ordinary
library files. For unix, it is .a. The . is
included. Other possible values include .lib.
"_exe"
From Unix.U:
This variable defines the extension used for exe-
cutable files. "DJGPP", Cygwin and OS/2 use .exe.
Stratus "VOS" uses .pm. On operating systems which do
not require a specific extension for executable files,
this variable is empty.
"_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 com-
mand line option, but you'd better know what you are
doing.
"afsroot"
From afs.U:
This variable is by default set to /afs. In the
unlikely case this is not the correct root, it is pos-
sible to override this with a hint value or command
line option. This will be used in subsequent tests
for AFSness in the Perl configure and test process.
"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.
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"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 quali-
fied 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 num-
ber, like 5.00563.
perl.c:incpush() and lib/lib.pm will automatically
search in $sitelib/.. for older directories back to
the limit specified by these api_ variables. This is
only useful if you have a perl library directory tree
structured like the default one. See "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 inc_version_list.U.
"XXX" To do: Since compatibility can depend on com-
pile time options (such as bincompat, longlong, etc.)
it should (perhaps) be set by Configure, but currently
it isn't. Currently, we read a hard-wired value from
patchlevel.h. Perhaps what we ought to do is take the
hard-wired value from patchlevel.h but then modify it
if the current Configure options warrant. patch-
level.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.
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"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 ver-
sioned 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 pro-
gram. 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 expan-
sion.
"archlibexp"
From archlib.U:
This variable is the same as the archlib variable, but
is filename expanded at configuration time, for conve-
nient use.
"archname64"
From use64bits.U:
This variable is used for the 64-bitness part of
$archname.
"archname"
From archname.U:
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This variable is a short name to characterize the cur-
rent 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.
"asctime_r_proto"
From d_asctime_r.U:
This variable encodes the prototype of asctime_r. It
is zero if d_asctime_r is undef, and one of the "REEN-
TRANT_PROTO_T_ABC" macros of reentr.h if d_asctime_r
is defined.
"awk"
From Loc.U:
This variable is used internally by Configure to
determine the full pathname (if any) of the awk pro-
gram. 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 substitu-
tion.
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"binexp"
From bin.U:
This is the same as the bin variable, but is filename
expanded at configuration time, for use in your make-
files.
"bison"
From Loc.U:
This variable is used internally by Configure to
determine the full pathname (if any) of the bison pro-
gram. After Configure runs, the value is reset to a
plain "bison" 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 pro-
gram. 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 a "UV". In the
following, larger digits indicate more significance.
The variable byteorder is either 4321 on a big-endian
machine, or 1234 on a little-endian, or 87654321 on a
Cray ... or 3412 with weird order !
c
"c" From n.U:
This variable contains the \c string if that is what
causes the echo command to suppress newline. Other-
wise 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 difficul-
ties 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 argu-
ment expression list
"cat"
From Loc.U:
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This variable is used internally by Configure to
determine the full pathname (if any) of the cat pro-
gram. 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 refer-
ences 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".
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"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 con-
tain 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 Config-
ure. 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 con-
figuration 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 used internally by Configure to
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Config(3p) Perl Programmers Reference Guide Config(3p)
determine the full pathname (if any) of the chmod pro-
gram. After Configure runs, the value is reset to a
plain "chmod" 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 pro-
gram. 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.
"contains"
From contains.U:
This variable holds the command to do a grep with a
proper return status. On most sane systems it is sim-
ply "grep". On insane systems it is a grep followed
by a cat followed by a test. This variable is primar-
ily 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 pro-
gram. 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.
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"cpp"
From Loc.U:
This variable is used internally by Configure to
determine the full pathname (if any) of the cpp pro-
gram. 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 con-
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-sepa-
rated 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 differ-
ent from the one used by the C compiler. Don't forget
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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 out-
put to stdout. It is primarily used by other Config-
ure 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 ccsym-
bols and cppccsymbols. The list is a space-separated
list of symbol=value tokens.
"crypt_r_proto"
From d_crypt_r.U:
This variable encodes the prototype of crypt_r. It is
zero if d_crypt_r is undef, and one of the "REEN-
TRANT_PROTO_T_ABC" macros of reentr.h if d_crypt_r is
defined.
"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 pro-
gram. After Configure runs, the value is reset to a
plain "csh" and is not useful.
"ctermid_r_proto"
From d_ctermid_r.U:
This variable encodes the prototype of ctermid_r. It
is zero if d_ctermid_r is undef, and one of the "REEN-
TRANT_PROTO_T_ABC" macros of reentr.h if d_ctermid_r
is defined.
"ctime_r_proto"
From d_ctime_r.U:
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This variable encodes the prototype of ctime_r. It is
zero if d_ctime_r is undef, and one of the "REEN-
TRANT_PROTO_T_ABC" macros of reentr.h if d_ctime_r is
defined.
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_aintl"
From d_aintl.U:
This variable conditionally defines the "HAS_AINTL"
symbol, which indicates to the C program that the
aintl() routine is available. If copysignl is also
present we can emulate modfl.
"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_asctime_r"
From d_asctime_r.U:
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This variable conditionally defines the "HAS_ASC-
TIME_R" symbol, which indicates to the C program that
the asctime_r() routine is available.
"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_attribute_format"
From d_attribut_format.U:
This variable conditionally defines "HASATTRIBUTE_FOR-
MAT", which indicates the C compiler can check for
printf-like formats.
"d_attribute_malloc"
From d_attribute_malloc.U:
This variable conditionally defines "HASATTRIBUTE_MAL-
LOC", which indicates the C compiler can understand
functions as having malloc-like semantics.
"d_attribute_nonnull"
From d_attribute_nonnull.U:
This variable conditionally defines "HASATTRIBUTE_NON-
NULL", which indicates that the C compiler can know
that certain arguments must not be "NULL", and will
check accordingly at compile time.
"d_attribute_noreturn"
From d_attribute_noreturn.U:
This variable conditionally defines "HASAT-
TRIBUTE_NORETURN", which indicates that the C compiler
can know that certain functions are guaranteed never
to return.
"d_attribute_pure"
From d_attribute_pure.U:
This variable conditionally defines "HASAT-
TRIBUTE_PURE", which indicates that the C compiler can
know that certain functions are "pure" functions,
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Config(3p) Perl Programmers Reference Guide Config(3p)
meaning that they have no side effects, and only rely
on function input and/or global data for their
results.
"d_attribute_unused"
From d_attribute_unused.U:
This variable conditionally defines "HASAT-
TRIBUTE_UNUSED", which indicates that the C compiler
can know that certain variables and arguments may not
always be used, and to not throw warnings if they
don't get used.
"d_attribute_warn_unused_result"
From d_attribute_warn_unused_result.U:
This variable conditionally defines "HASAT-
TRIBUTE_WARN_UNUSED_RESULT", which indicates that the
C compiler can know that certain functions have a
return values that must not be ignored, such as mal-
loc() or open().
"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_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
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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 mem-
ory 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" sym-
bol, 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_class"
From d_class.U:
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Config(3p) Perl Programmers Reference Guide Config(3p)
This variable conditionally defines the "HAS_CLASS"
symbol, which indicates to the C program that the
class() routine is available.
"d_clearenv"
From d_clearenv.U:
This variable conditionally defines the "HAS_CLEARENV"
symbol, which indicates to the C program that the
clearenv () routine is available.
"d_closedir"
From d_closedir.U:
This variable conditionally defines "HAS_CLOSEDIR" if
closedir() is available.
"d_cmsghdr_s"
From d_cmsghdr_s.U:
This variable conditionally defines the
"HAS_STRUCT_CMSGHDR" symbol, which indicates that the
struct cmsghdr is supported.
"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_copysignl"
From d_copysignl.U:
This variable conditionally defines the "HAS_COPY-
SIGNL" symbol, which indicates to the C program that
the copysignl() routine is available. If aintl is
also present we can emulate modfl.
"d_crypt"
From d_crypt.U:
This variable conditionally defines the "CRYPT" sym-
bol, which indicates to the C program that the crypt()
routine is available to encrypt passwords and the
like.
"d_crypt_r"
From d_crypt_r.U:
This variable conditionally defines the "HAS_CRYPT_R"
symbol, which indicates to the C program that the
crypt_r() routine is available.
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Config(3p) Perl Programmers Reference Guide Config(3p)
"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_ctermid_r"
From d_ctermid_r.U:
This variable conditionally defines the "HAS_CTER-
MID_R" symbol, which indicates to the C program that
the ctermid_r() routine is available.
"d_ctime_r"
From d_ctime_r.U:
This variable conditionally defines the "HAS_CTIME_R"
symbol, which indicates to the C program that the
ctime_r() routine is available.
"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_dbminitproto"
From d_dbminitproto.U:
This variable conditionally defines the
"HAS_DBMINIT_PROTO" symbol, which indicates to the C
program that the system provides a prototype for the
dbminit() function. Otherwise, it is up to the pro-
gram to supply one.
"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.
perl v5.8.8 2002-10-27 18
Config(3p) Perl Programmers Reference Guide Config(3p)
"d_dirfd"
From d_dirfd.U:
This variable conditionally defines the "HAS_DIRFD"
constant, which indicates to the C program that
dirfd() is available to return the file descriptor of
a directory stream.
"d_dirnamlen"
From i_dirent.U:
This variable conditionally defines "DIRNAMLEN", which
indicates to the C program that the length of direc-
tory 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_drand48_r"
From d_drand48_r.U:
This variable conditionally defines the HAS_DRAND48_R
symbol, which indicates to the C program that the
drand48_r() routine is available.
"d_drand48proto"
From d_drand48proto.U:
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Config(3p) Perl Programmers Reference Guide Config(3p)
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 pro-
gram 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 eac-
cess() 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 end-
grent() routine is available for sequential access of
the group database.
"d_endgrent_r"
From d_endgrent_r.U:
This variable conditionally defines the "HAS_END-
GRENT_R" symbol, which indicates to the C program that
the endgrent_r() routine is available.
"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_endhostent_r"
From d_endhostent_r.U:
This variable conditionally defines the "HAS_ENDHOS-
TENT_R" symbol, which indicates to the C program that
the endhostent_r() routine is available.
"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.
perl v5.8.8 2002-10-27 20
Config(3p) Perl Programmers Reference Guide Config(3p)
"d_endnetent_r"
From d_endnetent_r.U:
This variable conditionally defines the "HAS_ENDNE-
TENT_R" symbol, which indicates to the C program that
the endnetent_r() routine is available.
"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_endprotoent_r"
From d_endprotoent_r.U:
This variable conditionally defines the "HAS_ENDPRO-
TOENT_R" symbol, which indicates to the C program that
the endprotoent_r() routine is available.
"d_endpwent"
From d_endpwent.U:
This variable conditionally defines the "HAS_ENDPWENT"
symbol, which indicates to the C program that the end-
pwent() routine is available for sequential access of
the passwd database.
"d_endpwent_r"
From d_endpwent_r.U:
This variable conditionally defines the "HAS_ENDP-
WENT_R" symbol, which indicates to the C program that
the endpwent_r() routine is available.
"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_endservent_r"
From d_endservent_r.U:
This variable conditionally defines the "HAS_ENDSER-
VENT_R" symbol, which indicates to the C program that
the endservent_r() routine is available.
"d_eofnblk"
From nblock_io.U:
This variable conditionally defines "EOF_NONBLOCK" if
perl v5.8.8 2002-10-27 21
Config(3p) Perl Programmers Reference Guide Config(3p)
"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_faststdio"
From d_faststdio.U:
This variable conditionally defines the
"HAS_FAST_STDIO" symbol, which indicates to the C pro-
gram that the "fast stdio" is available to manipulate
the stdio buffers directly.
"d_fchdir"
From d_fchdir.U:
This variable conditionally defines the "HAS_FCHDIR"
symbol, which indicates to the C program that the
fchdir() routine is available.
"d_fchmod"
From d_fchmod.U:
This variable conditionally defines the "HAS_FCHMOD"
symbol, which indicates to the C program that the fch-
mod() 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.
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Config(3p) Perl Programmers Reference Guide Config(3p)
"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 com-
piler 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 com-
piler 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 indi-
cator.
"d_finite"
From d_finite.U:
This variable conditionally defines the "HAS_FINITE"
symbol, which indicates to the C program that the
finite() routine is available.
"d_finitel"
From d_finitel.U:
This variable conditionally defines the "HAS_FINITEL"
symbol, which indicates to the C program that the
finitel() routine is available.
"d_flexfnam"
From d_flexfnam.U:
This variable conditionally defines the "FLEXFILE-
NAMES" symbol, which indicates that the system sup-
ports filenames longer than 14 characters.
perl v5.8.8 2002-10-27 23
Config(3p) Perl Programmers Reference Guide Config(3p)
"d_flock"
From d_flock.U:
This variable conditionally defines "HAS_FLOCK" if
flock() is available to do file locking.
"d_flockproto"
From d_flockproto.U:
This variable conditionally defines the
"HAS_FLOCK_PROTO" symbol, which indicates to the C
program that the system provides a prototype for the
flock() function. Otherwise, it is up to the program
to supply one.
"d_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_fp_class"
From d_fp_class.U:
This variable conditionally defines the "HAS_FP_CLASS"
symbol, which indicates to the C program that the
fp_class() routine is available.
"d_fpathconf"
From d_pathconf.U:
This variable conditionally defines the "HAS_FPATH-
CONF" 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_fpclass"
From d_fpclass.U:
This variable conditionally defines the "HAS_FPCLASS"
symbol, which indicates to the C program that the
fpclass() routine is available.
"d_fpclassify"
From d_fpclassify.U:
This variable conditionally defines the "HAS_FPCLAS-
SIFY" symbol, which indicates to the C program that
the fpclassify() routine is available.
"d_fpclassl"
From d_fpclassl.U:
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Config(3p) Perl Programmers Reference Guide Config(3p)
This variable conditionally defines the "HAS_FPCLASSL"
symbol, which indicates to the C program that the
fpclassl() routine is available.
"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 indi-
cator.
"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:
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Config(3p) Perl Programmers Reference Guide Config(3p)
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_futimes"
From f_futimes.U:
This variable conditionally defines the "HAS_FUTIMES"
symbol, which indicates to the C program that the
futimes() routine is available.
"d_Gconvert"
From d_gconvert.U:
This variable holds what Gconvert is defined as to
convert floating point numbers into strings. By
default, Configure sets "this" macro to use the first
of gconvert, gcvt, or sprintf that pass
sprintf-%g-like behaviour tests. If perl is using
long doubles, the macro uses the first of the follow-
ing functions that pass Configure's tests: qgcvt,
sprintf (if Configure knows how to make sprintf format
long doubles--see sPRIgldbl), gconvert, gcvt, and
sprintf (casting to double). The gconvert_preference
and gconvert_ld_preference variables can be used to
alter Configure's preferences, for doubles and long
doubles, respectively. If present, they contain a
space-separated list of one or more of the above func-
tion names in the order they should be tried.
d_Gconvert may be set to override Configure with a
platform- specific function. If this function expects
a double, a different value may need to be set by the
uselongdouble.cbu call-back unit so that long doubles
can be formatted without loss of precision.
"d_getcwd"
From d_getcwd.U:
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Config(3p) Perl Programmers Reference Guide Config(3p)
This variable conditionally defines the "HAS_GETCWD"
symbol, which indicates to the C program that the
getcwd() routine is available to get the current work-
ing 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_GETFS-
STAT" 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 get-
grent() routine is available for sequential access of
the group database.
"d_getgrent_r"
From d_getgrent_r.U:
This variable conditionally defines the "HAS_GET-
GRENT_R" symbol, which indicates to the C program that
the getgrent_r() routine is available.
"d_getgrgid_r"
From d_getgrgid_r.U:
This variable conditionally defines the "HAS_GET-
GRGID_R" symbol, which indicates to the C program that
the getgrgid_r() routine is available.
"d_getgrnam_r"
From d_getgrnam_r.U:
This variable conditionally defines the "HAS_GETGR-
NAM_R" symbol, which indicates to the C program that
the getgrnam_r() routine is available.
"d_getgrps"
From d_getgrps.U:
This variable conditionally defines the "HAS_GET-
GROUPS" symbol, which indicates to the C program that
the getgroups() routine is available to get the list
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Config(3p) Perl Programmers Reference Guide Config(3p)
of process groups.
"d_gethbyaddr"
From d_gethbyad.U:
This variable conditionally defines the "HAS_GETHOST-
BYADDR" 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_GETHOST-
BYNAME" 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_GETHOST-
NAME" symbol, which indicates to the C program that
the gethostname() routine may be used to derive the
host name.
"d_gethostbyaddr_r"
From d_gethostbyaddr_r.U:
This variable conditionally defines the "HAS_GETHOST-
BYADDR_R" symbol, which indicates to the C program
that the gethostbyaddr_r() routine is available.
"d_gethostbyname_r"
From d_gethostbyname_r.U:
This variable conditionally defines the "HAS_GETHOST-
BYNAME_R" symbol, which indicates to the C program
that the gethostbyname_r() routine is available.
"d_gethostent_r"
From d_gethostent_r.U:
This variable conditionally defines the "HAS_GETHOS-
TENT_R" symbol, which indicates to the C program that
the gethostent_r() routine is available.
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"d_gethostprotos"
From d_gethostprotos.U:
This variable conditionally defines the "HAS_GETH-
OST_PROTOS" symbol, which indicates to the C program
that <netdb.h> supplies prototypes for the various
gethost*() functions. See also netdbtype.U for prob-
ing for various netdb types.
"d_getitimer"
From d_getitimer.U:
This variable conditionally defines the
"HAS_GETITIMER" symbol, which indicates to the C pro-
gram that the getitimer() routine is available.
"d_getlogin"
From d_getlogin.U:
This variable conditionally defines the "HAS_GETLOGIN"
symbol, which indicates to the C program that the get-
login() routine is available to get the login name.
"d_getlogin_r"
From d_getlogin_r.U:
This variable conditionally defines the "HAS_GETLO-
GIN_R" symbol, which indicates to the C program that
the getlogin_r() routine is available.
"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_GETMN-
TENT" 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_GETNET-
BYADDR" symbol, which indicates to the C program that
the getnetbyaddr() routine is available to look up
networks by their "IP" addresses.
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"d_getnbyname"
From d_getnbynm.U:
This variable conditionally defines the "HAS_GETNETBY-
NAME" 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_getnetbyaddr_r"
From d_getnetbyaddr_r.U:
This variable conditionally defines the "HAS_GETNET-
BYADDR_R" symbol, which indicates to the C program
that the getnetbyaddr_r() routine is available.
"d_getnetbyname_r"
From d_getnetbyname_r.U:
This variable conditionally defines the "HAS_GETNETBY-
NAME_R" symbol, which indicates to the C program that
the getnetbyname_r() routine is available.
"d_getnetent_r"
From d_getnetent_r.U:
This variable conditionally defines the "HAS_GETNE-
TENT_R" symbol, which indicates to the C program that
the getnetent_r() routine is available.
"d_getnetprotos"
From d_getnetprotos.U:
This variable conditionally defines the "HAS_GET-
NET_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:
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Config(3p) Perl Programmers Reference Guide Config(3p)
This variable conditionally defines the "HAS_GETPROTO-
BYNAME" 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_GETPROTO-
BYNUMBER" 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 pro-
cess "ID".
"d_getprior"
From d_getprior.U:
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Config(3p) Perl Programmers Reference Guide Config(3p)
This variable conditionally defines "HAS_GETPRIORITY"
if getpriority() is available to get a process's pri-
ority.
"d_getprotobyname_r"
From d_getprotobyname_r.U:
This variable conditionally defines the "HAS_GETPROTO-
BYNAME_R" symbol, which indicates to the C program
that the getprotobyname_r() routine is available.
"d_getprotobynumber_r"
From d_getprotobynumber_r.U:
This variable conditionally defines the "HAS_GETPROTO-
BYNUMBER_R" symbol, which indicates to the C program
that the getprotobynumber_r() routine is available.
"d_getprotoent_r"
From d_getprotoent_r.U:
This variable conditionally defines the "HAS_GETPRO-
TOENT_R" symbol, which indicates to the C program that
the getprotoent_r() routine is available.
"d_getprotoprotos"
From d_getprotoprotos.U:
This variable conditionally defines the "HAS_GET-
PROTO_PROTOS" symbol, which indicates to the C program
that <netdb.h> supplies prototypes for the various
getproto*() functions. See also netdbtype.U for prob-
ing 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 get-
pwent() routine is available for sequential access of
the passwd database.
"d_getpwent_r"
From d_getpwent_r.U:
This variable conditionally defines the "HAS_GETP-
WENT_R" symbol, which indicates to the C program that
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Config(3p) Perl Programmers Reference Guide Config(3p)
the getpwent_r() routine is available.
"d_getpwnam_r"
From d_getpwnam_r.U:
This variable conditionally defines the "HAS_GETPW-
NAM_R" symbol, which indicates to the C program that
the getpwnam_r() routine is available.
"d_getpwuid_r"
From d_getpwuid_r.U:
This variable conditionally defines the "HAS_GETP-
WUID_R" symbol, which indicates to the C program that
the getpwuid_r() routine is available.
"d_getsbyname"
From d_getsrvby.U:
This variable conditionally defines the "HAS_GET-
SERVBYNAME" 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_GET-
SERVBYPORT" 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 ser-
vices in some data base or another.
"d_getservbyname_r"
From d_getservbyname_r.U:
This variable conditionally defines the "HAS_GET-
SERVBYNAME_R" symbol, which indicates to the C program
that the getservbyname_r() routine is available.
"d_getservbyport_r"
From d_getservbyport_r.U:
This variable conditionally defines the "HAS_GET-
SERVBYPORT_R" symbol, which indicates to the C program
that the getservbyport_r() routine is available.
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"d_getservent_r"
From d_getservent_r.U:
This variable conditionally defines the "HAS_GETSER-
VENT_R" symbol, which indicates to the C program that
the getservent_r() routine is available.
"d_getservprotos"
From d_getservprotos.U:
This variable conditionally defines the "HAS_GET-
SERV_PROTOS" symbol, which indicates to the C program
that <netdb.h> supplies prototypes for the various
getserv*() functions. See also netdbtype.U for prob-
ing for various netdb types.
"d_getspnam"
From d_getspnam.U:
This variable conditionally defines "HAS_GETSPNAM" if
getspnam() is available to retrieve SysV shadow pass-
word entries by name.
"d_getspnam_r"
From d_getspnam_r.U:
This variable conditionally defines the "HAS_GETSP-
NAM_R" symbol, which indicates to the C program that
the getspnam_r() routine is available.
"d_gettimeod"
From d_ftime.U:
This variable conditionally defines the "HAS_GETTIME-
OFDAY" symbol, which indicates that the gettimeofday()
system call exists (to obtain a sub-second accuracy
clock). You should probably include <sys/resource.h>.
"d_gmtime_r"
From d_gmtime_r.U:
This variable conditionally defines the "HAS_GMTIME_R"
symbol, which indicates to the C program that the
gmtime_r() routine is available.
"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
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Config(3p) Perl Programmers Reference Guide Config(3p)
indicates that struct group in <grp.h> contains
gr_passwd.
"d_hasmntopt"
From d_hasmntopt.U:
This variable conditionally defines the "HAS_HASMN-
TOPT" 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_ilogbl"
From d_ilogbl.U:
This variable conditionally defines the "HAS_ILOGBL"
symbol, which indicates to the C program that the
ilogbl() routine is available. If scalbnl is also
present we can emulate frexpl.
"d_index"
From d_strchr.U:
This variable conditionally defines "HAS_INDEX" if
index() and rindex() are available for string search-
ing.
"d_inetaton"
From d_inetaton.U:
This variable conditionally defines the
"HAS_INET_ATON" symbol, which indicates to the C pro-
gram 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 isas-
cii() is available.
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"d_isfinite"
From d_isfinite.U:
This variable conditionally defines the "HAS_ISFINITE"
symbol, which indicates to the C program that the
isfinite() routine is available.
"d_isinf"
From d_isinf.U:
This variable conditionally defines the "HAS_ISINF"
symbol, which indicates to the C program that the
isinf() routine 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 preci-
sion number.
"d_link"
From d_link.U:
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Config(3p) Perl Programmers Reference Guide Config(3p)
This variable conditionally defines "HAS_LINK" if
link() is available to create hard links.
"d_localtime_r"
From d_localtime_r.U:
This variable conditionally defines the "HAS_LOCAL-
TIME_R" symbol, which indicates to the C program that
the localtime_r() routine is available.
"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:
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Config(3p) Perl Programmers Reference Guide Config(3p)
This variable conditionally defines "HAS_MADVISE" if
madvise() is available to map a file into memory.
"d_malloc_size"
From d_malloc_size.U:
This symbol, if defined, indicates that the mal-
loc_size routine is available for use.
"d_malloc_good_size"
From d_malloc_good_size.U:
This symbol, if defined, indicates that the mal-
loc_good_size routine is available for use.
"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 mem-
chr() 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 mem-
cmp() routine is available to compare blocks of mem-
ory.
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"d_memcpy"
From d_memcpy.U:
This variable conditionally defines the "HAS_MEMCPY"
symbol, which indicates to the C program that the mem-
cpy() 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 mem-
move() 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 mem-
set() 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:
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Config(3p) Perl Programmers Reference Guide Config(3p)
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_modfl_pow32_bug"
From d_modfl.U:
This variable conditionally defines the
HAS_MODFL_POW32_BUG symbol, which indicates that
modfl() is broken for long doubles >= pow(2, 32). For
example from 4294967303.150000 one would get
4294967302.000000 and 1.150000. The bug has been seen
in certain versions of glibc, release 2.2.2 is known
to be okay.
"d_modflproto"
From d_modfl.U:
This symbol, if defined, indicates that the system
provides a prototype for the modfl() function. Other-
wise, it is up to the program to supply one. C99 says
it should be long double modfl(long double, long dou-
ble *);
"d_mprotect"
From d_mprotect.U:
This variable conditionally defines "HAS_MPROTECT" if
mprotect() is available to modify the access protec-
tion of a memory mapped file.
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"d_msg"
From d_msg.U:
This variable conditionally defines the "HAS_MSG" sym-
bol, 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_DON-
TROUTE" symbol, which indicates that the "MSG_DON-
TROUTE" 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 avail-
able. #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 avail-
able. #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
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Config(3p) Perl Programmers Reference Guide Config(3p)
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_msghdr_s"
From d_msghdr_s.U:
This variable conditionally defines the
"HAS_STRUCT_MSGHDR" symbol, which indicates that the
struct msghdr is supported.
"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_nanosleep"
From d_nanosleep.U:
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Config(3p) Perl Programmers Reference Guide Config(3p)
This variable conditionally defines "HAS_NANOSLEEP" if
nanosleep() is available to sleep with 1E-9 sec accu-
racy.
"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_nl_langinfo"
From d_nl_langinfo.U:
This variable conditionally defines the "HAS_NL_LANG-
INFO" symbol, which indicates to the C program that
the nl_langinfo() 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_zero_is_allbits_zero"
From perlxv.U:
This variable indicates whether a variable of type
nvtype stores 0.0 in memory as all bits zero.
"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_cre-
ate_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.
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Config(3p) Perl Programmers Reference Guide Config(3p)
"d_oldsock"
From d_socket.U:
This variable conditionally defines the "OLDSOCKET"
symbol, which indicates that the "BSD" socket inter-
face is based on 4.1c and not 4.2.
"d_open3"
From d_open3.U:
This variable conditionally defines the HAS_OPEN3 man-
ifest 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-sys-
tem 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_OTHERLIB-
DIRS", 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_PHOST-
NAME" 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
perl v5.8.8 2002-10-27 44
Config(3p) Perl Programmers Reference Guide Config(3p)
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 sepa-
rate this from d_PRIeldbl so that even case-blind sys-
tems 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
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Config(3p) Perl Programmers Reference Guide Config(3p)
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 sepa-
rate this from d_PRIgldbl so that even case-blind sys-
tems 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-
perl v5.8.8 2002-10-27 46
Config(3p) Perl Programmers Reference Guide Config(3p)
blind systems can see the difference.
"d_procselfexe"
From d_procselfexe.U:
Defined if $procselfexe is symlink to the absolute
pathname of the executing program.
"d_pthread_atfork"
From d_pthread_atfork.U:
This variable conditionally defines the
"HAS_PTHREAD_ATFORK" symbol, which indicates to the C
program that the pthread_atfork() routine is avail-
able.
"d_pthread_attr_setscope"
From d_pthread_attr_ss.U:
This variable conditionally defines
"HAS_PTHREAD_ATTR_SETSCOPE" if pthread_attr_setscope()
is available to set the contention scope attribute of
a thread attribute object.
"d_pthread_yield"
From d_pthread_y.U:
This variable conditionally defines the
"HAS_PTHREAD_YIELD" symbol if the pthread_yield rou-
tine is available to yield the execution of the cur-
rent 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
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Config(3p) Perl Programmers Reference Guide Config(3p)
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_random_r"
From d_random_r.U:
This variable conditionally defines the "HAS_RANDOM_R"
symbol, which indicates to the C program that the ran-
dom_r() routine is available.
"d_readdir64_r"
From d_readdir64_r.U:
This variable conditionally defines the HAS_READ-
DIR64_R symbol, which indicates to the C program that
the readdir64_r() routine is available.
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Config(3p) Perl Programmers Reference Guide Config(3p)
"d_readdir"
From d_readdir.U:
This variable conditionally defines "HAS_READDIR" if
readdir() is available to read directory entries.
"d_readdir_r"
From d_readdir_r.U:
This variable conditionally defines the "HAS_READ-
DIR_R" symbol, which indicates to the C program that
the readdir_r() routine is available.
"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_readv"
From d_readv.U:
This variable conditionally defines the "HAS_READV"
symbol, which indicates to the C program that the
readv() routine is available.
"d_recvmsg"
From d_recvmsg.U:
This variable conditionally defines the "HAS_RECVMSG"
symbol, which indicates to the C program that the
recvmsg() routine is available.
"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.
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"d_safebcpy"
From d_safebcpy.U:
This variable conditionally defines the
"HAS_SAFE_BCOPY" symbol if the bcopy() routine can do
overlapping copies. Normally, you should probably use
memmove().
"d_safemcpy"
From d_safemcpy.U:
This variable conditionally defines the "HAS_SAFE_MEM-
CPY" symbol if the memcpy() routine can do overlapping
copies. For overlapping copies, memmove() should be
used, if available.
"d_sanemcmp"
From d_sanemcmp.U:
This variable conditionally defines the "HAS_SANE_MEM-
CMP" 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 pro-
gram that the system provides a prototype for the
sbrk() function. Otherwise, it is up to the program
to supply one.
"d_scalbnl"
From d_scalbnl.U:
This variable conditionally defines the "HAS_SCALBNL"
symbol, which indicates to the C program that the
scalbnl() routine is available. If ilogbl is also
present we can emulate frexpl.
"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
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Config(3p) Perl Programmers Reference Guide Config(3p)
"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 descrip-
tors. 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" sym-
bol, 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 sem-
ctl() routine is available.
"d_semctl_semid_ds"
From d_union_semun.U:
This variable conditionally defines "USE_SEM-
CTL_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_SEM-
CTL_SEMUN", which indicates that union semun is to be
used for semctl "IPC_STAT".
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"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_sendmsg"
From d_sendmsg.U:
This variable conditionally defines the "HAS_SENDMSG"
symbol, which indicates to the C program that the
sendmsg() 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 set-
grent() routine is available for initializing sequen-
tial access to the group database.
"d_setgrent_r"
From d_setgrent_r.U:
This variable conditionally defines the "HAS_SET-
GRENT_R" symbol, which indicates to the C program that
the setgrent_r() routine is available.
"d_setgrps"
From d_setgrps.U:
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This variable conditionally defines the "HAS_SET-
GROUPS" 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_sethostent_r"
From d_sethostent_r.U:
This variable conditionally defines the "HAS_SETHOS-
TENT_R" symbol, which indicates to the C program that
the sethostent_r() routine is available.
"d_setitimer"
From d_setitimer.U:
This variable conditionally defines the
"HAS_SETITIMER" symbol, which indicates to the C pro-
gram that the setitimer() routine is available.
"d_setlinebuf"
From d_setlnbuf.U:
This variable conditionally defines the "HAS_SET-
LINEBUF" 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_setlocale_r"
From d_setlocale_r.U:
This variable conditionally defines the "HAS_SETLO-
CALE_R" symbol, which indicates to the C program that
the setlocale_r() routine is available.
"d_setnent"
From d_setnent.U:
This variable conditionally defines "HAS_SETNETENT" if
setnetent() is available.
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"d_setnetent_r"
From d_setnetent_r.U:
This variable conditionally defines the "HAS_SETNE-
TENT_R" symbol, which indicates to the C program that
the setnetent_r() routine 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 pri-
ority.
"d_setproctitle"
From d_setproctitle.U:
This variable conditionally defines the "HAS_SETPROC-
TITLE" symbol, which indicates to the C program that
the setproctitle() routine is available.
"d_setprotoent_r"
From d_setprotoent_r.U:
This variable conditionally defines the "HAS_SETPRO-
TOENT_R" symbol, which indicates to the C program that
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Config(3p) Perl Programmers Reference Guide Config(3p)
the setprotoent_r() 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 set-
pwent() routine is available for initializing sequen-
tial access to the passwd database.
"d_setpwent_r"
From d_setpwent_r.U:
This variable conditionally defines the "HAS_SETP-
WENT_R" symbol, which indicates to the C program that
the setpwent_r() routine is available.
"d_setregid"
From d_setregid.U:
This variable conditionally defines "HAS_SETREGID" if
setregid() is available to change the real and effec-
tive 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 effec-
tive 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.
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"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_setservent_r"
From d_setservent_r.U:
This variable conditionally defines the "HAS_SETSER-
VENT_R" symbol, which indicates to the C program that
the setservent_r() routine 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" sym-
bol, 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
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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 shm-
ctl() 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_SIGAC-
TION" 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_sockatmark"
From d_sockatmark.U:
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Config(3p) Perl Programmers Reference Guide Config(3p)
This variable conditionally defines the "HAS_SOCKAT-
MARK" symbol, which indicates to the C program that
the sockatmark() routine is available.
"d_sockatmarkproto"
From d_sockatmarkproto.U:
This variable conditionally defines the "HAS_SOCKAT-
MARK_PROTO" symbol, which indicates to the C program
that the system provides a prototype for the sockat-
mark() function. Otherwise, it is up to the program
to supply one.
"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_SOCKET-
PAIR" symbol, which indicates that the "BSD" socket-
pair() is supported.
"d_socks5_init"
From d_socks5_init.U:
This variable conditionally defines the
HAS_SOCKS5_INIT symbol, which indicates to the C pro-
gram that the socks5_init() routine is available.
"d_sprintf_returns_strlen"
From d_sprintf_returns_strlen.U:
This variable defines whether sprintf returns the
length of the string (as per the "ANSI" spec). Some C
libraries retain compatibility with pre-"ANSI" C and
return a pointer to the passed in buffer; for these
this variable will be undef.
"d_sqrtl"
From d_sqrtl.U:
This variable conditionally defines the "HAS_SQRTL"
symbol, which indicates to the C program that the
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sqrtl() routine is available.
"d_srand48_r"
From d_srand48_r.U:
This variable conditionally defines the HAS_SRAND48_R
symbol, which indicates to the C program that the
srand48_r() routine is available.
"d_srandom_r"
From d_srandom_r.U:
This variable conditionally defines the "HAS_SRAN-
DOM_R" symbol, which indicates to the C program that
the srandom_r() routine is available.
"d_sresgproto"
From d_sresgproto.U:
This variable conditionally defines the "HAS_SETRES-
GID_PROTO" symbol, which indicates to the C program
that the system provides a prototype for the setres-
gid() function. Otherwise, it is up to the program to
supply one.
"d_sresuproto"
From d_sresuproto.U:
This variable conditionally defines the "HAS_SETRE-
SUID_PROTO" symbol, which indicates to the C program
that the system provides a prototype for the setre-
suid() function. Otherwise, it is up to the program
to supply one.
"d_statblks"
From d_statblks.U:
This variable conditionally defines "USE_STAT_BLOCKS"
if this system has a stat structure declaring st_blk-
size 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
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"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
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Config(3p) Perl Programmers Reference Guide Config(3p)
_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 col-
lating 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 struc-
tures.
"d_strerrm"
From d_strerror.U:
This variable holds what Strerrr is defined as to
translate an error code condition into an error mes-
sage string. It could be "strerror" or a more "com-
plex" 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_strerror_r"
From d_strerror_r.U:
This variable conditionally defines the "HAS_STR-
ERROR_R" symbol, which indicates to the C program that
the strerror_r() routine is available.
"d_strftime"
From d_strftime.U:
This variable conditionally defines the "HAS_STRFTIME"
symbol, which indicates to the C program that the
strftime() routine is available.
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"d_strlcat"
From d_strlcat.U:
This variable conditionally defines the "HAS_STRLCAT"
symbol, which indicates to the C program that the
strlcat () routine is available.
"d_strlcpy"
From d_strlcpy.U:
This variable conditionally defines the "HAS_STRLCPY"
symbol, which indicates to the C program that the
strlcpy () routine is available.
"d_strtod"
From d_strtod.U:
This variable conditionally defines the "HAS_STRTOD"
symbol, which indicates to the C program that the str-
tod() 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 str-
tol() 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 str-
told() 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 str-
toll() routine is available.
"d_strtoq"
From d_strtoq.U:
This variable conditionally defines the "HAS_STRTOQ"
symbol, which indi |
