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Diffstat (limited to 'lib/autoconf/specific.m4')
| -rw-r--r-- | lib/autoconf/specific.m4 | 481 |
1 files changed, 481 insertions, 0 deletions
diff --git a/lib/autoconf/specific.m4 b/lib/autoconf/specific.m4 new file mode 100644 index 0000000..7d6be57 --- /dev/null +++ b/lib/autoconf/specific.m4 @@ -0,0 +1,481 @@ +# This file is part of Autoconf. -*- Autoconf -*- +# Macros that test for specific, unclassified, features. +# +# Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc. + +# This file is part of Autoconf. This program is free +# software; you can redistribute it and/or modify it under the +# terms of the GNU General Public License as published by the +# Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# Under Section 7 of GPL version 3, you are granted additional +# permissions described in the Autoconf Configure Script Exception, +# version 3.0, as published by the Free Software Foundation. +# +# You should have received a copy of the GNU General Public License +# and a copy of the Autoconf Configure Script Exception along with +# this program; see the files COPYINGv3 and COPYING.EXCEPTION +# respectively. If not, see <http://www.gnu.org/licenses/>. + +# Written by David MacKenzie, with help from +# Franc,ois Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor, +# Roland McGrath, Noah Friedman, david d zuhn, and many others. + + +## ------------------------- ## +## Checks for declarations. ## +## ------------------------- ## + + +# AC_DECL_SYS_SIGLIST +# ------------------- +AN_IDENTIFIER([sys_siglist], [AC_CHECK_DECLS([sys_siglist])]) +AU_DEFUN([AC_DECL_SYS_SIGLIST], +[AC_CHECK_DECLS([sys_siglist],,, +[#include <signal.h> +/* NetBSD declares sys_siglist in unistd.h. */ +#ifdef HAVE_UNISTD_H +# include <unistd.h> +#endif +]) +])# AC_DECL_SYS_SIGLIST + + + + +## -------------------------------------- ## +## Checks for operating system services. ## +## -------------------------------------- ## + + +# AC_SYS_INTERPRETER +# ------------------ +AC_DEFUN([AC_SYS_INTERPRETER], +[AC_CACHE_CHECK(whether @%:@! works in shell scripts, ac_cv_sys_interpreter, +[echo '#! /bin/cat +exit 69 +' >conftest +chmod u+x conftest +(SHELL=/bin/sh; export SHELL; ./conftest >/dev/null 2>&1) +if test $? -ne 69; then + ac_cv_sys_interpreter=yes +else + ac_cv_sys_interpreter=no +fi +rm -f conftest]) +interpval=$ac_cv_sys_interpreter +]) + + +AU_DEFUN([AC_HAVE_POUNDBANG], +[AC_SYS_INTERPRETER], +[Remove this warning when you adjust your code to use +`AC_SYS_INTERPRETER'.]) + + +AU_DEFUN([AC_ARG_ARRAY], [], +[$0 is no longer implemented: don't do unportable things +with arguments. Remove this warning when you adjust your code.]) + + +# _AC_SYS_LARGEFILE_TEST_INCLUDES +# ------------------------------- +m4_define([_AC_SYS_LARGEFILE_TEST_INCLUDES], +[@%:@include <sys/types.h> + /* Check that off_t can represent 2**63 - 1 correctly. + We can't simply define LARGE_OFF_T to be 9223372036854775807, + since some C++ compilers masquerading as C compilers + incorrectly reject 9223372036854775807. */ +@%:@define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62)) + int off_t_is_large[[(LARGE_OFF_T % 2147483629 == 721 + && LARGE_OFF_T % 2147483647 == 1) + ? 1 : -1]];[]dnl +]) + + +# _AC_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE, +# CACHE-VAR, +# DESCRIPTION, +# PROLOGUE, [FUNCTION-BODY]) +# -------------------------------------------------------- +m4_define([_AC_SYS_LARGEFILE_MACRO_VALUE], +[AC_CACHE_CHECK([for $1 value needed for large files], [$3], +[while :; do + m4_ifval([$6], [AC_LINK_IFELSE], [AC_COMPILE_IFELSE])( + [AC_LANG_PROGRAM([$5], [$6])], + [$3=no; break]) + m4_ifval([$6], [AC_LINK_IFELSE], [AC_COMPILE_IFELSE])( + [AC_LANG_PROGRAM([@%:@define $1 $2 +$5], [$6])], + [$3=$2; break]) + $3=unknown + break +done]) +case $$3 in #( + no | unknown) ;; + *) AC_DEFINE_UNQUOTED([$1], [$$3], [$4]);; +esac +rm -rf conftest*[]dnl +])# _AC_SYS_LARGEFILE_MACRO_VALUE + + +# AC_SYS_LARGEFILE +# ---------------- +# By default, many hosts won't let programs access large files; +# one must use special compiler options to get large-file access to work. +# For more details about this brain damage please see: +# http://www.unix-systems.org/version2/whatsnew/lfs20mar.html +AC_DEFUN([AC_SYS_LARGEFILE], +[AC_ARG_ENABLE(largefile, + [ --disable-largefile omit support for large files]) +if test "$enable_largefile" != no; then + + AC_CACHE_CHECK([for special C compiler options needed for large files], + ac_cv_sys_largefile_CC, + [ac_cv_sys_largefile_CC=no + if test "$GCC" != yes; then + ac_save_CC=$CC + while :; do + # IRIX 6.2 and later do not support large files by default, + # so use the C compiler's -n32 option if that helps. + AC_LANG_CONFTEST([AC_LANG_PROGRAM([_AC_SYS_LARGEFILE_TEST_INCLUDES])]) + AC_COMPILE_IFELSE([], [break]) + CC="$CC -n32" + AC_COMPILE_IFELSE([], [ac_cv_sys_largefile_CC=' -n32'; break]) + break + done + CC=$ac_save_CC + rm -f conftest.$ac_ext + fi]) + if test "$ac_cv_sys_largefile_CC" != no; then + CC=$CC$ac_cv_sys_largefile_CC + fi + + _AC_SYS_LARGEFILE_MACRO_VALUE(_FILE_OFFSET_BITS, 64, + ac_cv_sys_file_offset_bits, + [Number of bits in a file offset, on hosts where this is settable.], + [_AC_SYS_LARGEFILE_TEST_INCLUDES]) + if test $ac_cv_sys_file_offset_bits = unknown; then + _AC_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1, + ac_cv_sys_large_files, + [Define for large files, on AIX-style hosts.], + [_AC_SYS_LARGEFILE_TEST_INCLUDES]) + fi + + AH_VERBATIM([_DARWIN_USE_64_BIT_INODE], +[/* Enable large inode numbers on Mac OS X 10.5. */ +#ifndef _DARWIN_USE_64_BIT_INODE +# define _DARWIN_USE_64_BIT_INODE 1 +#endif]) +fi +])# AC_SYS_LARGEFILE + + +# AC_SYS_LONG_FILE_NAMES +# ---------------------- +# Security: use a temporary directory as the most portable way of +# creating files in /tmp securely. Removing them leaves a race +# condition, set -C is not portably guaranteed to use O_EXCL, so still +# leaves a race, and not all systems have the `mktemp' utility. We +# still test for existence first in case of broken systems where the +# mkdir succeeds even when the directory exists. Broken systems may +# retain a race, but they probably have other security problems +# anyway; this should be secure on well-behaved systems. In any case, +# use of `mktemp' is probably inappropriate here since it would fail in +# attempting to create different file names differing after the 14th +# character on file systems without long file names. +AC_DEFUN([AC_SYS_LONG_FILE_NAMES], +[AC_CACHE_CHECK(for long file names, ac_cv_sys_long_file_names, +[ac_cv_sys_long_file_names=yes +# Test for long file names in all the places we know might matter: +# . the current directory, where building will happen +# $prefix/lib where we will be installing things +# $exec_prefix/lib likewise +# $TMPDIR if set, where it might want to write temporary files +# /tmp where it might want to write temporary files +# /var/tmp likewise +# /usr/tmp likewise +for ac_dir in . "$TMPDIR" /tmp /var/tmp /usr/tmp "$prefix/lib" "$exec_prefix/lib"; do + # Skip $TMPDIR if it is empty or bogus, and skip $exec_prefix/lib + # in the usual case where exec_prefix is '${prefix}'. + case $ac_dir in #( + . | /* | ?:[[\\/]]*) ;; #( + *) continue;; + esac + test -w "$ac_dir/." || continue # It is less confusing to not echo anything here. + ac_xdir=$ac_dir/cf$$ + (umask 077 && mkdir "$ac_xdir" 2>/dev/null) || continue + ac_tf1=$ac_xdir/conftest9012345 + ac_tf2=$ac_xdir/conftest9012346 + touch "$ac_tf1" 2>/dev/null && test -f "$ac_tf1" && test ! -f "$ac_tf2" || + ac_cv_sys_long_file_names=no + rm -f -r "$ac_xdir" 2>/dev/null + test $ac_cv_sys_long_file_names = no && break +done]) +if test $ac_cv_sys_long_file_names = yes; then + AC_DEFINE(HAVE_LONG_FILE_NAMES, 1, + [Define to 1 if you support file names longer than 14 characters.]) +fi +]) + + +# AC_SYS_RESTARTABLE_SYSCALLS +# --------------------------- +# If the system automatically restarts a system call that is +# interrupted by a signal, define `HAVE_RESTARTABLE_SYSCALLS'. +AC_DEFUN([AC_SYS_RESTARTABLE_SYSCALLS], +[AC_DIAGNOSE([obsolete], +[$0: AC_SYS_RESTARTABLE_SYSCALLS is useful only when supporting very +old systems that lack `sigaction' and `SA_RESTART'. Don't bother with +this macro unless you need to support very old systems like 4.2BSD and +SVR3.])dnl +AC_REQUIRE([AC_HEADER_SYS_WAIT])dnl +AC_CACHE_CHECK(for restartable system calls, ac_cv_sys_restartable_syscalls, +[AC_RUN_IFELSE([AC_LANG_SOURCE( +[/* Exit 0 (true) if wait returns something other than -1, + i.e. the pid of the child, which means that wait was restarted + after getting the signal. */ + +AC_INCLUDES_DEFAULT +#include <signal.h> +#ifdef HAVE_SYS_WAIT_H +# include <sys/wait.h> +#endif + +/* Some platforms explicitly require an extern "C" signal handler + when using C++. */ +#ifdef __cplusplus +extern "C" void ucatch (int dummy) { } +#else +void ucatch (dummy) int dummy; { } +#endif + +int +main () +{ + int i = fork (), status; + + if (i == 0) + { + sleep (3); + kill (getppid (), SIGINT); + sleep (3); + return 0; + } + + signal (SIGINT, ucatch); + + status = wait (&i); + if (status == -1) + wait (&i); + + return status == -1; +}])], + [ac_cv_sys_restartable_syscalls=yes], + [ac_cv_sys_restartable_syscalls=no])]) +if test $ac_cv_sys_restartable_syscalls = yes; then + AC_DEFINE(HAVE_RESTARTABLE_SYSCALLS, 1, + [Define to 1 if system calls automatically restart after + interruption by a signal.]) +fi +])# AC_SYS_RESTARTABLE_SYSCALLS + + +# AC_SYS_POSIX_TERMIOS +# -------------------- +AC_DEFUN([AC_SYS_POSIX_TERMIOS], +[AC_CACHE_CHECK([POSIX termios], ac_cv_sys_posix_termios, +[AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h> +#include <unistd.h> +#include <termios.h> +]], + [/* SunOS 4.0.3 has termios.h but not the library calls. */ + tcgetattr(0, 0);])], + ac_cv_sys_posix_termios=yes, + ac_cv_sys_posix_termios=no)]) +])# AC_SYS_POSIX_TERMIOS + + + + +## ------------------------------------ ## +## Checks for not-quite-Unix variants. ## +## ------------------------------------ ## + + +# AC_GNU_SOURCE +# ------------- +AU_DEFUN([AC_GNU_SOURCE], [AC_USE_SYSTEM_EXTENSIONS]) + + +# AC_CYGWIN +# --------- +# Check for Cygwin. This is a way to set the right value for +# EXEEXT. +AU_DEFUN([AC_CYGWIN], +[AC_CANONICAL_HOST +case $host_os in + *cygwin* ) CYGWIN=yes;; + * ) CYGWIN=no;; +esac +], [$0 is obsolete: use AC_CANONICAL_HOST and check if $host_os +matches *cygwin*])# AC_CYGWIN + + +# AC_EMXOS2 +# --------- +# Check for EMX on OS/2. This is another way to set the right value +# for EXEEXT. +AU_DEFUN([AC_EMXOS2], +[AC_CANONICAL_HOST +case $host_os in + *emx* ) EMXOS2=yes;; + * ) EMXOS2=no;; +esac +], [$0 is obsolete: use AC_CANONICAL_HOST and check if $host_os +matches *emx*])# AC_EMXOS2 + + +# AC_MINGW32 +# ---------- +# Check for mingw32. This is another way to set the right value for +# EXEEXT. +AU_DEFUN([AC_MINGW32], +[AC_CANONICAL_HOST +case $host_os in + *mingw32* ) MINGW32=yes;; + * ) MINGW32=no;; +esac +], [$0 is obsolete: use AC_CANONICAL_HOST and check if $host_os +matches *mingw32*])# AC_MINGW32 + + +# AC_USE_SYSTEM_EXTENSIONS +# ------------------------ +# Enable extensions on systems that normally disable them, +# typically due to standards-conformance issues. +# +# Remember that #undef in AH_VERBATIM gets replaced with #define by +# AC_DEFINE. The goal here is to define all known feature-enabling +# macros, then, if reports of conflicts are made, disable macros that +# cause problems on some platforms (such as __EXTENSIONS__). +AC_DEFUN_ONCE([AC_USE_SYSTEM_EXTENSIONS], +[AC_BEFORE([$0], [AC_COMPILE_IFELSE])dnl +AC_BEFORE([$0], [AC_RUN_IFELSE])dnl + + AC_CHECK_HEADER([minix/config.h], [MINIX=yes], [MINIX=]) + if test "$MINIX" = yes; then + AC_DEFINE([_POSIX_SOURCE], [1], + [Define to 1 if you need to in order for `stat' and other + things to work.]) + AC_DEFINE([_POSIX_1_SOURCE], [2], + [Define to 2 if the system does not provide POSIX.1 features + except with this defined.]) + AC_DEFINE([_MINIX], [1], + [Define to 1 if on MINIX.]) + fi + +dnl Use a different key than __EXTENSIONS__, as that name broke existing +dnl configure.ac when using autoheader 2.62. + AH_VERBATIM([USE_SYSTEM_EXTENSIONS], +[/* Enable extensions on AIX 3, Interix. */ +#ifndef _ALL_SOURCE +# undef _ALL_SOURCE +#endif +/* Enable GNU extensions on systems that have them. */ +#ifndef _GNU_SOURCE +# undef _GNU_SOURCE +#endif +/* Enable threading extensions on Solaris. */ +#ifndef _POSIX_PTHREAD_SEMANTICS +# undef _POSIX_PTHREAD_SEMANTICS +#endif +/* Enable extensions on HP NonStop. */ +#ifndef _TANDEM_SOURCE +# undef _TANDEM_SOURCE +#endif +/* Enable general extensions on Solaris. */ +#ifndef __EXTENSIONS__ +# undef __EXTENSIONS__ +#endif +]) + AC_CACHE_CHECK([whether it is safe to define __EXTENSIONS__], + [ac_cv_safe_to_define___extensions__], + [AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM([[ +# define __EXTENSIONS__ 1 + ]AC_INCLUDES_DEFAULT])], + [ac_cv_safe_to_define___extensions__=yes], + [ac_cv_safe_to_define___extensions__=no])]) + test $ac_cv_safe_to_define___extensions__ = yes && + AC_DEFINE([__EXTENSIONS__]) + AC_DEFINE([_ALL_SOURCE]) + AC_DEFINE([_GNU_SOURCE]) + AC_DEFINE([_POSIX_PTHREAD_SEMANTICS]) + AC_DEFINE([_TANDEM_SOURCE]) +])# AC_USE_SYSTEM_EXTENSIONS + + + +## -------------------------- ## +## Checks for UNIX variants. ## +## -------------------------- ## + + +# These are kludges which should be replaced by a single POSIX check. +# They aren't cached, to discourage their use. + +# AC_AIX +# ------ +AU_DEFUN([AC_AIX], [AC_USE_SYSTEM_EXTENSIONS]) + + +# AC_MINIX +# -------- +AU_DEFUN([AC_MINIX], [AC_USE_SYSTEM_EXTENSIONS]) + + +# AC_ISC_POSIX +# ------------ +AU_DEFUN([AC_ISC_POSIX], [AC_SEARCH_LIBS([strerror], [cposix])]) + + +# AC_XENIX_DIR +# ------------ +AU_DEFUN([AC_XENIX_DIR], +[AC_MSG_CHECKING([for Xenix]) +AC_EGREP_CPP([yes], +[#if defined M_XENIX && ! defined M_UNIX + yes +@%:@endif], + [AC_MSG_RESULT([yes]); XENIX=yes], + [AC_MSG_RESULT([no]); XENIX=]) + +AC_HEADER_DIRENT[]dnl +], +[You shouldn't need to depend upon XENIX. Remove the +`AC_MSG_CHECKING', `AC_EGREP_CPP', and this warning if this part +of the test is useless.]) + + +# AC_DYNIX_SEQ +# ------------ +AU_DEFUN([AC_DYNIX_SEQ], [AC_FUNC_GETMNTENT]) + + +# AC_IRIX_SUN +# ----------- +AU_DEFUN([AC_IRIX_SUN], +[AC_FUNC_GETMNTENT +AC_CHECK_LIB([sun], [getpwnam])]) + + +# AC_SCO_INTL +# ----------- +AU_DEFUN([AC_SCO_INTL], [AC_FUNC_STRFTIME]) |