# This file is part of Autoconf. -*- Autoconf -*- # Macros that test for specific, unclassified, features. # # Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, # 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. # # 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 2, 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. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA # 02110-1301, USA. # # As a special exception, the Free Software Foundation gives unlimited # permission to copy, distribute and modify the configure scripts that # are the output of Autoconf. You need not follow the terms of the GNU # General Public License when using or distributing such scripts, even # though portions of the text of Autoconf appear in them. The GNU # General Public License (GPL) does govern all other use of the material # that constitutes the Autoconf program. # # Certain portions of the Autoconf source text are designed to be copied # (in certain cases, depending on the input) into the output of # Autoconf. We call these the "data" portions. The rest of the Autoconf # source text consists of comments plus executable code that decides which # of the data portions to output in any given case. We call these # comments and executable code the "non-data" portions. Autoconf never # copies any of the non-data portions into its output. # # This special exception to the GPL applies to versions of Autoconf # released by the Free Software Foundation. When you make and # distribute a modified version of Autoconf, you may extend this special # exception to the GPL to apply to your modified version as well, *unless* # your modified version has the potential to copy into its output some # of the text that was the non-data portion of the version that you started # with. (In other words, unless your change moves or copies text from # the non-data portions to the data portions.) If your modification has # such potential, you must delete any notice of this special exception # to the GPL from your modified version. # # 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 /* NetBSD declares sys_siglist in unistd.h. */ #ifdef HAVE_UNISTD_H # include #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 /* 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], [$4]);; esac rm -f conftest*[]dnl ])# _AC_SYS_LARGEFILE_MACRO_VALUE # AC_SYS_LARGEFILE # ---------------- # By default, many hosts won't let programs access large files; # one must use special compiler options to get large-file access to work. # For more details about this brain damage please see: # http://www.unix-systems.org/version2/whatsnew/lfs20mar.html AC_DEFUN([AC_SYS_LARGEFILE], [AC_ARG_ENABLE(largefile, [ --disable-largefile omit support for large files]) if test "$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 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 . 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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'. 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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. AC_DEFUN([AC_USE_SYSTEM_EXTENSIONS], [ AC_BEFORE([$0], [AC_COMPILE_IFELSE]) AC_BEFORE([$0], [AC_RUN_IFELSE]) AC_REQUIRE([AC_GNU_SOURCE]) AC_REQUIRE([AC_AIX]) AC_REQUIRE([AC_MINIX]) AH_VERBATIM([__EXTENSIONS__], [/* Enable extensions on Solaris. */ #ifndef __EXTENSIONS__ # undef __EXTENSIONS__ #endif #ifndef _POSIX_PTHREAD_SEMANTICS # undef _POSIX_PTHREAD_SEMANTICS #endif #ifndef _TANDEM_SOURCE # undef _TANDEM_SOURCE #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([_POSIX_PTHREAD_SEMANTICS]) AC_DEFINE([_TANDEM_SOURCE]) ]) ## -------------------------- ## ## 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 # ------ AC_DEFUN([AC_AIX], [AH_VERBATIM([_ALL_SOURCE], [/* Define to 1 if on AIX 3. 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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])