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Diffstat (limited to 'm4/acinclude.m4')
| -rw-r--r-- | m4/acinclude.m4 | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/m4/acinclude.m4 b/m4/acinclude.m4 index f23fbb68d35..b608971969f 100644 --- a/m4/acinclude.m4 +++ b/m4/acinclude.m4 @@ -600,3 +600,171 @@ dnl mismatched parentheses. dnl checks for structures dnl checks for system services + + +dnl *********************** SPECIAL SECTION ******************************* +dnl +dnl This section contains my own *re*implementation of the functionality +dnl provided by some tests/macros found in GNU Autoconf since the ones found +dnl in Autoconf don't appear to work as expected. +dnl +dnl dnl -Ossama Othman <ossama@debian.org> +dnl dnl +dnl dnl The copyright for the following macros is listed below. +dnl dnl Note that all macros listed prior to this section are copyrighted +dnl dnl by Ossama Othman, not the Free Software Foundation. Nevertheless, +dnl dnl all software found in this file is free software. Please read the +dnl dnl distribution terms found at the top of this file and the ones below. + +dnl dnl Parameterized macros. +dnl dnl Requires GNU m4. +dnl dnl This file is part of Autoconf. +dnl dnl Copyright (C) 1992, 93, 94, 95, 96, 1998 Free Software Foundation, Inc. +dnl dnl +dnl dnl This program is free software; you can redistribute it and/or modify +dnl dnl it under the terms of the GNU General Public License as published by +dnl dnl the Free Software Foundation; either version 2, or (at your option) +dnl dnl any later version. +dnl dnl +dnl dnl This program is distributed in the hope that it will be useful, +dnl dnl but WITHOUT ANY WARRANTY; without even the implied warranty of +dnl dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +dnl dnl GNU General Public License for more details. +dnl dnl +dnl dnl You should have received a copy of the GNU General Public License +dnl dnl along with this program; if not, write to the Free Software +dnl dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA +dnl dnl 02111-1307, USA. +dnl dnl +dnl dnl As a special exception, the Free Software Foundation gives unlimited +dnl dnl permission to copy, distribute and modify the configure scripts that +dnl dnl are the output of Autoconf. You need not follow the terms of the GNU +dnl dnl General Public License when using or distributing such scripts, even +dnl dnl though portions of the text of Autoconf appear in them. The GNU +dnl dnl General Public License (GPL) does govern all other use of the material +dnl dnl that constitutes the Autoconf program. +dnl dnl +dnl dnl Certain portions of the Autoconf source text are designed to be copied +dnl dnl (in certain cases, depending on the input) into the output of +dnl dnl Autoconf. We call these the "data" portions. The rest of the Autoconf +dnl dnl source text consists of comments plus executable code that decides which +dnl dnl of the data portions to output in any given case. We call these +dnl dnl comments and executable code the "non-data" portions. Autoconf never +dnl dnl copies any of the non-data portions into its output. +dnl dnl +dnl dnl This special exception to the GPL applies to versions of Autoconf +dnl dnl released by the Free Software Foundation. When you make and +dnl dnl distribute a modified version of Autoconf, you may extend this special +dnl dnl exception to the GPL to apply to your modified version as well, *unless* +dnl dnl your modified version has the potential to copy into its output some +dnl dnl of the text that was the non-data portion of the version that you started +dnl dnl with. (In other words, unless your change moves or copies text from +dnl dnl the non-data portions to the data portions.) If your modification has +dnl dnl such potential, you must delete any notice of this special exception +dnl dnl to the GPL from your modified version. +dnl dnl +dnl dnl Written by David MacKenzie, with help from +dnl dnl Franc,ois Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor, +dnl dnl Roland McGrath, Noah Friedman, david d zuhn, and many others. + + +dnl dnl Usage: ACE_SEARCH_LIBS(FUNCTION, SEARCH-LIBS [, ACTION-IF-FOUND +dnl dnl [, ACTION-IF-NOT-FOUND [, OTHER-LIBRARIES]]]) +dnl dnl Search for a library defining FUNCTION, if it's not already available. +dnl AC_DEFUN([ACE_SEARCH_LIBS], +dnl [ +dnl AC_CACHE_CHECK([for library containing $1], [ac_cv_search_$1], +dnl [ +dnl ac_func_search_save_LIBS="$LIBS" + +dnl ac_cv_search_$1="no" + +dnl ACE_TRY_LINK_FUNC([$1], [ac_cv_search_$1="none required"]) + +dnl test "$ac_cv_search_$1" = "no" && for i in $2; do +dnl LIBS="-l$i $5 $ac_func_search_save_LIBS" +dnl ACE_TRY_LINK_FUNC([$1], +dnl [ +dnl ac_cv_search_$1="-l$i" +dnl break +dnl ]) +dnl done + +dnl LIBS="$ac_func_search_save_LIBS" +dnl ]) + +dnl if test "$ac_cv_search_$1" != "no"; then +dnl test "$ac_cv_search_$1" = "none required" || LIBS="$ac_cv_search_$1 $LIBS" +dnl $3 +dnl else : +dnl $4 +dnl fi +dnl ]) + +dnl dnl Usage: ACE_TRY_LINK_FUNC(FUNCTION,[, ACTION-IF-FOUND +dnl dnl [, ACTION-IF-NOT-FOUND]) +dnl dnl Search for a library defining FUNCTION, if it's not already available. +dnl AC_DEFUN([ACE_TRY_LINK_FUNC], +dnl [ +dnl AC_LINK_IFELSE([AC_LANG_PROGRAM([[dnl Don't include <ctype.h> because on OSF/1 3.0 it includes <sys/types.h> +dnl dnl which includes <sys/select.h> which contains a prototype for +dnl dnl select. Similarly for bzero. +dnl /* System header to define __stub macros and hopefully few prototypes, +dnl which can conflict with char $1(); below. */ +dnl #include <assert.h> +dnl /* Override any gcc2 internal prototype to avoid an error. */ +dnl ifelse(AC_LANG, C++, #ifdef __cplusplus +dnl extern "C" +dnl #endif +dnl )dnl +dnl /* We use char because int might match the return type of a gcc2 +dnl builtin and then its argument prototype would still apply. */ +dnl char $1(); +dnl ]], [[ +dnl /* The GNU C library defines this for functions which it implements +dnl to always fail with ENOSYS. Some functions are actually named +dnl something starting with __ and the normal name is an alias. */ +dnl #if defined (__stub_$1) || defined (__stub___$1) +dnl choke me +dnl #else +dnl $1(); +dnl #endif +dnl ]])],[$2],[$3]) +dnl ]) + +dnl AC_DEFUN([ACE_SYS_RESTARTABLE_SYSCALLS], +dnl [AC_REQUIRE([AC_HEADER_SYS_WAIT]) +dnl AC_CHECK_HEADERS([unistd.h]) +dnl AC_CACHE_CHECK([for restartable system calls, ac_cv_sys_restartable_syscalls], +dnl [AC_RUN_IFELSE([AC_LANG_SOURCE([[/* Exit 0 (true) if wait returns something other than -1, +dnl i.e. the pid of the child, which means that wait was restarted +dnl after getting the signal. */ +dnl #include <sys/types.h> +dnl #include <signal.h> +dnl #if HAVE_UNISTD_H +dnl # include <unistd.h> +dnl #endif +dnl #if HAVE_SYS_WAIT_H +dnl # include <sys/wait.h> +dnl #endif + +dnl /* Some platforms explicitly require an extern "C" signal handler +dnl when using C++. */ +dnl #ifdef __cplusplus +dnl extern "C" +dnl #endif +dnl void ucatch (int) { } + +dnl main () { +dnl int i = fork (), status; +dnl if (i == 0) { sleep (3); kill (getppid (), SIGINT); sleep (3); exit (0); } +dnl signal (SIGINT, ucatch); +dnl status = wait(&i); +dnl if (status == -1) wait(&i); +dnl exit (status == -1); +dnl } +dnl ]])],[ac_cv_sys_restartable_syscalls=yes],[ac_cv_sys_restartable_syscalls=no],[])]) +dnl if test $ac_cv_sys_restartable_syscalls = yes; then +dnl AC_DEFINE([HAVE_RESTARTABLE_SYSCALLS]) +dnl fi +dnl ]) |