dnl ------------------------------------------------------------------------- dnl $Id$ dnl dnl ACE M4 include file which contains general M4 macros dnl to be used by the ACE configure script. dnl dnl The macros in this file were designed for ACE but should be dnl general enough for general use. dnl dnl ------------------------------------------------------------------------- dnl Copyright (C) 1998, 1999, 2000, 2002 Ossama Othman dnl dnl All Rights Reserved dnl dnl This library is free software; you can redistribute it and/or dnl modify it under the current ACE distribution terms. dnl dnl This library is distributed in the hope that it will be useful, dnl but WITHOUT ANY WARRANTY; without even the implied warranty of dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. dnl miscellaneous macros dnl Prevent the configure script continuing any further if a CVS control dnl directory is found. The idea is to prevent files generated during dnl configuration and build from be checked in to the CVS repository that dnl the sources are checked into. This should only be an issue for dnl maintainers, not end-users. Maintainers should configure and build in dnl a directory that doesn't contain any CVS controlled sources and files, dnl i.e. that doesn't contain a CVS directory. dnl dnl Usage: ACE_CHECK_FOR_CVS_DIR AC_DEFUN([ACE_CHECK_FOR_CVS_DIR], [ if test -d CVS; then AC_MSG_ERROR( [ This error is meant for maintainers: Please configure and build in a non-CVS controlled directory. Doing so will prevent accidentally committing automatically generated files into the CVS repository and help ensure that the generated files and build scheme are correct. For example, try the following from the top-level source directory: mkdir objdir cd objdir ../configure make This will create a build space in the directory `objdir' and start a build in that directory. ]) fi ]) dnl Prevent the configure script from continuing any further if dnl configuration is being performed in the top-level directory. The dnl idea is to prevent files generated during configuration and build dnl from overwriting the stock files of the same name. dnl Usage: ACE_CHECK_TOP_SRCDIR AC_DEFUN([ACE_CHECK_TOP_SRCDIR], [ if test "$srcdir" = "." && test "$USE_MAINTAINER_MODE" != "yes"; then AC_MSG_ERROR( [ Please configure and build in a directory other than the top-level source directory. Doing so will prevent files distributed with the package from being overwritten. This is currently necessary since autoconf support is still experimental. If you encounter problems please use the stock build procedure. For example, try the following from the top-level source directory: mkdir objdir cd objdir ../configure make This will create a build space in the directory `objdir' and start a build in that directory. ]) fi ]) dnl Add compiler flags to the CXXFLAGS and CFLAGS variables when doing an dnl AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],[],[]) (not ACE_TRY_COMPILE). dnl Use this macro when adding include directories to the compiler flags, dnl for example. dnl Usage: ACE_TRY_COMPILE(COMPILER-FLAGS, INCLUDES, FUNCTION-BODY, dnl [ACTION-IF-FOUND [,ACTION-IF-NOT-FOUND]]) AC_DEFUN([ACE_TRY_COMPILE], [ AC_LANG([C++]) AC_REQUIRE([AC_LANG]) ace_pre_try_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS $1" AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[$2]], [[$3]])],[$4],[$5]) dnl Restore the C++ flags CXXFLAGS="$ace_pre_try_CXXFLAGS" ]) dnl Create a temporary empty file and remove it after commands are done using dnl it. The directory in which the temporary file will be created in must dnl exist. Files will be created under the source directory, not the build dnl directory. dnl Use this macro when you need a particular file available but want it to be dnl empty. This is useful to prevent conflicts with autoconf's confdefs.h dnl header when doing an AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],[],[]). dnl Usage: ACE_USE_TEMP_FILE(TEMP-FILE-TO-CREATE, COMMANDS-THAT-WILL-USE-IT) AC_DEFUN([ACE_USE_TEMP_FILE], [ test -d $1 && AC_MSG_ERROR([cannot create file: $acetmp is a directory]) dnl Make sure contents of existing file don't override the contents dnl of the temporary one. test -f ${srcdir}/$1 && mv ${srcdir}/$1 ${srcdir}/$1.conf if test ${srcdir} != "."; then dnl Create all of the sub-directories. AS_MKDIR_P([`AS_DIRNAME(["$1"])`]) fi touch $1 $2 if test -f ${srcdir}/$1.conf; then mv ${srcdir}/$1.conf ${srcdir}/$1 fi if test ${srcdir} != "."; then dnl Remove the file. Any sub-directories will not be removed dnl since we have no way to tell if they existed prior to the dnl creation of this file. rm $1 fi ]) dnl Run given test(s) with warnings converted to errors dnl Usage: ACE_CONVERT_WARNINGS_TO_ERRORS(TEST-BLOCK) AC_DEFUN([ACE_CONVERT_WARNINGS_TO_ERRORS], [ dnl $WERROR is set in the ACE_SET_COMPILER_FLAGS macro. AC_REQUIRE([ACE_SET_COMPILER_FLAGS]) dnl Some tests may pass because the compiler issues warnings dnl instead of errors when errors should occur. This macro converts dnl warnings to errors when executing the action/test passed to this dnl macro so that action/test fails when it is supposed to fail; at dnl least that is the idea. ace_pre_warning_CXXFLAGS="$CXXFLAGS" CXXFLAGS="$CXXFLAGS $WERROR" $1 CXXFLAGS="$ace_pre_warning_CXXFLAGS" ]) dnl Wrapper around AC_CACHE_VAL used to ensure "ACTION-IF" commands are run dnl even if results have been previously cached. dnl Usage: ACE_CACHE_CHECK(MESSAGE, CACHE-ID, COMMANDS-TO-SET-CACHE-VAL, dnl ACTION-IF-CACHE-ID-IS-YES, dnl ACTION-IF-CACHE-ID-IS-NO) dnl The COMMANDS-TO-SET-CACHE-VAL should set the CACHE-ID to yes or "no," dnl otherwise the "ACTION-IF*" commands may not run. The dnl COMMANDS-TO-SET-CACHE-VAL should only set the CACHE value. For example, dnl no AC_DEFINES should be placed in the COMMANDS-TO-SET-CACHE-VAL. AC_DEFUN([ACE_CACHE_CHECK], [ AC_MSG_CHECKING([$1]) AC_CACHE_VAL([$2], [$3]) AC_MSG_RESULT([[$]$2]) if test "[$]$2" != no; then ace_just_a_place_holder=fixme ifelse([$4], , :, [$4]) else ace_just_a_place_holder=fixme ifelse([$5], , , [$5 ]) fi ]) dnl checks for programs dnl checks for libraries dnl checks for header files dnl checks for typedefs dnl Check for specific typedef in given header file dnl Usage: ACE_CHECK_TYPE(TYPEDEF, INCLUDE, dnl [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]) dnl This macro can only check for one typedef in one header file at a time!! AC_DEFUN([ACE_CHECK_TYPE], [ dnl AC_REQUIRE([AC_PROG_CXX]) dnl AC_REQUIRE([AC_PROG_CXXCPP]) dnl AC_LANG([C++]) dnl AC_REQUIRE([AC_LANG]) ACE_CACHE_CHECK([for $1 in $2], [ace_cv_type_$1], [ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <$2> ]], [[ $1 ace_$1; ]])],[ ace_cv_type_$1=yes ],[ ace_cv_type_$1=no ]) ],[$3],[$4]) ]) dnl checks for structures dnl Check for specific struct in given header file dnl Usage: ACE_CHECK_STRUCT(STRUCTURE, INCLUDE, dnl [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]) dnl This macro can only check for one struct in one header file at a time!! AC_DEFUN([ACE_CHECK_STRUCT], [ dnl AC_REQUIRE([AC_PROG_CXX]) dnl AC_REQUIRE([AC_PROG_CXXCPP]) dnl AC_LANG([C++]) dnl AC_REQUIRE([AC_LANG]) dnl Do the transliteration at runtime so arg 1 can be a shell variable. dnl ac_safe=`echo "$1" | sed 'y%./+-%__p_%'` ACE_CACHE_CHECK([for struct $1 in $2], [ace_cv_struct_$1], [ ACE_TRY_COMPILE_STRUCT([$1], [$2], [ ace_cv_struct_$1=yes ], [ ace_cv_struct_$1=no ]) ], $3, $4) ]) dnl Check for specific struct in given header file by compiling a test dnl program. This macro is used by ACE_CHECK_STRUCT. dnl Usage: ACE_TRY_COMPILE_STRUCT(STRUCTURE, INCLUDE, dnl [ACTION-IF-SUCCESSFUL[, ACTION-IF-NOT-SUCCESSFUL]]) dnl This macro can only check for one struct in one header file at a time!! AC_DEFUN([ACE_TRY_COMPILE_STRUCT], [ dnl AC_REQUIRE([AC_PROG_CXX]) dnl AC_REQUIRE([AC_PROG_CXXCPP]) dnl AC_LANG([C++]) dnl AC_REQUIRE([AC_LANG]) AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <$2> ]], [[ struct $1 ace_$1; ]])],[ $3 ],[ dnl Some compilers don't like the "struct" but we need the struct for dnl some platforms to resolve ambiguities between functions and dnl structures with with the same name. So, we try the same test but dnl without "struct" if the above test with "struct" fails. If both dnl tests fail, then we can be reasonably sure that we don't have the dnl structure we are testing for. AC_COMPILE_IFELSE([AC_LANG_PROGRAM( [[ #include <$2> ]], [[ $1 ace_$1; ]])], [ $3 ], [ $4 ]) ]) ]) dnl checks for variables dnl checks for compiler characteristics dnl checks for library functions dnl Check for function using prototype in header dnl This macro is used if a function is called a different name in a given dnl library than what is in the header file but the difference is made dnl transparent to the user since the header may provide a macro to make dnl things "transparent." If the given header does not exist then this dnl macro acts just like the standard AC_CHECK_FUNC macro. dnl Usage: ACE_CHECK_FUNC(FUNCTION, HEADER, dnl [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]) AC_DEFUN([ACE_CHECK_FUNC], [ dnl AC_REQUIRE([AC_PROG_CXX]) dnl AC_REQUIRE([AC_PROG_CXXCPP]) dnl AC_LANG([C++]) dnl AC_REQUIRE([AC_LANG]) AC_REQUIRE([AC_PROG_AWK]) AC_PREPROC_IFELSE([AC_LANG_SOURCE([[ #include <$2> ]])],[ace_header_exists=yes],[ace_header_exists=no]) cat > conftest.$ac_ext < ACE_REAL_FUNCTION $1 EOF if test "$ace_header_exists" = yes; then if test -z "$AWK"; then AC_MSG_WARN([No awk program found. Real $1 function may not be found.]) fi if (eval "$ac_cpp conftest.$ac_ext") 2>&5 | $EGREP "ACE_REAL_FUNCTION" | (eval "$AWK '{print \[$]2}' > conftest.awk 2>&1"); then rm -f conftest.$ac_ext ace_real_function=`cat conftest.awk` rm -f conftest.awk fi if test $1 != "$ace_real_function"; then AC_MSG_CHECKING([for real $1 from $2]) AC_MSG_RESULT([$ace_real_function]) fi else ace_real_function=$1 fi dnl test "$ace_header_not_exist" != yes AC_CHECK_FUNC([$ace_real_function],[$3],[$4]) ]) dnl Check for function in library using prototype in header dnl This macro is used if a function is called a different name in a given dnl library than what is in the header file but the difference is made dnl transparent to the user since the header may provide a macro to make dnl things "transparent." If the given header does not exist then this dnl macro acts just like the standard AC_CHECK_LIB macro. dnl Usage: ACE_CHECK_LIB(LIBRARY, FUNCTION, HEADER, dnl [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]) AC_DEFUN([ACE_CHECK_LIB], [ dnl AC_REQUIRE([AC_PROG_CXX]) dnl AC_REQUIRE([AC_PROG_CXXCPP]) dnl AC_LANG([C++]) dnl AC_REQUIRE([AC_LANG]) AC_REQUIRE([AC_PROG_AWK]) AC_PREPROC_IFELSE([AC_LANG_SOURCE([[ #include <$3> ]])],[ace_header_exists=yes],[ace_header_exists=no]) cat > conftest.$ac_ext < ACE_REAL_FUNCTION $2 EOF if test "$ace_header_exists" = yes; then if test -z "$AWK"; then AC_MSG_WARN([No awk program found. "Real" function in library may not be found.]) fi if (eval "$ac_cpp conftest.$ac_ext") 2>&5 | $EGREP "ACE_REAL_FUNCTION" | eval "$AWK '{print \[$]2}'" > conftest.awk 2>&1; then rm -f conftest.$ac_ext ace_real_function=`cat conftest.awk` rm -f conftest.awk fi if test $2 != "$ace_real_function"; then AC_MSG_CHECKING([for real $2 from $3]) AC_MSG_RESULT([$ace_real_function]) fi else ace_real_function=$2 fi dnl test "$ace_header_not_exist" != yes AC_CHECK_LIB([$1], [$ace_real_function], [$4], [$5]) ]) dnl Check if getrlimit() takes an enum as 1st argument dnl Usage: ACE_CHECK_SETRLIMIT_ENUM AC_DEFUN([ACE_CHECK_SETRLIMIT_ENUM], [ if test "$ac_cv_func_setrlimit" = yes; then AC_MSG_CHECKING([if setrlimit() takes an enum as 1st argument]) AC_EGREP_HEADER([setrlimit.*\(.*[^,]*enum], sys/resource.h, [ cat > conftest.$ac_ext < EOF dnl Here we attempt to determine the type of the first argument of dnl getrusage from its prototype. It should either be an int or an dnl enum. If it is an enum, determine the enum type. ace_setrlimit_enum=`eval "$ac_cpp conftest.$ac_ext" | \ $EGREP '[[ ]]+setrlimit.*\(.*[[^,]]*enum' | \ sed -e 's/^.*setrlimit.*(.*enum//' -e 's/[[^ ]]*,.*$//'` ace_setrlimit_enum="enum $ace_setrlimit_enum" AC_MSG_RESULT([$ace_setrlimit_enum]) if test -n "$ace_setrlimit_enum"; then AC_DEFINE_UNQUOTED([ACE_HAS_RLIMIT_RESOURCE_ENUM], [$ace_setrlimit_enum]) fi rm -rf conftest* dnl Do not remove this parenthesis --> ) dnl It's only purpose to keep Emacs from getting confused about mismatched dnl parentheses. ], [ AC_MSG_RESULT([no]) ]) fi dnl test "$ac_cv_func_setrlimit" = yes ]) dnl Check if getrusage() takes an enum as 1st argument dnl Usage: ACE_CHECK_GETRUSAGE_ENUM AC_DEFUN([ACE_CHECK_GETRUSAGE_ENUM], [ if test "$ac_cv_func_getrusage" = yes; then AC_MSG_CHECKING([if getrusage() takes an enum as 1st argument]) AC_EGREP_HEADER([getrusage.*\(.*[^,]*enum], [sys/resource.h], [ cat > conftest.$ac_ext < EOF dnl Here we attempt to determine the type of the first argument of dnl getrusage from its prototype. It should either be an int or an dnl enum. If it is an enum, determine the enum type. ace_rusage_who=`eval "$ac_cpp conftest.$ac_ext" | \ $EGREP '[[ ]]+getrusage.*\(.*[[^,]]*enum' | \ sed -e 's/^.*getrusage.*(.*enum//' -e 's/[[^ ]]*,.*$//'` ace_rusage_who="enum $ace_rusage_who" AC_MSG_RESULT([$ace_rusage_who]) if test -n "$ace_rusage_who"; then AC_DEFINE_UNQUOTED([ACE_HAS_RUSAGE_WHO_ENUM], [$ace_rusage_who]) fi rm -rf conftest* dnl Do not remove this parenthesis --> ) dnl It's only purpose to keep Emacs from getting confused about mismatched dnl parentheses. ], [ AC_MSG_RESULT([no]) ]) fi dnl test "$ac_cv_func_getrusage" = yes ]) dnl Check for 64 bit llseek() or lseek64() dnl Usage: ACE_CHECK_LSEEK64 AC_DEFUN([ACE_CHECK_LSEEK64], [ AC_CHECK_FUNC([lseek64], [ AC_DEFINE([ACE_HAS_LSEEK64]) dnl Check for 64 bit offset type in the lseek64() prototype, if it dnl exists. dnl ACE_CHECK_OFF64_T([lseek64]) dnl Check if _LARGEFILE64_SOURCE macro is needed to make the dnl lseek64() prototype visible, or if the prototype itself is missing. ACE_CACHE_CHECK([for lseek64 prototype], [ace_cv_lib_has_lseek64_prototype], [ ace_save_CPPFLAGS="$CPPFLAGS" ace_no_largefile64="-U_LARGEFILE64_SOURCE" CPPFLAGS="$CPPFLAGS $ace_no_largefile64" AC_EGREP_HEADER([[^_]+lseek64], [unistd.h], [ ace_cv_lib_has_lseek64_prototype=yes ], [ ace_cv_lib_has_lseek64_prototype=no ]) dnl Reset the compiler flags CPPFLAGS="$ace_save_CPPFLAGS" ],[],[AC_DEFINE([ACE_LACKS_LSEEK64_PROTOTYPE])]) ], [ AC_CHECK_FUNC([llseek], [ AC_DEFINE([ACE_HAS_LLSEEK]) dnl Check if _LARGEFILE64_SOURCE macro is needed to make the dnl llseek() prototype visible, or if the prototype itself is dnl missing. dnl Check for 64 bit offset type in the llseek() prototype, if dnl it exists. dnl ACE_CHECK_OFF64_T([llseek]) ACE_CACHE_CHECK([for llseek prototype], [ace_cv_lib_has_llseek_prototype], [ ace_save_CPPFLAGS="$CPPFLAGS" ace_no_largefile64="-U_LARGEFILE64_SOURCE" CPPFLAGS="$CPPFLAGS $ace_no_largefile64" AC_EGREP_HEADER([[^_]+llseek],[unistd.h], [ ace_cv_lib_has_llseek_prototype=no ], [ ace_cv_lib_has_llseek_prototype=yes ],) dnl Reset the compiler flags CPPFLAGS="$ace_save_CPPFLAGS" ],[],[AC_DEFINE([ACE_LACKS_LLSEEK_PROTOTYPE])]) ],) ]) ]) dnl Check what the 64 bit offset type is by checking what the offset dnl argument for llseek()/lseek64() is. dnl Usage: ACE_CHECK_LOFF_64(LSEEK64-FUNC) AC_DEFUN([ACE_CHECK_OFF64_T], [ AC_MSG_CHECKING([for 64 bit offset type]) AC_EGREP_HEADER([[ ]+$1.*\(.*],[unistd.h], [ cat > conftest.$ac_ext < /* needed for lseek64()/llseek() prototype */ #endif EOF dnl Here we attempt to determine the type of the second argument of dnl lseek64()/llseek() from its prototype. ace_off64_t=`eval "$ac_cpp conftest.$ac_ext" | \ $EGREP '[[ ]]+lseek64.*\(.*' | \ sed -e 's/^.*(.*,[[ ]]*\(.*\) .*,.*$/\1/'` if test -n "$ace_off64_t"; then AC_MSG_RESULT([$ace_off64_t]) AC_DEFINE_UNQUOTED([ACE_LOFF_T_TYPEDEF], [$ace_off64_t]) fi rm -rf conftest* dnl Do not remove this parenthesis --> ) dnl It's only purpose is to keep Emacs from getting confused about dnl mismatched parentheses. ], [ AC_MSG_RESULT([no]) ]) ]) 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 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 because on OSF/1 3.0 it includes dnl dnl which includes 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 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 dnl #include dnl #if HAVE_UNISTD_H dnl # include dnl #endif dnl #if HAVE_SYS_WAIT_H dnl # include 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 ])