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Issue #7272: Add configure test to detect whether sem_open works

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properly, and use this to skip test_multiprocessing on platforms
where sem_open raises a signal.  This should fix some FreeBSD buildbot
failures for test_multiprocessing.
This commit is contained in:
Mark Dickinson 2009-11-20 19:30:22 +00:00
parent ab44226198
commit c4920e86ef
6 changed files with 127 additions and 5 deletions
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85
configure vendored
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@ -23782,6 +23782,91 @@ fi
LIBS_SAVE=$LIBS
LIBS="$LIBS $LIBM"
# For multiprocessing module, check that sem_open
# actually works. For FreeBSD versions <= 7.2,
# the kernel module that provides POSIX semaphores
# isn't loaded by default, so an attempt to call
# sem_open results in a 'Signal 12' error.
{ echo "$as_me:$LINENO: checking whether POSIX semaphores are enabled" >&5
echo $ECHO_N "checking whether POSIX semaphores are enabled... $ECHO_C" >&6; }
if test "${ac_cv_posix_semaphores_enabled+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
else
if test "$cross_compiling" = yes; then
ac_cv_posix_semaphores_enabled=yes
else
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <semaphore.h>
#include <sys/stat.h>
int main(void) {
sem_t *a = sem_open("/autoconf", O_CREAT, S_IRUSR|S_IWUSR, 0);
if (a == SEM_FAILED) {
perror("sem_open");
return 1;
}
sem_close(a);
return 0;
}
_ACEOF
rm -f conftest$ac_exeext
if { (ac_try="$ac_link"
case "(($ac_try" in
*\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
*) ac_try_echo=$ac_try;;
esac
eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
(eval "$ac_link") 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } && { ac_try='./conftest$ac_exeext'
{ (case "(($ac_try" in
*\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
*) ac_try_echo=$ac_try;;
esac
eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
(eval "$ac_try") 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
ac_cv_posix_semaphores_enabled=yes
else
echo "$as_me: program exited with status $ac_status" >&5
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
( exit $ac_status )
ac_cv_posix_semaphores_enabled=no
fi
rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
fi
fi
{ echo "$as_me:$LINENO: result: $ac_cv_posix_semaphores_enabled" >&5
echo "${ECHO_T}$ac_cv_posix_semaphores_enabled" >&6; }
if test $ac_cv_posix_semaphores_enabled = no
then
cat >>confdefs.h <<\_ACEOF
#define HAVE_BROKEN_POSIX_SEMAPHORES 1
_ACEOF
fi
# Multiprocessing check for broken sem_getvalue
{ echo "$as_me:$LINENO: checking for broken sem_getvalue" >&5
echo $ECHO_N "checking for broken sem_getvalue... $ECHO_C" >&6; }