Merged revisions 76566 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k
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r76566 | mark.dickinson | 2009-11-28 12:48:43 +0000 (Sat, 28 Nov 2009) | 18 lines
Merged revisions 76432,76558 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
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r76432 | mark.dickinson | 2009-11-20 19:30:22 +0000 (Fri, 20 Nov 2009) | 5 lines
Issue #7272: Add configure test to detect whether sem_open works
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.
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r76558 | mark.dickinson | 2009-11-28 10:44:20 +0000 (Sat, 28 Nov 2009) | 4 lines
Issue #7272, continued: don't re-use existing HAVE_BROKEN_POSIX_SEMAPHORES
to indicate that semaphores aren't available; define a new variable
POSIX_SEMAPHORES_NOT_ENABLED instead.
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diff --git a/configure.in b/configure.in
index 1d024cd..09714d5 100644
--- a/configure.in
+++ b/configure.in
@@ -3338,6 +3338,40 @@
LIBS=$LIBS_SAVE
+# For multiprocessing module, check that sem_open
+# actually works. For FreeBSD versions <= 7.2,
+# the kernel module that provides POSIX semaphores
+# isn't loaded by default, so an attempt to call
+# sem_open results in a 'Signal 12' error.
+AC_MSG_CHECKING(whether POSIX semaphores are enabled)
+AC_CACHE_VAL(ac_cv_posix_semaphores_enabled,
+AC_TRY_RUN([
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <semaphore.h>
+#include <sys/stat.h>
+
+int main(void) {
+ sem_t *a = sem_open("/autoconf", O_CREAT, S_IRUSR|S_IWUSR, 0);
+ if (a == SEM_FAILED) {
+ perror("sem_open");
+ return 1;
+ }
+ sem_close(a);
+ return 0;
+}
+], ac_cv_posix_semaphores_enabled=yes,
+ ac_cv_posix_semaphores_enabled=no,
+ ac_cv_posix_semaphores_enabled=yes)
+)
+AC_MSG_RESULT($ac_cv_posix_semaphores_enabled)
+if test $ac_cv_posix_semaphores_enabled = no
+then
+ AC_DEFINE(POSIX_SEMAPHORES_NOT_ENABLED, 1,
+ [Define if POSIX semaphores aren't enabled on your system])
+fi
+
# Multiprocessing check for broken sem_getvalue
AC_MSG_CHECKING(for broken sem_getvalue)
AC_TRY_RUN([