[glib] configure.ac: fix check for futex and eventfd
- From: Ryan Lortie <desrt src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [glib] configure.ac: fix check for futex and eventfd
- Date: Fri, 20 Jun 2014 20:01:29 +0000 (UTC)
commit 9362a1b2d987125a8aa0723b916d29aaaece329a
Author: Ryan Lortie <desrt desrt ca>
Date: Fri Jun 20 14:43:26 2014 -0400
configure.ac: fix check for futex and eventfd
We were using AC_LANG_PROGRAM to build a program to test for our ability
to call syscall (__NR_futex, ...);. This macro adds "main () { ... }"
around the provided code segment automatically. The provided code
segment provided its own main() function, however.
The result looked something like:
int main (void) {
int main (void) {
...
}
}
which worked on GCC, but not on clang.
Let's fix that. Let's fix the same mistake copied over for eventfd()
detection while we're at it.
configure.ac | 11 -----------
1 files changed, 0 insertions(+), 11 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 6b6ab55..f5487fb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2386,13 +2386,7 @@ AC_CACHE_CHECK(for futex(2) system call,
#include <sys/syscall.h>
#include <unistd.h>
],[
-int
-main (void)
-{
- /* it is not like this actually runs or anything... */
syscall (__NR_futex, NULL, FUTEX_WAKE, FUTEX_WAIT);
- return 0;
-}
])],glib_cv_futex=yes,glib_cv_futex=no))
if test x"$glib_cv_futex" = xyes; then
AC_DEFINE(HAVE_FUTEX, 1, [we have the futex(2) system call])
@@ -2403,12 +2397,7 @@ AC_CACHE_CHECK(for eventfd(2) system call,
#include <sys/eventfd.h>
#include <unistd.h>
],[
-int
-main (void)
-{
eventfd (0, EFD_CLOEXEC);
- return 0;
-}
])],glib_cv_eventfd=yes,glib_cv_eventfd=no))
if test x"$glib_cv_eventfd" = x"yes"; then
AC_DEFINE(HAVE_EVENTFD, 1, [we have the eventfd(2) system call])
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