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[Qemu-devel] [PATCH] configure: fix double check tests with Clang
From: |
Blue Swirl |
Subject: |
[Qemu-devel] [PATCH] configure: fix double check tests with Clang |
Date: |
Thu, 9 Aug 2012 20:31:04 +0000 |
Configuring with Clang compiler with -Werror would not work after
improved checks:
/tmp/qemu-conf--25992-.c:4:32: error: self-comparison always evaluates
to true [-Werror,-Wtautological-compare]
int main(void) { return preadv == preadv; }
/tmp/qemu-conf--25992-.c:13:26: error: self-comparison always
evaluates to true [-Werror,-Wtautological-compare]
return epoll_create1 == epoll_create1;
/tmp/qemu-conf--25992-.c:3:13: error: explicitly assigning a variable
of type 'char **' to itself [-Werror,-Wself-assign]
environ = environ;
Avoid the errors by adjusting the tests.
Signed-off-by: Blue Swirl <address@hidden>
---
configure | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/configure b/configure
index d8ec050..c2955f8 100755
--- a/configure
+++ b/configure
@@ -2255,7 +2255,7 @@ cat > $TMPC <<EOF
#include <sys/types.h>
#include <sys/uio.h>
#include <unistd.h>
-int main(void) { return preadv == preadv; }
+int main(void) { return preadv(0, (void *)0, 0, 0); }
EOF
preadv=no
if compile_prog "" "" ; then
@@ -2551,7 +2551,7 @@ int main(void)
* warning but not an error, and will proceed to fail the
* qemu compile where we compile with -Werror.)
*/
- return epoll_create1 == epoll_create1;
+ return (int)(uintptr_t)&epoll_create1;
}
EOF
if compile_prog "" "" ; then
@@ -2944,7 +2944,7 @@ has_environ=no
cat > $TMPC << EOF
#include <unistd.h>
int main(void) {
- environ = environ;
+ environ = (void *)0;
return 0;
}
EOF
--
1.7.2.5
- [Qemu-devel] [PATCH] configure: fix double check tests with Clang,
Blue Swirl <=