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[Qemu-devel] [PATCH 05/10] configure: Fix check for fdatasync()
From: |
Andreas Färber |
Subject: |
[Qemu-devel] [PATCH 05/10] configure: Fix check for fdatasync() |
Date: |
Tue, 14 Jun 2011 03:22:02 +0200 |
From: Alexandre Raymond <address@hidden>
Under Darwin, a symbol exists for the fdatasync() function, so that our
link test succeeds. However _POSIX_SYNCHRONIZED_IO is set to '-1'.
According to POSIX:2008, a value of -1 means the feature is not supported.
A value of 0 means supported at compilation time, and a value greater 0
means supported at both compilation and run time.
Enable fdatasync() only if _POSIX_SYNCHRONIZED_IO is '>0'.
Signed-off-by: Alexandre Raymond <address@hidden>
Signed-off-by: Andreas Färber <address@hidden>
---
configure | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/configure b/configure
index c931ae8..6101f4e 100755
--- a/configure
+++ b/configure
@@ -2461,7 +2461,13 @@ fi
fdatasync=no
cat > $TMPC << EOF
#include <unistd.h>
-int main(void) { return fdatasync(0); }
+int main(void) {
+#if defined(_POSIX_SYNCHRONIZED_IO) && _POSIX_SYNCHRONIZED_IO > 0
+return fdatasync(0);
+#else
+#abort Not supported
+#endif
+}
EOF
if compile_prog "" "" ; then
fdatasync=yes
--
1.7.5.3
- [Qemu-devel] [PULL 00/10] Fixes for Cocoa backend, Andreas Färber, 2011/06/13
- [Qemu-devel] [PATCH 01/10] cocoa: do not create a spurious window for -version, Andreas Färber, 2011/06/13
- [Qemu-devel] [PATCH 02/10] Fix compilation warning due to incorrectly specified type, Andreas Färber, 2011/06/13
- [Qemu-devel] [PATCH 03/10] Cocoa: avoid displaying window when command-line contains '-h' or '-help', Andreas Färber, 2011/06/13
- [Qemu-devel] [PATCH 04/10] Remove warning in printf due to type mismatch, Andreas Färber, 2011/06/13
- [Qemu-devel] [PATCH 05/10] configure: Fix check for fdatasync(),
Andreas Färber <=
- [Qemu-devel] [PATCH 06/10] Fix libfdt warnings on Darwin, Andreas Färber, 2011/06/13
- [Qemu-devel] [PATCH 07/10] cocoa: Provide central qemu_main() prototype, Andreas Färber, 2011/06/13
- [Qemu-devel] [PATCH 08/10] cocoa: Revert dependency on VNC, Andreas Färber, 2011/06/13
- [Qemu-devel] [PATCH 09/10] cocoa: Avoid warning related to multiple handleEvent: definitions, Andreas Färber, 2011/06/13
- [Qemu-devel] [PATCH 10/10] Darwin: Fix compilation warning regarding the deprecated daemon() function, Andreas Färber, 2011/06/13
- Re: [Qemu-devel] [PATCH 08/10] cocoa: Revert dependency on VNC, Jes Sorensen, 2011/06/27
Re: [Qemu-devel] [PULL 00/10] Fixes for Cocoa backend, Blue Swirl, 2011/06/15