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[Qemu-devel] [PATCH 10/12] qemu-barrier: Fix compiler version check for
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] [PATCH 10/12] qemu-barrier: Fix compiler version check for future gcc versions |
Date: |
Fri, 5 Oct 2012 16:00:30 +0200 |
From: Stefan Weil <address@hidden>
The current check will give a wrong result for gcc-5.x with x < 4.
Using QEMU_GNUC_PREREQ is simpler and fixes that issue.
Signed-off-by: Stefan Weil <address@hidden>
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
qemu-barrier.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/qemu-barrier.h b/qemu-barrier.h
index 7e11197..16f0942 100644
--- a/qemu-barrier.h
+++ b/qemu-barrier.h
@@ -19,7 +19,7 @@
* mfence on 32 bit as well, e.g. if built with -march=pentium-m.
* However, on i386, there seem to be known bugs as recently as 4.3.
* */
-#if defined(__GNUC__) && __GNUC__ >= 4 && __GNUC_MINOR__ >= 4
+#if QEMU_GNUC_PREREQ(4, 4)
#define smp_mb() __sync_synchronize()
#else
#define smp_mb() asm volatile("lock; addl $0,0(%%esp) " ::: "memory")
--
1.7.11.4
- [Qemu-devel] [PULL 00/12] Trivial patches for 24 September to 5 October 2012, Stefan Hajnoczi, 2012/10/05
- [Qemu-devel] [PATCH 03/12] cpu: Add missing 'static' attribute to qemu_global_mutex, Stefan Hajnoczi, 2012/10/05
- [Qemu-devel] [PATCH 02/12] configure: Support empty target list (--target-list=), Stefan Hajnoczi, 2012/10/05
- [Qemu-devel] [PATCH 01/12] hw: Fix return value check for bdrv_read, bdrv_write, Stefan Hajnoczi, 2012/10/05
- [Qemu-devel] [PATCH 05/12] slirp: Fix spelling in comment (enought -> enough, insure -> ensure), Stefan Hajnoczi, 2012/10/05
- [Qemu-devel] [PATCH 04/12] tcg/arm: Use tcg_out_mov_reg rather than inline equivalent code, Stefan Hajnoczi, 2012/10/05
- [Qemu-devel] [PATCH 07/12] qemu-sockets: Fix compiler warning (regression for MinGW), Stefan Hajnoczi, 2012/10/05
- [Qemu-devel] [PATCH 06/12] vnc: Fix spelling (hellmen -> hellman) in comment, Stefan Hajnoczi, 2012/10/05
- [Qemu-devel] [PATCH 10/12] qemu-barrier: Fix compiler version check for future gcc versions,
Stefan Hajnoczi <=
- [Qemu-devel] [PATCH 08/12] cleanup useless return sentence, Stefan Hajnoczi, 2012/10/05
- [Qemu-devel] [PATCH 09/12] hw: Add missing 'static' attribute for QEMUMachine, Stefan Hajnoczi, 2012/10/05
- [Qemu-devel] [PATCH 12/12] versatilepb: Use symbolic indices for ARM PIC, Stefan Hajnoczi, 2012/10/05
- [Qemu-devel] [PATCH 11/12] qdev: kill bogus comment, Stefan Hajnoczi, 2012/10/05
- Re: [Qemu-devel] [PULL 00/12] Trivial patches for 24 September to 5 October 2012, Aurelien Jarno, 2012/10/06