Define macro QEMU_GNUC_PREREQ and use it

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5467 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 7 insertions, 0 deletions

diff --git a/osdep.h b/osdep.h
index 9e8547cea..87f024b12 100644
--- a/osdep.h
+++ b/osdep.h
@@ -62,6 +62,13 @@
 
 #define qemu_printf printf
 
+#if defined (__GNUC__) && defined (__GNUC_MINOR_)
+# define QEMU_GNUC_PREREQ(maj, min) \
+         ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
+#else
+# define QEMU_GNUC_PREREQ(maj, min) 0
+#endif
+
 void *qemu_memalign(size_t alignment, size_t size);
 void *qemu_vmalloc(size_t size);
 void qemu_vfree(void *ptr);