[Xen-devel] [PATCH v2 3/6] tools/libxc: Use _Static_assert if available

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CC: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
CC: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
---
 tools/libxc/xc_private.h |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/libxc/xc_private.h b/tools/libxc/xc_private.h
index 29e926c..12476ec 100644
--- a/tools/libxc/xc_private.h
+++ b/tools/libxc/xc_private.h
@@ -48,7 +48,11 @@
 #define PAGE_MASK               XC_PAGE_MASK
 
 /* Force a compilation error if condition is true */
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
+#define XC_BUILD_BUG_ON(p) ({ _Static_assert(!(p), "!(" #p ")"); })
+#else
 #define XC_BUILD_BUG_ON(p) ((void)sizeof(struct { int:-!!(p); }))
+#endif
 
 /*
 ** Define max dirty page cache to permit during save/restore -- need to 
balance 
-- 
1.7.10.4


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