[Xen-changelog] [xen-unstable] libxl: fix build for gcc prior to 4.3

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Jan Beulich <JBeulich@xxxxxxxx>
# Date 1344877717 -3600
# Node ID 9d572b6b65f2da8a75c804a629739d36e4cafe31
# Parent  14788c9cb6456c10086c793656bd2d51cf795dc8
libxl: fix build for gcc prior to 4.3

So far all we (explicitly) require is gcc 3.4 or better, so we
shouldn't be unconditionally using features supported only by much
newer versions.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Committed-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
---


diff -r 14788c9cb645 -r 9d572b6b65f2 tools/libxl/libxl_internal.h
--- a/tools/libxl/libxl_internal.h      Mon Aug 13 14:11:22 2012 +0100
+++ b/tools/libxl/libxl_internal.h      Mon Aug 13 18:08:37 2012 +0100
@@ -55,8 +55,10 @@
 #ifdef LIBXL_H
 # error libxl.h should be included via libxl_internal.h, not separately
 #endif
-#define LIBXL_EXTERNAL_CALLERS_ONLY \
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
+# define LIBXL_EXTERNAL_CALLERS_ONLY \
     __attribute__((warning("may not be called from within libxl")))
+#endif
 
 #include "libxl.h"
 #include "_paths.h"

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