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[libvirt] [PATCH libvirt-python 12/17] Import gnulib's ignore_value macro



From: "Daniel P. Berrange" <berrange redhat com>

Signed-off-by: Daniel P. Berrange <berrange redhat com>
---
 libvirt-override.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/libvirt-override.c b/libvirt-override.c
index acd06a6..c2c1c18 100644
--- a/libvirt-override.c
+++ b/libvirt-override.c
@@ -51,6 +51,17 @@ extern void initcygvirtmod(void);
 #define xalloc_oversized(n, s) \
     ((size_t) (sizeof (ptrdiff_t) <= sizeof (size_t) ? -1 : -2) / (s) < (n))
 
+/* The __attribute__((__warn_unused_result__)) feature
+   is available in gcc versions 3.4 and newer,
+   while the typeof feature has been available since 2.7 at least.  */
+#if 3 < __GNUC__ + (4 <= __GNUC_MINOR__)
+# define ignore_value(x) \
+    (__extension__ ({ __typeof__ (x) __x = (x); (void) __x; }))
+#else
+# define ignore_value(x) ((void) (x))
+#endif
+
+
 #if 0
 # define DEBUG_ERROR 1
 #endif
-- 
1.8.3.1


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