[libvirt] [libvirt-python PATCHv2 07/44] Import gnulib's ignore_value macro

[Doug Goldstein]

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

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

diff --git a/libvirt-utils.h b/libvirt-utils.h
index c1223fd..961cc20 100644
--- a/libvirt-utils.h
+++ b/libvirt-utils.h
@@ -43,4 +43,15 @@
 # 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
+
 #endif /* __LIBVIRT_UTILS_H__ */
-- 
1.8.3.2