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authorDaniel P. Berrange <berrange@redhat.com>2013-11-12 18:21:50 +0000
committerDaniel P. Berrange <berrange@redhat.com>2013-11-22 15:58:05 +0000
commit834ee782d80e39edc1174640b8db977c900a62dc (patch)
tree4c254952755999407d7bbd21cfb8e86ba3b5fdea
parentc856b7c62333d53093818b60259ef22a37430d51 (diff)
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Import gnulib's ignore_value macro
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
-rw-r--r--libvirt-utils.h11
1 files changed, 11 insertions, 0 deletions
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__ */