[libvirt] [PATCH libvirt-python v3 07/40] Import gnulib's ignore_value macro

From: "Daniel P. Berrange" <berrange(a)redhat.com&gt; Signed-off-by: Daniel P. Berrange <berrange(a)redhat.com&gt; --- 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__ */ -- 1.8.3.1