[libvirt] [PATCH python] define __GNUC_PREREQ macro before using it

[Doug Goldstein]

We brought over use of the __GNUC_PREREQ macro from libvirt but didn't
bring over the definition of it. This brings over the macro from libvirt
sources.
---
 libvirt-utils.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/libvirt-utils.h b/libvirt-utils.h
index f55be7b..add7553 100644
--- a/libvirt-utils.h
+++ b/libvirt-utils.h
@@ -65,6 +65,15 @@
 # endif
 
 # ifdef __GNUC__
+
+#  ifndef __GNUC_PREREQ
+#   if defined __GNUC__ && defined __GNUC_MINOR__
+#    define __GNUC_PREREQ(maj, min)                                        \
+    ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
+#   else
+#    define __GNUC_PREREQ(maj,min) 0
+#   endif
+
 /**
  * ATTRIBUTE_UNUSED:
  *
-- 
1.8.3.2