(__attribute__): Protect against redefinition.

diff --git a/lib/xalloc.h b/lib/xalloc.h
index f75c3cd..38ae1d0 100644 (file)
--- a/lib/xalloc.h
+++ b/lib/xalloc.h
@@ -26,8 +26,10 @@
 #  endif
 # endif
 
-# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
-#  define __attribute__(x)
+# ifndef __attribute__
+#  if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
+#   define __attribute__(x)
+#  endif
 # endif
 
 # ifndef ATTRIBUTE_NORETURN