(jm_CHECK_ALL_TYPES) [_GNU_SOURCE]: Use the one-arg form

of AC_DEFINE.  Otherwise, the #ifndef in AH_VERBATIM gets clobbered.

diff --git a/m4/jm-macros.m4 b/m4/jm-macros.m4
index 63319cd8466106d3455aa749e79ad83ec84820ab..625a926574746854241b0ee5788e2d9cbc2d05c4 100644 (file)
--- a/m4/jm-macros.m4
+++ b/m4/jm-macros.m4
@@ -202,8 +202,7 @@ AC_DEFUN(jm_CHECK_ALL_TYPES,
 #endif])
 
   # Enable GNU extensions.
-  AC_DEFINE([_GNU_SOURCE], 1,
-    [Enable GNU extensions on systems that have them.])
+  AC_DEFINE([_GNU_SOURCE])
 
   dnl This test must come as early as possible after the compiler configuration
   dnl tests, because the choice of the file model can (in principle) affect