--- IO-AIO/autoconf/configure	2005/07/31 18:14:48	1.1
+++ IO-AIO/autoconf/configure	2005/07/31 18:21:16	1.3
@@ -1244,17 +1244,6 @@
           ac_config_headers="$ac_config_headers config.h"
 
 
-# Enable GNU extensions.
-# Define this here, not in acconfig's @TOP@ section, since definitions
-# in the latter don't make it into the configure-time tests.
-
-cat >>confdefs.h <<\_ACEOF
-#define _GNU_SOURCE 1
-_ACEOF
-
-
-# do NOT define POSIX_SOURCE, since this clashes with many BSDs
-
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'