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--- lib/replace/autoconf-2.60.m4.orig 2007-11-15 03:15:03.000000000 +0000
+++ lib/replace/autoconf-2.60.m4 2008-06-12 17:56:42.000000000 +0000
@@ -179,6 +179,7 @@
# ------------------------
# Enable extensions on systems that normally disable them,
# typically due to standards-conformance issues.
+m4_ifndef([AC_USE_SYSTEM_EXTENSIONS],[
AC_DEFUN([AC_USE_SYSTEM_EXTENSIONS],
[
AC_BEFORE([$0], [AC_COMPILE_IFELSE])
@@ -208,3 +209,4 @@
AC_DEFINE([__EXTENSIONS__])
AC_DEFINE([_POSIX_PTHREAD_SEMANTICS])
])
+])
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