Fix test failure on Cygwin.

[gnulib.git] / m4 / mmap-anon.m4

diff --git a/m4/mmap-anon.m4 b/m4/mmap-anon.m4
index d0fefeb..13fbd3c 100644 (file)
--- a/m4/mmap-anon.m4
+++ b/m4/mmap-anon.m4
@@ -1,5 +1,5 @@
-# mmap-anon.m4 serial 2
-dnl Copyright (C) 2005 Free Software Foundation, Inc.
+# mmap-anon.m4 serial 4
+dnl Copyright (C) 2005, 2007 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -11,7 +11,7 @@ AC_DEFUN([gl_FUNC_MMAP_ANON],
   AC_REQUIRE([AC_PROG_EGREP])
 
   dnl Persuade glibc <sys/mman.h> to define MAP_ANONYMOUS.
-  AC_REQUIRE([AC_GNU_SOURCE])
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
 
   # Check for mmap()
   AC_FUNC_MMAP
@@ -27,8 +27,8 @@ AC_DEFUN([gl_FUNC_MMAP_ANON],
 #endif
 ],
       [gl_have_mmap_anonymous=yes])
-    if test $gl_have_mmap_anonymous = no; then
-      AC_EGREP_HEADER([MAP_ANON], [
+    if test $gl_have_mmap_anonymous != yes; then
+      AC_EGREP_CPP([I cant identify this map.], [
 #include <sys/mman.h>
 #ifdef MAP_ANON
     I cant identify this map.