X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fmemchr.m4;h=a96d1140e04e0448a10abf7a0543677453cdaeab;hb=0e3e69f9f9b31a7d8516bb9699471db6a43bd3c8;hp=0f899d21ea0bbf08f851ae5360c5549804d1c6e0;hpb=3ad7edd60e7fbc0f21ebda351fed502376135cf6;p=gnulib.git

diff --git a/m4/memchr.m4 b/m4/memchr.m4
index 0f899d21e..a96d1140e 100644
--- a/m4/memchr.m4
+++ b/m4/memchr.m4
@@ -1,10 +1,10 @@
-# memchr.m4 serial 6
-dnl Copyright (C) 2002, 2003, 2004, 2009 Free Software Foundation, Inc.
+# memchr.m4 serial 7
+dnl Copyright (C) 2002-2004, 2009 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.
 
-AC_DEFUN([gl_FUNC_MEMCHR],
+AC_DEFUN_ONCE([gl_FUNC_MEMCHR],
 [
   dnl Check for prerequisites for memory fence checks.
   gl_FUNC_MMAP_ANON
@@ -53,11 +53,11 @@ AC_DEFUN([gl_FUNC_MEMCHR],
     {
       int pagesize = getpagesize ();
       char *two_pages =
-	(char *) mmap (NULL, 2 * pagesize, PROT_READ | PROT_WRITE,
-		       flags, fd, 0);
+        (char *) mmap (NULL, 2 * pagesize, PROT_READ | PROT_WRITE,
+                       flags, fd, 0);
       if (two_pages != (char *)(-1)
-	  && mprotect (two_pages + pagesize, pagesize, PROT_NONE) == 0)
-	fence = two_pages + pagesize;
+          && mprotect (two_pages + pagesize, pagesize, PROT_NONE) == 0)
+        fence = two_pages + pagesize;
     }
 #endif
   if (fence)