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[gnulib.git] / m4 / strnlen.m4

diff --git a/m4/strnlen.m4 b/m4/strnlen.m4
index 67964c8..1c97859 100644 (file)
--- a/m4/strnlen.m4
+++ b/m4/strnlen.m4
@@ -1,29 +1,31 @@
-# strnlen.m4 serial 5
-dnl Copyright (C) 2002-2003, 2005 Free Software Foundation, Inc.
+# strnlen.m4 serial 10
+dnl Copyright (C) 2002-2003, 2005-2007, 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_STRNLEN],
 [
-  AC_LIBSOURCES([strnlen.c, strnlen.h])
-
   dnl Persuade glibc <string.h> to declare strnlen().
-  AC_REQUIRE([AC_GNU_SOURCE])
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
+  AC_CHECK_DECLS_ONCE([strnlen])
+  if test $ac_cv_have_decl_strnlen = no; then
+    HAVE_DECL_STRNLEN=0
+  fi
 
   AC_FUNC_STRNLEN
   if test $ac_cv_func_strnlen_working = no; then
-    # This is necessary because automake-1.6.1 doens't understand
+    # This is necessary because automake-1.6.1 doesn't understand
     # that the above use of AC_FUNC_STRNLEN means we may have to use
     # lib/strnlen.c.
-    #AC_LIBOBJ(strnlen)
-    AC_DEFINE(strnlen, rpl_strnlen,
+    #AC_LIBOBJ([strnlen])
+    AC_DEFINE([strnlen], [rpl_strnlen],
       [Define to rpl_strnlen if the replacement function should be used.])
     gl_PREREQ_STRNLEN
   fi
 ])
 
 # Prerequisites of lib/strnlen.c.
-AC_DEFUN([gl_PREREQ_STRNLEN], [
-  AC_CHECK_DECLS_ONCE(strnlen)
-])
+AC_DEFUN([gl_PREREQ_STRNLEN], [:])