chown: Update doc regarding AIX.

[gnulib.git] / m4 / strsep.m4

diff --git a/m4/strsep.m4 b/m4/strsep.m4
index 40a087b..fb4d396 100644 (file)
--- a/m4/strsep.m4
+++ b/m4/strsep.m4
@@ -1,5 +1,6 @@
-# strsep.m4 serial 3
-dnl Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+# strsep.m4 serial 9
+dnl Copyright (C) 2002, 2003, 2004, 2007, 2009, 2010 Free Software Foundation,
+dnl 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.
@@ -7,10 +8,17 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_STRSEP],
 [
   dnl Persuade glibc <string.h> to declare strsep().
-  AC_REQUIRE([AC_GNU_SOURCE])
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
 
-  AC_REPLACE_FUNCS(strsep)
-  gl_PREREQ_STRSEP
+  dnl The strsep() declaration in lib/string.in.h uses 'restrict'.
+  AC_REQUIRE([AC_C_RESTRICT])
+
+  AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
+  AC_REPLACE_FUNCS([strsep])
+  if test $ac_cv_func_strsep = no; then
+    HAVE_STRSEP=0
+    gl_PREREQ_STRSEP
+  fi
 ])
 
 # Prerequisites of lib/strsep.c.