warn-on-use: use instead of link-warning

[pspp] / m4 / strings_h.m4

diff --git a/m4/strings_h.m4 b/m4/strings_h.m4
index 135c16c02127e9b91c046c6ef1c3db2ad6305267..26aa1f782ac1a1c775ca44277cbbfe6f03185491 100644 (file)
--- a/m4/strings_h.m4
+++ b/m4/strings_h.m4
@@ -1,4 +1,5 @@
 # Configure a replacement for <string.h>.
+# serial 2
 
 # Copyright (C) 2007, 2009, 2010 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
@@ -16,6 +17,11 @@ AC_DEFUN([gl_HEADER_STRINGS_H_BODY],
 [
   AC_REQUIRE([gl_HEADER_STRINGS_H_DEFAULTS])
   gl_CHECK_NEXT_HEADERS([strings.h])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[#include <strings.h>
+    ]], [strcasecmp strncasecmp])
 ])
 
 AC_DEFUN([gl_STRINGS_MODULE_INDICATOR],