--- a/ChangeLog	Sun May 20 01:19:30 2018 +0200
+++ b/ChangeLog	Sat May 19 17:07:34 2018 +0200
@@ -1,3 +1,9 @@
+2018-05-19  Bruno Haible  <bruno@clisp.org>
+
+	localcharset: Add a manual test.
+	* tests/test-localcharset.c: New file.
+	* modules/localcharset-tests: New file.
+
 2018-05-19  Bruno Haible  <bruno@clisp.org>
 
 	localcharset: Remove support for obsolete platforms.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/localcharset-tests	Sat May 19 17:07:34 2018 +0200
@@ -0,0 +1,9 @@
+Files:
+tests/test-localcharset.c
+
+Depends-on:
+
+configure.ac:
+
+Makefile.am:
+noinst_PROGRAMS += test-localcharset

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-localcharset.c	Sat May 19 17:07:34 2018 +0200
@@ -0,0 +1,39 @@
+/* Manual test of localcharset() function.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* This program prints the result of locale_charset in the current locale.
+   One way to use it is:
+     $ for l in `locale -a`; do
+         echo -n "$l               "; LANG=$l ./test-localcharset;
+       done \
+       | sort -k 2
+ */
+
+#include <config.h>
+
+#include "localcharset.h"
+
+#include <locale.h>
+#include <stdio.h>
+
+int
+main (void)
+{
+  setlocale (LC_ALL, "");
+  printf ("%s\n", locale_charset ());
+
+  return 0;
+}