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-rw-r--r--src/flstring.h11
1 files changed, 10 insertions, 1 deletions
diff --git a/src/flstring.h b/src/flstring.h
index da242b3d4..3dc75165e 100644
--- a/src/flstring.h
+++ b/src/flstring.h
@@ -2,8 +2,9 @@
* "$Id$"
*
* Common string header file for the Fast Light Tool Kit (FLTK).
+ * Internal use only (see "important note" below).
*
- * Copyright 1998-2018 by Bill Spitzak and others.
+ * Copyright 1998-2020 by Bill Spitzak and others.
*
* This library is free software. Distribution and use rights are outlined in
* the file "COPYING" which should have been included with this file. If this
@@ -16,6 +17,14 @@
* http://www.fltk.org/str.php
*/
+ /*
+ * Important note: this header file includes '<config.h>' !
+ *
+ * This header MUST NOT be included in public headers (i.e. in 'FL/') and
+ * SHOULD NOT be included in test and demo programs (i.e. in 'test/' or
+ * 'examples/') because it includes '<config.h>'.
+ */
+
#ifndef flstring_h
# define flstring_h