From c8bb2a35850be7c6eaec5ad5a2936a77f7913de2 Mon Sep 17 00:00:00 2001
From: Albrecht Schlosser <albrechts.fltk@online.de>
Date: Tue, 21 Dec 2021 01:48:14 +0100
Subject: [PATCH] Add header guards to source files of FL/fl_config.h

There are two "source files", one for configure and one for CMake,
respectively.
---
 fl_config.cmake.in | 5 +++++
 fl_config.in       | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/fl_config.cmake.in b/fl_config.cmake.in
index 3e321e9f7..1a83890dc 100644
--- a/fl_config.cmake.in
+++ b/fl_config.cmake.in
@@ -1,3 +1,4 @@
+/* FL/fl_config.h.  Generated from fl_config.cmake.in by CMake.  */
 /*
  * Build configuration file for the Fast Light Tool Kit (FLTK).
  *
@@ -14,6 +15,8 @@
  *     https://www.fltk.org/bugs.php
  */
 
+#ifndef _FL_fl_config_h_
+#define _FL_fl_config_h_
 
 /*
  * FL_ABI_VERSION (ABI version):
@@ -51,3 +54,5 @@
  */
 
 #cmakedefine FLTK_USE_X11 1
+
+#endif /* _FL_fl_config_h_ */
diff --git a/fl_config.in b/fl_config.in
index 5a2590111..477f91f28 100644
--- a/fl_config.in
+++ b/fl_config.in
@@ -14,6 +14,8 @@
  *     https://www.fltk.org/bugs.php
  */
 
+#ifndef _FL_fl_config_h_
+#define _FL_fl_config_h_
 
 /*
  * FL_ABI_VERSION (ABI version)
@@ -51,3 +53,5 @@
  */
 
 #undef FLTK_USE_X11
+
+#endif /* _FL_fl_config_h_ */