From 039af49621dff40316e3a4a553a82cfb6bf9b96d Mon Sep 17 00:00:00 2001
From: Thomas White <taw@physics.org>
Date: Thu, 3 Jan 2019 11:14:12 +0100
Subject: Check for -fdiagnostics-color before using it

Needed for old gcc versions
---
 CMakeLists.txt | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'CMakeLists.txt')

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c6d5084b..22ed1fad 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -59,7 +59,11 @@ link_directories(${GTK_LIBRARY_DIRS})
 pkg_search_module(CAIRO cairo)
 pkg_search_module(GDKPIXBUF gdk-pixbuf-2.0)
 
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fdiagnostics-color=always")
+include(CheckCCompilerFlag)
+check_c_compiler_flag("-fdiagnostics-color=always" HAVE_DIAG_COLOR)
+if (HAVE_DIAG_COLOR)
+  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fdiagnostics-color=always")
+endif (HAVE_DIAG_COLOR)
 
 include_directories(${CMAKE_CURRENT_SOURCE_DIR})
 add_definitions(-DHAVE_CONFIG_H)
-- 
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