From 6d27631764c79245f1617b2dc86de94f9ada3da6 Mon Sep 17 00:00:00 2001
From: James Le Cuirot <chewi@aura-online.co.uk>
Date: Thu, 14 Mar 2019 20:19:55 +0000
Subject: [PATCH] Add USE_CCACHE option to CMake so that ccache can be forcibly
 disabled (#3661)

---
 CMakeLists.txt | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index cc39e773..3ca43f25 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -25,11 +25,14 @@ ELSE()
 ENDIF()
 
 # Early detect ccache
-find_program(CCACHE_PROGRAM ccache)
-if(CCACHE_PROGRAM)
-    # Support Unix Makefiles and Ninja
-    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE_PROGRAM}")
-    MESSAGE(STATUS "Found CCache ${CCACHE_PROGRAM}")
+OPTION(USE_CCACHE "Cache the build results with ccache" ON)
+if(USE_CCACHE)
+    find_program(CCACHE_PROGRAM ccache)
+    if(CCACHE_PROGRAM)
+        # Support Unix Makefiles and Ninja
+        set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE_PROGRAM}")
+        MESSAGE(STATUS "Found CCache ${CCACHE_PROGRAM}")
+    endif()
 endif()
 
 # A project name is needed for CPack