From b043dbde8450f19ebd13fc9a19f4643211eb32b9 Mon Sep 17 00:00:00 2001
From: Matthew <matt.phillips121@gmail.com>
Date: Mon, 10 Feb 2020 11:00:51 +1100
Subject: [PATCH] Add ccache to the clang builds

Ccache increases compilation speeds dramatically
Add this to the clang toolchain
---
 llvm.cmake | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/llvm.cmake b/llvm.cmake
index 33dd76e99..87e42cb51 100644
--- a/llvm.cmake
+++ b/llvm.cmake
@@ -46,3 +46,12 @@ set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
 set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
 
 mark_as_advanced(FORCE CMAKE_TOOLCHAIN_FILE)
+
+find_program(CCACHE ccache)
+if(NOT ("${CCACHE}" STREQUAL CCACHE-NOTFOUND))
+    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ${CCACHE})
+    set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ${CCACHE})
+endif()
+mark_as_advanced(CCACHE)
+
+