From 6e85b26367c514d08a180cdfa0e59b736998bcd5 Mon Sep 17 00:00:00 2001
From: Andre Puschmann <andre@softwareradiosystems.com>
Date: Wed, 27 Nov 2019 13:10:00 +0100
Subject: [PATCH] enable ccache if found on system

---
 CMakeLists.txt | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 24a6ca965..4a1a6f8dc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -96,6 +96,18 @@ endif(${CMAKE_SYSTEM_PROCESSOR} MATCHES "aarch64")
 # Find dependencies
 ########################################################################
 
+# Enable ccache if not already enabled
+find_program(CCACHE_EXECUTABLE ccache)
+mark_as_advanced(CCACHE_EXECUTABLE)
+if(CCACHE_EXECUTABLE)
+  foreach(LANG C CXX)
+    if(NOT DEFINED CMAKE_${LANG}_COMPILER_LAUNCHER AND NOT CMAKE_${LANG}_COMPILER MATCHES ".*/ccache$")
+      message(STATUS "Enabling ccache for ${LANG}")
+      set(CMAKE_${LANG}_COMPILER_LAUNCHER ${CCACHE_EXECUTABLE} CACHE STRING "")
+    endif()
+  endforeach()
+endif()
+
 # Threads
 find_package(Threads REQUIRED)