From 459dd29444d048a67b1f05d2c8dbacdb6634a3b0 Mon Sep 17 00:00:00 2001
From: Renz Christian Bagaporo <renz@espressif.com>
Date: Mon, 6 May 2019 19:57:45 +0800
Subject: [PATCH] cmake: restore ccache use when present

Closes https://github.com/espressif/esp-idf/issues/3116
---
 tools/cmake/project.cmake | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/tools/cmake/project.cmake b/tools/cmake/project.cmake
index 034566e7fc..1bf088c3f8 100644
--- a/tools/cmake/project.cmake
+++ b/tools/cmake/project.cmake
@@ -83,6 +83,15 @@ macro(project name)
     # Now the configuration is loaded, set the toolchain appropriately
     idf_set_toolchain()
 
+    # Enable ccache if it's on the path
+    if(NOT CCACHE_DISABLE)
+        find_program(CCACHE_FOUND ccache)
+        if(CCACHE_FOUND)
+            message(STATUS "ccache will be used for faster builds")
+            set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ccache)
+        endif()
+    endif()
+
     __project(${name} C CXX ASM)
 
     set(IDF_BUILD_ARTIFACTS ON)