From 4627cc9c8f00860a1e845de27b8e81b6035ac0fd Mon Sep 17 00:00:00 2001
From: rusefi <rusefillc@gmail.com>
Date: Sat, 20 Apr 2019 21:44:00 -0400
Subject: [PATCH] Try ccache #769

---
 firmware/bootloader/src/Makefile | 11 +++++++++--
 unit_tests/Makefile              | 11 +++++++++--
 2 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/firmware/bootloader/src/Makefile b/firmware/bootloader/src/Makefile
index 4d4938f796..fafb81e920 100644
--- a/firmware/bootloader/src/Makefile
+++ b/firmware/bootloader/src/Makefile
@@ -41,6 +41,13 @@ ifeq ($(USE_LINK_GC),)
   USE_LINK_GC = yes
 endif
 
+ifeq ($(CCACHE_DIR),)
+ $(info No CCACHE_DIR)
+else
+ $(info CCACHE_DIR is ${CCACHE_DIR})
+ CCPREFIX=ccache
+endif
+
 # Linker extra options here.
 ifeq ($(USE_LDOPT),)
   USE_LDOPT =
@@ -274,8 +281,8 @@ MCU  = cortex-m4
 
 #TRGT = arm-elf-
 TRGT = arm-none-eabi-
-CC   = $(TRGT)gcc
-CPPC = $(TRGT)g++
+CC   = $(CCPREFIX) $(TRGT)gcc
+CPPC = $(CCPREFIX) $(TRGT)g++
 # Enable loading with g++ only if you need C++ runtime support.
 # NOTE: You can use C++ even without C++ support if you are careful. C++
 #       runtime support makes code size explode.
diff --git a/unit_tests/Makefile b/unit_tests/Makefile
index fd9a24a4c8..592f451c3e 100644
--- a/unit_tests/Makefile
+++ b/unit_tests/Makefile
@@ -15,6 +15,13 @@ ifeq ($(USE_OPT),)
   USE_OPT = -c -Wall -O0 -ggdb -g3 -Werror=missing-field-initializers
 endif
 
+ifeq ($(CCACHE_DIR),)
+ $(info No CCACHE_DIR)
+else
+ $(info CCACHE_DIR is ${CCACHE_DIR})
+ CCPREFIX=ccache
+endif
+
 # C specific options here (added to USE_OPT).
 ifeq ($(USE_COPT),)
   USE_COPT = -std=gnu99 -fgnu89-inline
@@ -189,8 +196,8 @@ else
   TRGT = 
 endif
 
-CC   = $(TRGT)gcc
-CPPC = $(TRGT)g++
+CC   = $(CCPREFIX) $(TRGT)gcc
+CPPC = $(CCPREFIX) $(TRGT)g++
 # Enable loading with g++ only if you need C++ runtime support.
 # NOTE: You can use C++ even without C++ support if you are careful. C++
 #       runtime support makes code size explode.