From a53b084e497a9f1629a2caada833ebe14a6838b7 Mon Sep 17 00:00:00 2001
From: John Crispin <john@openwrt.org>
Date: Wed, 6 Jun 2012 13:27:11 +0000
Subject: [PATCH] add ccache wrapper

SVN-Revision: 32075
---
 rules.mk                      |  8 ++++++--
 tools/ccache/Makefile         | 10 ++++++++++
 tools/ccache/files/ccache_cc  |  2 ++
 tools/ccache/files/ccache_cxx |  2 ++
 4 files changed, 20 insertions(+), 2 deletions(-)
 create mode 100755 tools/ccache/files/ccache_cc
 create mode 100755 tools/ccache/files/ccache_cxx

diff --git a/rules.mk b/rules.mk
index f6e748c4295..73a015e7a03 100644
--- a/rules.mk
+++ b/rules.mk
@@ -188,8 +188,12 @@ INSTALL_DATA:=install -m0644
 INSTALL_CONF:=install -m0600
 
 ifneq ($(CONFIG_CCACHE),)
-  TARGET_CC:= ccache $(TARGET_CC)
-  TARGET_CXX:= ccache $(TARGET_CXX)
+  TARGET_CC_NOCACHE:=$(TARGET_CC)
+  TARGET_CXX_NOCACHE:=$(TARGET_CXX)
+  export TARGET_CC_NOCACHE
+  export TARGET_CXX_NOCACHE
+  TARGET_CC:= ccache_cc
+  TARGET_CXX:= ccache_cxx
   HOSTCC:= ccache $(HOSTCC)
 endif
 
diff --git a/tools/ccache/Makefile b/tools/ccache/Makefile
index 9bc0b5901a5..8848fa5102b 100644
--- a/tools/ccache/Makefile
+++ b/tools/ccache/Makefile
@@ -17,6 +17,11 @@ PKG_CAT:=zcat
 
 include $(INCLUDE_DIR)/host-build.mk
 
+define Host/Install/ccache
+	$(INSTALL_DIR) $(STAGING_DIR_HOST)/bin/
+	$(CP) ./files/* $(STAGING_DIR_HOST)/bin/
+endef
+
 ifneq ($(strip $(shell which ccache >/dev/null && echo found)),found)
   define Host/Compile
 	$(MAKE) CC="$(HOSTCC_NOCACHE)" -C $(HOST_BUILD_DIR)
@@ -26,6 +31,10 @@ ifneq ($(strip $(shell which ccache >/dev/null && echo found)),found)
 	-$(MAKE) -C $(HOST_BUILD_DIR) uninstall
 	$(call Host/Clean/Default)
   endef
+  define Host/Install
+	$(call Host/Install/Default)
+	$(call Host/Install/ccache)
+  endef
 else
   define Host/Prepare
   endef
@@ -34,6 +43,7 @@ else
   define Host/Compile
   endef
   define Host/Install
+	$(call Host/Install/ccache)
   endef
   define Host/Clean
   endef
diff --git a/tools/ccache/files/ccache_cc b/tools/ccache/files/ccache_cc
new file mode 100755
index 00000000000..01c4ad42a21
--- /dev/null
+++ b/tools/ccache/files/ccache_cc
@@ -0,0 +1,2 @@
+#!/bin/sh
+exec ccache "${TARGET_CC_NOCACHE}" "$@"
diff --git a/tools/ccache/files/ccache_cxx b/tools/ccache/files/ccache_cxx
new file mode 100755
index 00000000000..cc60eb3a13c
--- /dev/null
+++ b/tools/ccache/files/ccache_cxx
@@ -0,0 +1,2 @@
+#!/bin/sh
+exec ccache "${TARGET_CXX_NOCACHE}" "$@"