build: improve ccache support

[openwrt/openwrt.git] / rules.mk

diff --git a/rules.mk b/rules.mk
index 66ddea288306e1a89f3b5588050a9469e94efe2a..e734b4a582939cb192724f931d2b1492eb3d85bb 100644 (file)
--- a/rules.mk
+++ b/rules.mk
@@ -298,6 +298,9 @@ ifneq ($(CONFIG_CCACHE),)
   TARGET_CXX:= ccache_cxx
   HOSTCC:= ccache $(HOSTCC)
   HOSTCXX:= ccache $(HOSTCXX)
+  export CCACHE_BASEDIR:=$(TOPDIR)
+  export CCACHE_DIR:=$(if $(call qstrip,$(CONFIG_CCACHE_DIR)),$(call qstrip,$(CONFIG_CCACHE_DIR)),$(TOPDIR)/.ccache)
+  export CCACHE_COMPILERCHECK:=%compiler% -dumpmachine; %compiler% -dumpversion
 endif
 
 TARGET_CONFIGURE_OPTS = \