- use separate ccache directory for each crosstool

make/clean.mk

@@ -28,4 +28,8 @@ clean-all:
 	make staging-clean
 	make clean
 
+ccache-clean:
+	@echo "Clearing $$CCACHE_DIR"
+	@$(CCACHE) -C
+
 PHONY += rebuild-clean all-clean pkg-clean

make/crosstool.mk

@@ -7,8 +7,9 @@ crosstools:
 	make crosstool-arm-hd2 BOXSERIES=hd2
 
 crosstools-renew:
-	ccache -cCz
+	make ccache-clean BOXSERIES=hd1
 	rm -rf $(BASE_DIR)/cross/$(BOXARCH)/hd1
+	make ccache-clean BOXSERIES=hd2
 	rm -rf $(BASE_DIR)/cross/$(BOXARCH)/hd2
 	rm -rf $(HOSTPREFIX)/bin/arm-*
 	rm -rf $(HOSTPREFIX)/bin/pkg-config

make/environment.mk

@@ -130,6 +130,8 @@ TARGETLIB     = $(TARGETPREFIX)/lib
 TARGETINCLUDE = $(TARGETPREFIX)/include
 BUILD        ?= $(shell /usr/share/libtool/config.guess 2>/dev/null || /usr/share/libtool/config/config.guess 2>/dev/null || /usr/share/misc/config.guess)
 CCACHE        = /usr/bin/ccache
+CCACHE_DIR    = $(HOME)/.ccache-ni-buildsystem-$(BOXARCH)-$(BOXSERIES)
+export CCACHE_DIR
 
 # create debug image
 DEBUG ?= no