CCACHE_VERSION:=2.4
CCACHE_SOURCE:=ccache-$(CCACHE_VERSION).tar.gz
CCACHE_SITE:=http://samba.org/ftp/ccache
CCACHE_DIR:=$(TARGET_TOOLCHAIN_DIR)/ccache-$(CCACHE_VERSION)
CCACHE_BINARY:=ccache
CCACHE_TARGET_BINARY:=usr/bin/ccache


$(DL_DIR)/$(CCACHE_SOURCE):
	wget -P $(DL_DIR) $(CCACHE_SITE)/$(CCACHE_SOURCE)

$(CCACHE_DIR)/.unpacked: $(DL_DIR)/$(CCACHE_SOURCE)
	tar -C $(TARGET_TOOLCHAIN_DIR) $(VERBOSE) -xzf $(DL_DIR)/$(CCACHE_SOURCE)
	touch $@

$(CCACHE_DIR)/.patched: $(CCACHE_DIR)/.unpacked
	# WARNING - this will break if the toolchain is moved.
	# Should probably patch things to use a relative path.
	sed -i -e "s,getenv(\"CCACHE_PATH\"),\"$(TARGET_TOOLCHAIN_STAGING_DIR)/bin-ccache\",g" \
		$(CCACHE_DIR)/execute.c
	sed -i -e "s,getenv(\"CCACHE_DIR\"),\"$(TARGET_TOOLCHAIN_STAGING_DIR)/var/cache\",g" \
		$(CCACHE_DIR)/ccache.c
	touch $@

$(CCACHE_DIR)/.configured: $(CCACHE_DIR)/.patched
	( cd $(CCACHE_DIR); rm -f config.cache; \
		CC=$(HOSTCC) \
		./configure \
		--target=$(GNU_HOST_NAME) \
		--host=$(GNU_HOST_NAME) \
		--build=$(GNU_HOST_NAME) \
		--prefix=/usr \
	);
	touch $@

$(CCACHE_DIR)/$(CCACHE_BINARY): $(CCACHE_DIR)/.configured
	$(MAKE) CC=$(HOSTCC) -C $(CCACHE_DIR)

$(TARGET_TOOLCHAIN_STAGING_DIR)/$(CCACHE_TARGET_BINARY): $(CCACHE_DIR)/$(CCACHE_BINARY)
	mkdir -p $(TARGET_TOOLCHAIN_STAGING_DIR)/usr/bin
	mkdir -p $(TARGET_TOOLCHAIN_STAGING_DIR)/var/cache
	cp $(CCACHE_DIR)/$(CCACHE_BINARY) $(TARGET_TOOLCHAIN_STAGING_DIR)/$(CCACHE_TARGET_BINARY)
	# Keep the actual toolchain binaries in a directory at the same level.
	# Otherwise, relative paths for include dirs break.
	mkdir -p $(TARGET_TOOLCHAIN_STAGING_DIR)/bin-ccache
	if [ -f $(TARGET_TOOLCHAIN_STAGING_DIR)/bin/$(REAL_GNU_TARGET_NAME)-gcc ]; then \
		mv $(TARGET_TOOLCHAIN_STAGING_DIR)/bin/$(REAL_GNU_TARGET_NAME)-gcc \
		   $(TARGET_TOOLCHAIN_STAGING_DIR)/bin-ccache/; \
		( cd $(TARGET_TOOLCHAIN_STAGING_DIR)/bin-ccache; \
			ln -fs $(REAL_GNU_TARGET_NAME)-gcc $(GNU_TARGET_NAME)-gcc; \
			ln -fs $(REAL_GNU_TARGET_NAME)-gcc $(GNU_TARGET_NAME)-cc; \
			ln -fs $(REAL_GNU_TARGET_NAME)-gcc $(REAL_GNU_TARGET_NAME)-cc \
		); \
		( cd $(TARGET_TOOLCHAIN_STAGING_DIR)/bin; \
			ln -fs ../usr/bin/ccache $(GNU_TARGET_NAME)-cc; \
			ln -fs ../usr/bin/ccache $(GNU_TARGET_NAME)-gcc; \
			ln -fs ../usr/bin/ccache $(REAL_GNU_TARGET_NAME)-cc; \
			ln -fs ../usr/bin/ccache $(REAL_GNU_TARGET_NAME)-gcc \
		); \
	fi;
	if [ -f $(TARGET_TOOLCHAIN_STAGING_DIR)/bin/$(REAL_GNU_TARGET_NAME)-c++ ]; then \
		mv $(TARGET_TOOLCHAIN_STAGING_DIR)/bin/$(REAL_GNU_TARGET_NAME)-c++ \
		   $(TARGET_TOOLCHAIN_STAGING_DIR)/bin-ccache/; \
		( cd $(TARGET_TOOLCHAIN_STAGING_DIR)/bin-ccache; \
			ln -fs $(REAL_GNU_TARGET_NAME)-c++ $(GNU_TARGET_NAME)-c++; \
		); \
		( cd $(TARGET_TOOLCHAIN_STAGING_DIR)/bin; \
			ln -fs ../usr/bin/ccache $(GNU_TARGET_NAME)-c++; \
			ln -fs ../usr/bin/ccache $(REAL_GNU_TARGET_NAME)-c++; \
		); \
	fi;
	if [ -f $(TARGET_TOOLCHAIN_STAGING_DIR)/bin/$(REAL_GNU_TARGET_NAME)-g++ ]; then \
		mv $(TARGET_TOOLCHAIN_STAGING_DIR)/bin/$(REAL_GNU_TARGET_NAME)-g++ \
		   $(TARGET_TOOLCHAIN_STAGING_DIR)/bin-ccache/; \
		( cd $(TARGET_TOOLCHAIN_STAGING_DIR)/bin-ccache; \
			ln -fs $(REAL_GNU_TARGET_NAME)-g++ $(GNU_TARGET_NAME)-g++; \
		); \
		( cd $(TARGET_TOOLCHAIN_STAGING_DIR)/bin; \
			ln -fs ../usr/bin/ccache $(GNU_TARGET_NAME)-g++; \
			ln -fs ../usr/bin/ccache $(REAL_GNU_TARGET_NAME)-g++; \
		); \
	fi;

ccache: gcc $(TARGET_TOOLCHAIN_STAGING_DIR)/$(CCACHE_TARGET_BINARY)

.PHONY: ccache