support using ccache within the target system

make/ccache.mk

@@ -0,0 +1,70 @@
+#############################################################
+#
+# build ccache to make recompiles faster on the build system
+#
+#############################################################
+CCACHE_SITE:=http://ccache.samba.org/ftp/ccache
+CCACHE_SOURCE:=ccache-2.3.tar.gz
+CCACHE_DIR:=$(TOOL_BUILD_DIR)/ccache-2.3
+CCACHE_DIR2:=$(BUILD_DIR)/ccache-2.3
+CCACHE_CAT:=zcat
+CCACHE_BINARY:=ccache
+CCACHE_TARGET_BINARY:=usr/bin/ccache
+
+CCACHE_DIR1:=$(TOOL_BUILD_DIR)/ccache-build
+$(DL_DIR)/$(CCACHE_SOURCE):
+	$(WGET) -P $(DL_DIR) $(CCACHE_SITE)/$(CCACHE_SOURCE)
+
+$(CCACHE_DIR)/.unpacked: $(DL_DIR)/$(CCACHE_SOURCE)
+	$(CCACHE_CAT) $(DL_DIR)/$(CCACHE_SOURCE) | tar -C $(TOOL_BUILD_DIR) -xvf -
+	touch $(CCACHE_DIR)/.unpacked
+
+$(CCACHE_DIR)/.patched: $(CCACHE_DIR)/.unpacked
+	touch $(CCACHE_DIR)/.patched
+
+$(CCACHE_DIR2)/.configured: $(CCACHE_DIR)/.patched
+	mkdir -p $(CCACHE_DIR2)
+	(cd $(CCACHE_DIR2); rm -rf config.cache; \
+		$(TARGET_CONFIGURE_OPTS) \
+		$(CCACHE_DIR)/configure \
+		--target=$(GNU_TARGET_NAME) \
+		--host=$(GNU_TARGET_NAME) \
+		--build=$(GNU_HOST_NAME) \
+		--prefix=/usr \
+		--exec-prefix=/usr \
+		--bindir=/usr/bin \
+		--sbindir=/usr/sbin \
+		--libexecdir=/usr/lib \
+		--sysconfdir=/etc \
+		--datadir=/usr/share \
+		--localstatedir=/var \
+		--mandir=/usr/man \
+		--infodir=/usr/info \
+		$(DISABLE_NLS) \
+	);
+	touch $(CCACHE_DIR2)/.configured
+
+$(CCACHE_DIR2)/$(CCACHE_BINARY): $(CCACHE_DIR2)/.configured
+	$(MAKE) -C $(CCACHE_DIR2)
+
+$(TARGET_DIR)/$(CCACHE_TARGET_BINARY): $(CCACHE_DIR2)/$(CCACHE_BINARY)
+	$(MAKE) DESTDIR=$(TARGET_DIR) -C $(CCACHE_DIR2) install
+	rm -rf $(TARGET_DIR)/share/locale $(TARGET_DIR)/usr/info \
+		$(TARGET_DIR)/usr/man $(TARGET_DIR)/usr/share/doc
+	# put a bunch of symlinks into /bin, since that is earlier
+	# in the default PATH than /usr/bin where gcc lives
+	(cd $(TARGET_DIR)/bin; \
+		ln -fs /usr/bin/ccache cc; \
+		ln -fs /usr/bin/ccache gcc; \
+		ln -fs /usr/bin/ccache c++; \
+		ln -fs /usr/bin/ccache g++;)
+
+ccache_target: uclibc $(TARGET_DIR)/$(CCACHE_TARGET_BINARY)
+
+ccache_target-clean:
+	$(MAKE) DESTDIR=$(TARGET_DIR) -C $(CCACHE_DIR2) uninstall
+	-$(MAKE) -C $(CCACHE_DIR2) clean
+
+ccache_target-dirclean:
+	rm -rf $(CCACHE_DIR2)
+