Add support to build with ccache in the build system

Signed-off-by: Patrick Georgi <patrick.georgi@coresystems.de>
Acked-by: Stefan Reinauer <stepan@coresystems.de>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5297 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

Makefile

@@ -61,6 +61,7 @@ endif
 endif
 
 CPP:= $(CC) -x assembler-with-cpp -DASSEMBLY -E
+ROMCC:= $(obj)/romcc
 HOSTCC = gcc
 HOSTCXX = g++
 HOSTCFLAGS := -I$(srck) -I$(objk) -g
@@ -85,6 +86,17 @@ HOSTCC:=clang
 endif
 endif
 
+ifeq ($(CONFIG_CCACHE),y)
+CCACHE:=CCACHE_COMPILERCHECK=content $(wildcard $(addsuffix /ccache,$(subst :, ,$(PATH))))
+ifeq ($(CCACHE),)
+$(error ccache selected, but not found in PATH)
+endif
+CC := $(CCACHE) $(CC)
+HOSTCC := $(CCACHE) $(HOSTCC)
+HOSTCXX := $(CCACHE) $(HOSTCXX)
+ROMCC := $(CCACHE) $(ROMCC)
+endif
+
 strip_quotes = $(subst ",,$(subst \",,$(1)))
 
 ARCHDIR-$(CONFIG_ARCH_X86)    := i386

src/Kconfig

@@ -62,6 +62,7 @@ endchoice
 config SCANBUILD_ENABLE
 	bool "Build with scan-build for static analysis"
 	default n
+	depends on !CCACHE
 	help
 	  Changes the build process to scan-build is used.
 	  Requires scan-build in path.
@@ -73,6 +74,13 @@ config SCANBUILD_REPORT_LOCATION
 	help
 	  Where the scan-build report should be stored
 
+config CCACHE
+	bool "ccache"
+	default n
+	help
+	  Enables the use of ccache for faster builds.
+	  Requires ccache in path.
+
 endmenu
 
 source src/mainboard/Kconfig

src/arch/i386/Makefile.bootblock.inc

@@ -71,7 +71,7 @@ $(obj)/mainboard/$(MAINBOARDDIR)/bootblock.inc: $(src)/arch/i386/init/$(subst ",
 	@printf "    ROMCC      $(subst $(obj)/,,$(@))\n"
 	$(CC) -MM -MT$(obj)/mainboard/$(MAINBOARDDIR)/bootblock.inc \
 		$< > $(obj)/mainboard/$(MAINBOARDDIR)/bootblock.inc.d
-	$(obj)/romcc $(bootblock_romccflags) $(ROMCCFLAGS) $(INCLUDES) $< -o $@
+	$(ROMCC) -c -S $(bootblock_romccflags) $(ROMCCFLAGS) -I. $(INCLUDES) $< -o $@
 
 $(obj)/bootblock.elf: $(obj)/mainboard/$(MAINBOARDDIR)/bootblock.o $(obj)/bootblock/ldscript.ld
 	@printf "    LINK       $(subst $(obj)/,,$(@))\n"

src/arch/i386/Makefile.inc

@@ -195,7 +195,7 @@ ROMCCFLAGS ?= -mcpu=p2 -O2
 
 $(obj)/mainboard/$(MAINBOARDDIR)/romstage.inc: $(src)/mainboard/$(MAINBOARDDIR)/romstage.c $(obj)/romcc $(OPTION_TABLE_H) $(obj)/build.h
 	printf "    ROMCC      romstage.inc\n"
-	$(obj)/romcc $(ROMCCFLAGS) -include $(obj)/build.h $(INCLUDES) $< -o $@
+	$(ROMCC) -c -S $(ROMCCFLAGS) -include $(obj)/build.h -I. $(INCLUDES) $< -o $@
 
 else
 

util/abuild/abuild

@@ -55,6 +55,9 @@ silent=
 # clang mode enabled by -sb option.
 scanbuild=false
 
+# use ccache
+ccache=false
+
 # stackprotect mode enabled by -ns option.
 stackprotect=false
 
@@ -174,6 +177,11 @@ function create_config
 			echo "CONFIG_DEFAULT_CONSOLE_LOGLEVEL=$loglevel" >> .config
 		fi
 
+		if [ "$ccache" = "true" ]; then
+			printf "(ccache enabled) "
+			echo "CONFIG_CCACHE=y" >> .config
+		fi
+
 		if [ "$scanbuild" = "true" ]; then
 			printf "(scan-build enabled) "
 			echo "CONFIG_SCANBUILD_ENABLE=y" >> .config
@@ -495,6 +503,7 @@ function myhelp
 	printf "    [-s|--silent]                 omit compiler calls in logs\n"
 	printf "    [-ns|--nostackprotect]        use gcc -fno-stack-protector option\n"
 	printf "    [-sb|--scan-build]            use clang's static analyzer\n"
+	printf "    [-y|--ccache]                 use ccache\n"
 	printf "    [-C|--config]                 configure-only mode\n"
 	printf "    [-l|--loglevel <num>]         set loglevel\n"
 	printf "    [lbroot]			  absolute path to coreboot sources\n"
@@ -530,11 +539,11 @@ test "$ROOT" = "" && ROOT=$( cd ../..; pwd )
 getoptbrand="`getopt -V`"
 if [ "${getoptbrand:0:6}" == "getopt" ]; then
 	# Detected GNU getopt that supports long options.
-	args=`getopt -l version,verbose,help,all,target:,broken,payloads:,test,cpus:,silent,xml,config,loglevel: Vvhat:bp:Tc:sxCl: -- "$@"`
+	args=`getopt -l version,verbose,help,all,target:,broken,payloads:,test,cpus:,silent,xml,config,loglevel:,ccache Vvhat:bp:Tc:sxCl:y -- "$@"`
 	eval set "$args"
 else
 	# Detected non-GNU getopt
-	args=`getopt Vvhat:bp:Tc:sxCl:o $*`
+	args=`getopt Vvhat:bp:Tc:sxCl:y $*`
 	set -- $args
 fi
 
@@ -559,6 +568,7 @@ while true ; do
 		-s|--silent)    shift; silent="-s";;
 		-ns|--nostackprotect) shift; stackprotect=true;;
 		-sb|--scan-build) shift; scanbuild=true;;
+		-y|--ccache)    shift; ccache=true;;
 		-C|--config)    shift; configureonly=1;;
 		-l|--loglevel)  shift; loglevel="$1"; shift;;
 		--)		shift; break;;

util/romcc/romcc.c

@@ -24968,10 +24968,14 @@ static void compile(const char *filename,
 	state.errout = stderr;
 	state.dbgout = stdout;
 	/* Remember the output filename */
-	state.output    = fopen(state.compiler->ofilename, "w");
-	if (!state.output) {
-		error(&state, 0, "Cannot open output file %s\n",
-			state.compiler->ofilename);
+	if ((state.compiler->flags & COMPILER_PP_ONLY) && (strcmp("auto.inc",state.compiler->ofilename) == 0)) {
+		state.output    = stdout;
+	} else {
+		state.output    = fopen(state.compiler->ofilename, "w");
+		if (!state.output) {
+			error(&state, 0, "Cannot open output file %s\n",
+				state.compiler->ofilename);
+		}
 	}
 	/* Make certain a good cleanup happens */
 	exit_state = &state;
@@ -25146,6 +25150,12 @@ int main(int argc, char **argv)
 			else if (strncmp(argv[1], "-m", 2) == 0) {
 				result = arch_encode_flag(&arch, argv[1]+2);
 			}
+			else if (strncmp(argv[1], "-c", 2) == 0) {
+				result = 0;
+			}
+			else if (strncmp(argv[1], "-S", 2) == 0) {
+				result = 0;
+			}
 			else if (strncmp(argv[1], "-include", 10) == 0) {
 				struct filelist *old_head = include_filelist;
 				include_filelist = malloc(sizeof(struct filelist));