[coreboot] Reliably build any Kconfig-based SeaBIOS revision

[Peter Stuge]

See patch.

The new TAG-stable points to the very latest commit in seabios.git,
which may not be quite right, but both stable and master must be
using Kconfig.


//Peter
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Reliably build arbitrary Kconfig-based revisions of SeaBIOS

The reliability is accomplished by checking out the user's desired SeaBIOS
tag into a branch named 'coreboot' in the local SeaBIOS git repository.
Thanks to the use of a branch TAG-$(CONFIG_SEABIOS_..) can refer to any
commitish at all in the SeaBIOS git repo.

Configuration is done by make defconfig followed by enabling of several
coreboot-specific Kconfig options for SeaBIOS using perl.

Signed-off-by: Peter Stuge <peter at stuge.se>

Index: src/arch/x86/Makefile.inc
===================================================================
--- src/arch/x86/Makefile.inc	(revision 6317)
+++ src/arch/x86/Makefile.inc	(working copy)
@@ -286,6 +286,7 @@
 
 seabios:
 	$(MAKE) -C payloads/external/SeaBIOS -f Makefile.inc \
+			HOSTCC="$(HOSTCC)" \
 			CC="$(CC)" LD="$(LD)" OBJDUMP="$(OBJDUMP)" \
 			OBJCOPY="$(OBJCOPY)" STRIP="$(STRIP)" \
 			CONFIG_SEABIOS_MASTER=$(CONFIG_SEABIOS_MASTER) \
Index: payloads/external/SeaBIOS/Makefile.inc
===================================================================
--- payloads/external/SeaBIOS/Makefile.inc	(revision 6317)
+++ payloads/external/SeaBIOS/Makefile.inc	(working copy)
@@ -1,31 +1,34 @@
 
 
 TAG-$(CONFIG_SEABIOS_MASTER)=origin/master
-TAG-$(CONFIG_SEABIOS_STABLE)=rel-0.6.1.3
+TAG-$(CONFIG_SEABIOS_STABLE)=42d977125110305704ad5794ba4da163faeed382
 
+unexport KCONFIG_AUTOCONFIG
+
 all: seabios
 
-seabios: patch
-	cd seabios; $(MAKE)
-
-patch: checkout
-	test -r seabios/.patched || \
-	perl -pi -e "s,#define CONFIG_COREBOOT 0,#define CONFIG_COREBOOT 1,;" \
-		 -e "s,#define CONFIG_DEBUG_SERIAL 0,#define CONFIG_DEBUG_SERIAL 1,;" \
-		 -e "s,#define CONFIG_VGAHOOKS 0,#define CONFIG_VGAHOOKS 1,;" \
-		 seabios/src/config.h
-	touch seabios/.patched
-
 checkout:
-	echo "Checking out SeaBIOS $(TAG-y)"
+	echo "    GIT        SeaBIOS $(TAG-y)"
 	test -d seabios && ( cd seabios; git fetch ) || \
-	git clone git://git.linuxtogo.org/home/kevin/seabios.git seabios
-	cd seabios; git checkout -m $(TAG-y)
+		git clone git://git.linuxtogo.org/home/kevin/seabios.git
+	cd seabios; git checkout master; git branch -D coreboot 2>/dev/null; git checkout -b coreboot $(TAG-y)
 
+config: checkout
+	echo "    CONFIG     SeaBIOS $(TAG-y)"
+	$(MAKE) -C seabios defconfig
+	perl -pi -e 's,.*CONFIG_COREBOOT.*,CONFIG_COREBOOT=y,;' \
+		 -e 's,.*CONFIG_DEBUG_SERIAL.*,CONFIG_DEBUG_SERIAL=y,;' \
+		 -e 's,.*CONFIG_VGAHOOKS.*,CONFIG_VGAHOOKS=y,;' \
+		 seabios/.config
+
+seabios: config
+	echo "    MAKE       SeaBIOS $(TAG-y)"
+	$(MAKE) -C seabios
+
 clean:
-	test -d seabios && (cd seabios; $(MAKE) clean) || exit 0
+	test -d seabios && $(MAKE) -C seabios clean || exit 0
 
 distclean:
 	rm -rf seabios
 
-.PHONY: seabios
+.PHONY: checkout config seabios clean distclean