#!/usr/bin/make -f
#

WEEK := $(shell date +%Y%W)
RELEASE := $(shell dpkg-parsechangelog | awk '/^Version: / { print $$2 }')
REVISION := $(shell echo "$(RELEASE)" | sed 's/\(.*\)-maemo\(.*\)/.10bfs\2/')
EXTRAVERSION := EXTRAVERSION=-bfs4

PACKAGE := kernel
FLASHER_PACKAGE := kernel-bfs-flasher
#SOURCE_PACKAGE := $(PACKAGE)-source
KERNEL_PACKAGE := $(PACKAGE)-bfs
BOOTIMG_PACKAGE := $(PACKAGE)-bfs-bootimg
MODULES_PACKAGE := $(PACKAGE)-bfs-modules
HEADERS_PACKAGE := $(PACKAGE)-bfs-headers
KBUILD_PACKAGE := $(PACKAGE)-bfs-kbuild
LIBC_PACKAGE := linux-kernel-bfs-headers

BUILDTMP := $(CURDIR)/debian/build
#KSRC := $(BUILDTMP)/$(PACKAGE)
KSRC := $(CURDIR)
export KBUILD_OUTPUT = $(BUILDTMP)

DEFCONFIG := rx51power_defconfig
KVER = $(shell cat $(BUILDTMP)/include/config/kernel.release 2> /dev/null)
ARCH = $(shell dpkg-architecture -qDEB_HOST_ARCH_CPU)
INCLUDE_HEADERS_ARCH = asm-$(ARCH) config linux
INCLUDE_HEADERS = asm-$(ARCH) linux acpi asm-generic crypto drm Kbuild keys math-emu media mtd net pcmcia rdma rxrpc scsi sound video xen
RM_SCRIPTS = bloat-o-meter show_delta
DEBUG_MODULES = oprofile.ko
MAKE += $(MAKEFLAGS)

ifneq (,$(findstring parallel,$(DEB_BUILD_OPTIONS)))
    PARALLEL_JOBS := $(shell echo $(DEB_BUILD_OPTIONS) | \
        sed -e 's/.*parallel=\([0-9]\+\).*/\1/')
    ifeq ($(DEB_BUILD_OPTIONS),$(PARALLEL_JOBS))
        PARALLEL_JOBS := $(shell if [ -f /proc/cpuinfo ]; \
            then echo `cat /proc/cpuinfo | grep 'processor' | wc -l`; \
            else echo 1; fi)
    endif
    NJOBS := -j$(PARALLEL_JOBS)
endif

configure-stamp:
	dh_testdir
	#$(MAKE) mrproper KBUILD_OUTPUT=$(CURDIR)
	mkdir -p $(BUILDTMP)
	$(MAKE) clean
	QUILT_PATCHES=debian/patches quilt push -a -q || test $$? = 2
	cp debian/$(DEFCONFIG) arch/arm/configs/

	uudecode debian/u-boot.bin.gz.b64 -o - | gunzip -dc > debian/u-boot.bin
	dd if=debian/u-boot.bin of=debian/u-boot.pad bs=262144 count=1 conv=sync
	cd $(KSRC) && $(MAKE) $(EXTRAVERSION) $(DEFCONFIG)
	touch $@

kernel-stamp: configure-stamp
	echo "compile $(PRODUCT) kernel"
	cd $(KSRC) && $(MAKE) $(NJOBS) $(EXTRAVERSION) zImage
	mkimage  -A arm -O linux -T kernel -C none -a 80008000 -e 80008000 -n kernel-bfs -d $(BUILDTMP)/arch/arm/boot/zImage $(BUILDTMP)/arch/arm/boot/uImage
	#cat /usr/lib/u-boot/u-boot.bin.0x38000/u-boot.bin.0x38000 $(BUILDTMP)/arch/arm/boot/uImage > debian/uImage
	cat debian/u-boot.pad $(BUILDTMP)/arch/arm/boot/uImage > debian/uImage
	touch $@

modules-stamp: configure-stamp
	echo "compile $(PRODUCT) kernel modules"
	cd $(KSRC) && $(MAKE) $(NJOBS) $(EXTRAVERSION) modules
	$(MAKE) -C $(KSRC) M=debian/joikuspot EXTRAVERSION=$(EXTRAVERSION) modules
	touch $@

modules-extra: configure-stamp
	echo "compile $(PRODUCT) kernel EXTRA modules"
	cd $(KSRC) && \
	patch -p1 < $(CURDIR)/debian/modules-extra_config.patch && \
	$(MAKE) $(EXTRAVERSION) oldconfig modules && \
	patch -p1 -R < $(CURDIR)/debian/modules-extra_config.patch && \
	$(MAKE) $(EXTRAVERSION) oldconfig

headers: kernel-stamp modules-stamp

clean-gen:
	dh_testdir
	dh_testroot

	mkdir -p $(BUILDTMP)
	$(MAKE) mrproper
	-rm -f scripts/basic/{docproc,fixdep,hash} scripts/kconfig/mconf scripts/kconfig/*.o scripts/kconfig/lxdialog/*.o
	rm -f modules/modversions.h modules/ksyms.ver debian/files conf.vars scripts/cramfs/cramfsck \
		scripts/cramfs/mkcramfs applied_patches debian/buildinfo stamp-* .config* \
		debian/$(FLASHER_PACKAGE).postinst debian/$(MODULES_PACKAGE).postinst debian/$(MODULES_PACKAGE).postrm
	rm -rf debian/tmp-*
	rm -rf debian/build
	rm -f *-stamp
	-rm debian/u-boot.bin debian/u-boot.pad debian/uImage

clean: clean-gen
	QUILT_PATCHES=debian/patches quilt pop -a -q -R || test $$? = 2
	-rm arch/arm/configs/$(DEFCONFIG)
	-rm -rf .pc

	dh_clean

install-kernel:
	dh_testdir
	dh_testroot
	dh_installdirs

	install -d -m 755 $(CURDIR)/debian/$(KERNEL_PACKAGE)/boot
	fiasco-gen -o $(CURDIR)/debian/$(KERNEL_PACKAGE)/boot/zImage-$(RELEASE).fiasco -g \
			-k debian/uImage -v $(RELEASE)
	#		-k $(BUILDTMP)/arch/arm/boot/zImage -v $(RELEASE)
	chmod 644 $(CURDIR)/debian/$(KERNEL_PACKAGE)/boot/zImage-$(RELEASE).fiasco

install-bootimg:
	dh_testdir
	dh_testroot
	dh_installdirs

	install -d -m 755 $(CURDIR)/debian/$(BOOTIMG_PACKAGE)/boot
	install -c -m 644 $(BUILDTMP)/arch/arm/boot/zImage $(CURDIR)/debian/$(BOOTIMG_PACKAGE)/boot/zImage-$(RELEASE)
	chmod 644 $(CURDIR)/debian/$(BOOTIMG_PACKAGE)/boot/zImage-$(RELEASE)

install-modules:
	dh_testdir
	dh_testroot

	mkdir -p $(CURDIR)/debian/$(MODULES_PACKAGE)/lib/modules/$(KVER)
	for f in $$(find $(BUILDTMP) -name "*.ko"); do \
		install -c -m 644 $$f $(CURDIR)/debian/$(MODULES_PACKAGE)/lib/modules/$(KVER)/$$(basename $$f); \
		strip --remove-section=.comment --remove-section=.note --strip-unneeded  $(CURDIR)/debian/$(MODULES_PACKAGE)/lib/modules/$(KVER)/$$(basename $$f); \
	done
	#ln -sf $(KVER) $(CURDIR)/debian/$(MODULES_PACKAGE)/lib/modules/current

install-headers:
	dh_testdir
	dh_testroot
	dh_installdirs

	install -d -m755 $(CURDIR)/debian/$(HEADERS_PACKAGE)/usr/src/$(HEADERS_PACKAGE)/
	install -p -o root -g root -m 644 $(BUILDTMP)/.config  $(CURDIR)/debian/$(HEADERS_PACKAGE)/usr/src/$(HEADERS_PACKAGE)/
	install -p -o root -g root -m 644 $(KSRC)/Makefile $(CURDIR)/debian/$(HEADERS_PACKAGE)/usr/src/$(HEADERS_PACKAGE)/
	install -p -o root -g root -m 644 $(BUILDTMP)/Module.symvers $(CURDIR)/debian/$(HEADERS_PACKAGE)/usr/src/$(HEADERS_PACKAGE)/
	cd $(BUILDTMP) && install -p -o root -g root -m 644 -D include/config/auto.conf \
		$(CURDIR)/debian/$(HEADERS_PACKAGE)/usr/src/$(HEADERS_PACKAGE)/include/config/auto.conf
	cd $(KSRC) && \
		find arch/$(ARCH) $(foreach dir,$(INCLUDE_HEADERS),include/$(dir)) -name '*.h' \
			-exec install -D -m644 {} $(CURDIR)/debian/$(HEADERS_PACKAGE)/usr/src/$(HEADERS_PACKAGE)/{} \;
	cd $(BUILDTMP) && \
		find $(foreach dir,$(INCLUDE_HEADERS_ARCH),include/$(dir)) -name '*.h' \
			-exec install -D -m644 {} $(CURDIR)/debian/$(HEADERS_PACKAGE)/usr/src/$(HEADERS_PACKAGE)/{} \;
	cd $(KSRC) && \
		find ./ -path "./debian" -prune -o -path "./.pc" -prune -o \( -name Makefile -or -name Kbuild -or -name Kconfig\* \) \
			-exec install -D -m644 {} $(CURDIR)/debian/$(HEADERS_PACKAGE)/usr/src/$(HEADERS_PACKAGE)/{} \;

	ln -sf asm-$(ARCH) $(CURDIR)/debian/$(HEADERS_PACKAGE)/usr/src/$(HEADERS_PACKAGE)/include/asm

	rm -rf $(CURDIR)/debian/$(HEADERS_PACKAGE)/usr/src/$(HEADERS_PACKAGE)/scripts
	ln -sf ../$(KBUILD_PACKAGE)/scripts $(CURDIR)/debian/$(HEADERS_PACKAGE)/usr/src/$(HEADERS_PACKAGE)

#	cp -a $(KSRC)/include/asm-$(ARCH)/arch \
#		$(CURDIR)/debian/$(HEADERS_PACKAGE)/usr/src/$(HEADERS_PACKAGE)/include/asm-$(ARCH)

	cp $(BUILDTMP)/arch/$(ARCH)/kernel/asm-offsets.s \
		$(CURDIR)/debian/$(HEADERS_PACKAGE)/usr/src/$(HEADERS_PACKAGE)/arch/$(ARCH)/kernel
#install /lib/modules symlink
	install -d -m 755 $(CURDIR)/debian/$(HEADERS_PACKAGE)/lib/modules/$(KVER)/
	ln -sf /usr/src/$(HEADERS_PACKAGE) $(CURDIR)/debian/$(HEADERS_PACKAGE)/lib/modules/$(KVER)/build
#install kbuild
	install -d $(CURDIR)/debian/$(HEADERS_PACKAGE)/usr/src/$(KBUILD_PACKAGE)
	cp -a $(KSRC)/scripts $(CURDIR)/debian/$(HEADERS_PACKAGE)/usr/src/$(KBUILD_PACKAGE)
	cp -a $(BUILDTMP)/scripts $(CURDIR)/debian/$(HEADERS_PACKAGE)/usr/src/$(KBUILD_PACKAGE)
#kbuild fixes
	cd $(CURDIR)/debian/$(HEADERS_PACKAGE)/usr/src/$(KBUILD_PACKAGE)/scripts && \
		( rm -f $(RM_SCRIPTS); chmod a-x mkcompile_h )
	find $(CURDIR)/debian/$(HEADERS_PACKAGE) -name ".gitignore" -exec rm {} \;

install-libc-headers:
	dh_testdir
	dh_testroot

	cd $(BUILDTMP) && \
	$(MAKE) headers_check ARCH=$(ARCH) && \
	$(MAKE) headers_install ARCH=$(ARCH) INSTALL_HDR_PATH=$(CURDIR)/debian/$(LIBC_PACKAGE)/usr


install-modules-extra:
	dh_testdir
	dh_testroot

	mkdir -p $(CURDIR)/debian/kernel-modules-extra/lib/modules/$(KVER)/extra
	for f in $(MODULES_EXTRA); do \
		install -c -m 644 $(BUILDTMP)/$$f \
			$(CURDIR)/debian/kernel-modules-extra/lib/modules/$(KVER)/extra/$$(basename $$f); \
	done

install-extra: install-modules-extra


install-arch: build-arch install-kernel install-bootimg install-modules install-headers install-libc-headers

ifeq ($(ARCH),arm)
build-arch: kernel-stamp modules-stamp headers
else
build-arch:
endif

build: build-arch 

binary-indep: #install-indep
	dh_testdir
	dh_testroot
	dh_installchangelogs -i
	dh_installdocs -i
	dh_installdeb -i
	dh_gencontrol -i
	dh_md5sums -i
	dh_builddeb -i

ifeq ($(ARCH),arm)
binary-arch: build-arch install-arch
else
binary-arch: install-libc-headers
endif
	sed \
		-e 's,@VERSION@,$(RELEASE),g' \
		-e 's,@KVER@,$(KVER),g' \
		< $(CURDIR)/debian/$(FLASHER_PACKAGE).postinst.in \
		> $(CURDIR)/debian/$(FLASHER_PACKAGE).postinst
	sed \
		-e 's,@KVER@,$(KVER),g' \
		< $(CURDIR)/debian/$(MODULES_PACKAGE).postinst.in \
		> $(CURDIR)/debian/$(MODULES_PACKAGE).postinst
	sed \
		-e 's,@KVER@,$(KVER),g' \
		< $(CURDIR)/debian/$(MODULES_PACKAGE).postrm.in \
		> $(CURDIR)/debian/$(MODULES_PACKAGE).postrm
	dh_testdir
	dh_testroot
	dh_installchangelogs -s
	dh_installdocs -s
	dh_install -s
ifeq ($(ARCH),arm)
	dh_strip -p$(HEADERS_PACKAGE)
endif
	dh_compress -s
	dh_fixperms -s --exclude /usr/src/kernel-headers
	dh_installdeb -s
	dh_shlibdeps -s
	dh_gencontrol -s
	dh_md5sums -s
	dh_builddeb -s
binary: binary-arch #binary-indep 
.PHONY: build clean binary-indep binary-arch binary install