root/trunk/freewrt/mk/kernel-build.mk

# $FreeWRT$
#-
# This file is part of the FreeWRT project. FreeWRT is copyrighted
# material, please see the LICENCE file in the top-level directory
# or at http://www.freewrt.org/licence for details.

DISTFILES:=     linux-$(LINUX_VERSION).tar.bz2
MASTER_SITES=   http://www.us.kernel.org/pub/linux/kernel/v$(KERNEL)/ \
                http://www.us.kernel.org/pub/linux/kernel/v$(KERNEL)/ \
                http://www.kernel.org/pub/linux/kernel/v$(KERNEL)/ \
                http://www.de.kernel.org/pub/linux/kernel/v$(KERNEL)/
PKG_MD5SUM:=    ${LINUX_KERNEL_MD5SUM}

include ${TOPDIR}/mk/buildhlp.mk

KERNEL_IDIR:=$(LINUX_BUILD_DIR)/kernel-ipkg

# applying kernel patches:
# 0. cwd is target/linux/${BOARD}
# 1. if ../generic-${KERNEL} (i.e. generic-2.4 or generic-2.6) exists,
#    apply patches from there
# 2. if ../generic-${UNAME_R} (i.e. e.g. generic-2.6.23.12) exists,
#    apply patches from there
# 3. if ./patches (vendor-specific stuff) exists, apply contained patches
# 4. if ./${DEVICE}/patches (device-specific stuff) exists, apply the patches

$(LINUX_BUILD_DIR)/.extract: ${_CHECKSUM_COOKIE}
        $(TRACE) target/linux/$(BOARD)-$(KERNEL)-kernel-prepare
        test ! -e ${LINUX_BUILD_DIR}/linux-${LINUX_VERSION}/Rules.make || \
            rm -rf ${LINUX_BUILD_DIR}
        -mkdir -p $(LINUX_BUILD_DIR)
        bzcat ${FULLDISTFILES} | (cd $(LINUX_BUILD_DIR); tar xf - )
        rm -f $(BUILD_DIR)/linux
        ln -s $(LINUX_BUILD_DIR)/linux-$(LINUX_VERSION) $(BUILD_DIR)/linux
        $(TRACE) target/linux/$(BOARD)-$(KERNEL)-kernel-patch
        -[[ -d extra ]] && cd extra && mirpax -rw . ${LINUX_DIR}/
        -[ -d ../generic-$(KERNEL)/patches ] && $(PATCH) $(LINUX_DIR) ../generic-$(KERNEL)/patches $(MAKE_TRACE)
        -[ -d ../generic-${UNAME_R}/patches ] && $(PATCH) $(LINUX_DIR) ../generic-${UNAME_R}/patches $(MAKE_TRACE)
        -[ -d ./patches ] && $(PATCH) $(LINUX_DIR) ./patches $(MAKE_TRACE)
        -[ -d ./$(DEVICE)/patches ] && $(PATCH) $(LINUX_DIR) ./$(DEVICE)/patches $(MAKE_TRACE)
        touch $@

MAKEJOBS:=
ifneq (${FWRT_MAKE_PARALLEL_KERNEL},)
MAKEJOBS:=      -j${FWRT_MAKE_JOBS}
endif

$(LINUX_DIR)/.config: $(LINUX_BUILD_DIR)/.extract $(BUILD_DIR)/.fwrtkernelconfig
        $(TRACE) target/linux/$(BOARD)-$(KERNEL)-kernel-configure
        $(CP) $(BUILD_DIR)/.fwrtkernelconfig $(LINUX_DIR)/.config
ifneq ($(strip ${FWRT_INITRAMFS_SOURCE}),)
        cd ${TOPDIR} && zcat -f $(strip ${FWRT_INITRAMFS_SOURCE}) \
            >${LINUX_DIR}/fwrt-initramfs.cpio
        echo 'CONFIG_INITRAMFS_SOURCE="${LINUX_DIR}/fwrt-initramfs.cpio"' >>$@
else
        echo 'CONFIG_INITRAMFS_SOURCE=""' >>$@
endif
ifeq ($(KERNEL),2.4)
        $(SED) "s,^CROSS_COMPILE.*,CROSS_COMPILE=$(KERNEL_CROSS),g;" \
          $(LINUX_DIR)/Makefile  \
          $(LINUX_DIR)/arch/*/Makefile
        env GCC_HONOUR_COPTS=s $(MAKE) -C $(LINUX_DIR) ARCH=$(LINUX_KARCH) CC="$(TARGET_CC)" oldconfig include/linux/compile.h include/linux/version.h $(MAKE_TRACE)
        env GCC_HONOUR_COPTS=s $(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" ARCH=$(LINUX_KARCH) CC="$(TARGET_CC)" dep $(MAKE_TRACE)
else
        echo N | env GCC_HONOUR_COPTS=s $(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" ARCH=$(LINUX_KARCH) CC="$(TARGET_CC)" oldconfig $(MAKE_TRACE)
        env GCC_HONOUR_COPTS=s $(MAKE) -C $(LINUX_DIR) V=1 CROSS_COMPILE="$(KERNEL_CROSS)" ARCH=$(LINUX_KARCH) CC="$(TARGET_CC)" prepare scripts $(MAKE_TRACE) HOSTCFLAGS='-O2 -idirafter ${TOPDIR}/scripts'
endif
        touch -c $(LINUX_DIR)/.config

$(LINUX_DIR)/vmlinux: $(LINUX_DIR)/.config
        $(TRACE) target/linux/$(BOARD)-$(KERNEL)-kernel-compile
        env GCC_HONOUR_COPTS=s $(MAKE) -C $(LINUX_DIR) V=1 ${MAKEJOBS} CROSS_COMPILE="$(KERNEL_CROSS)" ARCH=$(LINUX_KARCH) CC="$(TARGET_CC)" $(MAKE_TRACE) HOSTCFLAGS='-O2 -idirafter ${TOPDIR}/scripts'
        $(TRACE) target/linux/$(BOARD)-$(KERNEL)-modules-compile
        env GCC_HONOUR_COPTS=s $(MAKE) -C "$(LINUX_DIR)" V=1 ${MAKEJOBS} CROSS_COMPILE="$(KERNEL_CROSS)" ARCH=$(LINUX_KARCH) CC="$(TARGET_CC)" modules $(MAKE_TRACE) HOSTCFLAGS='-O2 -idirafter ${TOPDIR}/scripts'
        $(TRACE) target/linux/$(BOARD)-$(KERNEL)-modules-install
        rm -rf $(LINUX_BUILD_DIR)/modules
        env GCC_HONOUR_COPTS=s $(MAKE) -C "$(LINUX_DIR)" V=1 CROSS_COMPILE="$(KERNEL_CROSS)" DEPMOD=true INSTALL_MOD_PATH=$(LINUX_BUILD_DIR)/modules modules_install $(MAKE_TRACE) HOSTCFLAGS='-O2 -idirafter ${TOPDIR}/scripts'
        $(TRACE) target/linux/$(BOARD)-$(KERNEL)-create-packages
        -mkdir $(BUILD_DIR)/kmod-control
        env GCC_HONOUR_COPTS=s $(MAKE) $(KERNEL_IPKG) $(TARGETS) $(MAKE_TRACE)
        touch -c $(LINUX_DIR)/vmlinux

$(LINUX_KERNEL): $(LINUX_DIR)/vmlinux
        $(TRACE) target/linux/$(BOARD)-$(KERNEL)-kernel-strip
ifeq ($(KERNEL),2.4)
ifeq ($(BOARD),brcm)
ifneq ($(FS),nfs)
        $(TARGET_CROSS)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S $< $@ $(MAKE_TRACE)
else
        $(TARGET_CROSS)objcopy -R .reginfo -R .note -R .comment -R .mdebug -S $< $@ $(MAKE_TRACE)
endif
else
        $(TARGET_CROSS)objcopy -R .reginfo -R .note -R .comment -R .mdebug -S $< $@ $(MAKE_TRACE)
endif
else
ifeq ($(BOARD),brcm)
        $(TARGET_CROSS)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S $< $@ $(MAKE_TRACE)
else
ifeq ($(BOARD),atheros)
        $(TARGET_CROSS)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S $< $@ $(MAKE_TRACE)
else
        $(TARGET_CROSS)objcopy -R .reginfo -R .note -R .comment -R .mdebug -S $< $@ $(MAKE_TRACE)
endif
endif
endif

$(KERNEL_IPKG):
        $(TRACE) target/linux/$(BOARD)-$(KERNEL)-$(DEVICE)-$(FS)-create-kernel-package
        rm -rf $(KERNEL_IDIR)
        mkdir -p $(KERNEL_IDIR)/etc
        ${MBSH} ${SCRIPT_DIR}/make-ipkg-dir.sh ${KERNEL_IDIR} \
            ../kernel.control ${BOARD}-${KERNEL}-${LINUX_VERSION} ${ARCH}
        $(IPKG_BUILD) $(KERNEL_IDIR) $(PACKAGE_DIR) $(MAKE_TRACE)

prepare:
compile: $(LINUX_KERNEL)

install: compile
        env GCC_HONOUR_COPTS=s $(MAKE) $(KPKG_MAKEOPTS) $(LINUX_KERNEL) $(MAKE_TRACE)
        $(TRACE) target/linux/$(BOARD)-$(KERNEL)-modules-install
        rm -rf ${LINUX_BUILD_DIR}/root*
        cd ${BUILD_DIR} && mirpax -rw -pe root ${LINUX_BUILD_DIR}/
        printf '%s\n%s\n' 'dest root /' \
            'option offline_root $(LINUX_BUILD_DIR)/root' \
            >$(LINUX_BUILD_DIR)/ipkg.conf
ifneq ($(strip $(INSTALL_TARGETS)),)
        $(IPKG_KERNEL) install $(INSTALL_TARGETS) $(MAKE_TRACE)
endif

noinstall: compile
        env GCC_HONOUR_COPTS=s $(MAKE) $(KPKG_MAKEOPTS) $(LINUX_KERNEL) $(MAKE_TRACE)
        rm -rf ${LINUX_BUILD_DIR}/root*
        cd ${BUILD_DIR} && mirpax -rw -pe root ${LINUX_BUILD_DIR}/
        printf '%s\n%s\n' 'dest root /' \
            'option offline_root $(LINUX_BUILD_DIR)/root' \
            >$(LINUX_BUILD_DIR)/ipkg.conf
ifneq ($(strip ${NOINSTALL_TARGETS}),)
        ${IPKG_KERNEL} install ${NOINSTALL_TARGETS} ${MAKE_TRACE}
endif

clean:
        rm -rf $(LINUX_BUILD_DIR)
        rm -f $(TARGETS)