source: freewrt/mk/kernel-build.mk@ fe8c8c9

# $FreeWRT$
#-
# 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.

LINUX_SOURCE:=linux-$(LINUX_VERSION).tar.bz2
LINUX_SITE=http://www.us.kernel.org/pub/linux/kernel/v$(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)

KERNEL_IDIR:=$(LINUX_BUILD_DIR)/kernel-ipkg

$(DL_DIR)/$(LINUX_SOURCE):
        -mkdir -p $(DL_DIR)
        @$(TRACE) target/linux/$(BOARD)-$(KERNEL)-kernel-download
        $(SCRIPT_DIR)/download.pl $(DL_DIR) $(LINUX_SOURCE) $(LINUX_KERNEL_MD5SUM) $(LINUX_SITE) $(MAKE_TRACE)

$(LINUX_DIR)/.unpacked: $(DL_DIR)/$(LINUX_SOURCE)
        @$(TRACE) target/linux/$(BOARD)-$(KERNEL)-kernel-prepare
        -mkdir -p $(LINUX_BUILD_DIR)
        bzcat $(DL_DIR)/$(LINUX_SOURCE) | (cd $(LINUX_BUILD_DIR); tar xf - )
        rm -f $(BUILD_DIR)/linux
        ln -s $(LINUX_BUILD_DIR)/linux-$(LINUX_VERSION) $(BUILD_DIR)/linux
        touch $@

$(LINUX_DIR)/.patched: $(LINUX_DIR)/.unpacked
        @$(TRACE) target/linux/$(BOARD)-$(KERNEL)-kernel-patch
        -[ -d ../generic-$(KERNEL)/patches ] && $(PATCH) $(LINUX_DIR) ../generic-$(KERNEL)/patches $(MAKE_TRACE)
        -[ -d ./patches ] && $(PATCH) $(LINUX_DIR) ./patches $(MAKE_TRACE)
        -[ -d ./$(DEVICE)/patches ] && $(PATCH) $(LINUX_DIR) ./$(DEVICE)/patches $(MAKE_TRACE)
ifeq ($(FS),squashfs-overlay)
ifneq ($(strip $(DEVICECONFIG)),)
        $(CP) $(DEVICE)/config/config.squashfs_overlay $(LINUX_DIR)/.config
else
        $(CP) $(FS)/config/config.squashfs_overlay $(LINUX_DIR)/.config
endif
endif
ifeq ($(FS),squashfs-symlinks)
ifneq ($(strip $(DEVICECONFIG)),)
        $(CP) $(DEVICE)/config/config.squashfs_symlinks $(LINUX_DIR)/.config
else
        $(CP) $(FS)/config/config.squashfs_symlinks $(LINUX_DIR)/.config
endif
endif
ifeq ($(FS),jffs2)
ifneq ($(strip $(DEVICECONFIG)),)
        $(CP) $(DEVICE)/config/config.jffs2 $(LINUX_DIR)/.config
else
        $(CP) $(FS)/config/config.jffs2 $(LINUX_DIR)/.config
endif
endif
ifeq ($(FS),nfs)
ifneq ($(strip $(DEVICECONFIG)),)
        $(CP) $(DEVICE)/config/config.nfs $(LINUX_DIR)/.config
else
        $(CP) $(FS)/config/config.nfs $(LINUX_DIR)/.config
endif
endif
ifeq ($(FS),ext2-cf)
ifneq ($(strip $(DEVICECONFIG)),)
        $(CP) $(DEVICE)/config/config.ext2 $(LINUX_DIR)/.config
else
        $(CP) $(FS)/config/config.ext2 $(LINUX_DIR)/.config
endif
endif
ifeq ($(FS),yaffs2)
ifneq ($(strip $(DEVICECONFIG)),)
        $(CP) $(DEVICE)/config/config.yaffs2 $(LINUX_DIR)/.config
else
        $(CP) $(FS)/config/config.yaffs2 $(LINUX_DIR)/.config
endif
endif
        touch $@

ifeq ($(KERNEL),2.4)
$(LINUX_DIR)/.configured: $(LINUX_DIR)/.patched
        @$(TRACE) target/linux/$(BOARD)-$(KERNEL)-kernel-configure
        $(SED) "s,^CROSS_COMPILE.*,CROSS_COMPILE=$(KERNEL_CROSS),g;" \
          $(LINUX_DIR)/Makefile  \
          $(LINUX_DIR)/arch/*/Makefile
        $(MAKE) -C $(LINUX_DIR) ARCH=$(LINUX_KARCH) oldconfig include/linux/compile.h include/linux/version.h $(MAKE_TRACE)
        $(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" ARCH=$(LINUX_KARCH) dep $(MAKE_TRACE)
        touch $@
else
$(LINUX_DIR)/.configured: $(LINUX_DIR)/.patched
        @$(TRACE) target/linux/$(BOARD)-$(KERNEL)-kernel-configure
        $(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" ARCH=$(LINUX_KARCH) oldconfig prepare scripts $(MAKE_TRACE)
        touch $@
endif

$(LINUX_DIR)/vmlinux: $(LINUX_DIR)/.configured
        @$(TRACE) target/linux/$(BOARD)-$(KERNEL)-kernel-compile
        $(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" ARCH=$(LINUX_KARCH) PATH=$(TARGET_PATH) $(MAKE_TRACE)

$(LINUX_KERNEL): $(LINUX_DIR)/vmlinux
        @$(TRACE) target/linux/$(BOARD)-$(KERNEL)-kernel-strip
ifeq ($(BOARD),brcm)
        $(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
        touch -c $(LINUX_KERNEL)

$(LINUX_DIR)/.modules-compile:
        @$(TRACE) target/linux/$(BOARD)-$(KERNEL)-modules-compile
        $(MAKE) -C "$(LINUX_DIR)" CROSS_COMPILE="$(KERNEL_CROSS)" ARCH=$(LINUX_KARCH) PATH="$(TARGET_PATH)" modules $(MAKE_TRACE)
        touch $@

$(LINUX_DIR)/.modules-install: $(LINUX_DIR)/.modules-compile
        @$(TRACE) target/linux/$(BOARD)-$(KERNEL)-modules-install
        rm -rf $(LINUX_BUILD_DIR)/modules
        $(MAKE) -C "$(LINUX_DIR)" CROSS_COMPILE="$(KERNEL_CROSS)" DEPMOD=true INSTALL_MOD_PATH=$(LINUX_BUILD_DIR)/modules modules_install $(MAKE_TRACE)
        touch $@

$(LINUX_DIR)/.linux-compile: $(LINUX_KERNEL) $(LINUX_DIR)/.modules-install
        @$(TRACE) target/linux/$(BOARD)-$(KERNEL)-create-packages
        @$(MAKE) $(KERNEL_IPKG) $(TARGETS) $(MAKE_TRACE)
        touch $@

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


prepare: 
        -mkdir -p $(PACKAGE_DIR)

compile: prepare $(LINUX_DIR)/.linux-compile
compile-kernel: prepare $(LINUX_KERNEL)

install: compile
        $(MAKE) $(KPKG_MAKEOPTS) $(LINUX_KERNEL) $(MAKE_TRACE)
        @$(TRACE) target/linux/$(BOARD)-$(KERNEL)-modules-install
        @rm -rf $(LINUX_BUILD_DIR)/root*
        @$(CP) $(BUILD_DIR)/root $(LINUX_BUILD_DIR)/
        echo -e 'dest root /\noption offline_root $(LINUX_BUILD_DIR)/root' > $(LINUX_BUILD_DIR)/ipkg.conf
ifneq ($(strip $(INSTALL_TARGETS)),)
        $(IPKG_KERNEL) install $(INSTALL_TARGETS) $(MAKE_TRACE)
endif

rebuild:
        @$(TRACE) target/linux/$(BOARD)-$(KERNEL)-rebuild
        rm -rf $(LINUX_BUILD_DIR)/linux-$(LINUX_VERSION)
        rm -f $(TARGETS)
        $(MAKE) compile $(MAKE_TRACE)

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