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linux: convert to the GENTARGETS infrastructure
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
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@tpetazzoni @jacmet
tpetazzoni authored and jacmet committed Jul 11, 2011
1 parent af52661 commit 9af0ee8
Showing 1 changed file with 61 additions and 65 deletions.
126 changes: 61 additions & 65 deletions linux/linux.mk
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Original file line number Diff line number Diff line change
Expand Up @@ -7,16 +7,18 @@ LINUX_VERSION=$(call qstrip,$(BR2_LINUX_KERNEL_VERSION))

# Compute LINUX_SOURCE and LINUX_SITE from the configuration
ifeq ($(LINUX_VERSION),custom)
LINUX_TARBALL:=$(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION))
LINUX_SITE:=$(dir $(LINUX_TARBALL))
LINUX_SOURCE:=$(notdir $(LINUX_TARBALL))
LINUX_TARBALL = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION))
LINUX_SITE = $(dir $(LINUX_TARBALL))
LINUX_SOURCE = $(notdir $(LINUX_TARBALL))
else
LINUX_SOURCE:=linux-$(LINUX_VERSION).tar.bz2
LINUX_SITE:=$(BR2_KERNEL_MIRROR)/linux/kernel/v2.6/
LINUX_SOURCE = linux-$(LINUX_VERSION).tar.bz2
LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v2.6/
endif

LINUX_DIR:=$(BUILD_DIR)/linux-$(LINUX_VERSION)
LINUX_PATCH=$(call qstrip,$(BR2_LINUX_KERNEL_PATCH))
LINUX_PATCHES = $(call qstrip,$(BR2_LINUX_KERNEL_PATCH))

LINUX_INSTALL_IMAGES = YES
LINUX_DEPENDENCIES += host-module-init-tools

LINUX_MAKE_FLAGS = \
HOSTCC="$(HOSTCC)" \
Expand Down Expand Up @@ -74,27 +76,17 @@ LINUX_IMAGE_PATH=$(KERNEL_ARCH_PATH)/boot/$(LINUX_IMAGE_NAME)
endif
endif # BR2_LINUX_KERNEL_VMLINUX

# Download
$(LINUX_DIR)/.stamp_downloaded:
@$(call MESSAGE,"Downloading kernel")
$(call DOWNLOAD,$(LINUX_SITE),$(LINUX_SOURCE))
$(foreach patch,$(filter ftp://% http://%,$(LINUX_PATCH)),\
define LINUX_DOWNLOAD_PATCHES
$(if $(LINUX_PATCHES),
@$(call MESSAGE,"Download additional patches"))
$(foreach patch,$(filter ftp://% http://%,$(LINUX_PATCHES)),\
$(call DOWNLOAD,$(dir $(patch)),$(notdir $(patch)))$(sep))
mkdir -p $(@D)
touch $@

# Extraction
$(LINUX_DIR)/.stamp_extracted: $(LINUX_DIR)/.stamp_downloaded
@$(call MESSAGE,"Extracting kernel")
mkdir -p $(@D)
$(Q)$(INFLATE$(suffix $(LINUX_SOURCE))) $(DL_DIR)/$(LINUX_SOURCE) | \
tar -C $(@D) $(TAR_STRIP_COMPONENTS)=1 $(TAR_OPTIONS) -
$(Q)touch $@
endef

LINUX_POST_DOWNLOAD_HOOKS += LINUX_DOWNLOAD_PATCHES

# Patch
$(LINUX_DIR)/.stamp_patched: $(LINUX_DIR)/.stamp_extracted
@$(call MESSAGE,"Patching kernel")
for p in $(LINUX_PATCH) ; do \
define LINUX_APPLY_PATCHES
for p in $(LINUX_PATCHES) ; do \
if echo $$p | grep -q -E "^ftp://|^http://" ; then \
toolchain/patch-kernel.sh $(@D) $(DL_DIR) `basename $$p` ; \
elif test -d $$p ; then \
Expand All @@ -103,64 +95,66 @@ $(LINUX_DIR)/.stamp_patched: $(LINUX_DIR)/.stamp_extracted
toolchain/patch-kernel.sh $(@D) `dirname $$p` `basename $$p` ; \
fi \
done
$(Q)touch $@
endef

LINUX_POST_PATCH_HOOKS += LINUX_APPLY_PATCHES


# Configuration
$(LINUX_DIR)/.stamp_configured: $(LINUX_DIR)/.stamp_patched
@$(call MESSAGE,"Configuring kernel")
ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
$(TARGET_MAKE_ENV) $(MAKE1) $(LINUX_MAKE_FLAGS) -C $(@D) $(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG))_defconfig
KERNEL_SOURCE_CONFIG = $(KERNEL_ARCH_PATH)/configs/$(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG))_defconfig
else ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
cp $(BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE) $(KERNEL_ARCH_PATH)/configs/buildroot_defconfig
KERNEL_SOURCE_CONFIG = $(BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE)
endif

define LINUX_CONFIGURE_CMDS
cp $(KERNEL_SOURCE_CONFIG) $(KERNEL_ARCH_PATH)/configs/buildroot_defconfig
$(TARGET_MAKE_ENV) $(MAKE1) $(LINUX_MAKE_FLAGS) -C $(@D) buildroot_defconfig
rm $(KERNEL_ARCH_PATH)/configs/buildroot_defconfig
endif
ifeq ($(BR2_ARM_EABI),y)
$(call KCONFIG_ENABLE_OPT,CONFIG_AEABI,$(@D)/.config)
else
$(call KCONFIG_DISABLE_OPT,CONFIG_AEABI,$(@D)/.config)
endif
ifeq ($(BR2_TARGET_ROOTFS_INITRAMFS),y)
$(if $(BR2_ARM_EABI),
$(call KCONFIG_ENABLE_OPT,CONFIG_AEABI,$(@D)/.config),
$(call KCONFIG_DISABLE_OPT,CONFIG_AEABI,$(@D)/.config))
# As the kernel gets compiled before root filesystems are
# built, we create a fake initramfs file list. It'll be
# replaced later by the real list, and the kernel will be
# rebuilt using the linux26-rebuild-with-initramfs target.
touch $(BINARIES_DIR)/rootfs.initramfs
$(call KCONFIG_ENABLE_OPT,CONFIG_BLK_DEV_INITRD,$(@D)/.config)
$(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_SOURCE,\"$(BINARIES_DIR)/rootfs.initramfs\",$(@D)/.config)
$(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_UID,0,$(@D)/.config)
$(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_GID,0,$(@D)/.config)
$(call KCONFIG_DISABLE_OPT,CONFIG_INITRAMFS_COMPRESSION_NONE,$(@D)/.config)
$(call KCONFIG_ENABLE_OPT,CONFIG_INITRAMFS_COMPRESSION_GZIP,$(@D)/.config)
endif
ifneq ($(BR2_ROOTFS_DEVICE_CREATION_STATIC),y)
$(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS,$(@D)/.config)
$(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS_MOUNT,$(@D)/.config)
endif
ifeq ($(BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV),y)
$(call KCONFIG_SET_OPT,CONFIG_UEVENT_HELPER_PATH,\"/sbin/mdev\",$(@D)/.config)
endif
$(TARGET_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) oldconfig
$(Q)touch $@
$(if $(BR2_TARGET_ROOTFS_INITRAMFS),
touch $(BINARIES_DIR)/rootfs.initramfs
$(call KCONFIG_ENABLE_OPT,CONFIG_BLK_DEV_INITRD,$(@D)/.config)
$(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_SOURCE,\"$(BINARIES_DIR)/rootfs.initramfs\",$(@D)/.config)
$(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_UID,0,$(@D)/.config)
$(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_GID,0,$(@D)/.config)
$(call KCONFIG_DISABLE_OPT,CONFIG_INITRAMFS_COMPRESSION_NONE,$(@D)/.config)
$(call KCONFIG_ENABLE_OPT,CONFIG_INITRAMFS_COMPRESSION_GZIP,$(@D)/.config))
$(if $(BR2_ROOTFS_DEVICE_CREATION_STATIC),,
$(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS,$(@D)/.config)
$(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS_MOUNT,$(@D)/.config))
$(if $(BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV),
$(call KCONFIG_SET_OPT,CONFIG_UEVENT_HELPER_PATH,\"/sbin/mdev\",$(@D)/.config))
yes '' | $(TARGET_MAKE_ENV) $(MAKE1) $(LINUX_MAKE_FLAGS) -C $(@D) oldconfig
endef

# Compilation. We make sure the kernel gets rebuilt when the
# configuration has changed.
$(LINUX_DIR)/.stamp_compiled: $(LINUX_DIR)/.stamp_configured $(LINUX_DIR)/.config
@$(call MESSAGE,"Compiling kernel")
define LINUX_BUILD_CMDS
$(TARGET_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_IMAGE_NAME)
@if grep -q "CONFIG_MODULES=y" $(@D)/.config; then \
$(TARGET_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) modules ; \
fi
$(Q)touch $@
endef


# Installation
$(LINUX_DIR)/.stamp_installed: $(LINUX_DIR)/.stamp_compiled
@$(call MESSAGE,"Installing kernel")
ifeq ($(BR2_LINUX_KERNEL_INSTALL_TARGET),y)
define LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET
install -m 0644 -D $(LINUX_IMAGE_PATH) $(TARGET_DIR)/boot/$(LINUX_IMAGE_NAME)
endef
endif

define LINUX_INSTALL_IMAGES_CMDS
cp $(LINUX_IMAGE_PATH) $(BINARIES_DIR)
endef

define LINUX_INSTALL_TARGET_CMDS
$(LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET)
# Install modules and remove symbolic links pointing to build
# directories, not relevant on the target
@if grep -q "CONFIG_MODULES=y" $(@D)/.config; then \
Expand All @@ -169,17 +163,18 @@ endif
rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/build ; \
rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/source ; \
fi
$(Q)touch $@
endef

linux linux26: host-module-init-tools $(LINUX_DEPENDENCIES) $(LINUX_DIR)/.stamp_installed
$(eval $(call GENTARGETS,,linux))

linux-menuconfig linux-xconfig linux-gconfig linux-nconfig linux26-menuconfig linux26-xconfig linux26-gconfig linux26-nconfig: dirs $(LINUX_DIR)/.stamp_configured
$(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) \
$(subst linux-,,$(subst linux26-,,$@))
rm -f $(LINUX_DIR)/.stamp_{built,target_installed,images_installed}

# Support for rebuilding the kernel after the initramfs file list has
# been generated in $(BINARIES_DIR)/rootfs.initramfs.
$(LINUX_DIR)/.stamp_initramfs_rebuilt: $(LINUX_DIR)/.stamp_installed $(BINARIES_DIR)/rootfs.initramfs
$(LINUX_DIR)/.stamp_initramfs_rebuilt: $(LINUX_DIR)/.stamp_target_installed $(LINUX_DIR)/.stamp_images_installed $(BINARIES_DIR)/rootfs.initramfs
@$(call MESSAGE,"Rebuilding kernel with initramfs")
# Remove the previously generated initramfs which was empty,
# to make sure the kernel will actually regenerate it.
Expand All @@ -194,6 +189,7 @@ $(LINUX_DIR)/.stamp_initramfs_rebuilt: $(LINUX_DIR)/.stamp_installed $(BINARIES_
# after it generated the initramfs list of files.
linux-rebuild-with-initramfs linux26-rebuild-with-initramfs: $(LINUX_DIR)/.stamp_initramfs_rebuilt


ifeq ($(BR2_LINUX_KERNEL),y)
TARGETS+=linux
endif
Expand Down

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