mirror of
https://git.busybox.net/buildroot.git
synced 2024-12-03 18:33:48 +08:00
New, simpler, infrastructure for building the Linux kernel
This patch introduces a single, simple, infrastructure to build the Linux kernel. The configuration is limited to : * Kernel version: a fixed recent stable version, same as kernel headers version (for internal toolchains only), custom stable version, or custom tarball URL * Kernel patch: either a local file, directory or an URL * Kernel configuration: either the name of a defconfig or the location of a custom configuration file * Kernel image: either uImage, bzImage, zImage or vmlinux. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Thomas Petazzoni
parent
cd7459b4ee
commit
487e21cff6
@ -295,4 +295,4 @@ source "fs/Config.in"
|
||||
|
||||
source "boot/Config.in"
|
||||
|
||||
source "target/Config.in"
|
||||
source "linux/Config.in"
|
||||
|
||||
1
Makefile
1
Makefile
@ -323,6 +323,7 @@ endif
|
||||
|
||||
include boot/common.mk
|
||||
include target/Makefile.in
|
||||
include linux/linux.mk
|
||||
include fs/common.mk
|
||||
|
||||
TARGETS+=erase-fakeroots
|
||||
|
||||
133
linux/Config.in
Normal file
133
linux/Config.in
Normal file
@ -0,0 +1,133 @@
|
||||
menu "Kernel"
|
||||
|
||||
config BR2_LINUX_KERNEL
|
||||
bool "Linux Kernel"
|
||||
help
|
||||
Enable this option if you want to build a Linux kernel for
|
||||
your embedded device
|
||||
|
||||
if BR2_LINUX_KERNEL
|
||||
|
||||
#
|
||||
# Version selection. We provide the choice between:
|
||||
#
|
||||
# 1. A single fairly recent stable kernel version
|
||||
# 2. In case an internal toolchain has been built, the same kernel
|
||||
# version as the kernel headers
|
||||
# 3. A custom stable version
|
||||
# 4. A custom tarball
|
||||
#
|
||||
choice
|
||||
prompt "Kernel version"
|
||||
default BR2_LINUX_KERNEL_2_6_34
|
||||
|
||||
config BR2_LINUX_KERNEL_2_6_34
|
||||
bool "2.6.34"
|
||||
|
||||
config BR2_LINUX_KERNEL_SAME_AS_HEADERS
|
||||
bool "Same as toolchain kernel headers"
|
||||
depends on BR2_TOOLCHAIN_BUILDROOT
|
||||
help
|
||||
This option will re-use the same kernel sources as the one
|
||||
that have been used for the kernel headers of the
|
||||
cross-compiling toolchain. Having the same version for the
|
||||
kernel running on the system and for the kernel headers is
|
||||
not a requirement, but using the same version allows to
|
||||
download only one tarball of the kernel sources.
|
||||
|
||||
config BR2_LINUX_KERNEL_CUSTOM_VERSION
|
||||
bool "Custom version"
|
||||
help
|
||||
This option allows to use a specific 2.6.x or 2.6.x.y
|
||||
official versions, as available on kernel.org
|
||||
|
||||
config BR2_LINUX_KERNEL_CUSTOM_TARBALL
|
||||
bool "Custom tarball"
|
||||
help
|
||||
This option allows to specify the http or ftp location of a
|
||||
specific kernel source tarball
|
||||
|
||||
endchoice
|
||||
|
||||
config BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE
|
||||
string "Kernel version"
|
||||
depends on BR2_LINUX_KERNEL_CUSTOM_VERSION
|
||||
default "2.6.34"
|
||||
|
||||
config BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION
|
||||
string "URL of custom kernel tarball"
|
||||
depends on BR2_LINUX_KERNEL_CUSTOM_TARBALL
|
||||
|
||||
config BR2_LINUX_KERNEL_VERSION
|
||||
string
|
||||
default "2.6.34" if BR2_LINUX_KERNEL_2_6_34
|
||||
default BR2_DEFAULT_KERNEL_HEADERS if BR2_LINUX_KERNEL_SAME_AS_HEADERS
|
||||
default BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE if BR2_LINUX_KERNEL_CUSTOM_VERSION
|
||||
default "custom" if BR2_LINUX_KERNEL_CUSTOM_TARBALL
|
||||
|
||||
#
|
||||
# Patch selection
|
||||
#
|
||||
|
||||
config BR2_LINUX_KERNEL_PATCH
|
||||
string "Custom kernel patch"
|
||||
help
|
||||
The location can be an URL, a file path, or a directory. In
|
||||
the case of a directory, all files matching linux-*.patch
|
||||
will be applied.
|
||||
|
||||
#
|
||||
# Configuration selection
|
||||
#
|
||||
|
||||
choice
|
||||
prompt "Kernel configuration"
|
||||
default BR2_LINUX_KERNEL_USE_DEFCONFIG
|
||||
|
||||
config BR2_LINUX_KERNEL_USE_DEFCONFIG
|
||||
bool "Using a defconfig"
|
||||
|
||||
config BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG
|
||||
bool "Using a custom config file"
|
||||
|
||||
endchoice
|
||||
|
||||
config BR2_LINUX_KERNEL_DEFCONFIG
|
||||
string "Defconfig name"
|
||||
depends on BR2_LINUX_KERNEL_USE_DEFCONFIG
|
||||
help
|
||||
Name of the defconfig file to use, without the leading
|
||||
_defconfig
|
||||
|
||||
config BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE
|
||||
string "Configuration file path"
|
||||
depends on BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG
|
||||
help
|
||||
Path to the kernel configuration file
|
||||
|
||||
#
|
||||
# Binary format
|
||||
#
|
||||
|
||||
choice
|
||||
prompt "Kernel binary format"
|
||||
default BR2_LINUX_KERNEL_UIMAGE if !BR2_i386 && !BR2_x86_64
|
||||
default BR2_LINUX_KERNEL_BZIMAGE if BR2_i386 || BR2_x86_64
|
||||
|
||||
config BR2_LINUX_KERNEL_UIMAGE
|
||||
bool "uImage"
|
||||
|
||||
config BR2_LINUX_KERNEL_BZIMAGE
|
||||
bool "bzImage"
|
||||
|
||||
config BR2_LINUX_KERNEL_ZIMAGE
|
||||
bool "zImage"
|
||||
|
||||
config BR2_LINUX_KERNEL_VMLINUX
|
||||
bool "vmlinux"
|
||||
|
||||
endchoice
|
||||
|
||||
endif # BR2_LINUX_KERNEL
|
||||
|
||||
endmenu
|
||||
118
linux/linux.mk
Normal file
118
linux/linux.mk
Normal file
@ -0,0 +1,118 @@
|
||||
###############################################################################
|
||||
#
|
||||
# Linux kernel 2.6 target
|
||||
#
|
||||
###############################################################################
|
||||
LINUX26_VERSION=$(call qstrip,$(BR2_LINUX_KERNEL_VERSION))
|
||||
|
||||
# Compute LINUX26_SOURCE and LINUX26_SITE from the configuration
|
||||
ifeq ($(LINUX26_VERSION),custom)
|
||||
LINUX26_TARBALL:=$(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION))
|
||||
LINUX26_SITE:=$(dir $(LINUX26_TARBALL))
|
||||
LINUX26_SOURCE:=$(notdir $(LINUX26_TARBALL))
|
||||
else
|
||||
LINUX26_SOURCE:=linux-$(LINUX26_VERSION).tar.bz2
|
||||
LINUX26_SITE:=$(BR2_KERNEL_MIRROR)/linux/kernel/v2.6/
|
||||
endif
|
||||
|
||||
LINUX26_DIR:=$(BUILD_DIR)/linux-$(LINUX26_VERSION)
|
||||
LINUX26_PATCH=$(call qstrip,$(BR2_LINUX_KERNEL_PATCH))
|
||||
|
||||
LINUX26_MAKE_FLAGS = \
|
||||
HOSTCC="$(HOSTCC)" \
|
||||
HOSTCFLAGS="$(HOSTCFLAGS)" \
|
||||
ARCH=$(KERNEL_ARCH) \
|
||||
INSTALL_MOD_PATH=$(TARGET_DIR) \
|
||||
CROSS_COMPILE=$(TARGET_CROSS) \
|
||||
LDFLAGS="$(TARGET_LDFLAGS)" \
|
||||
LZMA="$(LZMA)"
|
||||
|
||||
# Get the real Linux version, which tells us where kernel modules are
|
||||
# going to be installed in the target filesystem.
|
||||
LINUX26_VERSION_PROBED = $(shell $(MAKE) $(LINUX26_MAKE_FLAGS) -C $(LINUX26_DIR) --no-print-directory -s kernelrelease)
|
||||
|
||||
ifeq ($(BR2_LINUX_KERNEL_UIMAGE),y)
|
||||
LINUX26_IMAGE_NAME=uImage
|
||||
LINUX26_DEPENDENCIES+=$(MKIMAGE)
|
||||
else ifeq ($(BR2_LINUX_KERNEL_BZIMAGE),y)
|
||||
LINUX26_IMAGE_NAME=bzImage
|
||||
else ifeq ($(BR2_LINUX_KERNEL_ZIMAGE),y)
|
||||
LINUX26_IMAGE_NAME=zImage
|
||||
else ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
|
||||
LINUX26_IMAGE_NAME=vmlinux.bin
|
||||
endif
|
||||
|
||||
LINUX26_IMAGE_PATH=$(LINUX26_DIR)/arch/$(KERNEL_ARCH)/boot/$(LINUX26_IMAGE_NAME)
|
||||
|
||||
# Download
|
||||
$(LINUX26_DIR)/.stamp_downloaded:
|
||||
@$(call MESSAGE,"Downloading kernel")
|
||||
$(call DOWNLOAD,$(LINUX26_SITE),$(LINUX26_SOURCE))
|
||||
ifneq ($(filter ftp://% http://%,$(LINUX26_PATCH)),)
|
||||
$(call DOWNLOAD,$(dir $(LINUX26_PATCH)),$(notdir $(LINUX26_PATCH)))
|
||||
endif
|
||||
mkdir -p $(@D)
|
||||
touch $@
|
||||
|
||||
# Extraction
|
||||
$(LINUX26_DIR)/.stamp_extracted: $(LINUX26_DIR)/.stamp_downloaded
|
||||
@$(call MESSAGE,"Extracting kernel")
|
||||
mkdir -p $(@D)
|
||||
$(Q)$(INFLATE$(suffix $(LINUX26_SOURCE))) $(DL_DIR)/$(LINUX26_SOURCE) | \
|
||||
tar -C $(@D) $(TAR_STRIP_COMPONENTS)=1 $(TAR_OPTIONS) -
|
||||
$(Q)touch $@
|
||||
|
||||
# Patch
|
||||
$(LINUX26_DIR)/.stamp_patched: $(LINUX26_DIR)/.stamp_extracted
|
||||
@$(call MESSAGE,"Patching kernel")
|
||||
ifneq ($(LINUX26_PATCH),)
|
||||
ifneq ($(filter ftp://% http://%,$(LINUX26_PATCH)),)
|
||||
toolchain/patch-kernel.sh $(@D) $(DL_DIR) $(notdir $(LINUX26_PATCH))
|
||||
else ifeq ($(shell test -d $(LINUX26_PATCH) && echo "dir"),dir)
|
||||
toolchain/patch-kernel.sh $(@D) $(LINUX26_PATCH) linux-\*.patch
|
||||
else
|
||||
toolchain/patch-kernel.sh $(@D) $(dir $(LINUX26_PATCH)) $(notdir $(LINUX26_PATCH))
|
||||
endif
|
||||
endif
|
||||
$(Q)touch $@
|
||||
|
||||
|
||||
# Configuration
|
||||
$(LINUX26_DIR)/.stamp_configured: $(LINUX26_DIR)/.stamp_patched
|
||||
@$(call MESSAGE,"Configuring kernel")
|
||||
ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
|
||||
$(TARGET_MAKE_ENV) $(MAKE1) $(LINUX26_MAKE_FLAGS) -C $(@D) $(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG))_defconfig
|
||||
else ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
|
||||
cp $(BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE) $(@D)/.config
|
||||
endif
|
||||
$(TARGET_MAKE_ENV) $(MAKE) $(LINUX26_MAKE_FLAGS) -C $(@D) oldconfig
|
||||
$(Q)touch $@
|
||||
|
||||
# Compilation
|
||||
$(LINUX26_DIR)/.stamp_compiled: $(LINUX26_DIR)/.stamp_configured
|
||||
@$(call MESSAGE,"Compiling kernel")
|
||||
$(TARGET_MAKE_ENV) $(MAKE) $(LINUX26_MAKE_FLAGS) -C $(@D) $(LINUX26_IMAGE_NAME)
|
||||
@if [ $(shell grep -c "CONFIG_MODULES=y" $(LINUX26_DIR)/.config) != 0 ] ; then \
|
||||
$(TARGET_MAKE_ENV) $(MAKE) $(LINUX26_MAKE_FLAGS) -C $(@D) modules ; \
|
||||
fi
|
||||
$(Q)touch $@
|
||||
|
||||
# Installation
|
||||
$(LINUX26_DIR)/.stamp_installed: $(LINUX26_DIR)/.stamp_compiled
|
||||
@$(call MESSAGE,"Installing kernel")
|
||||
cp $(LINUX26_IMAGE_PATH) $(BINARIES_DIR)
|
||||
# Install modules and remove symbolic links pointing to build
|
||||
# directories, not relevant on the target
|
||||
@if [ $(shell grep -c "CONFIG_MODULES=y" $(LINUX26_DIR)/.config) != 0 ] ; then \
|
||||
$(TARGET_MAKE_ENV) $(MAKE1) $(LINUX26_MAKE_FLAGS) -C $(@D) \
|
||||
INSTALL_MOD_PATH=$(TARGET_DIR) modules_install ; \
|
||||
rm -f $(TARGET_DIR)/lib/modules/$(LINUX26_VERSION_PROBED)/build ; \
|
||||
rm -f $(TARGET_DIR)/lib/modules/$(LINUX26_VERSION_PROBED)/source ; \
|
||||
fi
|
||||
$(Q)touch $@
|
||||
|
||||
linux26: $(LINUX26_DEPENDENCIES) $(LINUX26_DIR)/.stamp_installed
|
||||
|
||||
ifeq ($(BR2_LINUX_KERNEL),y)
|
||||
TARGETS+=linux26
|
||||
endif
|
||||
Loading…
Reference in New Issue
Block a user