2013-06-07 18:13:46 +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>
2010-04-04 00:46:46 +08:00
|
|
|
#
|
2011-07-12 04:46:07 +08:00
|
|
|
# Linux kernel target
|
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>
2010-04-04 00:46:46 +08:00
|
|
|
#
|
2013-06-07 18:13:46 +08:00
|
|
|
################################################################################
|
2013-06-06 07:53:25 +08:00
|
|
|
|
2013-07-20 14:52:43 +08:00
|
|
|
LINUX_VERSION = $(call qstrip,$(BR2_LINUX_KERNEL_VERSION))
|
2012-05-18 01:33:09 +08:00
|
|
|
LINUX_LICENSE = GPLv2
|
|
|
|
|
LINUX_LICENSE_FILES = COPYING
|
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>
2010-04-04 00:46:46 +08:00
|
|
|
|
2011-07-12 04:46:07 +08:00
|
|
|
# Compute LINUX_SOURCE and LINUX_SITE from the configuration
|
2013-02-24 02:03:30 +08:00
|
|
|
ifeq ($(BR2_LINUX_KERNEL_CUSTOM_TARBALL),y)
|
2011-07-12 04:46:08 +08:00
|
|
|
LINUX_TARBALL = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION))
|
2013-01-09 20:12:44 +08:00
|
|
|
LINUX_SITE = $(patsubst %/,%,$(dir $(LINUX_TARBALL)))
|
2011-07-12 04:46:08 +08:00
|
|
|
LINUX_SOURCE = $(notdir $(LINUX_TARBALL))
|
2013-02-24 02:03:30 +08:00
|
|
|
else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_LOCAL),y)
|
|
|
|
|
LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_LOCAL_PATH))
|
|
|
|
|
LINUX_SITE_METHOD = local
|
2011-07-12 04:46:11 +08:00
|
|
|
else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_GIT),y)
|
2013-09-03 04:07:54 +08:00
|
|
|
LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
|
2011-07-12 04:46:11 +08:00
|
|
|
LINUX_SITE_METHOD = git
|
2013-09-03 04:07:54 +08:00
|
|
|
else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_HG),y)
|
|
|
|
|
LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
|
|
|
|
|
LINUX_SITE_METHOD = hg
|
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>
2010-04-04 00:46:46 +08:00
|
|
|
else
|
2013-05-11 09:40:36 +08:00
|
|
|
LINUX_SOURCE = linux-$(LINUX_VERSION).tar.xz
|
2011-07-12 04:46:16 +08:00
|
|
|
# In X.Y.Z, get X and Y. We replace dots and dashes by spaces in order
|
2015-02-24 21:40:46 +08:00
|
|
|
# to use the $(word) function. We support versions such as 4.0, 3.1,
|
2011-07-12 04:46:16 +08:00
|
|
|
# 2.6.32, 2.6.32-rc1, 3.0-rc6, etc.
|
2011-10-24 22:54:03 +08:00
|
|
|
ifeq ($(findstring x2.6.,x$(LINUX_VERSION)),x2.6.)
|
2014-07-31 16:46:58 +08:00
|
|
|
LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v2.6
|
2015-02-24 21:40:46 +08:00
|
|
|
else ifeq ($(findstring x3.,x$(LINUX_VERSION)),x3.)
|
2014-07-31 16:46:58 +08:00
|
|
|
LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v3.x
|
2015-02-24 21:40:46 +08:00
|
|
|
else ifeq ($(findstring x4.,x$(LINUX_VERSION)),x4.)
|
|
|
|
|
LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v4.x
|
2011-10-24 22:54:03 +08:00
|
|
|
endif
|
2011-07-12 04:46:16 +08:00
|
|
|
# release candidates are in testing/ subdir
|
|
|
|
|
ifneq ($(findstring -rc,$(LINUX_VERSION)),)
|
2015-03-10 06:14:51 +08:00
|
|
|
LINUX_SITE := $(LINUX_SITE)/testing
|
2011-07-12 04:46:16 +08:00
|
|
|
endif # -rc
|
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>
2010-04-04 00:46:46 +08:00
|
|
|
endif
|
|
|
|
|
|
2011-07-12 04:46:08 +08:00
|
|
|
LINUX_PATCHES = $(call qstrip,$(BR2_LINUX_KERNEL_PATCH))
|
|
|
|
|
|
|
|
|
|
LINUX_INSTALL_IMAGES = YES
|
2014-03-06 17:42:28 +08:00
|
|
|
LINUX_DEPENDENCIES += host-kmod host-lzop
|
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>
2010-04-04 00:46:46 +08:00
|
|
|
|
2012-07-30 20:32:46 +08:00
|
|
|
ifeq ($(BR2_LINUX_KERNEL_UBOOT_IMAGE),y)
|
|
|
|
|
LINUX_DEPENDENCIES += host-uboot-tools
|
|
|
|
|
endif
|
|
|
|
|
|
2011-07-12 04:46:07 +08:00
|
|
|
LINUX_MAKE_FLAGS = \
|
New, simpler, infrastructure for building the Linux kernel
This patch introduces a single, simple, infrastructure to build the
Linux kernel. The configuration is limited to :
* Kernel version: a fixed recent stable version, same as kernel
headers version (for internal toolchains only), custom stable
version, or custom tarball URL
* Kernel patch: either a local file, directory or an URL
* Kernel configuration: either the name of a defconfig or the
location of a custom configuration file
* Kernel image: either uImage, bzImage, zImage or vmlinux.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-04-04 00:46:46 +08:00
|
|
|
HOSTCC="$(HOSTCC)" \
|
|
|
|
|
HOSTCFLAGS="$(HOSTCFLAGS)" \
|
|
|
|
|
ARCH=$(KERNEL_ARCH) \
|
|
|
|
|
INSTALL_MOD_PATH=$(TARGET_DIR) \
|
2011-02-02 01:13:00 +08:00
|
|
|
CROSS_COMPILE="$(CCACHE) $(TARGET_CROSS)" \
|
2013-09-11 03:54:59 +08:00
|
|
|
DEPMOD=$(HOST_DIR)/sbin/depmod
|
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>
2010-04-04 00:46:46 +08:00
|
|
|
|
linux: avoid unnecessary changes in defconfig for INITRAMFS_SOURCE
When Buildroot is configured to append the root filesystem to the Linux
kernel as initramfs, Buildroot sets the path to the initramfs source
dynamically in the Linux configuration file.
As this path is specified as an absolute path, typically being different
for different users of the same project (e.g. containing a username),
saving the configuration to a version control system (for example using
'make linux-update-defconfig') would result in a difference for this
path at every invocation by a different user.
Although this is technically not an issue, it is confusing that this
generates a difference.
Address this issue by using a not-yet-expanded make variable to specify
the path to the initramfs source. That variable will be expanded by the
Linux build system, which uses it both as a Makefile variable and a
shell variable; thus, it needs to be specified in LINUX_MAKE_ENV (so
it is exported and available in sub-processes of make). Any saved
configuration file would simply contain the reference to the
not-yet-expanded variable.
As in the Linux build system, the config variables are both read from
make as from a shell script, we cannot use $() syntax as this would be
interpreted as a command invocation by the shell. Instead, use ${}
syntax which is interpreted as variable reference both by the shell as
by make.
[Thomas:
- Really make the patch work by using $(LINUX_MAKE_ENV) instead of
$(TARGET_MAKE_ENV). Otherwise, the new BR2_BINARIES_DIR variable is
not passed at all stages of the build process, which makes the
build fail when an initramfs is used.]
Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: "Yann E. Morin" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2015-02-03 22:21:48 +08:00
|
|
|
LINUX_MAKE_ENV = \
|
|
|
|
|
$(TARGET_MAKE_ENV) \
|
|
|
|
|
BR_BINARIES_DIR=$(BINARIES_DIR)
|
2015-02-03 22:21:47 +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>
2010-04-04 00:46:46 +08:00
|
|
|
# Get the real Linux version, which tells us where kernel modules are
|
|
|
|
|
# going to be installed in the target filesystem.
|
2011-07-12 04:46:07 +08:00
|
|
|
LINUX_VERSION_PROBED = $(shell $(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) --no-print-directory -s kernelrelease)
|
New, simpler, infrastructure for building the Linux kernel
This patch introduces a single, simple, infrastructure to build the
Linux kernel. The configuration is limited to :
* Kernel version: a fixed recent stable version, same as kernel
headers version (for internal toolchains only), custom stable
version, or custom tarball URL
* Kernel patch: either a local file, directory or an URL
* Kernel configuration: either the name of a defconfig or the
location of a custom configuration file
* Kernel image: either uImage, bzImage, zImage or vmlinux.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-04-04 00:46:46 +08:00
|
|
|
|
2012-07-30 20:32:45 +08:00
|
|
|
ifeq ($(BR2_LINUX_KERNEL_USE_INTREE_DTS),y)
|
2012-12-21 15:39:14 +08:00
|
|
|
KERNEL_DTS_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_INTREE_DTS_NAME))
|
2012-07-30 20:32:45 +08:00
|
|
|
else ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_DTS),y)
|
2015-03-01 22:51:44 +08:00
|
|
|
# We keep only the .dts files, so that the user can specify both .dts
|
|
|
|
|
# and .dtsi files in BR2_LINUX_KERNEL_CUSTOM_DTS_PATH. Both will be
|
|
|
|
|
# copied to arch/<arch>/boot/dts, but only the .dts files will
|
|
|
|
|
# actually be generated as .dtb.
|
|
|
|
|
KERNEL_DTS_NAME = $(basename $(filter %.dts,$(notdir $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH)))))
|
2012-07-30 20:32:45 +08:00
|
|
|
endif
|
|
|
|
|
|
2013-04-15 14:55:53 +08:00
|
|
|
ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT)$(KERNEL_DTS_NAME),y)
|
|
|
|
|
$(error No kernel device tree source specified, check your \
|
|
|
|
|
BR2_LINUX_KERNEL_USE_INTREE_DTS / BR2_LINUX_KERNEL_USE_CUSTOM_DTS settings)
|
|
|
|
|
endif
|
|
|
|
|
|
2012-07-30 20:32:47 +08:00
|
|
|
ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y)
|
|
|
|
|
ifneq ($(words $(KERNEL_DTS_NAME)),1)
|
2014-10-24 13:57:37 +08:00
|
|
|
$(error Kernel with appended device tree needs exactly one DTS source. \
|
|
|
|
|
Check BR2_LINUX_KERNEL_INTREE_DTS_NAME or BR2_LINUX_KERNEL_CUSTOM_DTS_PATH.)
|
2012-07-30 20:32:47 +08:00
|
|
|
endif
|
|
|
|
|
endif
|
|
|
|
|
|
2012-12-21 15:39:14 +08:00
|
|
|
KERNEL_DTBS = $(addsuffix .dtb,$(KERNEL_DTS_NAME))
|
|
|
|
|
|
2011-03-22 01:39:43 +08:00
|
|
|
ifeq ($(BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM),y)
|
2014-07-11 20:49:22 +08:00
|
|
|
LINUX_IMAGE_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_IMAGE_NAME))
|
|
|
|
|
LINUX_TARGET_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_IMAGE_TARGET_NAME))
|
2014-12-24 21:54:55 +08:00
|
|
|
ifeq ($(LINUX_IMAGE_NAME),)
|
2014-12-16 05:19:10 +08:00
|
|
|
LINUX_IMAGE_NAME = $(LINUX_TARGET_NAME)
|
2014-12-24 21:54:55 +08:00
|
|
|
endif
|
2011-03-22 01:39:43 +08:00
|
|
|
else
|
New, simpler, infrastructure for building the Linux kernel
This patch introduces a single, simple, infrastructure to build the
Linux kernel. The configuration is limited to :
* Kernel version: a fixed recent stable version, same as kernel
headers version (for internal toolchains only), custom stable
version, or custom tarball URL
* Kernel patch: either a local file, directory or an URL
* Kernel configuration: either the name of a defconfig or the
location of a custom configuration file
* Kernel image: either uImage, bzImage, zImage or vmlinux.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-04-04 00:46:46 +08:00
|
|
|
ifeq ($(BR2_LINUX_KERNEL_UIMAGE),y)
|
2014-03-06 17:42:28 +08:00
|
|
|
LINUX_IMAGE_NAME = uImage
|
2012-07-30 20:32:47 +08:00
|
|
|
else ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y)
|
2014-03-06 17:42:28 +08:00
|
|
|
LINUX_IMAGE_NAME = uImage
|
New, simpler, infrastructure for building the Linux kernel
This patch introduces a single, simple, infrastructure to build the
Linux kernel. The configuration is limited to :
* Kernel version: a fixed recent stable version, same as kernel
headers version (for internal toolchains only), custom stable
version, or custom tarball URL
* Kernel patch: either a local file, directory or an URL
* Kernel configuration: either the name of a defconfig or the
location of a custom configuration file
* Kernel image: either uImage, bzImage, zImage or vmlinux.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-04-04 00:46:46 +08:00
|
|
|
else ifeq ($(BR2_LINUX_KERNEL_BZIMAGE),y)
|
2014-03-06 17:42:28 +08:00
|
|
|
LINUX_IMAGE_NAME = bzImage
|
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>
2010-04-04 00:46:46 +08:00
|
|
|
else ifeq ($(BR2_LINUX_KERNEL_ZIMAGE),y)
|
2014-03-06 17:42:28 +08:00
|
|
|
LINUX_IMAGE_NAME = zImage
|
2012-07-30 20:32:47 +08:00
|
|
|
else ifeq ($(BR2_LINUX_KERNEL_APPENDED_ZIMAGE),y)
|
2014-03-06 17:42:28 +08:00
|
|
|
LINUX_IMAGE_NAME = zImage
|
2012-07-30 20:32:48 +08:00
|
|
|
else ifeq ($(BR2_LINUX_KERNEL_CUIMAGE),y)
|
2014-03-06 17:42:28 +08:00
|
|
|
LINUX_IMAGE_NAME = cuImage.$(KERNEL_DTS_NAME)
|
2012-07-30 20:32:48 +08:00
|
|
|
else ifeq ($(BR2_LINUX_KERNEL_SIMPLEIMAGE),y)
|
2014-03-06 17:42:28 +08:00
|
|
|
LINUX_IMAGE_NAME = simpleImage.$(KERNEL_DTS_NAME)
|
2012-07-30 20:32:48 +08:00
|
|
|
else ifeq ($(BR2_LINUX_KERNEL_LINUX_BIN),y)
|
2014-03-06 17:42:28 +08:00
|
|
|
LINUX_IMAGE_NAME = linux.bin
|
2010-09-01 21:26:24 +08:00
|
|
|
else ifeq ($(BR2_LINUX_KERNEL_VMLINUX_BIN),y)
|
2014-03-06 17:42:28 +08:00
|
|
|
LINUX_IMAGE_NAME = vmlinux.bin
|
2010-12-06 04:53:23 +08:00
|
|
|
else ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
|
2014-03-06 17:42:28 +08:00
|
|
|
LINUX_IMAGE_NAME = vmlinux
|
2011-09-20 17:01:26 +08:00
|
|
|
else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ),y)
|
2014-03-06 17:42:28 +08:00
|
|
|
LINUX_IMAGE_NAME = vmlinuz
|
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>
2010-04-04 00:46:46 +08:00
|
|
|
endif
|
2014-12-16 05:19:10 +08:00
|
|
|
# The if-else blocks above are all the image types we know of, and all
|
|
|
|
|
# come from a Kconfig choice, so we know we have LINUX_IMAGE_NAME set
|
|
|
|
|
# to something
|
2014-07-18 03:55:08 +08:00
|
|
|
LINUX_TARGET_NAME = $(LINUX_IMAGE_NAME)
|
2011-03-22 01:39:43 +08:00
|
|
|
endif
|
2014-07-18 03:55:08 +08:00
|
|
|
|
.mk files: bulk aligment and whitespace cleanup of assignments
The Buildroot coding style defines one space around make assignments and
does not align the assignment symbols.
This patch does a bulk fix of offending packages. The package
infrastructures (or more in general assignments to calculated variable
names, like $(2)_FOO) are not touched.
Alignment of line continuation characters (\) is kept as-is.
The sed command used to do this replacement is:
find * -name "*.mk" | xargs sed -i \
-e 's#^\([A-Z0-9a-z_]\+\)\s*\([?:+]\?=\)\s*$#\1 \2#'
-e 's#^\([A-Z0-9a-z_]\+\)\s*\([?:+]\?=\)\s*\([^\\]\+\)$#\1 \2 \3#'
-e 's#^\([A-Z0-9a-z_]\+\)\s*\([?:+]\?=\)\s*\([^\\ \t]\+\s*\\\)\s*$#\1 \2 \3#'
-e 's#^\([A-Z0-9a-z_]\+\)\s*\([?:+]\?=\)\(\s*\\\)#\1 \2\3#'
Brief explanation of this command:
^\([A-Z0-9a-z_]\+\) a regular variable at the beginning of the line
\([?:+]\?=\) any assignment character =, :=, ?=, +=
\([^\\]\+\) any string not containing a line continuation
\([^\\ \t]\+\s*\\\) string, optional whitespace, followed by a
line continuation character
\(\s*\\\) optional whitespace, followed by a line
continuation character
Hence, the first subexpression handles empty assignments, the second
handles regular assignments, the third handles regular assignments with
line continuation, and the fourth empty assignments with line
continuation.
This expression was tested on following test text: (initial tab not
included)
FOO = spaces before
FOO = spaces before and after
FOO = tab before
FOO = tab and spaces before
FOO = tab after
FOO = tab and spaces after
FOO = spaces and tab after
FOO = \
FOO = bar \
FOO = bar space \
FOO = \
GENIMAGE_DEPENDENCIES = host-pkgconf libconfuse
FOO += spaces before
FOO ?= spaces before and after
FOO :=
FOO =
FOO =
FOO =
FOO =
$(MAKE1) CROSS_COMPILE=$(TARGET_CROSS) -C
AT91BOOTSTRAP3_DEFCONFIG = \
AXEL_DISABLE_I18N=--i18n=0
After this bulk change, following manual fixups were done:
- fix line continuation alignment in cegui06 and spice (the sed
expression leaves the number of whitespace between the value and line
continuation character intact, but the whitespace before that could have
changed, causing misalignment.
- qt5base was reverted, as this package uses extensive alignment which
actually makes the code more readable.
Finally, the end result was manually reviewed.
Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Cc: Yann E. Morin <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2014-10-07 15:06:03 +08:00
|
|
|
LINUX_KERNEL_UIMAGE_LOADADDR = $(call qstrip,$(BR2_LINUX_KERNEL_UIMAGE_LOADADDR))
|
2013-03-13 19:13:24 +08:00
|
|
|
ifneq ($(LINUX_KERNEL_UIMAGE_LOADADDR),)
|
2014-03-06 17:42:28 +08:00
|
|
|
LINUX_MAKE_FLAGS += LOADADDR="$(LINUX_KERNEL_UIMAGE_LOADADDR)"
|
2013-03-13 19:13:24 +08:00
|
|
|
endif
|
|
|
|
|
|
2010-12-06 04:53:26 +08:00
|
|
|
# Compute the arch path, since i386 and x86_64 are in arch/x86 and not
|
|
|
|
|
# in arch/$(KERNEL_ARCH). Even if the kernel creates symbolic links
|
|
|
|
|
# for bzImage, arch/i386 and arch/x86_64 do not exist when copying the
|
|
|
|
|
# defconfig file.
|
|
|
|
|
ifeq ($(KERNEL_ARCH),i386)
|
2014-03-06 17:42:28 +08:00
|
|
|
KERNEL_ARCH_PATH = $(LINUX_DIR)/arch/x86
|
2010-12-06 04:53:26 +08:00
|
|
|
else ifeq ($(KERNEL_ARCH),x86_64)
|
2014-03-06 17:42:28 +08:00
|
|
|
KERNEL_ARCH_PATH = $(LINUX_DIR)/arch/x86
|
2010-12-06 04:53:26 +08:00
|
|
|
else
|
2014-03-06 17:42:28 +08:00
|
|
|
KERNEL_ARCH_PATH = $(LINUX_DIR)/arch/$(KERNEL_ARCH)
|
2010-12-06 04:53:26 +08:00
|
|
|
endif
|
|
|
|
|
|
2010-12-06 04:53:23 +08:00
|
|
|
ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
|
2014-03-06 17:42:28 +08:00
|
|
|
LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
|
2011-09-20 17:01:26 +08:00
|
|
|
else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ),y)
|
2014-03-06 17:42:28 +08:00
|
|
|
LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
|
2010-12-06 04:53:23 +08:00
|
|
|
else
|
2014-03-06 17:42:28 +08:00
|
|
|
LINUX_IMAGE_PATH = $(KERNEL_ARCH_PATH)/boot/$(LINUX_IMAGE_NAME)
|
2010-12-06 04:53:23 +08:00
|
|
|
endif # BR2_LINUX_KERNEL_VMLINUX
|
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>
2010-04-04 00:46:46 +08:00
|
|
|
|
2011-07-12 04:46:08 +08:00
|
|
|
define LINUX_DOWNLOAD_PATCHES
|
|
|
|
|
$(if $(LINUX_PATCHES),
|
|
|
|
|
@$(call MESSAGE,"Download additional patches"))
|
2015-01-13 00:37:25 +08:00
|
|
|
$(foreach patch,$(filter ftp://% http://% https://%,$(LINUX_PATCHES)),\
|
2015-01-13 00:37:26 +08:00
|
|
|
$(call DOWNLOAD_WGET,$(patch),$(notdir $(patch)))$(sep))
|
2011-07-12 04:46:08 +08:00
|
|
|
endef
|
|
|
|
|
|
|
|
|
|
LINUX_POST_DOWNLOAD_HOOKS += LINUX_DOWNLOAD_PATCHES
|
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>
2010-04-04 00:46:46 +08:00
|
|
|
|
2011-07-12 04:46:08 +08:00
|
|
|
define LINUX_APPLY_PATCHES
|
|
|
|
|
for p in $(LINUX_PATCHES) ; do \
|
2015-01-13 00:37:25 +08:00
|
|
|
if echo $$p | grep -q -E "^ftp://|^http://|^https://" ; then \
|
2014-10-23 00:20:10 +08:00
|
|
|
$(APPLY_PATCHES) $(@D) $(DL_DIR) `basename $$p` ; \
|
2010-12-06 04:53:18 +08:00
|
|
|
elif test -d $$p ; then \
|
2014-10-23 00:20:10 +08:00
|
|
|
$(APPLY_PATCHES) $(@D) $$p linux-\*.patch ; \
|
2010-12-06 04:53:18 +08:00
|
|
|
else \
|
2014-10-23 00:20:10 +08:00
|
|
|
$(APPLY_PATCHES) $(@D) `dirname $$p` `basename $$p` ; \
|
2010-12-06 04:53:18 +08:00
|
|
|
fi \
|
|
|
|
|
done
|
2011-07-12 04:46:08 +08:00
|
|
|
endef
|
|
|
|
|
|
|
|
|
|
LINUX_POST_PATCH_HOOKS += LINUX_APPLY_PATCHES
|
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>
2010-04-04 00:46:46 +08:00
|
|
|
|
|
|
|
|
|
|
|
|
|
ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
|
2011-07-12 04:46:08 +08:00
|
|
|
KERNEL_SOURCE_CONFIG = $(KERNEL_ARCH_PATH)/configs/$(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG))_defconfig
|
New, simpler, infrastructure for building the Linux kernel
This patch introduces a single, simple, infrastructure to build the
Linux kernel. The configuration is limited to :
* Kernel version: a fixed recent stable version, same as kernel
headers version (for internal toolchains only), custom stable
version, or custom tarball URL
* Kernel patch: either a local file, directory or an URL
* Kernel configuration: either the name of a defconfig or the
location of a custom configuration file
* Kernel image: either uImage, bzImage, zImage or vmlinux.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-04-04 00:46:46 +08:00
|
|
|
else ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
|
2015-02-03 22:21:46 +08:00
|
|
|
KERNEL_SOURCE_CONFIG = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE))
|
2011-07-12 04:46:08 +08:00
|
|
|
endif
|
|
|
|
|
|
2015-02-03 22:21:47 +08:00
|
|
|
LINUX_KCONFIG_FILE = $(KERNEL_SOURCE_CONFIG)
|
|
|
|
|
LINUX_KCONFIG_EDITORS = menuconfig xconfig gconfig nconfig
|
|
|
|
|
LINUX_KCONFIG_OPTS = $(LINUX_MAKE_FLAGS)
|
|
|
|
|
|
|
|
|
|
define LINUX_KCONFIG_FIXUP_CMDS
|
2013-07-14 06:27:30 +08:00
|
|
|
$(if $(BR2_arm)$(BR2_armeb),
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_AEABI,$(@D)/.config))
|
2013-12-30 01:33:45 +08:00
|
|
|
$(if $(BR2_TARGET_ROOTFS_CPIO),
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_BLK_DEV_INITRD,$(@D)/.config))
|
linux: add support for initramfs
In Buildroot, the kernel is built and installed *before* the root
filesystems are built. This allows the root filesystem to correctly
contain the kernel modules that have been installed.
However, in the initramfs case, the root filesystem is part of the
kernel. Therefore, the kernel should be built *after* the root
filesystem (which, in the initramfs case simply builds a text file
listing all files/directories/devices/symlinks that should be part of
the initramfs). However, this isn't possible as the initramfs text
file would lack all kernel modules.
So, the solution choosen here is to keep the normal order: kernel is
built before the root filesystem is generated, and to add a little
quirk to retrigger a kernel compilation after the root filesystem
generation.
To do so, we add a ROOTFS_$(FSTYPE)_POST_TARGETS variable to the
fs/common.mk infrastructure. This allows individual filesystems to set
a target name that we should depend on *after* generating the root
filesystem itself (contrary to normal ROOTFS_$(FSTYPE)_DEPENDENCIES,
on which we depend *before* generating the root filesystem).
The initramfs code in fs/initramfs/initramfs.mk uses this to add a
dependency on 'linux26-rebuild-with-initramfs'.
In linux/linux.mk, we do various things :
* If BR2_TARGET_ROOTFS_INITRAMFS is enabled (i.e if initramfs is
enabled as a root filesystem type), then we create an empty
rootfs.initramfs file (remember that at this point, the root
filesystem hasn't been generated) and we adjust the kernel
configuration to include an initramfs. Of course, in the initial
kernel build, this initramfs will be empty.
* In the linux26-rebuild-with-initramfs target, we retrigger a
compilation of the kernel image, after removing the initramfs in
the kernel sources to make sure it gets properly rebuilt (we've
experienced cases were modifying the rootfs.initramfs file wouldn't
retrigger the generation of the initramfs at the kernel level).
This is fairly quirky, but initramfs really is a special case, so in
one way or another, we need a little quirk to solve its specialness.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-06-14 01:19:38 +08:00
|
|
|
# As the kernel gets compiled before root filesystems are
|
2011-09-07 05:16:09 +08:00
|
|
|
# built, we create a fake cpio file. It'll be
|
|
|
|
|
# replaced later by the real cpio archive, and the kernel will be
|
2014-07-25 01:49:34 +08:00
|
|
|
# rebuilt using the linux-rebuild-with-initramfs target.
|
2011-07-12 04:46:08 +08:00
|
|
|
$(if $(BR2_TARGET_ROOTFS_INITRAMFS),
|
2011-09-07 05:16:09 +08:00
|
|
|
touch $(BINARIES_DIR)/rootfs.cpio
|
linux: avoid unnecessary changes in defconfig for INITRAMFS_SOURCE
When Buildroot is configured to append the root filesystem to the Linux
kernel as initramfs, Buildroot sets the path to the initramfs source
dynamically in the Linux configuration file.
As this path is specified as an absolute path, typically being different
for different users of the same project (e.g. containing a username),
saving the configuration to a version control system (for example using
'make linux-update-defconfig') would result in a difference for this
path at every invocation by a different user.
Although this is technically not an issue, it is confusing that this
generates a difference.
Address this issue by using a not-yet-expanded make variable to specify
the path to the initramfs source. That variable will be expanded by the
Linux build system, which uses it both as a Makefile variable and a
shell variable; thus, it needs to be specified in LINUX_MAKE_ENV (so
it is exported and available in sub-processes of make). Any saved
configuration file would simply contain the reference to the
not-yet-expanded variable.
As in the Linux build system, the config variables are both read from
make as from a shell script, we cannot use $() syntax as this would be
interpreted as a command invocation by the shell. Instead, use ${}
syntax which is interpreted as variable reference both by the shell as
by make.
[Thomas:
- Really make the patch work by using $(LINUX_MAKE_ENV) instead of
$(TARGET_MAKE_ENV). Otherwise, the new BR2_BINARIES_DIR variable is
not passed at all stages of the build process, which makes the
build fail when an initramfs is used.]
Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: "Yann E. Morin" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2015-02-03 22:21:48 +08:00
|
|
|
$(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_SOURCE,"$${BR_BINARIES_DIR}/rootfs.cpio",$(@D)/.config)
|
2011-07-12 04:46:08 +08:00
|
|
|
$(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_UID,0,$(@D)/.config)
|
linux: Do not force GZIP initramfs compression
Initramfs compression does not make much sense for the architectures
that support compressed kernel images because in this case the data
would be compressed twice. This will eventually result in a bigger
kernel image and time overhead when uncompressing it.
The only reason to use compressed initramfs is to reduce memory
usage when the kernel prepares rootfs, and both the unpacked
filesystem and initramfs.cpio are present in the memory.
Buildroot attempts to force GZIP compression for initramfs,
however it doesn't always work because initramfs compression mode
depends on RAM disk compression supported by the kernel.
Thus, CONFIG_INITRAMFS_COMPRESSION_GZIP depends on CONFIG_RD_GZIP.
If CONFIG_RD_GZIP is not set, setting GZIP initramfs compression
will have no effect.
Besides, the kernel also supports other compression methods,
like BZIP2, LZMA, XZ and LZO. Forcing the good old GZIP does not
really make much sense any more.
This removes initramfs compression settings from Buildroot,
so that the default value preset in the kernel config is used,
which is CONFIG_INITRAMFS_COMPRESSION_NONE.
If initramfs compression is still needed, it can be set
in the kernel config (using make linux-menuconfig)
Signed-off-by: Valentine Barshak <gvaxon@gmail.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2012-10-10 07:34:56 +08:00
|
|
|
$(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_GID,0,$(@D)/.config))
|
2011-07-12 04:46:08 +08:00
|
|
|
$(if $(BR2_ROOTFS_DEVICE_CREATION_STATIC),,
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS,$(@D)/.config)
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS_MOUNT,$(@D)/.config))
|
2014-02-07 21:21:32 +08:00
|
|
|
$(if $(BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV),
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_INOTIFY_USER,$(@D)/.config))
|
2013-12-16 18:53:20 +08:00
|
|
|
$(if $(BR2_PACKAGE_KTAP),
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_DEBUG_FS,$(@D)/.config)
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_EVENT_TRACING,$(@D)/.config)
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_PERF_EVENTS,$(@D)/.config)
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_FUNCTION_TRACER,$(@D)/.config))
|
2012-03-23 23:49:53 +08:00
|
|
|
$(if $(BR2_PACKAGE_SYSTEMD),
|
2014-02-07 21:21:34 +08:00
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_CGROUPS,$(@D)/.config)
|
2014-02-24 17:25:42 +08:00
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_INOTIFY_USER,$(@D)/.config)
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_FHANDLE,$(@D)/.config)
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_AUTOFS4_FS,$(@D)/.config)
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_TMPFS_POSIX_ACL,$(@D)/.config)
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_TMPFS_POSIX_XATTR,$(@D)/.config))
|
2014-04-21 02:54:03 +08:00
|
|
|
$(if $(BR2_PACKAGE_SMACK),
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY,$(@D)/.config)
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY_SMACK,$(@D)/.config)
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY_NETWORK,$(@D)/.config))
|
2014-10-22 05:10:51 +08:00
|
|
|
$(if $(BR2_PACKAGE_IPTABLES),
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_IP_NF_IPTABLES,$(@D)/.config)
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_IP_NF_FILTER,$(@D)/.config)
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_NETFILTER,$(@D)/.config)
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_NETFILTER_XTABLES,$(@D)/.config))
|
2014-10-22 05:10:52 +08:00
|
|
|
$(if $(BR2_PACKAGE_XTABLES_ADDONS),
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_NF_CONNTRACK,$(@D)/.config)
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_NF_CONNTRACK_MARK,$(@D)/.config))
|
2012-07-30 20:32:47 +08:00
|
|
|
$(if $(BR2_LINUX_KERNEL_APPENDED_DTB),
|
|
|
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_ARM_APPENDED_DTB,$(@D)/.config))
|
2011-07-12 04:46:08 +08:00
|
|
|
endef
|
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>
2010-04-04 00:46:46 +08:00
|
|
|
|
2012-07-30 20:32:45 +08:00
|
|
|
ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT),y)
|
2012-07-30 20:32:47 +08:00
|
|
|
ifeq ($(BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT),)
|
2012-07-30 20:32:45 +08:00
|
|
|
define LINUX_BUILD_DTB
|
linux: avoid unnecessary changes in defconfig for INITRAMFS_SOURCE
When Buildroot is configured to append the root filesystem to the Linux
kernel as initramfs, Buildroot sets the path to the initramfs source
dynamically in the Linux configuration file.
As this path is specified as an absolute path, typically being different
for different users of the same project (e.g. containing a username),
saving the configuration to a version control system (for example using
'make linux-update-defconfig') would result in a difference for this
path at every invocation by a different user.
Although this is technically not an issue, it is confusing that this
generates a difference.
Address this issue by using a not-yet-expanded make variable to specify
the path to the initramfs source. That variable will be expanded by the
Linux build system, which uses it both as a Makefile variable and a
shell variable; thus, it needs to be specified in LINUX_MAKE_ENV (so
it is exported and available in sub-processes of make). Any saved
configuration file would simply contain the reference to the
not-yet-expanded variable.
As in the Linux build system, the config variables are both read from
make as from a shell script, we cannot use $() syntax as this would be
interpreted as a command invocation by the shell. Instead, use ${}
syntax which is interpreted as variable reference both by the shell as
by make.
[Thomas:
- Really make the patch work by using $(LINUX_MAKE_ENV) instead of
$(TARGET_MAKE_ENV). Otherwise, the new BR2_BINARIES_DIR variable is
not passed at all stages of the build process, which makes the
build fail when an initramfs is used.]
Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: "Yann E. Morin" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2015-02-03 22:21:48 +08:00
|
|
|
$(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(KERNEL_DTBS)
|
2012-07-30 20:32:45 +08:00
|
|
|
endef
|
|
|
|
|
define LINUX_INSTALL_DTB
|
2013-04-15 01:31:30 +08:00
|
|
|
# dtbs moved from arch/<ARCH>/boot to arch/<ARCH>/boot/dts since 3.8-rc1
|
2012-12-21 16:07:45 +08:00
|
|
|
cp $(addprefix \
|
|
|
|
|
$(KERNEL_ARCH_PATH)/boot/$(if $(wildcard \
|
|
|
|
|
$(addprefix $(KERNEL_ARCH_PATH)/boot/dts/,$(KERNEL_DTBS))),dts/),$(KERNEL_DTBS)) \
|
2012-12-20 06:48:09 +08:00
|
|
|
$(BINARIES_DIR)/
|
2012-07-30 20:32:45 +08:00
|
|
|
endef
|
2013-02-14 12:27:54 +08:00
|
|
|
define LINUX_INSTALL_DTB_TARGET
|
2013-04-15 01:31:30 +08:00
|
|
|
# dtbs moved from arch/<ARCH>/boot to arch/<ARCH>/boot/dts since 3.8-rc1
|
2013-02-14 12:27:54 +08:00
|
|
|
cp $(addprefix \
|
|
|
|
|
$(KERNEL_ARCH_PATH)/boot/$(if $(wildcard \
|
|
|
|
|
$(addprefix $(KERNEL_ARCH_PATH)/boot/dts/,$(KERNEL_DTBS))),dts/),$(KERNEL_DTBS)) \
|
|
|
|
|
$(TARGET_DIR)/boot/
|
|
|
|
|
endef
|
2012-07-30 20:32:45 +08:00
|
|
|
endif
|
2012-07-30 20:32:47 +08:00
|
|
|
endif
|
|
|
|
|
|
2013-01-08 19:23:56 +08:00
|
|
|
ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y)
|
|
|
|
|
# dtbs moved from arch/$ARCH/boot to arch/$ARCH/boot/dts since 3.8-rc1
|
2012-07-30 20:32:47 +08:00
|
|
|
define LINUX_APPEND_DTB
|
2013-01-08 19:23:56 +08:00
|
|
|
if [ -e $(KERNEL_ARCH_PATH)/boot/$(KERNEL_DTS_NAME).dtb ]; then \
|
|
|
|
|
cat $(KERNEL_ARCH_PATH)/boot/$(KERNEL_DTS_NAME).dtb; \
|
|
|
|
|
else \
|
|
|
|
|
cat $(KERNEL_ARCH_PATH)/boot/dts/$(KERNEL_DTS_NAME).dtb; \
|
|
|
|
|
fi >> $(KERNEL_ARCH_PATH)/boot/zImage
|
2012-07-30 20:32:47 +08:00
|
|
|
endef
|
2013-01-08 19:23:56 +08:00
|
|
|
ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y)
|
2013-06-07 21:21:43 +08:00
|
|
|
# We need to generate a new u-boot image that takes into
|
|
|
|
|
# account the extra-size added by the device tree at the end
|
|
|
|
|
# of the image. To do so, we first need to retrieve both load
|
|
|
|
|
# address and entry point for the kernel from the already
|
|
|
|
|
# generate uboot image before using mkimage -l.
|
2013-11-07 07:12:35 +08:00
|
|
|
LINUX_APPEND_DTB += $(sep) MKIMAGE_ARGS=`$(MKIMAGE) -l $(LINUX_IMAGE_PATH) |\
|
2014-10-26 02:29:31 +08:00
|
|
|
sed -n -e 's/Image Name:[ ]*\(.*\)/-n \1/p' -e 's/Load Address:/-a/p' -e 's/Entry Point:/-e/p'`; \
|
|
|
|
|
$(MKIMAGE) -A $(MKIMAGE_ARCH) -O linux \
|
|
|
|
|
-T kernel -C none $${MKIMAGE_ARGS} \
|
|
|
|
|
-d $(KERNEL_ARCH_PATH)/boot/zImage $(LINUX_IMAGE_PATH);
|
2013-01-08 19:23:56 +08:00
|
|
|
endif
|
2012-07-30 20:32:47 +08:00
|
|
|
endif
|
2012-07-30 20:32:45 +08:00
|
|
|
|
2010-06-14 01:18:34 +08:00
|
|
|
# Compilation. We make sure the kernel gets rebuilt when the
|
|
|
|
|
# configuration has changed.
|
2011-07-12 04:46:08 +08:00
|
|
|
define LINUX_BUILD_CMDS
|
2012-07-30 20:32:45 +08:00
|
|
|
$(if $(BR2_LINUX_KERNEL_USE_CUSTOM_DTS),
|
2014-07-26 05:25:32 +08:00
|
|
|
cp $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH)) $(KERNEL_ARCH_PATH)/boot/dts/)
|
linux: avoid unnecessary changes in defconfig for INITRAMFS_SOURCE
When Buildroot is configured to append the root filesystem to the Linux
kernel as initramfs, Buildroot sets the path to the initramfs source
dynamically in the Linux configuration file.
As this path is specified as an absolute path, typically being different
for different users of the same project (e.g. containing a username),
saving the configuration to a version control system (for example using
'make linux-update-defconfig') would result in a difference for this
path at every invocation by a different user.
Although this is technically not an issue, it is confusing that this
generates a difference.
Address this issue by using a not-yet-expanded make variable to specify
the path to the initramfs source. That variable will be expanded by the
Linux build system, which uses it both as a Makefile variable and a
shell variable; thus, it needs to be specified in LINUX_MAKE_ENV (so
it is exported and available in sub-processes of make). Any saved
configuration file would simply contain the reference to the
not-yet-expanded variable.
As in the Linux build system, the config variables are both read from
make as from a shell script, we cannot use $() syntax as this would be
interpreted as a command invocation by the shell. Instead, use ${}
syntax which is interpreted as variable reference both by the shell as
by make.
[Thomas:
- Really make the patch work by using $(LINUX_MAKE_ENV) instead of
$(TARGET_MAKE_ENV). Otherwise, the new BR2_BINARIES_DIR variable is
not passed at all stages of the build process, which makes the
build fail when an initramfs is used.]
Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: "Yann E. Morin" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2015-02-03 22:21:48 +08:00
|
|
|
$(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_TARGET_NAME)
|
2011-07-08 05:40:09 +08:00
|
|
|
@if grep -q "CONFIG_MODULES=y" $(@D)/.config; then \
|
linux: avoid unnecessary changes in defconfig for INITRAMFS_SOURCE
When Buildroot is configured to append the root filesystem to the Linux
kernel as initramfs, Buildroot sets the path to the initramfs source
dynamically in the Linux configuration file.
As this path is specified as an absolute path, typically being different
for different users of the same project (e.g. containing a username),
saving the configuration to a version control system (for example using
'make linux-update-defconfig') would result in a difference for this
path at every invocation by a different user.
Although this is technically not an issue, it is confusing that this
generates a difference.
Address this issue by using a not-yet-expanded make variable to specify
the path to the initramfs source. That variable will be expanded by the
Linux build system, which uses it both as a Makefile variable and a
shell variable; thus, it needs to be specified in LINUX_MAKE_ENV (so
it is exported and available in sub-processes of make). Any saved
configuration file would simply contain the reference to the
not-yet-expanded variable.
As in the Linux build system, the config variables are both read from
make as from a shell script, we cannot use $() syntax as this would be
interpreted as a command invocation by the shell. Instead, use ${}
syntax which is interpreted as variable reference both by the shell as
by make.
[Thomas:
- Really make the patch work by using $(LINUX_MAKE_ENV) instead of
$(TARGET_MAKE_ENV). Otherwise, the new BR2_BINARIES_DIR variable is
not passed at all stages of the build process, which makes the
build fail when an initramfs is used.]
Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: "Yann E. Morin" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2015-02-03 22:21:48 +08:00
|
|
|
$(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) modules ; \
|
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>
2010-04-04 00:46:46 +08:00
|
|
|
fi
|
2012-07-30 20:32:45 +08:00
|
|
|
$(LINUX_BUILD_DTB)
|
2012-07-30 20:32:47 +08:00
|
|
|
$(LINUX_APPEND_DTB)
|
2011-07-12 04:46:08 +08:00
|
|
|
endef
|
|
|
|
|
|
New, simpler, infrastructure for building the Linux kernel
This patch introduces a single, simple, infrastructure to build the
Linux kernel. The configuration is limited to :
* Kernel version: a fixed recent stable version, same as kernel
headers version (for internal toolchains only), custom stable
version, or custom tarball URL
* Kernel patch: either a local file, directory or an URL
* Kernel configuration: either the name of a defconfig or the
location of a custom configuration file
* Kernel image: either uImage, bzImage, zImage or vmlinux.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-04-04 00:46:46 +08:00
|
|
|
|
2011-07-06 03:53:54 +08:00
|
|
|
ifeq ($(BR2_LINUX_KERNEL_INSTALL_TARGET),y)
|
2011-07-12 04:46:08 +08:00
|
|
|
define LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET
|
2011-07-12 04:46:07 +08:00
|
|
|
install -m 0644 -D $(LINUX_IMAGE_PATH) $(TARGET_DIR)/boot/$(LINUX_IMAGE_NAME)
|
2013-02-14 12:27:54 +08:00
|
|
|
$(LINUX_INSTALL_DTB_TARGET)
|
2011-07-12 04:46:08 +08:00
|
|
|
endef
|
2011-07-06 03:53:54 +08:00
|
|
|
endif
|
2011-07-12 04:46:08 +08:00
|
|
|
|
2012-05-15 16:18:25 +08:00
|
|
|
|
|
|
|
|
define LINUX_INSTALL_HOST_TOOLS
|
|
|
|
|
# Installing dtc (device tree compiler) as host tool, if selected
|
|
|
|
|
if grep -q "CONFIG_DTC=y" $(@D)/.config; then \
|
|
|
|
|
$(INSTALL) -D -m 0755 $(@D)/scripts/dtc/dtc $(HOST_DIR)/usr/bin/dtc ; \
|
|
|
|
|
fi
|
|
|
|
|
endef
|
|
|
|
|
|
|
|
|
|
|
2011-07-12 04:46:08 +08:00
|
|
|
define LINUX_INSTALL_IMAGES_CMDS
|
2011-07-12 04:46:07 +08:00
|
|
|
cp $(LINUX_IMAGE_PATH) $(BINARIES_DIR)
|
2013-03-28 07:01:15 +08:00
|
|
|
$(LINUX_INSTALL_DTB)
|
2011-07-12 04:46:08 +08:00
|
|
|
endef
|
|
|
|
|
|
|
|
|
|
define LINUX_INSTALL_TARGET_CMDS
|
|
|
|
|
$(LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET)
|
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>
2010-04-04 00:46:46 +08:00
|
|
|
# Install modules and remove symbolic links pointing to build
|
|
|
|
|
# directories, not relevant on the target
|
2011-07-08 05:40:09 +08:00
|
|
|
@if grep -q "CONFIG_MODULES=y" $(@D)/.config; then \
|
linux: avoid unnecessary changes in defconfig for INITRAMFS_SOURCE
When Buildroot is configured to append the root filesystem to the Linux
kernel as initramfs, Buildroot sets the path to the initramfs source
dynamically in the Linux configuration file.
As this path is specified as an absolute path, typically being different
for different users of the same project (e.g. containing a username),
saving the configuration to a version control system (for example using
'make linux-update-defconfig') would result in a difference for this
path at every invocation by a different user.
Although this is technically not an issue, it is confusing that this
generates a difference.
Address this issue by using a not-yet-expanded make variable to specify
the path to the initramfs source. That variable will be expanded by the
Linux build system, which uses it both as a Makefile variable and a
shell variable; thus, it needs to be specified in LINUX_MAKE_ENV (so
it is exported and available in sub-processes of make). Any saved
configuration file would simply contain the reference to the
not-yet-expanded variable.
As in the Linux build system, the config variables are both read from
make as from a shell script, we cannot use $() syntax as this would be
interpreted as a command invocation by the shell. Instead, use ${}
syntax which is interpreted as variable reference both by the shell as
by make.
[Thomas:
- Really make the patch work by using $(LINUX_MAKE_ENV) instead of
$(TARGET_MAKE_ENV). Otherwise, the new BR2_BINARIES_DIR variable is
not passed at all stages of the build process, which makes the
build fail when an initramfs is used.]
Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: "Yann E. Morin" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2015-02-03 22:21:48 +08:00
|
|
|
$(LINUX_MAKE_ENV) $(MAKE1) $(LINUX_MAKE_FLAGS) -C $(@D) modules_install; \
|
2011-07-12 04:46:07 +08:00
|
|
|
rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/build ; \
|
|
|
|
|
rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/source ; \
|
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>
2010-04-04 00:46:46 +08:00
|
|
|
fi
|
2012-05-15 16:18:25 +08:00
|
|
|
$(LINUX_INSTALL_HOST_TOOLS)
|
2011-07-12 04:46:08 +08:00
|
|
|
endef
|
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>
2010-04-04 00:46:46 +08:00
|
|
|
|
2015-03-14 02:57:28 +08:00
|
|
|
# Note: our package infrastructure uses the full-path of the last-scanned
|
|
|
|
|
# Makefile to determine what package we're currently defining, using the
|
|
|
|
|
# last directory component in the path. As such, including other Makefile,
|
|
|
|
|
# like below, before we call one of the *-package macro is usally not
|
|
|
|
|
# working.
|
|
|
|
|
# However, since the files we include here are in the same directory as
|
|
|
|
|
# the current Makefile, we are OK. But this is a hard requirement: files
|
|
|
|
|
# included here *must* be in the same directory!
|
2013-09-03 16:45:41 +08:00
|
|
|
include $(sort $(wildcard linux/linux-ext-*.mk))
|
2011-09-18 04:22:51 +08:00
|
|
|
|
2015-02-03 22:21:47 +08:00
|
|
|
$(eval $(kconfig-package))
|
2011-10-14 22:56:56 +08:00
|
|
|
|
2011-09-07 05:16:09 +08:00
|
|
|
# Support for rebuilding the kernel after the cpio archive has
|
|
|
|
|
# been generated in $(BINARIES_DIR)/rootfs.cpio.
|
|
|
|
|
$(LINUX_DIR)/.stamp_initramfs_rebuilt: $(LINUX_DIR)/.stamp_target_installed $(LINUX_DIR)/.stamp_images_installed $(BINARIES_DIR)/rootfs.cpio
|
linux: add support for initramfs
In Buildroot, the kernel is built and installed *before* the root
filesystems are built. This allows the root filesystem to correctly
contain the kernel modules that have been installed.
However, in the initramfs case, the root filesystem is part of the
kernel. Therefore, the kernel should be built *after* the root
filesystem (which, in the initramfs case simply builds a text file
listing all files/directories/devices/symlinks that should be part of
the initramfs). However, this isn't possible as the initramfs text
file would lack all kernel modules.
So, the solution choosen here is to keep the normal order: kernel is
built before the root filesystem is generated, and to add a little
quirk to retrigger a kernel compilation after the root filesystem
generation.
To do so, we add a ROOTFS_$(FSTYPE)_POST_TARGETS variable to the
fs/common.mk infrastructure. This allows individual filesystems to set
a target name that we should depend on *after* generating the root
filesystem itself (contrary to normal ROOTFS_$(FSTYPE)_DEPENDENCIES,
on which we depend *before* generating the root filesystem).
The initramfs code in fs/initramfs/initramfs.mk uses this to add a
dependency on 'linux26-rebuild-with-initramfs'.
In linux/linux.mk, we do various things :
* If BR2_TARGET_ROOTFS_INITRAMFS is enabled (i.e if initramfs is
enabled as a root filesystem type), then we create an empty
rootfs.initramfs file (remember that at this point, the root
filesystem hasn't been generated) and we adjust the kernel
configuration to include an initramfs. Of course, in the initial
kernel build, this initramfs will be empty.
* In the linux26-rebuild-with-initramfs target, we retrigger a
compilation of the kernel image, after removing the initramfs in
the kernel sources to make sure it gets properly rebuilt (we've
experienced cases were modifying the rootfs.initramfs file wouldn't
retrigger the generation of the initramfs at the kernel level).
This is fairly quirky, but initramfs really is a special case, so in
one way or another, we need a little quirk to solve its specialness.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-06-14 01:19:38 +08:00
|
|
|
@$(call MESSAGE,"Rebuilding kernel with initramfs")
|
|
|
|
|
# Build the kernel.
|
linux: avoid unnecessary changes in defconfig for INITRAMFS_SOURCE
When Buildroot is configured to append the root filesystem to the Linux
kernel as initramfs, Buildroot sets the path to the initramfs source
dynamically in the Linux configuration file.
As this path is specified as an absolute path, typically being different
for different users of the same project (e.g. containing a username),
saving the configuration to a version control system (for example using
'make linux-update-defconfig') would result in a difference for this
path at every invocation by a different user.
Although this is technically not an issue, it is confusing that this
generates a difference.
Address this issue by using a not-yet-expanded make variable to specify
the path to the initramfs source. That variable will be expanded by the
Linux build system, which uses it both as a Makefile variable and a
shell variable; thus, it needs to be specified in LINUX_MAKE_ENV (so
it is exported and available in sub-processes of make). Any saved
configuration file would simply contain the reference to the
not-yet-expanded variable.
As in the Linux build system, the config variables are both read from
make as from a shell script, we cannot use $() syntax as this would be
interpreted as a command invocation by the shell. Instead, use ${}
syntax which is interpreted as variable reference both by the shell as
by make.
[Thomas:
- Really make the patch work by using $(LINUX_MAKE_ENV) instead of
$(TARGET_MAKE_ENV). Otherwise, the new BR2_BINARIES_DIR variable is
not passed at all stages of the build process, which makes the
build fail when an initramfs is used.]
Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: "Yann E. Morin" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2015-02-03 22:21:48 +08:00
|
|
|
$(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_TARGET_NAME)
|
2013-07-31 23:47:36 +08:00
|
|
|
$(LINUX_APPEND_DTB)
|
linux: add support for initramfs
In Buildroot, the kernel is built and installed *before* the root
filesystems are built. This allows the root filesystem to correctly
contain the kernel modules that have been installed.
However, in the initramfs case, the root filesystem is part of the
kernel. Therefore, the kernel should be built *after* the root
filesystem (which, in the initramfs case simply builds a text file
listing all files/directories/devices/symlinks that should be part of
the initramfs). However, this isn't possible as the initramfs text
file would lack all kernel modules.
So, the solution choosen here is to keep the normal order: kernel is
built before the root filesystem is generated, and to add a little
quirk to retrigger a kernel compilation after the root filesystem
generation.
To do so, we add a ROOTFS_$(FSTYPE)_POST_TARGETS variable to the
fs/common.mk infrastructure. This allows individual filesystems to set
a target name that we should depend on *after* generating the root
filesystem itself (contrary to normal ROOTFS_$(FSTYPE)_DEPENDENCIES,
on which we depend *before* generating the root filesystem).
The initramfs code in fs/initramfs/initramfs.mk uses this to add a
dependency on 'linux26-rebuild-with-initramfs'.
In linux/linux.mk, we do various things :
* If BR2_TARGET_ROOTFS_INITRAMFS is enabled (i.e if initramfs is
enabled as a root filesystem type), then we create an empty
rootfs.initramfs file (remember that at this point, the root
filesystem hasn't been generated) and we adjust the kernel
configuration to include an initramfs. Of course, in the initial
kernel build, this initramfs will be empty.
* In the linux26-rebuild-with-initramfs target, we retrigger a
compilation of the kernel image, after removing the initramfs in
the kernel sources to make sure it gets properly rebuilt (we've
experienced cases were modifying the rootfs.initramfs file wouldn't
retrigger the generation of the initramfs at the kernel level).
This is fairly quirky, but initramfs really is a special case, so in
one way or another, we need a little quirk to solve its specialness.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-06-14 01:19:38 +08:00
|
|
|
# Copy the kernel image to its final destination
|
2011-07-12 04:46:07 +08:00
|
|
|
cp $(LINUX_IMAGE_PATH) $(BINARIES_DIR)
|
2012-03-17 17:46:55 +08:00
|
|
|
# If there is a .ub file copy it to the final destination
|
2012-03-21 09:19:04 +08:00
|
|
|
test ! -f $(LINUX_IMAGE_PATH).ub || cp $(LINUX_IMAGE_PATH).ub $(BINARIES_DIR)
|
linux: add support for initramfs
In Buildroot, the kernel is built and installed *before* the root
filesystems are built. This allows the root filesystem to correctly
contain the kernel modules that have been installed.
However, in the initramfs case, the root filesystem is part of the
kernel. Therefore, the kernel should be built *after* the root
filesystem (which, in the initramfs case simply builds a text file
listing all files/directories/devices/symlinks that should be part of
the initramfs). However, this isn't possible as the initramfs text
file would lack all kernel modules.
So, the solution choosen here is to keep the normal order: kernel is
built before the root filesystem is generated, and to add a little
quirk to retrigger a kernel compilation after the root filesystem
generation.
To do so, we add a ROOTFS_$(FSTYPE)_POST_TARGETS variable to the
fs/common.mk infrastructure. This allows individual filesystems to set
a target name that we should depend on *after* generating the root
filesystem itself (contrary to normal ROOTFS_$(FSTYPE)_DEPENDENCIES,
on which we depend *before* generating the root filesystem).
The initramfs code in fs/initramfs/initramfs.mk uses this to add a
dependency on 'linux26-rebuild-with-initramfs'.
In linux/linux.mk, we do various things :
* If BR2_TARGET_ROOTFS_INITRAMFS is enabled (i.e if initramfs is
enabled as a root filesystem type), then we create an empty
rootfs.initramfs file (remember that at this point, the root
filesystem hasn't been generated) and we adjust the kernel
configuration to include an initramfs. Of course, in the initial
kernel build, this initramfs will be empty.
* In the linux26-rebuild-with-initramfs target, we retrigger a
compilation of the kernel image, after removing the initramfs in
the kernel sources to make sure it gets properly rebuilt (we've
experienced cases were modifying the rootfs.initramfs file wouldn't
retrigger the generation of the initramfs at the kernel level).
This is fairly quirky, but initramfs really is a special case, so in
one way or another, we need a little quirk to solve its specialness.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-06-14 01:19:38 +08:00
|
|
|
$(Q)touch $@
|
|
|
|
|
|
|
|
|
|
# The initramfs building code must make sure this target gets called
|
|
|
|
|
# after it generated the initramfs list of files.
|
2014-07-25 01:49:34 +08:00
|
|
|
linux-rebuild-with-initramfs: $(LINUX_DIR)/.stamp_initramfs_rebuilt
|
linux: add support for initramfs
In Buildroot, the kernel is built and installed *before* the root
filesystems are built. This allows the root filesystem to correctly
contain the kernel modules that have been installed.
However, in the initramfs case, the root filesystem is part of the
kernel. Therefore, the kernel should be built *after* the root
filesystem (which, in the initramfs case simply builds a text file
listing all files/directories/devices/symlinks that should be part of
the initramfs). However, this isn't possible as the initramfs text
file would lack all kernel modules.
So, the solution choosen here is to keep the normal order: kernel is
built before the root filesystem is generated, and to add a little
quirk to retrigger a kernel compilation after the root filesystem
generation.
To do so, we add a ROOTFS_$(FSTYPE)_POST_TARGETS variable to the
fs/common.mk infrastructure. This allows individual filesystems to set
a target name that we should depend on *after* generating the root
filesystem itself (contrary to normal ROOTFS_$(FSTYPE)_DEPENDENCIES,
on which we depend *before* generating the root filesystem).
The initramfs code in fs/initramfs/initramfs.mk uses this to add a
dependency on 'linux26-rebuild-with-initramfs'.
In linux/linux.mk, we do various things :
* If BR2_TARGET_ROOTFS_INITRAMFS is enabled (i.e if initramfs is
enabled as a root filesystem type), then we create an empty
rootfs.initramfs file (remember that at this point, the root
filesystem hasn't been generated) and we adjust the kernel
configuration to include an initramfs. Of course, in the initial
kernel build, this initramfs will be empty.
* In the linux26-rebuild-with-initramfs target, we retrigger a
compilation of the kernel image, after removing the initramfs in
the kernel sources to make sure it gets properly rebuilt (we've
experienced cases were modifying the rootfs.initramfs file wouldn't
retrigger the generation of the initramfs at the kernel level).
This is fairly quirky, but initramfs really is a special case, so in
one way or another, we need a little quirk to solve its specialness.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2010-06-14 01:19:38 +08:00
|
|
|
|
2010-07-29 21:40:28 +08:00
|
|
|
# Checks to give errors that the user can understand
|
2010-09-28 20:43:25 +08:00
|
|
|
ifeq ($(filter source,$(MAKECMDGOALS)),)
|
2010-07-29 21:40:28 +08:00
|
|
|
ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
|
|
|
|
|
ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG)),)
|
|
|
|
|
$(error No kernel defconfig name specified, check your BR2_LINUX_KERNEL_DEFCONFIG setting)
|
|
|
|
|
endif
|
|
|
|
|
endif
|
|
|
|
|
|
|
|
|
|
ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
|
|
|
|
|
ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE)),)
|
|
|
|
|
$(error No kernel configuration file specified, check your BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE setting)
|
|
|
|
|
endif
|
2010-09-28 20:43:25 +08:00
|
|
|
endif
|
|
|
|
|
|
|
|
|
|
endif
|
