1eca624c03
Add support for building toolchains against custom headers. Allows the selection of a manual version, custom tarball or custom git repository for the kernel headers. This enables toolchains to be built against custom kernel headers without having to build a full kernel. This is particularly useful for new architectures, such as RISC-V where updated kernel headers may not have made it into the mainline kernel yet. Signed-off-by: Mark Corbin <mark.corbin@embecosm.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
150 lines
5.9 KiB
Makefile
150 lines
5.9 KiB
Makefile
################################################################################
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#
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# linux-headers
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#
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################################################################################
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# This package is used to provide Linux kernel headers for the
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# internal toolchain backend.
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# Set variables depending on whether we are using headers from a kernel
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# build or a standalone header package.
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ifeq ($(BR2_KERNEL_HEADERS_AS_KERNEL),y)
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LINUX_HEADERS_CUSTOM_TARBALL = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_TARBALL))
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LINUX_HEADERS_CUSTOM_GIT = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_GIT))
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LINUX_HEADERS_CUSTOM_HG = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_HG))
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LINUX_HEADERS_CUSTOM_SVN = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_SVN))
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LINUX_HEADERS_VERSION = $(call qstrip,$(BR2_LINUX_KERNEL_VERSION))
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LINUX_HEADERS_CUSTOM_TARBALL_LOCATION = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION))
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LINUX_HEADERS_REPO_URL = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
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else # ! BR2_KERNEL_HEADERS_AS_KERNEL
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LINUX_HEADERS_CUSTOM_TARBALL = $(call qstrip,$(BR2_KERNEL_HEADERS_CUSTOM_TARBALL))
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LINUX_HEADERS_CUSTOM_GIT = $(call qstrip,$(BR2_KERNEL_HEADERS_CUSTOM_GIT))
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LINUX_HEADERS_CUSTOM_HG =
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LINUX_HEADERS_CUSTOM_SVN =
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LINUX_HEADERS_VERSION = $(call qstrip,$(BR2_DEFAULT_KERNEL_HEADERS))
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LINUX_HEADERS_CUSTOM_TARBALL_LOCATION = $(call qstrip,$(BR2_KERNEL_HEADERS_CUSTOM_TARBALL_LOCATION))
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LINUX_HEADERS_REPO_URL = $(call qstrip,$(BR2_KERNEL_HEADERS_CUSTOM_REPO_URL))
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endif # BR2_KERNEL_HEADERS_AS_KERNEL
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# Configure tarball filenames.
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ifeq ($(LINUX_HEADERS_CUSTOM_TARBALL),y)
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LINUX_HEADERS_SOURCE = $(notdir $(LINUX_HEADERS_CUSTOM_TARBALL_LOCATION))
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else ifeq ($(LINUX_HEADERS_CUSTOM_GIT)$(LINUX_HEADERS_CUSTOM_HG)$(LINUX_HEADERS_CUSTOM_SVN),y)
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LINUX_HEADERS_SOURCE = linux-$(LINUX_HEADERS_VERSION).tar.gz
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else
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LINUX_HEADERS_SOURCE = linux-$(LINUX_HEADERS_VERSION).tar.xz
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endif
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# Configure the various kernel source locations.
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ifeq ($(LINUX_HEADERS_CUSTOM_TARBALL),y)
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LINUX_HEADERS_SITE = $(patsubst %/,%,$(dir $(LINUX_HEADERS_CUSTOM_TARBALL_LOCATION)))
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else ifeq ($(LINUX_HEADERS_CUSTOM_GIT),y)
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LINUX_HEADERS_SITE = $(LINUX_HEADERS_REPO_URL)
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LINUX_HEADERS_SITE_METHOD = git
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else ifeq ($(LINUX_HEADERS_CUSTOM_HG),y)
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LINUX_HEADERS_SITE = $(LINUX_HEADERS_REPO_URL)
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LINUX_HEADERS_SITE_METHOD = hg
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else ifeq ($(LINUX_HEADERS_CUSTOM_SVN),y)
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LINUX_HEADERS_SITE = $(LINUX_HEADERS_REPO_URL)
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LINUX_HEADERS_SITE_METHOD = svn
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else
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# In X.Y.Z, get X and Y. We replace dots and dashes by spaces in order
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# to use the $(word) function. We support versions such as 4.0, 3.1,
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# 2.6.32, 2.6.32-rc1, 3.0-rc6, etc.
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ifeq ($(findstring x2.6.,x$(LINUX_HEADERS_VERSION)),x2.6.)
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LINUX_HEADERS_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v2.6
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else ifeq ($(findstring x3.,x$(LINUX_HEADERS_VERSION)),x3.)
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LINUX_HEADERS_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v3.x
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else ifeq ($(findstring x4.,x$(LINUX_HEADERS_VERSION)),x4.)
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LINUX_HEADERS_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v4.x
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endif # x2.6
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# release candidates are in testing/ subdir
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ifneq ($(findstring -rc,$(LINUX_HEADERS_VERSION)),)
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LINUX_HEADERS_SITE := $(LINUX_HEADERS_SITE)/testing
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endif # -rc
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endif # LINUX_HEADERS_CUSTOM_TARBALL
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# Apply any necessary patches if we are using the headers from a kernel
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# build.
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ifeq ($(BR2_KERNEL_HEADERS_AS_KERNEL),y)
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LINUX_HEADERS_PATCHES = $(call qstrip,$(BR2_LINUX_KERNEL_PATCH))
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# We rely on the generic package infrastructure to download and apply
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# remote patches (downloaded from ftp, http or https). For local
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# patches, we can't rely on that infrastructure, because there might
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# be directories in the patch list (unlike for other packages).
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LINUX_HEADERS_PATCH = $(filter ftp://% http://% https://%,$(LINUX_HEADERS_PATCHES))
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define LINUX_HEADERS_APPLY_LOCAL_PATCHES
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for p in $(filter-out ftp://% http://% https://%,$(LINUX_HEADERS_PATCHES)) ; do \
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if test -d $$p ; then \
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$(APPLY_PATCHES) $(@D) $$p \*.patch || exit 1 ; \
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else \
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$(APPLY_PATCHES) $(@D) `dirname $$p` `basename $$p` || exit 1; \
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fi \
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done
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endef
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LINUX_HEADERS_POST_PATCH_HOOKS += LINUX_HEADERS_APPLY_LOCAL_PATCHES
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endif # BR2_KERNEL_HEADERS_AS_KERNEL
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# Skip hash checking for custom kernel headers.
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ifeq ($(BR2_KERNEL_HEADERS_VERSION)$(BR2_KERNEL_HEADERS_CUSTOM_TARBALL)$(BR2_KERNEL_HEADERS_CUSTOM_GIT),y)
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BR_NO_CHECK_HASH_FOR += $(LINUX_HEADERS_SOURCE)
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endif
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# linux-headers really is the same as the linux package
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LINUX_HEADERS_DL_SUBDIR = linux
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LINUX_HEADERS_LICENSE = GPL-2.0
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LINUX_HEADERS_LICENSE_FILES = COPYING
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LINUX_HEADERS_INSTALL_STAGING = YES
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# linux-headers is part of the toolchain so disable the toolchain dependency
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LINUX_HEADERS_ADD_TOOLCHAIN_DEPENDENCY = NO
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# For some architectures (eg. Arc, Cris, Hexagon, ia64, parisc,
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# score and xtensa), the Linux buildsystem tries to call the
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# cross-compiler, although it is not needed at all.
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# This results in seemingly errors like:
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# [...]/scripts/gcc-version.sh: line 26: arc-linux-uclibc-gcc: command not found
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# Those can be safely ignored.
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# This step is required to have a separate linux headers location for
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# uClibc building. This way uClibc doesn't modify linux headers on installation
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# of "its" headers
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define LINUX_HEADERS_CONFIGURE_CMDS
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(cd $(@D); \
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$(TARGET_MAKE_ENV) $(MAKE) \
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ARCH=$(KERNEL_ARCH) \
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HOSTCC="$(HOSTCC)" \
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HOSTCFLAGS="$(HOSTCFLAGS)" \
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HOSTCXX="$(HOSTCXX)" \
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INSTALL_HDR_PATH=$(@D)/usr \
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headers_install)
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endef
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define LINUX_HEADERS_INSTALL_STAGING_CMDS
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(cd $(@D); \
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$(TARGET_MAKE_ENV) $(MAKE) \
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ARCH=$(KERNEL_ARCH) \
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HOSTCC="$(HOSTCC)" \
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HOSTCFLAGS="$(HOSTCFLAGS)" \
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HOSTCXX="$(HOSTCXX)" \
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INSTALL_HDR_PATH=$(STAGING_DIR)/usr \
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headers_install)
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endef
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ifeq ($(BR2_KERNEL_HEADERS_VERSION)$(BR2_KERNEL_HEADERS_AS_KERNEL)$(BR2_KERNEL_HEADERS_CUSTOM_TARBALL)$(BR2_KERNEL_HEADERS_CUSTOM_GIT),y)
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define LINUX_HEADERS_CHECK_VERSION
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$(call check_kernel_headers_version,\
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$(STAGING_DIR),\
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$(call qstrip,$(BR2_TOOLCHAIN_HEADERS_AT_LEAST)))
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endef
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LINUX_HEADERS_POST_INSTALL_STAGING_HOOKS += LINUX_HEADERS_CHECK_VERSION
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endif
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$(eval $(generic-package))
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