338e62bd5d
When Buildroot is released, it knows up to a certain kernel header version, and no later. However, it is possible that an external toolchain will be used, that uses headers newer than the latest version Buildroot knows about. This may also happen when testing a development, an rc-class, or a newly released kernel, either in an external toolchain, or with an internal toolchain with custom headers (same-as-kernel, custom version, custom git, custom tarball). In the current state, Buildroot would refuse to use such toolchains, because the test is for strict equality. We'd like to make that situation possible, but we also want the user not to be lenient at the same time, and select the right headers version when it is known. So, we add a new Kconfig blind option that the latest kernel headers version selects. This options is then used to decide whether we do a strict or loose check of the kernel headers. Suggested-by: Aaron Sierra <asierra@xes-inc.com> Signed-off-by: Vincent Fazio <vfazio@xes-inc.com> [yann.morin.1998@free.fr: - only do a loose check for the latest version - expand commit log ] Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr> Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Tested-by: Vincent Fazio <vfazio@xes-inc.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
152 lines
6.0 KiB
Makefile
152 lines
6.0 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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# Compute LINUX_HEADERS_SOURCE and LINUX_HEADERS_SITE from the configuration
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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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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_SOURCE = linux-$(LINUX_HEADERS_VERSION).tar.gz
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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_SOURCE = linux-$(LINUX_HEADERS_VERSION).tar.gz
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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_SOURCE = linux-$(LINUX_HEADERS_VERSION).tar.gz
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LINUX_HEADERS_SITE = $(LINUX_HEADERS_REPO_URL)
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LINUX_HEADERS_SITE_METHOD = svn
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else ifneq ($(findstring -rc,$(LINUX_HEADERS_VERSION)),)
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# Since 4.12-rc1, -rc kernels are generated from cgit. This also works for
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# older -rc kernels.
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LINUX_HEADERS_SOURCE = linux-$(LINUX_HEADERS_VERSION).tar.gz
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LINUX_HEADERS_SITE = https://git.kernel.org/torvalds/t
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else
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LINUX_HEADERS_SOURCE = linux-$(LINUX_HEADERS_VERSION).tar.xz
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ifeq ($(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
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LINUX_HEADERS_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v$(firstword $(subst ., ,$(LINUX_HEADERS_VERSION))).x
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endif # x2.6
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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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$(wildcard $(addsuffix /linux,$(call qstrip,$(BR2_GLOBAL_PATCH_DIR))))
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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 += $(LINUX_HEADERS_SOURCE)
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endif
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# linux-headers really is the same as the linux package
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LINUX_HEADERS_DL_SUBDIR = linux
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LINUX_HEADERS_LICENSE = GPL-2.0
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ifeq ($(BR2_KERNEL_HEADERS_LATEST),y)
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LINUX_HEADERS_LICENSE_FILES = \
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COPYING \
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LICENSES/preferred/GPL-2.0 \
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LICENSES/exceptions/Linux-syscall-note
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endif
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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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# In this case, we must always do a 'loose' test, because they are all
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# custom versions which may be later than what we know right now.
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define LINUX_HEADERS_CHECK_VERSION
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$(call check_kernel_headers_version,\
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$(BUILD_DIR),\
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$(STAGING_DIR),\
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$(call qstrip,$(BR2_TOOLCHAIN_HEADERS_AT_LEAST)),\
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loose)
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endef
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LINUX_HEADERS_POST_INSTALL_STAGING_HOOKS += LINUX_HEADERS_CHECK_VERSION
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endif
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$(eval $(generic-package))
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