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2026.08.x
buildroot/package/linux-headers/linux-headers.mk
Francesco Mancino f87d354fe6 package/linux-headers: pass --no-print-directory 
Since commit 5fc10e76fa2a9 in linux v6.5-rc1, the kernel does a
recursive make call to add the --no-print-directory flag if it is not
set.

Buildroot sets MAKEOVERRIDES empty, which causes none of the
command-line overrides to be propagated to sub-makes. This only goes one
level deep, so it is not a problem. However, if the user sets
MAKEOVERRIDES in their environment, the environment _does_ get
propagated down to sub-makes. Therefore, the recursive call from within
the kernel will not get any of the command-line overrides we give it.
As a result, INSTALL_HDR_PATH will not get passed down to the kernel's
sub-make, thereby breaking the installation to staging.

Note that if Buildroot itself does a sub-make call (e.g. because O= is
set, or umask is different), --no-print-directory is already added so
the issue doesn't occur.

Set --no-print-directory explicitly, which avoids the kernel's sub-make
call, which preserves INSTALL_HDR_PATH. It is only really needed for the
staging install, since the local install in _CONFIGURE_CMDS just sets it
to the default value. For consistency though, set it there as well.

Setting --no-print-directory when it is not needed doesn't hurt.

Signed-off-by: Francesco Mancino <francesco.mancino@tutus.se>
Signed-off-by: Arnout Vandecappelle <arnout@rnout.be>
(cherry picked from commit 77faecb13a)
Signed-off-by: Raphaël Mélotte <raphael.melotte@mind.be>
2026-10-15 14:11:26 +02:00

173 lines
7.1 KiB
Makefile
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################################################################################
#
# linux-headers
#
################################################################################
# This package is used to provide Linux kernel headers for the
# internal toolchain backend.
# Set variables depending on whether we are using headers from a kernel
# build or a standalone header package.
ifeq ($(BR2_KERNEL_HEADERS_AS_KERNEL),y)
LINUX_HEADERS_CUSTOM_TARBALL = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_TARBALL))
LINUX_HEADERS_CUSTOM_GIT = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_GIT))
LINUX_HEADERS_CUSTOM_HG = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_HG))
LINUX_HEADERS_CUSTOM_SVN = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_SVN))
LINUX_HEADERS_VERSION = $(call qstrip,$(BR2_LINUX_KERNEL_VERSION))
LINUX_HEADERS_CUSTOM_TARBALL_LOCATION = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION))
LINUX_HEADERS_REPO_URL = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
LINUX_HEADERS_CIP = $(BR2_LINUX_KERNEL_LATEST_CIP_VERSION)$(BR2_LINUX_KERNEL_LATEST_CIP_RT_VERSION)
ifneq ($(LINUX_HEADERS_OVERRIDE_SRCDIR),)
$(error LINUX_HEADERS_OVERRIDE_SRCDIR must not be set when BR2_KERNEL_HEADERS_AS_KERNEL=y)
endif
LINUX_HEADERS_OVERRIDE_SRCDIR = $(LINUX_OVERRIDE_SRCDIR)
else # ! BR2_KERNEL_HEADERS_AS_KERNEL
LINUX_HEADERS_CUSTOM_TARBALL = $(call qstrip,$(BR2_KERNEL_HEADERS_CUSTOM_TARBALL))
LINUX_HEADERS_CUSTOM_GIT = $(call qstrip,$(BR2_KERNEL_HEADERS_CUSTOM_GIT))
LINUX_HEADERS_CUSTOM_HG =
LINUX_HEADERS_CUSTOM_SVN =
LINUX_HEADERS_VERSION = $(call qstrip,$(BR2_DEFAULT_KERNEL_HEADERS))
LINUX_HEADERS_CUSTOM_TARBALL_LOCATION = $(call qstrip,$(BR2_KERNEL_HEADERS_CUSTOM_TARBALL_LOCATION))
LINUX_HEADERS_REPO_URL = $(call qstrip,$(BR2_KERNEL_HEADERS_CUSTOM_REPO_URL))
LINUX_HEADERS_CIP =
endif # BR2_KERNEL_HEADERS_AS_KERNEL
ifeq ($(BR2_KERNEL_HEADERS_VERSION)$(BR_BUILDING),yy)
ifeq ($(LINUX_HEADERS_VERSION),)
$(error No kernel headers version set, check your BR2_DEFAULT_KERNEL_VERSION setting)
endif
endif
# Compute LINUX_HEADERS_SOURCE and LINUX_HEADERS_SITE from the configuration
ifeq ($(LINUX_HEADERS_CUSTOM_TARBALL),y)
ifeq ($(BR_BUILDING),y)
ifeq ($(LINUX_HEADERS_CUSTOM_TARBALL_LOCATION),)
$(error No kernel headers tarball location set, check your BR2_KERNEL_HEADERS_CUSTOM_TARBALL_LOCATION setting)
endif
endif
LINUX_HEADERS_SOURCE = $(notdir $(LINUX_HEADERS_CUSTOM_TARBALL_LOCATION))
LINUX_HEADERS_SITE = $(patsubst %/,%,$(dir $(LINUX_HEADERS_CUSTOM_TARBALL_LOCATION)))
else ifeq ($(LINUX_HEADERS_CUSTOM_GIT),y)
LINUX_HEADERS_SOURCE = linux-$(LINUX_HEADERS_VERSION)$(BR_FMT_VERSION_git).tar.gz
LINUX_HEADERS_SITE = $(LINUX_HEADERS_REPO_URL)
LINUX_HEADERS_SITE_METHOD = git
else ifeq ($(LINUX_HEADERS_CUSTOM_HG),y)
LINUX_HEADERS_SOURCE = linux-$(LINUX_HEADERS_VERSION).tar.gz
LINUX_HEADERS_SITE = $(LINUX_HEADERS_REPO_URL)
LINUX_HEADERS_SITE_METHOD = hg
else ifeq ($(LINUX_HEADERS_CUSTOM_SVN),y)
LINUX_HEADERS_SOURCE = linux-$(LINUX_HEADERS_VERSION)$(BR_FMT_VERSION_svn).tar.gz
LINUX_HEADERS_SITE = $(LINUX_HEADERS_REPO_URL)
LINUX_HEADERS_SITE_METHOD = svn
else ifeq ($(LINUX_HEADERS_CIP),y)
LINUX_HEADERS_SOURCE = linux-cip-$(LINUX_HEADERS_VERSION).tar.gz
LINUX_HEADERS_SITE = https://git.kernel.org/pub/scm/linux/kernel/git/cip/linux-cip.git/snapshot
else ifneq ($(findstring -rc,$(LINUX_HEADERS_VERSION)),)
# Since 4.12-rc1, -rc kernels are generated from cgit. This also works for
# older -rc kernels.
LINUX_HEADERS_SOURCE = linux-$(LINUX_HEADERS_VERSION).tar.gz
LINUX_HEADERS_SITE = https://git.kernel.org/torvalds/t
else
LINUX_HEADERS_SOURCE = linux-$(LINUX_HEADERS_VERSION).tar.xz
ifeq ($(findstring x2.6.,x$(LINUX_HEADERS_VERSION)),x2.6.)
LINUX_HEADERS_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v2.6
else
LINUX_HEADERS_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v$(firstword $(subst ., ,$(LINUX_HEADERS_VERSION))).x
endif # x2.6
endif # LINUX_HEADERS_CUSTOM_TARBALL
# Apply any necessary patches if we are using the headers from a kernel
# build.
ifeq ($(BR2_KERNEL_HEADERS_AS_KERNEL),y)
LINUX_HEADERS_PATCHES = $(call qstrip,$(BR2_LINUX_KERNEL_PATCH)) \
$(wildcard $(addsuffix /linux,$(call qstrip,$(BR2_GLOBAL_PATCH_DIR))))
# We rely on the generic package infrastructure to download and apply
# remote patches (downloaded from ftp, http or https). For local
# patches, we can't rely on that infrastructure, because there might
# be directories in the patch list (unlike for other packages).
LINUX_HEADERS_PATCH = $(filter ftp://% http://% https://%,$(LINUX_HEADERS_PATCHES))
define LINUX_HEADERS_APPLY_LOCAL_PATCHES
for p in $(filter-out ftp://% http://% https://%,$(LINUX_HEADERS_PATCHES)) ; do \
if test -d $$p ; then \
$(APPLY_PATCHES) $(@D) $$p \*.patch || exit 1 ; \
else \
$(APPLY_PATCHES) $(@D) `dirname $$p` `basename $$p` || exit 1; \
fi \
done
endef
LINUX_HEADERS_POST_PATCH_HOOKS += LINUX_HEADERS_APPLY_LOCAL_PATCHES
endif # BR2_KERNEL_HEADERS_AS_KERNEL
# Skip hash checking for custom kernel headers.
ifeq ($(BR2_KERNEL_HEADERS_VERSION)$(BR2_KERNEL_HEADERS_CUSTOM_TARBALL)$(BR2_KERNEL_HEADERS_CUSTOM_GIT),y)
BR_NO_CHECK_HASH_FOR += $(LINUX_HEADERS_SOURCE)
endif
# linux-headers really is the same as the linux package
LINUX_HEADERS_DL_SUBDIR = linux
LINUX_HEADERS_LICENSE = GPL-2.0
LINUX_HEADERS_LICENSE_FILES = $(call qstrip,$(BR2_PACKAGE_HOST_LINUX_HEADERS_LICENSE_FILES))
LINUX_HEADERS_CPE_ID_VENDOR = linux
LINUX_HEADERS_CPE_ID_PRODUCT = linux_kernel
LINUX_HEADERS_INSTALL_STAGING = YES
# linux-headers is part of the toolchain so disable the toolchain dependency
LINUX_HEADERS_ADD_TOOLCHAIN_DEPENDENCY = NO
LINUX_HEADERS_DEPENDENCIES = $(BR2_MAKE_HOST_DEPENDENCY)
# For some architectures (eg. Arc, Cris, Hexagon, ia64, parisc,
# score and xtensa), the Linux buildsystem tries to call the
# cross-compiler, although it is not needed at all.
# This results in seemingly errors like:
# [...]/scripts/gcc-version.sh: line 26: arc-linux-uclibc-gcc: command not found
# Those can be safely ignored.
# This step is required to have a separate linux headers location for
# uClibc building. This way uClibc doesn't modify linux headers on installation
# of "its" headers
define LINUX_HEADERS_CONFIGURE_CMDS
(cd $(@D); \
$(TARGET_MAKE_ENV) $(BR2_MAKE) \
--no-print-directory \
ARCH=$(KERNEL_ARCH) \
HOSTCC="$(HOSTCC)" \
HOSTCFLAGS="$(HOSTCFLAGS)" \
HOSTCXX="$(HOSTCXX)" \
INSTALL_HDR_PATH=$(@D)/usr \
headers_install)
endef
define LINUX_HEADERS_INSTALL_STAGING_CMDS
(cd $(@D); \
$(TARGET_MAKE_ENV) $(BR2_MAKE) \
--no-print-directory \
ARCH=$(KERNEL_ARCH) \
HOSTCC="$(HOSTCC)" \
HOSTCFLAGS="$(HOSTCFLAGS)" \
HOSTCXX="$(HOSTCXX)" \
INSTALL_HDR_PATH=$(STAGING_DIR)/usr \
headers_install)
endef
ifeq ($(BR2_KERNEL_HEADERS_VERSION)$(BR2_KERNEL_HEADERS_AS_KERNEL)$(BR2_KERNEL_HEADERS_CUSTOM_TARBALL)$(BR2_KERNEL_HEADERS_CUSTOM_GIT),y)
# In this case, we must always do a 'loose' test, because they are all
# custom versions which may be later than what we know right now.
define LINUX_HEADERS_CHECK_VERSION
$(call check_kernel_headers_version,\
$(BUILD_DIR),\
$(STAGING_DIR),\
$(call qstrip,$(BR2_TOOLCHAIN_HEADERS_AT_LEAST)),\
loose)
endef
LINUX_HEADERS_POST_INSTALL_STAGING_HOOKS += LINUX_HEADERS_CHECK_VERSION
endif
$(eval $(generic-package))
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