8c4b55053e
Explain why the kernel needs firmware packages as build time dependencies. Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
618 lines
24 KiB
Makefile
618 lines
24 KiB
Makefile
################################################################################
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#
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# Linux kernel target
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#
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################################################################################
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LINUX_VERSION = $(call qstrip,$(BR2_LINUX_KERNEL_VERSION))
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LINUX_LICENSE = GPL-2.0
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ifeq ($(BR2_LINUX_KERNEL_LATEST_VERSION),y)
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LINUX_LICENSE_FILES = \
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COPYING \
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LICENSES/preferred/GPL-2.0 \
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LICENSES/exceptions/Linux-syscall-note
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endif
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LINUX_CPE_ID_VENDOR = linux
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LINUX_CPE_ID_PRODUCT = linux_kernel
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LINUX_CPE_ID_PREFIX = cpe:2.3:o
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# Compute LINUX_SOURCE and LINUX_SITE from the configuration
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ifeq ($(BR2_LINUX_KERNEL_CUSTOM_TARBALL),y)
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LINUX_TARBALL = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION))
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LINUX_SITE = $(patsubst %/,%,$(dir $(LINUX_TARBALL)))
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LINUX_SOURCE = $(notdir $(LINUX_TARBALL))
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else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_GIT),y)
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LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
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LINUX_SITE_METHOD = git
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else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_HG),y)
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LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
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LINUX_SITE_METHOD = hg
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else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_SVN),y)
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LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
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LINUX_SITE_METHOD = svn
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else ifeq ($(BR2_LINUX_KERNEL_LATEST_CIP_VERSION)$(BR2_LINUX_KERNEL_LATEST_CIP_RT_VERSION),y)
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LINUX_SOURCE = linux-cip-$(LINUX_VERSION).tar.gz
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LINUX_SITE = https://git.kernel.org/pub/scm/linux/kernel/git/cip/linux-cip.git/snapshot
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else ifneq ($(findstring -rc,$(LINUX_VERSION)),)
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# Since 4.12-rc1, -rc kernels are generated from cgit. This also works for
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# older -rc kernels.
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LINUX_SITE = https://git.kernel.org/torvalds/t
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else
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LINUX_SOURCE = linux-$(LINUX_VERSION).tar.xz
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ifeq ($(findstring x2.6.,x$(LINUX_VERSION)),x2.6.)
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LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v2.6
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else
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LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v$(firstword $(subst ., ,$(LINUX_VERSION))).x
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endif
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endif
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ifeq ($(BR2_LINUX_KERNEL)$(BR2_LINUX_KERNEL_LATEST_VERSION),y)
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BR_NO_CHECK_HASH_FOR += $(LINUX_SOURCE)
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endif
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LINUX_PATCHES = $(call qstrip,$(BR2_LINUX_KERNEL_PATCH))
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# We have no way to know the hashes for user-supplied patches.
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BR_NO_CHECK_HASH_FOR += $(notdir $(LINUX_PATCHES))
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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_PATCH = $(filter ftp://% http://% https://%,$(LINUX_PATCHES))
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# while the kernel is built for the target, the build may need various
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# host libraries depending on config (and version), so use
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# HOST_MAKE_ENV here. In particular, this ensures that our
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# host-pkgconf will look for host libraries and not target ones.
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LINUX_MAKE_ENV = \
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$(HOST_MAKE_ENV) \
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BR_BINARIES_DIR=$(BINARIES_DIR)
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LINUX_INSTALL_IMAGES = YES
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LINUX_DEPENDENCIES = host-kmod
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# The kernel CONFIG_EXTRA_FIRMWARE feature requires firmware files at build
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# time. Make sure they are available before the kernel builds.
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LINUX_DEPENDENCIES += \
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$(if $(BR2_PACKAGE_INTEL_MICROCODE),intel-microcode) \
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$(if $(BR2_PACKAGE_LINUX_FIRMWARE),linux-firmware) \
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$(if $(BR2_PACKAGE_WIRELESS_REGDB),wireless-regdb)
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# Starting with 4.16, the generated kconfig paser code is no longer
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# shipped with the kernel sources, so we need flex and bison, but
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# only if the host does not have them.
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LINUX_KCONFIG_DEPENDENCIES = \
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$(BR2_BISON_HOST_DEPENDENCY) \
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$(BR2_FLEX_HOST_DEPENDENCY)
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# Starting with 4.18, the kconfig in the kernel calls the
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# cross-compiler to check its capabilities. So we need the
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# toolchain before we can call the configurators.
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LINUX_KCONFIG_DEPENDENCIES += toolchain
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# host tools needed for kernel compression
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ifeq ($(BR2_LINUX_KERNEL_LZ4),y)
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LINUX_DEPENDENCIES += host-lz4
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else ifeq ($(BR2_LINUX_KERNEL_LZMA),y)
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LINUX_DEPENDENCIES += host-lzma
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else ifeq ($(BR2_LINUX_KERNEL_LZO),y)
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LINUX_DEPENDENCIES += host-lzop
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else ifeq ($(BR2_LINUX_KERNEL_XZ),y)
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LINUX_DEPENDENCIES += host-xz
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else ifeq ($(BR2_LINUX_KERNEL_ZSTD),y)
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LINUX_DEPENDENCIES += host-zstd
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endif
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LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_GZIP) += CONFIG_KERNEL_GZIP
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LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZ4) += CONFIG_KERNEL_LZ4
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LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZMA) += CONFIG_KERNEL_LZMA
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LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZO) += CONFIG_KERNEL_LZO
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LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_XZ) += CONFIG_KERNEL_XZ
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LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_ZSTD) += CONFIG_KERNEL_ZSTD
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LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_UNCOMPRESSED) += CONFIG_KERNEL_UNCOMPRESSED
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ifeq ($(BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL),y)
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LINUX_DEPENDENCIES += host-openssl
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endif
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ifeq ($(BR2_LINUX_KERNEL_NEEDS_HOST_LIBELF),y)
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LINUX_DEPENDENCIES += host-elfutils host-pkgconf
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endif
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ifeq ($(BR2_LINUX_KERNEL_NEEDS_HOST_PAHOLE),y)
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LINUX_DEPENDENCIES += host-pahole
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else
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define LINUX_FIXUP_CONFIG_PAHOLE_CHECK
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if grep -q "^CONFIG_DEBUG_INFO_BTF=y" $(KCONFIG_DOT_CONFIG); then \
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echo "To use CONFIG_DEBUG_INFO_BTF, enable host-pahole (BR2_LINUX_KERNEL_NEEDS_HOST_PAHOLE)" 1>&2; \
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exit 1; \
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fi
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endef
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endif
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# If host-uboot-tools is selected by the user, assume it is needed to
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# create a custom image
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ifeq ($(BR2_PACKAGE_HOST_UBOOT_TOOLS),y)
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LINUX_DEPENDENCIES += host-uboot-tools
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endif
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ifneq ($(ARCH_XTENSA_OVERLAY_FILE),)
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define LINUX_XTENSA_OVERLAY_EXTRACT
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$(call arch-xtensa-overlay-extract,$(@D),linux)
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endef
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LINUX_POST_EXTRACT_HOOKS += LINUX_XTENSA_OVERLAY_EXTRACT
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LINUX_EXTRA_DOWNLOADS += $(ARCH_XTENSA_OVERLAY_URL)
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endif
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# We don't want to run depmod after installing the kernel. It's done in a
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# target-finalize hook, to encompass modules installed by packages.
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LINUX_MAKE_FLAGS = \
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HOSTCC="$(HOSTCC) $(HOST_CFLAGS) $(HOST_LDFLAGS)" \
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ARCH=$(KERNEL_ARCH) \
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INSTALL_MOD_PATH=$(TARGET_DIR) \
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CROSS_COMPILE="$(TARGET_CROSS)" \
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DEPMOD=$(HOST_DIR)/sbin/depmod
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ifeq ($(BR2_REPRODUCIBLE),y)
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LINUX_MAKE_ENV += \
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KBUILD_BUILD_VERSION=1 \
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KBUILD_BUILD_USER=buildroot \
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KBUILD_BUILD_HOST=buildroot \
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KBUILD_BUILD_TIMESTAMP="$(shell LC_ALL=C date -d @$(SOURCE_DATE_EPOCH))"
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endif
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# gcc-8 started warning about function aliases that have a
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# non-matching prototype. This seems rather useful in general, but it
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# causes tons of warnings in the Linux kernel, where we rely on
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# abusing those aliases for system call entry points, in order to
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# sanitize the arguments passed from user space in registers.
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# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82435
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ifeq ($(BR2_TOOLCHAIN_GCC_AT_LEAST_8),y)
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LINUX_MAKE_ENV += KCFLAGS=-Wno-attribute-alias
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endif
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ifeq ($(BR2_LINUX_KERNEL_DTB_OVERLAY_SUPPORT),y)
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LINUX_MAKE_ENV += DTC_FLAGS=-@
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endif
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# Get the real Linux version, which tells us where kernel modules are
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# going to be installed in the target filesystem.
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# Filter out 'w' from MAKEFLAGS, to workaround a bug in make 4.1 (#13141)
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LINUX_VERSION_PROBED = `MAKEFLAGS='$(filter-out w,$(MAKEFLAGS))' $(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) --no-print-directory -s kernelrelease 2>/dev/null`
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LINUX_DTS_NAME += $(call qstrip,$(BR2_LINUX_KERNEL_INTREE_DTS_NAME))
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# We keep only the .dts files, so that the user can specify both .dts
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# and .dtsi files in BR2_LINUX_KERNEL_CUSTOM_DTS_PATH. Both will be
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# copied to arch/<arch>/boot/dts, but only the .dts files will
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# actually be generated as .dtb.
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LINUX_DTS_NAME += $(basename $(filter %.dts,$(notdir $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH)))))
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LINUX_DTBS = $(addsuffix .dtb,$(LINUX_DTS_NAME))
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ifeq ($(BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM),y)
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LINUX_IMAGE_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_IMAGE_NAME))
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LINUX_TARGET_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_IMAGE_TARGET_NAME))
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ifeq ($(LINUX_IMAGE_NAME),)
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LINUX_IMAGE_NAME = $(LINUX_TARGET_NAME)
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endif
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else
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ifeq ($(BR2_LINUX_KERNEL_UIMAGE),y)
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LINUX_IMAGE_NAME = uImage
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else ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y)
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LINUX_IMAGE_NAME = uImage
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else ifeq ($(BR2_LINUX_KERNEL_BZIMAGE),y)
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LINUX_IMAGE_NAME = bzImage
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else ifeq ($(BR2_LINUX_KERNEL_ZIMAGE),y)
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LINUX_IMAGE_NAME = zImage
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else ifeq ($(BR2_LINUX_KERNEL_ZIMAGE_EPAPR),y)
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LINUX_IMAGE_NAME = zImage.epapr
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else ifeq ($(BR2_LINUX_KERNEL_APPENDED_ZIMAGE),y)
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LINUX_IMAGE_NAME = zImage
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else ifeq ($(BR2_LINUX_KERNEL_CUIMAGE),y)
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LINUX_IMAGE_NAME = cuImage.$(firstword $(LINUX_DTS_NAME))
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else ifeq ($(BR2_LINUX_KERNEL_SIMPLEIMAGE),y)
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LINUX_IMAGE_NAME = simpleImage.$(firstword $(LINUX_DTS_NAME))
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else ifeq ($(BR2_LINUX_KERNEL_IMAGE),y)
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LINUX_IMAGE_NAME = Image
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else ifeq ($(BR2_LINUX_KERNEL_IMAGEGZ),y)
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LINUX_IMAGE_NAME = Image.gz
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else ifeq ($(BR2_LINUX_KERNEL_LINUX_BIN),y)
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LINUX_IMAGE_NAME = linux.bin
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else ifeq ($(BR2_LINUX_KERNEL_VMLINUX_BIN),y)
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LINUX_IMAGE_NAME = vmlinux.bin
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else ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
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LINUX_IMAGE_NAME = vmlinux
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else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ),y)
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LINUX_IMAGE_NAME = vmlinuz
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else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ_BIN),y)
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LINUX_IMAGE_NAME = vmlinuz.bin
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endif
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# The if-else blocks above are all the image types we know of, and all
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# come from a Kconfig choice, so we know we have LINUX_IMAGE_NAME set
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# to something
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LINUX_TARGET_NAME = $(LINUX_IMAGE_NAME)
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endif
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LINUX_KERNEL_UIMAGE_LOADADDR = $(call qstrip,$(BR2_LINUX_KERNEL_UIMAGE_LOADADDR))
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ifneq ($(LINUX_KERNEL_UIMAGE_LOADADDR),)
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LINUX_MAKE_FLAGS += LOADADDR="$(LINUX_KERNEL_UIMAGE_LOADADDR)"
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endif
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# Compute the arch path, since i386 and x86_64 are in arch/x86 and not
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# in arch/$(KERNEL_ARCH). Even if the kernel creates symbolic links
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# for bzImage, arch/i386 and arch/x86_64 do not exist when copying the
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# defconfig file.
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ifeq ($(KERNEL_ARCH),i386)
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LINUX_ARCH_PATH = $(LINUX_DIR)/arch/x86
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else ifeq ($(KERNEL_ARCH),x86_64)
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LINUX_ARCH_PATH = $(LINUX_DIR)/arch/x86
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else ifeq ($(KERNEL_ARCH),sparc64)
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LINUX_ARCH_PATH = $(LINUX_DIR)/arch/sparc
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else
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LINUX_ARCH_PATH = $(LINUX_DIR)/arch/$(KERNEL_ARCH)
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endif
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ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
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LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
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else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ),y)
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LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
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else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ_BIN),y)
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LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
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else
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LINUX_IMAGE_PATH = $(LINUX_ARCH_PATH)/boot/$(LINUX_IMAGE_NAME)
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endif # BR2_LINUX_KERNEL_VMLINUX
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define LINUX_APPLY_LOCAL_PATCHES
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for p in $(filter-out ftp://% http://% https://%,$(LINUX_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_POST_PATCH_HOOKS += LINUX_APPLY_LOCAL_PATCHES
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# Older versions break on gcc 10+ because of redefined symbols
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define LINUX_DROP_YYLLOC
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$(Q)grep -Z -l -r -E '^YYLTYPE yylloc;$$' $(@D) \
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|xargs -0 -r $(SED) '/^YYLTYPE yylloc;$$/d'
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endef
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LINUX_POST_PATCH_HOOKS += LINUX_DROP_YYLLOC
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# Older linux kernels use deprecated perl constructs in timeconst.pl
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# that were removed for perl 5.22+ so it breaks on newer distributions
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# Try a dry-run patch to see if this applies, if it does go ahead
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define LINUX_TRY_PATCH_TIMECONST
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@if patch -p1 --dry-run -f -s -d $(@D) <$(LINUX_PKGDIR)/0001-timeconst.pl-Eliminate-Perl-warning.patch.conditional >/dev/null ; then \
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$(APPLY_PATCHES) $(@D) $(LINUX_PKGDIR) 0001-timeconst.pl-Eliminate-Perl-warning.patch.conditional ; \
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fi
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endef
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LINUX_POST_PATCH_HOOKS += LINUX_TRY_PATCH_TIMECONST
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LINUX_KERNEL_CUSTOM_LOGO_PATH = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_LOGO_PATH))
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ifneq ($(LINUX_KERNEL_CUSTOM_LOGO_PATH),)
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LINUX_DEPENDENCIES += host-imagemagick
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define LINUX_KERNEL_CUSTOM_LOGO_CONVERT
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$(HOST_DIR)/bin/convert $(LINUX_KERNEL_CUSTOM_LOGO_PATH) \
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-dither None -colors 224 -compress none \
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$(LINUX_DIR)/drivers/video/logo/logo_linux_clut224.ppm
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endef
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LINUX_PRE_BUILD_HOOKS += LINUX_KERNEL_CUSTOM_LOGO_CONVERT
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endif
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ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
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LINUX_KCONFIG_DEFCONFIG = $(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG))_defconfig
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else ifeq ($(BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG),y)
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LINUX_KCONFIG_DEFCONFIG = defconfig
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else ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
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LINUX_KCONFIG_FILE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE))
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endif
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LINUX_KCONFIG_FRAGMENT_FILES = $(call qstrip,$(BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES))
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LINUX_KCONFIG_EDITORS = menuconfig xconfig gconfig nconfig
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# LINUX_MAKE_FLAGS overrides HOSTCC to allow the kernel build to find
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# our host-openssl and host-libelf. However, this triggers a bug in
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# the kconfig build script that causes it to build with
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# /usr/include/ncurses.h (which is typically wchar) but link with
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# $(HOST_DIR)/lib/libncurses.so (which is not). We don't actually
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# need any host-package for kconfig, so remove the HOSTCC override
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# again. In addition, even though linux depends on the toolchain and
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# therefore host-ccache would be ready, we use HOSTCC_NOCCACHE for
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# consistency with other kconfig packages.
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LINUX_KCONFIG_OPTS = $(LINUX_MAKE_FLAGS) HOSTCC="$(HOSTCC_NOCCACHE)"
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# If no package has yet set it, set it from the Kconfig option
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LINUX_NEEDS_MODULES ?= $(BR2_LINUX_NEEDS_MODULES)
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# Make sure the Linux kernel is built with the right endianness. Not
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# all architectures support
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# CONFIG_CPU_BIG_ENDIAN/CONFIG_CPU_LITTLE_ENDIAN in Linux, but the
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# option will be thrown away and ignored if it doesn't exist.
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ifeq ($(BR2_ENDIAN),"BIG")
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define LINUX_FIXUP_CONFIG_ENDIANNESS
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$(call KCONFIG_ENABLE_OPT,CONFIG_CPU_BIG_ENDIAN)
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endef
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else
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define LINUX_FIXUP_CONFIG_ENDIANNESS
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$(call KCONFIG_ENABLE_OPT,CONFIG_CPU_LITTLE_ENDIAN)
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endef
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endif
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define LINUX_KCONFIG_FIXUP_CMDS
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$(if $(LINUX_NEEDS_MODULES),
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$(call KCONFIG_ENABLE_OPT,CONFIG_MODULES))
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$(call KCONFIG_ENABLE_OPT,$(strip $(LINUX_COMPRESSION_OPT_y)))
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$(foreach opt, $(LINUX_COMPRESSION_OPT_),
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$(call KCONFIG_DISABLE_OPT,$(opt))
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)
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$(LINUX_FIXUP_CONFIG_ENDIANNESS)
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$(LINUX_FIXUP_CONFIG_PAHOLE_CHECK)
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$(if $(BR2_arm)$(BR2_armeb),
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$(call KCONFIG_ENABLE_OPT,CONFIG_AEABI))
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$(if $(BR2_powerpc)$(BR2_powerpc64)$(BR2_powerpc64le),
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$(call KCONFIG_ENABLE_OPT,CONFIG_PPC_DISABLE_WERROR))
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$(if $(BR2_ARC_PAGE_SIZE_4K),
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$(call KCONFIG_ENABLE_OPT,CONFIG_ARC_PAGE_SIZE_4K)
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$(call KCONFIG_DISABLE_OPT,CONFIG_ARC_PAGE_SIZE_8K)
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$(call KCONFIG_DISABLE_OPT,CONFIG_ARC_PAGE_SIZE_16K))
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$(if $(BR2_ARC_PAGE_SIZE_8K),
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$(call KCONFIG_DISABLE_OPT,CONFIG_ARC_PAGE_SIZE_4K)
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$(call KCONFIG_ENABLE_OPT,CONFIG_ARC_PAGE_SIZE_8K)
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$(call KCONFIG_DISABLE_OPT,CONFIG_ARC_PAGE_SIZE_16K))
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$(if $(BR2_ARC_PAGE_SIZE_16K),
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$(call KCONFIG_DISABLE_OPT,CONFIG_ARC_PAGE_SIZE_4K)
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$(call KCONFIG_DISABLE_OPT,CONFIG_ARC_PAGE_SIZE_8K)
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$(call KCONFIG_ENABLE_OPT,CONFIG_ARC_PAGE_SIZE_16K))
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$(if $(BR2_TARGET_ROOTFS_CPIO),
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_BLK_DEV_INITRD))
|
|
# As the kernel gets compiled before root filesystems are
|
|
# built, we create a fake cpio file. It'll be
|
|
# replaced later by the real cpio archive, and the kernel will be
|
|
# rebuilt using the linux-rebuild-with-initramfs target.
|
|
$(if $(BR2_TARGET_ROOTFS_INITRAMFS),
|
|
mkdir -p $(BINARIES_DIR)
|
|
touch $(BINARIES_DIR)/rootfs.cpio
|
|
$(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_SOURCE,"$${BR_BINARIES_DIR}/rootfs.cpio")
|
|
$(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_UID,0)
|
|
$(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_GID,0))
|
|
$(if $(BR2_ROOTFS_DEVICE_CREATION_STATIC),,
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS)
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS_MOUNT))
|
|
$(if $(BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV),
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_INOTIFY_USER))
|
|
$(if $(BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV),
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_NET))
|
|
$(if $(BR2_LINUX_KERNEL_APPENDED_DTB),
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_ARM_APPENDED_DTB))
|
|
$(if $(LINUX_KERNEL_CUSTOM_LOGO_PATH),
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_FB)
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_LOGO)
|
|
$(call KCONFIG_ENABLE_OPT,CONFIG_LOGO_LINUX_CLUT224))
|
|
$(call KCONFIG_DISABLE_OPT,CONFIG_GCC_PLUGINS)
|
|
$(PACKAGES_LINUX_CONFIG_FIXUPS)
|
|
endef
|
|
|
|
ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT),y)
|
|
# Starting with 4.17, the generated dtc parser code is no longer
|
|
# shipped with the kernel sources, so we need flex and bison. For
|
|
# reproducibility, we use our owns rather than the host ones.
|
|
LINUX_DEPENDENCIES += host-bison host-flex
|
|
|
|
ifeq ($(BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT),)
|
|
define LINUX_BUILD_DTB
|
|
$(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_DTBS)
|
|
endef
|
|
ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),)
|
|
define LINUX_INSTALL_DTB
|
|
# dtbs moved from arch/<ARCH>/boot to arch/<ARCH>/boot/dts since 3.8-rc1
|
|
$(foreach dtb,$(LINUX_DTBS), \
|
|
install -D \
|
|
$(or $(wildcard $(LINUX_ARCH_PATH)/boot/dts/$(dtb)),$(LINUX_ARCH_PATH)/boot/$(dtb)) \
|
|
$(1)/$(if $(BR2_LINUX_KERNEL_DTB_KEEP_DIRNAME),$(dtb),$(notdir $(dtb)))
|
|
)
|
|
endef
|
|
endif # BR2_LINUX_KERNEL_APPENDED_DTB
|
|
endif # BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT
|
|
endif # BR2_LINUX_KERNEL_DTS_SUPPORT
|
|
|
|
ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y)
|
|
# dtbs moved from arch/$ARCH/boot to arch/$ARCH/boot/dts since 3.8-rc1
|
|
define LINUX_APPEND_DTB
|
|
(cd $(LINUX_ARCH_PATH)/boot; \
|
|
for dtb in $(LINUX_DTS_NAME); do \
|
|
if test -e $${dtb}.dtb ; then \
|
|
dtbpath=$${dtb}.dtb ; \
|
|
else \
|
|
dtbpath=dts/$${dtb}.dtb ; \
|
|
fi ; \
|
|
cat zImage $${dtbpath} > zImage.$${dtb} || exit 1; \
|
|
done)
|
|
endef
|
|
ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y)
|
|
# We need to generate a new u-boot image that takes into
|
|
# account the extra-size added by the device tree at the end
|
|
# of the image. To do so, we first need to retrieve both load
|
|
# address and entry point for the kernel from the already
|
|
# generate uboot image before using mkimage -l.
|
|
LINUX_APPEND_DTB += ; \
|
|
MKIMAGE_ARGS=`$(MKIMAGE) -l $(LINUX_IMAGE_PATH) |\
|
|
sed -n -e 's/Image Name:[ ]*\(.*\)/-n \1/p' -e 's/Load Address:/-a/p' -e 's/Entry Point:/-e/p'`; \
|
|
for dtb in $(LINUX_DTS_NAME); do \
|
|
$(MKIMAGE) -A $(MKIMAGE_ARCH) -O linux \
|
|
-T kernel -C none $${MKIMAGE_ARGS} \
|
|
-d $(LINUX_ARCH_PATH)/boot/zImage.$${dtb} $(LINUX_IMAGE_PATH).$${dtb}; \
|
|
done
|
|
endif
|
|
endif
|
|
|
|
# Compilation. We make sure the kernel gets rebuilt when the
|
|
# configuration has changed. We call the 'all' and
|
|
# '$(LINUX_TARGET_NAME)' targets separately because calling them in
|
|
# the same $(MAKE) invocation has shown to cause parallel build
|
|
# issues.
|
|
# The call to disable gcc-plugins is a stop-gap measure:
|
|
# http://lists.busybox.net/pipermail/buildroot/2020-May/282727.html
|
|
define LINUX_BUILD_CMDS
|
|
$(call KCONFIG_DISABLE_OPT,CONFIG_GCC_PLUGINS)
|
|
$(foreach dts,$(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH)), \
|
|
cp -f $(dts) $(LINUX_ARCH_PATH)/boot/dts/
|
|
)
|
|
$(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) all
|
|
$(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_TARGET_NAME)
|
|
$(LINUX_BUILD_DTB)
|
|
$(LINUX_APPEND_DTB)
|
|
endef
|
|
|
|
ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y)
|
|
# When a DTB was appended, install the potential several images with
|
|
# appended DTBs.
|
|
define LINUX_INSTALL_IMAGE
|
|
mkdir -p $(1)
|
|
cp $(LINUX_ARCH_PATH)/boot/$(LINUX_IMAGE_NAME).* $(1)
|
|
endef
|
|
else
|
|
# Otherwise, just install the unique image generated by the kernel
|
|
# build process.
|
|
define LINUX_INSTALL_IMAGE
|
|
$(INSTALL) -m 0644 -D $(LINUX_IMAGE_PATH) $(1)/$(notdir $(LINUX_IMAGE_NAME))
|
|
endef
|
|
endif
|
|
|
|
ifeq ($(BR2_LINUX_KERNEL_INSTALL_TARGET),y)
|
|
define LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET
|
|
$(call LINUX_INSTALL_IMAGE,$(TARGET_DIR)/boot)
|
|
$(call LINUX_INSTALL_DTB,$(TARGET_DIR)/boot)
|
|
endef
|
|
endif
|
|
|
|
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)/bin/linux-dtc ; \
|
|
$(if $(BR2_PACKAGE_HOST_DTC),,ln -sf linux-dtc $(HOST_DIR)/bin/dtc;) \
|
|
fi
|
|
endef
|
|
|
|
define LINUX_INSTALL_IMAGES_CMDS
|
|
$(call LINUX_INSTALL_IMAGE,$(BINARIES_DIR))
|
|
$(call LINUX_INSTALL_DTB,$(BINARIES_DIR))
|
|
endef
|
|
|
|
ifeq ($(BR2_STRIP_strip),y)
|
|
LINUX_MAKE_FLAGS += INSTALL_MOD_STRIP=1
|
|
endif
|
|
|
|
define LINUX_INSTALL_TARGET_CMDS
|
|
$(LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET)
|
|
# Install modules and remove symbolic links pointing to build
|
|
# directories, not relevant on the target
|
|
@if grep -q "CONFIG_MODULES=y" $(@D)/.config; then \
|
|
$(LINUX_MAKE_ENV) $(MAKE1) $(LINUX_MAKE_FLAGS) -C $(@D) modules_install; \
|
|
rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/build ; \
|
|
rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/source ; \
|
|
fi
|
|
$(LINUX_INSTALL_HOST_TOOLS)
|
|
endef
|
|
|
|
# Run depmod in a target-finalize hook, to encompass modules installed by
|
|
# packages.
|
|
define LINUX_RUN_DEPMOD
|
|
if test -d $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED) \
|
|
&& grep -q "CONFIG_MODULES=y" $(LINUX_DIR)/.config; then \
|
|
$(HOST_DIR)/sbin/depmod -a -b $(TARGET_DIR) $(LINUX_VERSION_PROBED); \
|
|
fi
|
|
endef
|
|
LINUX_TARGET_FINALIZE_HOOKS += LINUX_RUN_DEPMOD
|
|
|
|
# Include all our extensions.
|
|
#
|
|
# 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. Additionally, the full path of
|
|
# the package directory is also stored in _PKGDIR (e.g. to find patches)
|
|
#
|
|
# As such, including other Makefiles, like below, before we call one of
|
|
# the *-package macros usually doesn't work.
|
|
#
|
|
# However, by including the in-tree extensions after the ones from the
|
|
# br2-external trees, we're back to the situation where the last Makefile
|
|
# scanned *is* included from the correct directory.
|
|
#
|
|
# NOTE: this is very fragile, and extra care must be taken to ensure that
|
|
# we always end up with an in-tree included file. That's mostly OK, because
|
|
# we do have in-tree linux-extensions.
|
|
#
|
|
include $(sort $(wildcard $(foreach ext,$(BR2_EXTERNAL_DIRS), \
|
|
$(ext)/linux/linux-ext-*.mk)))
|
|
include $(sort $(wildcard linux/linux-ext-*.mk))
|
|
|
|
LINUX_PATCH_DEPENDENCIES += $(foreach ext,$(LINUX_EXTENSIONS),\
|
|
$(if $(BR2_LINUX_KERNEL_EXT_$(call UPPERCASE,$(ext))),$(ext)))
|
|
|
|
LINUX_PRE_PATCH_HOOKS += $(foreach ext,$(LINUX_EXTENSIONS),\
|
|
$(if $(BR2_LINUX_KERNEL_EXT_$(call UPPERCASE,$(ext))),\
|
|
$(call UPPERCASE,$(ext))_PREPARE_KERNEL))
|
|
|
|
# Checks to give errors that the user can understand
|
|
|
|
# When a custom repository has been set, check for the repository version
|
|
ifeq ($(BR2_LINUX_KERNEL_CUSTOM_SVN)$(BR2_LINUX_KERNEL_CUSTOM_GIT)$(BR2_LINUX_KERNEL_CUSTOM_HG),y)
|
|
ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION)),)
|
|
$(error No custom repository version set. Check your BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION setting)
|
|
endif
|
|
ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL)),)
|
|
$(error No custom repo URL set. Check your BR2_LINUX_KERNEL_CUSTOM_REPO_URL setting)
|
|
endif
|
|
endif
|
|
|
|
ifeq ($(BR_BUILDING),y)
|
|
|
|
ifeq ($(BR2_LINUX_KERNEL_CUSTOM_VERSION),y)
|
|
ifeq ($(LINUX_VERSION),)
|
|
$(error No custom kernel version set. Check your BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE setting)
|
|
endif
|
|
endif
|
|
|
|
ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
|
|
# We must use the user-supplied kconfig value, because
|
|
# LINUX_KCONFIG_DEFCONFIG will at least contain the
|
|
# trailing _defconfig
|
|
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 ($(LINUX_KCONFIG_FILE),)
|
|
$(error No kernel configuration file specified, check your BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE setting)
|
|
endif
|
|
endif
|
|
|
|
ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT):$(strip $(LINUX_DTS_NAME)),y:)
|
|
$(error No kernel device tree source specified, check your \
|
|
BR2_LINUX_KERNEL_INTREE_DTS_NAME / BR2_LINUX_KERNEL_CUSTOM_DTS_PATH settings)
|
|
endif
|
|
|
|
endif # BR_BUILDING
|
|
|
|
$(eval $(kconfig-package))
|
|
|
|
# Support for rebuilding the kernel after the cpio archive has
|
|
# been generated.
|
|
.PHONY: linux-rebuild-with-initramfs
|
|
linux-rebuild-with-initramfs: $(LINUX_DIR)/.stamp_target_installed
|
|
linux-rebuild-with-initramfs: $(LINUX_DIR)/.stamp_images_installed
|
|
linux-rebuild-with-initramfs: rootfs-cpio
|
|
linux-rebuild-with-initramfs:
|
|
@$(call MESSAGE,"Rebuilding kernel with initramfs")
|
|
# Build the kernel.
|
|
$(LINUX_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) $(LINUX_TARGET_NAME)
|
|
$(LINUX_APPEND_DTB)
|
|
# Copy the kernel image(s) to its(their) final destination
|
|
$(call LINUX_INSTALL_IMAGE,$(BINARIES_DIR))
|
|
# If there is a .ub file copy it to the final destination
|
|
test ! -f $(LINUX_IMAGE_PATH).ub || cp $(LINUX_IMAGE_PATH).ub $(BINARIES_DIR)
|