c52fedf063
Attempting to compile this package with newer Kernel version (e.g. v5.4) fails with message: Generating local configuration database from kernel ...Kernel version parse failed! Upgrading the package to 5.8 fixes this issue. Anyways, v4.4 is now rather old and beat the very purpose of having newer drivers in older kernels. Since backports tag v4.14-rc4-1, the requirement on minimal kernel version changed from 3.0 to 3.10. See commit [1]. The minimal kernel version check is changed accordingly. License files are also updated: the linux backports package copies the license files from the kernel version used for its generation. v5.8 is now "GPL-2.0 WITH Linux-syscall-note". However, there is no such SPDX identifier (contrary to what is said in the COPYING file), so we keep it as GPL-2.0 (which also keeps it aligned to what we have in linux.mk). [1] https://git.kernel.org/pub/scm/linux/kernel/git/backports/backports.git/commit/?id=a0d05f9f9ca50ea8b1d60726fac6b54167257e76 Signed-off-by: Julien Olivain <ju.o@free.fr> Reviewed-by: Petr Vorel <petr.vorel@gmail.com> Tested-by: Petr Vorel <petr.vorel@gmail.com> [yann.morin.1998@free.fr: keep license as GPL-2.0, like for linux] Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
118 lines
5 KiB
Makefile
118 lines
5 KiB
Makefile
################################################################################
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#
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# linux-backports
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#
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################################################################################
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LINUX_BACKPORTS_VERSION_MAJOR = 5.8
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LINUX_BACKPORTS_VERSION = $(LINUX_BACKPORTS_VERSION_MAJOR)-1
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LINUX_BACKPORTS_SOURCE = backports-$(LINUX_BACKPORTS_VERSION).tar.xz
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LINUX_BACKPORTS_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/projects/backports/stable/v$(LINUX_BACKPORTS_VERSION_MAJOR)
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LINUX_BACKPORTS_LICENSE = GPL-2.0
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LINUX_BACKPORTS_LICENSE_FILES = \
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COPYING \
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LICENSES/exceptions/Linux-syscall-note \
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LICENSES/preferred/GPL-2.0
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# flex and bison are needed to generate kconfig parser. We use the
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# same logic as the linux kernel (we add host dependencies only if
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# host does not have them). See linux/linux.mk and
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# support/dependencies/check-host-bison-flex.mk.
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LINUX_BACKPORTS_DEPENDENCIES = \
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$(BR2_BISON_HOST_DEPENDENCY) \
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$(BR2_FLEX_HOST_DEPENDENCY)
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ifeq ($(BR2_PACKAGE_LINUX_BACKPORTS_USE_DEFCONFIG),y)
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LINUX_BACKPORTS_KCONFIG_FILE = $(LINUX_BACKPORTS_DIR)/defconfigs/$(call qstrip,$(BR2_PACKAGE_LINUX_BACKPORTS_DEFCONFIG))
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else ifeq ($(BR2_PACKAGE_LINUX_BACKPORTS_USE_CUSTOM_CONFIG),y)
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LINUX_BACKPORTS_KCONFIG_FILE = $(call qstrip,$(BR2_PACKAGE_LINUX_BACKPORTS_CUSTOM_CONFIG_FILE))
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endif
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LINUX_BACKPORTS_KCONFIG_FRAGMENT_FILES = $(call qstrip,$(BR2_PACKAGE_LINUX_BACKPORTS_CONFIG_FRAGMENT_FILES))
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LINUX_BACKPORTS_KCONFIG_OPTS = $(LINUX_BACKPORTS_MAKE_OPTS)
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# linux-backports' build system expects the config options to be present
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# in the environment, and it is so when using their custom buildsystem,
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# because they are set in the main Makefile, which then calls a second
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# Makefile.
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#
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# In our case, we do not use that first Makefile. So, we parse the
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# .config file, filter-out comment lines and put the rest as command
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# line variables.
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#
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# LINUX_BACKPORTS_MAKE_OPTS is used by the kconfig-package infra, while
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# LINUX_BACKPORTS_MODULE_MAKE_OPTS is used by the kernel-module infra.
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#
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LINUX_BACKPORTS_MAKE_OPTS = \
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LEX=flex \
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YACC=bison \
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BACKPORT_DIR=$(@D) \
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KLIB_BUILD=$(LINUX_DIR) \
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KLIB=$(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED) \
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INSTALL_MOD_DIR=backports \
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`sed -r -e '/^\#/d;' $(@D)/.config`
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LINUX_BACKPORTS_MODULE_MAKE_OPTS = $(LINUX_BACKPORTS_MAKE_OPTS)
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# This file is not automatically generated by 'oldconfig' that we use in
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# the kconfig-package infrastructure. In the linux buildsystem, it is
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# generated by running silentoldconfig, but that's not the case for
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# linux-backports: it uses a hand-crafted rule to generate that file.
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define LINUX_BACKPORTS_KCONFIG_FIXUP_CMDS
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$(TARGET_MAKE_ENV) $(MAKE) -C $(@D) $(LINUX_BACKPORTS_MAKE_OPTS) backport-include/backport/autoconf.h
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endef
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# Checks to give errors that the user can understand
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ifeq ($(BR_BUILDING),y)
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ifeq ($(BR2_PACKAGE_LINUX_BACKPORTS_USE_DEFCONFIG),y)
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ifeq ($(call qstrip,$(BR2_PACKAGE_LINUX_BACKPORTS_DEFCONFIG)),)
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$(error No linux-backports defconfig name specified, check your BR2_PACKAGE_LINUX_BACKPORTS_DEFCONFIG setting)
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endif
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endif
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ifeq ($(BR2_PACKAGE_LINUX_BACKPORTS_USE_CUSTOM_CONFIG),y)
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ifeq ($(call qstrip,$(BR2_PACKAGE_LINUX_BACKPORTS_CUSTOM_CONFIG_FILE)),)
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$(error No linux-backports configuration file specified, check your BR2_PACKAGE_LINUX_BACKPORTS_CUSTOM_CONFIG_FILE setting)
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endif
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endif
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endif # BR_BUILDING
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$(eval $(kernel-module))
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$(eval $(kconfig-package))
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# linux-backports' own .config file needs options from the kernel's own
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# .config file. The dependencies handling in the infrastructure does not
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# allow to express this kind of dependencies. Besides, linux.mk might
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# not have been parsed yet, so the Linux build dir LINUX_DIR is not yet
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# known. Thus, we use a "secondary expansion" so the rule is re-evaluated
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# after all Makefiles are parsed, and thus at that time we will have the
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# LINUX_DIR variable set to the proper value. Moreover, since linux-4.19,
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# the kernel's build system internally touches its .config file, so we
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# can't use it as a stamp file. We use the LINUX_KCONFIG_STAMP_DOTCONFIG
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# instead.
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#
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# Furthermore, we want to check the kernel version, since linux-backports
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# only supports kernels >= 3.10. To avoid overriding linux-backports'
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# KCONFIG_STAMP_DOTCONFIG rule defined in the kconfig-package infra, we
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# use an intermediate stamp-file.
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#
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# Finally, it must also come after the call to kconfig-package, so we get
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# LINUX_BACKPORTS_DIR properly defined (because the target part of the
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# rule is not re-evaluated).
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#
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$(LINUX_BACKPORTS_DIR)/$(LINUX_BACKPORTS_KCONFIG_STAMP_DOTCONFIG): $(LINUX_BACKPORTS_DIR)/.stamp_check_kernel_version
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.SECONDEXPANSION:
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$(LINUX_BACKPORTS_DIR)/.stamp_check_kernel_version: $$(LINUX_DIR)/$$(LINUX_KCONFIG_STAMP_DOTCONFIG)
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$(Q)KVER=$(LINUX_VERSION_PROBED); \
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KVER_MAJOR=`echo $${KVER} | sed 's/^\([0-9]*\)\..*/\1/'`; \
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KVER_MINOR=`echo $${KVER} | sed 's/^[0-9]*\.\([0-9]*\).*/\1/'`; \
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if [ $${KVER_MAJOR} -lt 3 -o \( $${KVER_MAJOR} -eq 3 -a $${KVER_MINOR} -lt 10 \) ]; then \
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printf "Linux version '%s' is too old for linux-backports (needs 3.10 or later)\n" \
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"$${KVER}"; \
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exit 1; \
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fi
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$(Q)touch $(@)
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