2015-07-23 23:55:28 +02:00
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################################################################################
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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 = 4.1.1
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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 = GPLv2
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LINUX_BACKPORTS_LICENSE_FILES = COPYING
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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 = $(LINUX_BACKPORTS_MAKE_OPTS)
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2015-07-23 23:55:29 +02:00
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# linux-backports' build system expects the config options to be present
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# in the environment, and it is so when using their custom buildsystem,
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# because they are set in the main Makefile, which then calls a second
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# Makefile.
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#
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# In our case, we do not use that first Makefile. So, we parse the
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# .config file, filter-out comment lines and put the rest as command
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# line variables.
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#
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# LINUX_BACKPORTS_MAKE_OPTS is used by the kconfig-package infra, while
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# LINUX_BACKPORTS_MODULE_MAKE_OPTS is used by the kernel-module infra.
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#
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LINUX_BACKPORTS_MAKE_OPTS = \
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BACKPORT_DIR=$(@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 = $(LINUX_BACKPORTS_MAKE_OPTS)
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# This file is not automatically generated by 'oldconfig' that we use in
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# the kconfig-package infrastructure. In the linux buildsystem, it is
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# generated by running silentoldconfig, but that's not the case for
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# linux-backports: it uses a hand-crafted rule to generate that file.
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define LINUX_BACKPORTS_KCONFIG_FIXUP_CMDS
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$(MAKE) -C $(@D) $(LINUX_BACKPORTS_MAKE_OPTS) backport-include/backport/autoconf.h
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endef
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2015-07-23 23:55:28 +02:00
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# Checks to give errors that the user can understand
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ifeq ($(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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2015-07-23 23:55:29 +02:00
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$(eval $(kernel-module))
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2015-07-23 23:55:28 +02:00
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$(eval $(kconfig-package))
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# linux-backports' own .config file needs options from the kernel's own
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# .config file. The dependencies handling in the infrastructure does not
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# allow to express this kind of dependencies. Besides, linux.mk might
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# not have been parsed yet, so the Linux build dir LINUX_DIR is not yet
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# known. Thus, we use a "secondary expansion" so the rule is re-evaluated
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# after all Makefiles are parsed, and thus at that time we will have the
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# LINUX_DIR variable set to the proper value.
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#
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# Furthermore, we want to check the kernel version, since linux-backports
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# only supports kernels >= 3.0. To avoid overriding linux-backports'
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# .config rule defined in the kconfig-package infra, we use an
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# intermediate stamp-file.
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#
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# Finally, it must also come after the call to kconfig-package, so we get
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# LINUX_BACKPORTS_DIR properly defined (because the target part of the
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# rule is not re-evaluated).
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#
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$(LINUX_BACKPORTS_DIR)/.config: $(LINUX_BACKPORTS_DIR)/.stamp_check_kernel_version
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.SECONDEXPANSION:
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$(LINUX_BACKPORTS_DIR)/.stamp_check_kernel_version: $$(LINUX_DIR)/.config
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$(Q)LINUX_VERSION_PROBED=$(LINUX_VERSION_PROBED); \
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if [ $${LINUX_VERSION_PROBED%%.*} -lt 3 ]; then \
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printf "Linux version '%s' is too old for linux-backports (needs 3.0 or later)\n" \
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"$${LINUX_VERSION_PROBED}"; \
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exit 1; \
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fi
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$(Q)touch $(@)
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