0cfb5549b3
Adds functionality to the kconfig infrastructure to merge additional
configuration fragment files to the main configuration file of
kconfig packages, using support/kconfig/merge_config.sh
Typical use-case is when you want your configuration to be
kept in sync with an upstream (def)config file, but do require
some minor local modifications.
Disables -update-config and -update-defconfig targets when
fragment files are set.
[Thomas: take into account comments made by Arnout:
- Minor fixes in the documentation changes
- Add @ before the tests done in the $(1)-update-config and
$(1)-update-defconfig targets.]
Signed-off-by: Floris Bos <bos@je-eigen-domein.nl>
Tested-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Tested-by: Gergely Imreh <imrehg@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
122 lines
5.1 KiB
Makefile
122 lines
5.1 KiB
Makefile
################################################################################
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# Kconfig package infrastructure
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#
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# This file implements an infrastructure that eases development of
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# package .mk files for packages that use kconfig for configuration files.
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# It is based on the generic-package infrastructure, and inherits all of its
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# features.
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#
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# See the Buildroot documentation for details on the usage of this
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# infrastructure.
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#
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################################################################################
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################################################################################
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# inner-kconfig-package -- generates the make targets needed to support a
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# kconfig package
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#
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# argument 1 is the lowercase package name
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# argument 2 is the uppercase package name, including a HOST_ prefix
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# for host packages
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# argument 3 is the uppercase package name, without the HOST_ prefix
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# for host packages
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# argument 4 is the type (target or host)
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################################################################################
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define inner-kconfig-package
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# Call the generic package infrastructure to generate the necessary
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# make targets.
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# Note: this must be done _before_ attempting to use $$($(2)_DIR) in a
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# dependency expression
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$(call inner-generic-package,$(1),$(2),$(3),$(4))
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# Default values
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$(2)_KCONFIG_EDITORS ?= menuconfig
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$(2)_KCONFIG_OPTS ?=
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$(2)_KCONFIG_FIXUP_CMDS ?=
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$(2)_KCONFIG_FRAGMENT_FILES ?=
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# The config file could be in-tree, so before depending on it the package should
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# be extracted (and patched) first
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$$($(2)_KCONFIG_FILE): | $(1)-patch
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# The specified source configuration file and any additional configuration file
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# fragments are merged together to .config, after the package has been patched.
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# Since the file could be a defconfig file it needs to be expanded to a
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# full .config first. We use 'make oldconfig' because this can be safely
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# done even when the package does not support defconfigs.
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$$($(2)_DIR)/.config: $$($(2)_KCONFIG_FILE) $$($(2)_KCONFIG_FRAGMENT_FILES)
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support/kconfig/merge_config.sh -m -O $$(@D) \
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$$($(2)_KCONFIG_FILE) $$($(2)_KCONFIG_FRAGMENT_FILES)
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@yes "" | $$($(2)_MAKE_ENV) $$(MAKE) -C $$($(2)_DIR) \
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$$($(2)_KCONFIG_OPTS) oldconfig
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# In order to get a usable, consistent configuration, some fixup may be needed.
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# The exact rules are specified by the package .mk file.
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$$($(2)_DIR)/.stamp_kconfig_fixup_done: $$($(2)_DIR)/.config
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$$($(2)_KCONFIG_FIXUP_CMDS)
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@yes "" | $$($(2)_MAKE_ENV) $$(MAKE) -C $$($(2)_DIR) \
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$$($(2)_KCONFIG_OPTS) oldconfig
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$$(Q)touch $$@
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# Before running configure, the configuration file should be present and fixed
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$$($(2)_TARGET_CONFIGURE): $$($(2)_DIR)/.stamp_kconfig_fixup_done
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# Only enable the foo-*config targets when the package is actually enabled.
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# Note: the variable $(2)_KCONFIG_VAR is not related to the kconfig
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# infrastructure, but defined by pkg-generic.mk. The generic infrastructure is
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# already called above, so we can effectively use this variable.
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ifeq ($$($$($(2)_KCONFIG_VAR)),y)
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# FOO_KCONFIG_FILE is required
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ifndef $(2)_KCONFIG_FILE
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$$(error Internal error: no value specified for $(2)_KCONFIG_FILE)
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endif
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# Configuration editors (menuconfig, ...)
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$$(addprefix $(1)-,$$($(2)_KCONFIG_EDITORS)): $$($(2)_DIR)/.stamp_kconfig_fixup_done
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$$($(2)_MAKE_ENV) $$(MAKE) -C $$($(2)_DIR) \
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$$($(2)_KCONFIG_OPTS) $$(subst $(1)-,,$$@)
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rm -f $$($(2)_DIR)/.stamp_{kconfig_fixup_done,configured,built}
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rm -f $$($(2)_DIR)/.stamp_{target,staging,images}_installed
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$(1)-savedefconfig: $$($(2)_DIR)/.stamp_kconfig_fixup_done
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$$($(2)_MAKE_ENV) $$(MAKE) -C $$($(2)_DIR) \
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$$($(2)_KCONFIG_OPTS) savedefconfig
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# Target to copy back the configuration to the source configuration file
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# Even though we could use 'cp --preserve-timestamps' here, the separate
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# cp and 'touch --reference' is used for symmetry with $(1)-update-defconfig.
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$(1)-update-config: $$($(2)_DIR)/.stamp_kconfig_fixup_done
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@$$(if $$($(2)_KCONFIG_FRAGMENT_FILES), \
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echo "Unable to perform $(1)-update-config when fragment files are set"; exit 1)
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cp -f $$($(2)_DIR)/.config $$($(2)_KCONFIG_FILE)
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touch --reference $$($(2)_DIR)/.config $$($(2)_KCONFIG_FILE)
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# Note: make sure the timestamp of the stored configuration is not newer than
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# the .config to avoid a useless rebuild. Note that, contrary to
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# $(1)-update-config, the reference for 'touch' is _not_ the file from which
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# we copy.
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$(1)-update-defconfig: $(1)-savedefconfig
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@$$(if $$($(2)_KCONFIG_FRAGMENT_FILES), \
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echo "Unable to perform $(1)-update-defconfig when fragment files are set"; exit 1)
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cp -f $$($(2)_DIR)/defconfig $$($(2)_KCONFIG_FILE)
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touch --reference $$($(2)_DIR)/.config $$($(2)_KCONFIG_FILE)
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endif # package enabled
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.PHONY: \
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$(1)-update-config \
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$(1)-update-defconfig \
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$(1)-savedefconfig \
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$$(addprefix $(1)-,$$($(2)_KCONFIG_EDITORS))
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endef # inner-kconfig-package
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################################################################################
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# kconfig-package -- the target generator macro for kconfig packages
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################################################################################
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kconfig-package = $(call inner-kconfig-package,$(pkgname),$(call UPPERCASE,$(pkgname)),$(call UPPERCASE,$(pkgname)),target)
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