31b70a487f
After we exit the configurators, we need to re-run the kconfig fixups to ensure the user is not able to override them in the configurators. Currently, we schedule that "for later", by removing the corresponding stamp file, so make will run the fixups "later". This means the user has access to the un-fixed .config file, which he might decide to copy and use as a reference (not too bad, since we'd run the fixups anyway; but not clean either). Note that we still remove the stamp file before running the fixups, in case any one of those fixups breaks, so we don't want to believe the fixups have been applied; the fixup macro will touch that file anyway. Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
155 lines
6.4 KiB
Makefile
155 lines
6.4 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 $$($(2)_DIR) in a
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# dependency expression
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$(call inner-generic-package,$(1),$(2),$(3),$(4))
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# Default values
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$(2)_KCONFIG_EDITORS ?= menuconfig
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$(2)_KCONFIG_OPTS ?=
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$(2)_KCONFIG_FIXUP_CMDS ?=
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$(2)_KCONFIG_FRAGMENT_FILES ?=
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# The config file as well as the fragments could be in-tree, so before
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# depending on them the package should be extracted (and patched) first.
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#
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# Since those files only have a order-only dependency, make would treat
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# any missing one as a "force" target:
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# https://www.gnu.org/software/make/manual/make.html#Force-Targets
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# and would forcibly any rule that depend on those files, causing a
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# rebuild of the kernel each time make is called.
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#
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# So, we provide a recipe that checks all of those files exist, to
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# overcome that standard make behaviour.
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#
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$$($(2)_KCONFIG_FILE) $$($(2)_KCONFIG_FRAGMENT_FILES): | $(1)-patch
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for f in $$($(2)_KCONFIG_FILE) $$($(2)_KCONFIG_FRAGMENT_FILES); do \
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if [ ! -f "$$$${f}" ]; then \
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printf "Kconfig fragment '%s' for '%s' does not exist\n" "$$$${f}" "$(1)"; \
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exit 1; \
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fi; \
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done
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# The specified source configuration file and any additional configuration file
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# fragments are merged together to .config, after the package has been patched.
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# Since the file could be a defconfig file it needs to be expanded to a
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# full .config first. We use 'make oldconfig' because this can be safely
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# done even when the package does not support defconfigs.
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$$($(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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$$($(2)_KCONFIG_OPTS) oldconfig
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# In order to get a usable, consistent configuration, some fixup may be needed.
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# The exact rules are specified by the package .mk file.
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define $(2)_FIXUP_DOT_CONFIG
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$$($(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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$$(Q)touch $$($(2)_DIR)/.stamp_kconfig_fixup_done
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endef
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$$($(2)_DIR)/.stamp_kconfig_fixup_done: $$($(2)_DIR)/.config
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$$(call $(2)_FIXUP_DOT_CONFIG)
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# Before running configure, the configuration file should be present and fixed
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$$($(2)_TARGET_CONFIGURE): $$($(2)_DIR)/.stamp_kconfig_fixup_done
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# Only enable the foo-*config targets when the package is actually enabled.
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# Note: the variable $(2)_KCONFIG_VAR is not related to the kconfig
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# infrastructure, but defined by pkg-generic.mk. The generic infrastructure is
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# already called above, so we can effectively use this variable.
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ifeq ($$($$($(2)_KCONFIG_VAR)),y)
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# FOO_KCONFIG_FILE is required
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ifeq ($$($(2)_KCONFIG_FILE),)
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$$(error Internal error: no value specified for $(2)_KCONFIG_FILE)
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endif
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# Configuration editors (menuconfig, ...)
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#
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# Apply the kconfig fixups right after exiting the configurators, so
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# that the user always sees a .config file that is clean wrt. our
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# requirements.
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#
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# Because commands in $(1)_FIXUP_KCONFIG are probably using $(@D), we
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# fake it for the configurators (otherwise it is set to just '.', i.e.
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# the current directory where make is run, which happens to be in
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# $(TOPDIR), because the target of the rule is not an actual file, so
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# does not have any path component).
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#
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$$(addprefix $(1)-,$$($(2)_KCONFIG_EDITORS)): @D=$$($(2)_DIR)
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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 $$($(2)_DIR)/.stamp_{target,staging,images}_installed
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$$(call $(2)_FIXUP_DOT_CONFIG)
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$(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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