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[packages/trusty/cirros-testvm.git] / cirros-testvm / src-cirros / buildroot-2015.05 / package / pkg-kconfig.mk

diff --git a/cirros-testvm/src-cirros/buildroot-2015.05/package/pkg-kconfig.mk b/cirros-testvm/src-cirros/buildroot-2015.05/package/pkg-kconfig.mk
new file mode 100644 (file)
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+++ b/cirros-testvm/src-cirros/buildroot-2015.05/package/pkg-kconfig.mk
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+################################################################################
+# Kconfig package infrastructure
+#
+# This file implements an infrastructure that eases development of
+# package .mk files for packages that use kconfig for configuration files.
+# It is based on the generic-package infrastructure, and inherits all of its
+# features.
+#
+# See the Buildroot documentation for details on the usage of this
+# infrastructure.
+#
+################################################################################
+
+################################################################################
+# inner-kconfig-package -- generates the make targets needed to support a
+# kconfig package
+#
+#  argument 1 is the lowercase package name
+#  argument 2 is the uppercase package name, including a HOST_ prefix
+#             for host packages
+#  argument 3 is the uppercase package name, without the HOST_ prefix
+#             for host packages
+#  argument 4 is the type (target or host)
+################################################################################
+
+define inner-kconfig-package
+
+# Call the generic package infrastructure to generate the necessary
+# make targets.
+# Note: this must be done _before_ attempting to use $$($(2)_DIR) in a
+# dependency expression
+$(call inner-generic-package,$(1),$(2),$(3),$(4))
+
+# Default values
+$(2)_KCONFIG_EDITORS ?= menuconfig
+$(2)_KCONFIG_OPTS ?=
+$(2)_KCONFIG_FIXUP_CMDS ?=
+
+# The config file could be in-tree, so before depending on it the package should
+# be extracted (and patched) first
+$$($(2)_KCONFIG_FILE): | $(1)-patch
+
+# The .config file is obtained by copying it from the specified source
+# configuration file, after the package has been patched.
+# Since the file could be a defconfig file it needs to be expanded to a
+# full .config first. We use 'make oldconfig' because this can be safely
+# done even when the package does not support defconfigs.
+$$($(2)_DIR)/.config: $$($(2)_KCONFIG_FILE)
+       $$(INSTALL) -m 0644 $$($(2)_KCONFIG_FILE) $$($(2)_DIR)/.config
+       @yes "" | $$($(2)_MAKE_ENV) $$(MAKE) -C $$($(2)_DIR) \
+               $$($(2)_KCONFIG_OPTS) oldconfig
+
+# In order to get a usable, consistent configuration, some fixup may be needed.
+# The exact rules are specified by the package .mk file.
+$$($(2)_DIR)/.stamp_kconfig_fixup_done: $$($(2)_DIR)/.config
+       $$($(2)_KCONFIG_FIXUP_CMDS)
+       @yes "" | $$($(2)_MAKE_ENV) $$(MAKE) -C $$($(2)_DIR) \
+               $$($(2)_KCONFIG_OPTS) oldconfig
+       $$(Q)touch $$@
+
+# Before running configure, the configuration file should be present and fixed
+$$($(2)_TARGET_CONFIGURE): $$($(2)_DIR)/.stamp_kconfig_fixup_done
+
+# Only enable the foo-*config targets when the package is actually enabled.
+# Note: the variable $(2)_KCONFIG_VAR is not related to the kconfig
+# infrastructure, but defined by pkg-generic.mk. The generic infrastructure is
+# already called above, so we can effectively use this variable.
+ifeq ($$($$($(2)_KCONFIG_VAR)),y)
+
+# FOO_KCONFIG_FILE is required
+ifndef $(2)_KCONFIG_FILE
+$$(error Internal error: no value specified for $(2)_KCONFIG_FILE)
+endif
+
+# Configuration editors (menuconfig, ...)
+$$(addprefix $(1)-,$$($(2)_KCONFIG_EDITORS)): $$($(2)_DIR)/.stamp_kconfig_fixup_done
+       $$($(2)_MAKE_ENV) $$(MAKE) -C $$($(2)_DIR) \
+               $$($(2)_KCONFIG_OPTS) $$(subst $(1)-,,$$@)
+       rm -f $$($(2)_DIR)/.stamp_{kconfig_fixup_done,configured,built}
+       rm -f $$($(2)_DIR)/.stamp_{target,staging,images}_installed
+
+$(1)-savedefconfig: $$($(2)_DIR)/.stamp_kconfig_fixup_done
+       $$($(2)_MAKE_ENV) $$(MAKE) -C $$($(2)_DIR) \
+               $$($(2)_KCONFIG_OPTS) savedefconfig
+
+# Target to copy back the configuration to the source configuration file
+# Even though we could use 'cp --preserve-timestamps' here, the separate
+# cp and 'touch --reference' is used for symmetry with $(1)-update-defconfig.
+$(1)-update-config: $$($(2)_DIR)/.stamp_kconfig_fixup_done
+       cp -f $$($(2)_DIR)/.config $$($(2)_KCONFIG_FILE)
+       touch --reference $$($(2)_DIR)/.config $$($(2)_KCONFIG_FILE)
+
+# Note: make sure the timestamp of the stored configuration is not newer than
+# the .config to avoid a useless rebuild. Note that, contrary to
+# $(1)-update-config, the reference for 'touch' is _not_ the file from which
+# we copy.
+$(1)-update-defconfig: $(1)-savedefconfig
+       cp -f $$($(2)_DIR)/defconfig $$($(2)_KCONFIG_FILE)
+       touch --reference $$($(2)_DIR)/.config $$($(2)_KCONFIG_FILE)
+
+endif # package enabled
+
+.PHONY: \
+       $(1)-update-config \
+       $(1)-update-defconfig \
+       $(1)-savedefconfig \
+       $$(addprefix $(1)-,$$($(2)_KCONFIG_EDITORS))
+
+endef # inner-kconfig-package
+
+################################################################################
+# kconfig-package -- the target generator macro for kconfig packages
+################################################################################
+
+kconfig-package = $(call inner-kconfig-package,$(pkgname),$(call UPPERCASE,$(pkgname)),$(call UPPERCASE,$(pkgname)),target)