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makefiles/kconfig: Output out.config with generated configuration

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'merged.config' may not always be present (e.g. when no files to merge
are present). In order to always have an up-to-date configuration file
'out.config' will be generated mirroring the content of 'autoconf.h'.
This is the file that the build system will include to read the current
configuration symbols.
This commit is contained in:
Leandro Lanzieri 2020-02-18 14:17:12 +01:00
parent 45afaa0faf
commit 4ae944bac2
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GPG Key ID: 39607DE6080007A3
1 changed files with 11 additions and 3 deletions
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14
makefiles/kconfig.mk
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@ -30,6 +30,11 @@ KCONFIG_USER_CONFIG = $(APPDIR)/user.config
# one that is used to generate the 'riotconf.h' header
KCONFIG_MERGED_CONFIG = $(GENERATED_DIR)/merged.config
# This is the output of the generated configuration. It always mirrors the
# content of KCONFIG_GENERATED_AUTOCONF_HEADER_C, and it is used to load
# configuration symbols to the build system.
KCONFIG_OUT_CONFIG = $(GENERATED_DIR)/out.config
# Include configuration symbols if available, only when not cleaning. This
# allows to check for Kconfig symbols in makefiles.
# Make tries to 'remake' all included files
@ -39,7 +44,7 @@ KCONFIG_MERGED_CONFIG = $(GENERATED_DIR)/merged.config
# This has the side effect of requiring a Kconfig user to run 'clean' on a
# separate call (e.g. 'make clean && make all'), to get the symbols correctly.
ifneq ($(CLEAN),clean)
-include $(KCONFIG_MERGED_CONFIG)
-include $(KCONFIG_OUT_CONFIG)
endif
# Flag that indicates that the configuration has been edited
@ -116,6 +121,9 @@ $(KCONFIG_MERGED_CONFIG): $(MERGECONFIG) $(KCONFIG_GENERATED_DEPENDENCIES) FORCE
# Build a header file with all the Kconfig configurations. genconfig will avoid
# any unnecessary rewrites of the header file if no configurations changed.
$(KCONFIG_GENERATED_AUTOCONF_HEADER_C): $(KCONFIG_GENERATED_DEPENDENCIES) $(GENCONFIG) $(KCONFIG_MERGED_CONFIG) FORCE
$(Q)KCONFIG_CONFIG=$(KCONFIG_MERGED_CONFIG) $(GENCONFIG) --header-path $@ $(KCONFIG)
$(KCONFIG_OUT_CONFIG) $(KCONFIG_GENERATED_AUTOCONF_HEADER_C) &: $(KCONFIG_GENERATED_DEPENDENCIES) $(GENCONFIG) $(KCONFIG_MERGED_CONFIG) FORCE
$(Q) \
KCONFIG_CONFIG=$(KCONFIG_MERGED_CONFIG) $(GENCONFIG) \
--config-out=$(KCONFIG_OUT_CONFIG) \
--header-path $(KCONFIG_GENERATED_AUTOCONF_HEADER_C) $(KCONFIG)
endif