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5f6a10f1e1
Currently silentoldconfig uses the default values in Kconfig when .config does
not exist or is for a different platform from the one specified in command line
options. This makes it impossible to leverage defconfigs when a simple 'make' is
invoked to build the hypervisor, as 'make' calls oldconfig instead of defconfig
for creating a configuration file.
With DEFCONFIG_LIST in Kconfig, now silentoldconfig is also able to know which
defconfig is appropriate given the specified board. This patch changes the
behavior of oldsilentconfig as follows.
1. When an old .config for the given board exists, the script updates the
.config per configurations specified from the command line. Instead of
manually resetting all symbols, the script now relies on Kconfiglib's
internal logic to automatically update invisible symbols after symbol
value changes.
2. When an old .config does not exist or is not for the specified board, the
defconfig for that board is used as base line and further tweaked per
configurations from the command line.
v3 -> v4:
* Rephrase comments in silentoldconfig.py.
v2 -> v3:
* Keep backward compatibility of silentoldconfig.py since vmcfg also uses the
script.
v1 -> v2:
* Include .config when it is edited manually so that new configurations
overwritten the old (in the outdated config.mk).
* Compare the board in .config with the one in the defconfig instead of what is
specified in the environment variable BOARD, as defconfig and BOARD may use
different names (e.g. aliases or different cases)
Tracked-On: #1588
Signed-off-by: Junjie Mao <junjie.mao@intel.com>
Reviewed-by: Anthony Xu <anthony.xu@intel.com>
116 lines
3.6 KiB
Makefile
116 lines
3.6 KiB
Makefile
# usage: override_config <symbol> <default>
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#
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# Given a configuration symbol (without the CONFIG_ prefix), this macro
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# overrides its value as follows.
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# 1. If a value is specified from command line, that value is used.
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# 2. If neither config.mk nor the command line specifies a value, the given
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# default is used.
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define override_config =
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ifdef $(1)
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CONFIG_$(1) := $($(1))
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else ifndef CONFIG_$(1)
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CONFIG_$(1) := $(2)
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endif
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endef
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HV_CONFIG := .config
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HV_DEFCONFIG := defconfig
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HV_CONFIG_H := include/config.h
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HV_CONFIG_MK := include/config.mk
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KCONFIG_DIR := $(BASEDIR)/../scripts/kconfig
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# Backward-compatibility for RELEASE=(0|1)
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ifdef RELEASE
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ifeq ($(RELEASE),1)
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override RELEASE := y
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else
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override RELEASE := n
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endif
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endif
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-include $(HV_OBJDIR)/$(HV_CONFIG_MK)
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ifeq ($(shell [ $(HV_OBJDIR)/$(HV_CONFIG) -nt $(HV_OBJDIR)/$(HV_CONFIG_MK) ] && echo 1),1)
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# config.mk may be outdated if .config has been overwritten. To update config.mk
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# in such cases, we include .config again to get the new configurations. This
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# only happens when GNU make checks the prerequisites.
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-include $(HV_OBJDIR)/$(HV_CONFIG)
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endif
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# Backward-compatibility for PLATFORM=(sbl|uefi)
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# * PLATFORM=sbl is equivalent to BOARD=apl-mrb
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# * PLATFORM=uefi is equivalent to BOARD=apl-nuc (i.e. NUC6CAYH)
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ifndef BOARD
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ifeq ($(PLATFORM),sbl)
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BOARD=apl-mrb
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else ifeq ($(PLATFORM),uefi)
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BOARD=apl-nuc
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endif
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endif
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$(eval $(call override_config,BOARD,apl-mrb))
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$(eval $(call override_config,RELEASE,n))
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ifdef BOARD
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TARGET_BOARD=$(BOARD)
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else
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TARGET_BOARD=$(CONFIG_BOARD)
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endif
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$(eval $(call check_dep_exec,python3,KCONFIG_DEPS))
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$(eval $(call check_dep_py3lib,kconfiglib,KCONFIG_DEPS))
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# This target invoke silentoldconfig to generate or update a .config. Useful as
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# a prerequisite of other targets depending on .config.
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#
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# A dummy command is necessary to trigger the remaking of config.mk right after
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# oldconfig changes HV_CONFIG in the same execution of make.
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$(HV_OBJDIR)/$(HV_CONFIG): oldconfig
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@true
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# Note: This target must not depend on a phony target (e.g. oldconfig) because
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# it'll trigger endless re-execution of make.
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$(HV_OBJDIR)/$(HV_CONFIG_MK): $(HV_OBJDIR)/$(HV_CONFIG)
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@mkdir -p $(dir $@)
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@sed 's/="\(.*\)"$$/=\1/g' $(HV_OBJDIR)/$(HV_CONFIG) > $@
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$(HV_OBJDIR)/$(HV_CONFIG_H): $(HV_OBJDIR)/$(HV_CONFIG)
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@mkdir -p $(dir $@)
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@python3 $(KCONFIG_DIR)/generate_header.py Kconfig $< $@
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# This target forcefully generate a .config based on a given default
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# one. Overwrite the current .config if it exists.
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.PHONY: defconfig
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defconfig: $(KCONFIG_DEPS)
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@mkdir -p $(HV_OBJDIR)
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@BOARD=$(TARGET_BOARD) \
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python3 $(KCONFIG_DIR)/defconfig.py Kconfig \
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$(HV_OBJDIR)/$(HV_CONFIG)
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# Use silentoldconfig to forcefully update the current .config, or generate a
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# new one if no previous .config exists. This target can be used as a
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# prerequisite of all the others to make sure that the .config is consistent
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# even it has been modified manually before.
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.PHONY: oldconfig
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oldconfig: $(KCONFIG_DEPS)
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@mkdir -p $(HV_OBJDIR)
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@BOARD=$(TARGET_BOARD) \
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python3 $(KCONFIG_DIR)/silentoldconfig.py Kconfig \
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$(HV_OBJDIR)/$(HV_CONFIG) \
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RELEASE=$(RELEASE)
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# Minimize the current .config. This target can be used to generate a defconfig
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# for future use.
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.PHONY: savedefconfig
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savedefconfig: $(HV_OBJDIR)/$(HV_CONFIG)
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@python3 $(KCONFIG_DIR)/savedefconfig.py Kconfig \
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$(HV_OBJDIR)/$(HV_CONFIG) \
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$(HV_OBJDIR)/$(HV_DEFCONFIG)
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$(eval $(call check_dep_exec,menuconfig,MENUCONFIG_DEPS))
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export KCONFIG_CONFIG := $(HV_OBJDIR)/$(HV_CONFIG)
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menuconfig: $(MENUCONFIG_DEPS) $(HV_OBJDIR)/$(HV_CONFIG)
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@python3 $(shell which menuconfig) Kconfig
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CFLAGS += -include $(HV_OBJDIR)/$(HV_CONFIG_H)
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