The default DEFCONFIG_<ARCH> may not always work for all architectures, some architectures require to add extra kernel config options, this adds a new 'extconfig' target for this requirement. It allows to customize extra kernel config options via the common common.config and the architecture specific <ARCH>.config, at last trigger 'allnoconfig' to let them take effect with missing config options as disabled. The scripts/kconfig/merge_config.sh tool is used to merge the extra config files. Suggested-by: Thomas Weißschuh <linux@xxxxxxxxxxxxxx> Link: https://lore.kernel.org/lkml/67eb70d4-c9ff-4afc-bac7-7f36cc2c81bc@xxxxxxxx/ Signed-off-by: Zhangjin Wu <falcon@xxxxxxxxxxx> --- tools/testing/selftests/nolibc/Makefile | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/tools/testing/selftests/nolibc/Makefile b/tools/testing/selftests/nolibc/Makefile index f42adef87e12..08a5ca5f418b 100644 --- a/tools/testing/selftests/nolibc/Makefile +++ b/tools/testing/selftests/nolibc/Makefile @@ -39,6 +39,9 @@ DEFCONFIG_s390 = defconfig DEFCONFIG_loongarch = defconfig DEFCONFIG = $(DEFCONFIG_$(ARCH)) +# extra kernel config files under configs/, include common + architecture specific +EXTCONFIG = common.config $(ARCH).config + # optional tests to run (default = all) TEST = @@ -162,6 +165,10 @@ initramfs: nolibc-test defconfig: $(Q)$(MAKE) -C $(srctree) ARCH=$(ARCH) CC=$(CC) CROSS_COMPILE=$(CROSS_COMPILE) mrproper $(DEFCONFIG) prepare +extconfig: + $(Q)$(srctree)/scripts/kconfig/merge_config.sh -O "$(srctree)" -m "$(srctree)/.config" $(foreach c,$(EXTCONFIG),$(wildcard $(CURDIR)/configs/$c)) + $(Q)$(MAKE) -C $(srctree) ARCH=$(ARCH) CC=$(CC) CROSS_COMPILE=$(CROSS_COMPILE) KCONFIG_ALLCONFIG="$(srctree)/.config" allnoconfig + kernel: initramfs $(Q)$(MAKE) -C $(srctree) ARCH=$(ARCH) CC=$(CC) CROSS_COMPILE=$(CROSS_COMPILE) $(IMAGE_NAME) CONFIG_INITRAMFS_SOURCE=$(CURDIR)/initramfs -- 2.25.1
