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authorKees Cook <keescook@chromium.org>2023-08-31 12:13:39 -0700
committerMasahiro Yamada <masahiroy@kernel.org>2023-09-04 02:04:20 +0900
commitfeec5e1f74f5b735c0c5c02ec70673db1334173f (patch)
tree0089441a74b7b520bc6d9ab585a65e86395fc33b /scripts/kconfig
parent7cd343008b967423b06af8f6d3236749c67d12e8 (diff)
kbuild: Show marked Kconfig fragments in "help"
Currently the Kconfig fragments in kernel/configs and arch/*/configs that aren't used internally aren't discoverable through "make help", which consists of hard-coded lists of config fragments. Instead, list all the fragment targets that have a "# Help: " comment prefix so the targets can be generated dynamically. Add logic to the Makefile to search for and display the fragment and comment. Add comments to fragments that are intended to be direct targets. Signed-off-by: Kees Cook <keescook@chromium.org> Co-developed-by: Masahiro Yamada <masahiroy@kernel.org> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Reviewed-by: Nicolas Schier <nicolas@fjasle.eu> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'scripts/kconfig')
-rw-r--r--scripts/kconfig/Makefile15
1 files changed, 12 insertions, 3 deletions
diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index af1c96198f49..4eee155121a8 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -93,11 +93,13 @@ endif
%_defconfig: $(obj)/conf
$(Q)$< $(silent) --defconfig=arch/$(SRCARCH)/configs/$@ $(Kconfig)
-configfiles=$(wildcard $(srctree)/kernel/configs/$@ $(srctree)/arch/$(SRCARCH)/configs/$@)
+configfiles = $(wildcard $(srctree)/kernel/configs/$(1) $(srctree)/arch/$(SRCARCH)/configs/$(1))
+all-config-fragments = $(call configfiles,*.config)
+config-fragments = $(call configfiles,$@)
%.config: $(obj)/conf
- $(if $(call configfiles),, $(error No configuration exists for this target on this architecture))
- $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh -m .config $(configfiles)
+ $(if $(config-fragments),, $(error $@ fragment does not exists on this architecture))
+ $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh -m .config $(config-fragments)
$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
PHONY += tinyconfig
@@ -115,6 +117,7 @@ clean-files += tests/.cache
# Help text used by make help
help:
+ @echo 'Configuration targets:'
@echo ' config - Update current config utilising a line-oriented program'
@echo ' nconfig - Update current config utilising a ncurses menu based program'
@echo ' menuconfig - Update current config utilising a menu based program'
@@ -141,6 +144,12 @@ help:
@echo ' default value without prompting'
@echo ' tinyconfig - Configure the tiniest possible kernel'
@echo ' testconfig - Run Kconfig unit tests (requires python3 and pytest)'
+ @echo ''
+ @echo 'Configuration topic targets:'
+ @$(foreach f, $(all-config-fragments), \
+ if help=$$(grep -m1 '^# Help: ' $(f)); then \
+ printf ' %-25s - %s\n' '$(notdir $(f))' "$${help#*: }"; \
+ fi;)
# ===========================================================================
# object files used by all kconfig flavours