From 51148790f26e42ef1fd4a1a8d056bf0252539525 Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Wed, 30 Jul 2014 14:08:17 +0900 Subject: kconfig: switch to Kconfig This commit enables Kconfig. Going forward, we use Kconfig for the board configuration. mkconfig will never be used. Nor will include/config.mk be generated. Kconfig must be adjusted for U-Boot because our situation is a little more complicated than Linux Kernel. We have to generate multiple boot images (Normal, SPL, TPL) from one source tree. Each image needs its own configuration input. Usage: Run "make _defconfig" to do the board configuration. It will create the .config file and additionally spl/.config, tpl/.config if SPL, TPL is enabled, respectively. You can use "make config", "make menuconfig" etc. to create a new .config or modify the existing one. Use "make spl/config", "make spl/menuconfig" etc. for spl/.config and do likewise for tpl/.config file. The generic syntax of configuration targets for SPL, TPL is: / Here, is either 'spl' or 'tpl' is 'config', 'menuconfig', 'xconfig', etc. When the configuration is done, run "make". (Or "make _defconfig all" will do the configuration and build in one time.) For futher information of how Kconfig works in U-Boot, please read the comment block of scripts/multiconfig.py. By the way, there is another item worth remarking here: coexistence of Kconfig and board herder files. Prior to Kconfig, we used C headers to define a set of configs. We expect a very long term to migrate from C headers to Kconfig. Two different infractructure must coexist in the interim. In our former configuration scheme, include/autoconf.mk was generated for use in makefiles. It is still generated under include/, spl/include/, tpl/include/ directory for the Normal, SPL, TPL image, respectively. Signed-off-by: Masahiro Yamada Acked-by: Simon Glass --- scripts/Makefile.autoconf | 100 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 100 insertions(+) create mode 100644 scripts/Makefile.autoconf (limited to 'scripts/Makefile.autoconf') diff --git a/scripts/Makefile.autoconf b/scripts/Makefile.autoconf new file mode 100644 index 0000000000..44c39970f3 --- /dev/null +++ b/scripts/Makefile.autoconf @@ -0,0 +1,100 @@ +# This helper makefile is used for creating +# - symbolic links (arch/$ARCH/include/asm/arch +# - include/autoconf.mk, {spl,tpl}/include/autoconf.mk +# - include/config.h +# +# When our migration to Kconfig is done +# (= When we move all CONFIGs from header files to Kconfig) +# this makefile can be deleted. + +# obj is "include" or "spl/include" or "tpl/include" +# for non-SPL, SPL, TPL, respectively +include $(obj)/config/auto.conf + +include scripts/Kbuild.include + +# Need to define CC and CPP again here in case the top Makefile did not +# include config.mk. Some architectures expect CROSS_COMPILE to be defined +# in arch/$(ARCH)/config.mk +CC = $(CROSS_COMPILE)gcc +CPP = $(CC) -E + +include config.mk + +UBOOTINCLUDE := \ + -I$(obj) \ + -Iinclude \ + $(if $(KBUILD_SRC), -I$(srctree)/include) \ + -I$(srctree)/arch/$(ARCH)/include \ + -include $(srctree)/include/linux/kconfig.h + +c_flags := $(KBUILD_CFLAGS) $(KBUILD_CPPFLAGS) $(PLATFORM_CPPFLAGS) \ + $(UBOOTINCLUDE) $(NOSTDINC_FLAGS) + +quiet_cmd_autoconf_dep = GEN $@ + cmd_autoconf_dep = $(CC) -x c -DDO_DEPS_ONLY -M -MP $(c_flags) \ + -MQ include/config/auto.conf $(srctree)/include/common.h > $@ || { \ + rm $@; false; \ + } +include/autoconf.mk.dep: FORCE + $(call cmd,autoconf_dep) + +# We are migrating from board headers to Kconfig little by little. +# In the interim, we use both of +# - include/config/auto.conf (generated by Kconfig) +# - include/autoconf.mk (used in the U-Boot conventional configuration) +# The following rule creates autoconf.mk +# include/config/auto.conf is grepped in order to avoid duplication of the +# same CONFIG macros +quiet_cmd_autoconf = GEN $@ + cmd_autoconf = \ + $(CPP) $(c_flags) -DDO_DEPS_ONLY -dM $(srctree)/include/common.h > $@.tmp && { \ + sed -n -f $(srctree)/tools/scripts/define2mk.sed $@.tmp | \ + while read line; do \ + if ! grep -q "$${line%=*}=" $(obj)/config/auto.conf; then \ + echo "$$line"; \ + fi \ + done > $@; \ + rm $@.tmp; \ + } || { \ + rm $@.tmp; false; \ + } + +$(obj)/autoconf.mk: FORCE + $(call cmd,autoconf) + +include/autoconf.mk include/autoconf.mk.dep: include/config.h + +# include/config.h +# Prior to Kconfig, it was generated by mkconfig. Now it is created here. +define filechk_config_h + (echo "/* Automatically generated - do not edit */"; \ + for i in $$(echo $(CONFIG_SYS_EXTRA_OPTIONS) | sed 's/,/ /g'); do \ + echo \#define CONFIG_$$i \ + | sed '/=/ {s/=/ /;q; } ; { s/$$/ 1/; }'; \ + done; \ + echo \#define CONFIG_BOARDDIR board/$(if $(VENDOR),$(VENDOR)/)$(BOARD);\ + echo \#include \; \ + echo \#include \; \ + echo \#include \; \ + echo \#include \; \ + echo \#include \; \ + echo \#include \; ) +endef + +include/config.h: scripts/Makefile.autoconf create_symlink FORCE + $(call filechk,config_h) + +# symbolic links +PHONY += create_symlink +create_symlink: +ifneq ($(KBUILD_SRC),) + $(Q)mkdir -p include/asm +endif + $(Q)ln -fsn $(srctree)/arch/$(ARCH)/include/asm/arch-$(if $(SOC),$(SOC),$(CPU)) \ + $(if $(KBUILD_SRC),,arch/$(ARCH)/)include/asm/arch + +PHONY += FORCE +FORCE: + +.PHONY: $(PHONY) -- cgit v1.2.1