scripts/Makefile.autoconf

   1 # This helper makefile is used for creating
   2 #  - symbolic links (arch/$ARCH/include/asm/arch
   3 #  - include/autoconf.mk, {spl,tpl}/include/autoconf.mk
   4 #  - include/config.h
   5 #
   6 # When our migration to Kconfig is done
   7 # (= When we move all CONFIGs from header files to Kconfig)
   8 # this makefile can be deleted.
   9
  10 # obj is "include" or "spl/include" or "tpl/include"
  11 # for non-SPL, SPL, TPL, respectively
  12 include $(obj)/config/auto.conf
  13
  14 include scripts/Kbuild.include
  15
  16 # Need to define CC and CPP again here in case the top Makefile did not
  17 # include config.mk.  Some architectures expect CROSS_COMPILE to be defined
  18 # in arch/$(ARCH)/config.mk
  19 CC              = $(CROSS_COMPILE)gcc
  20 CPP             = $(CC) -E
  21
  22 include config.mk
  23
  24 UBOOTINCLUDE    := \
  25                 -I$(obj) \
  26                 -Iinclude \
  27                 $(if $(KBUILD_SRC), -I$(srctree)/include) \
  28                 -I$(srctree)/arch/$(ARCH)/include \
  29                 -include $(srctree)/include/linux/kconfig.h
  30
  31 c_flags := $(KBUILD_CFLAGS) $(KBUILD_CPPFLAGS) $(PLATFORM_CPPFLAGS) \
  32                                         $(UBOOTINCLUDE) $(NOSTDINC_FLAGS)
  33
  34 quiet_cmd_autoconf_dep = GEN     $@
  35       cmd_autoconf_dep = $(CC) -x c -DDO_DEPS_ONLY -M -MP $(c_flags) \
  36         -MQ include/config/auto.conf $(srctree)/include/common.h > $@ || {      \
  37                 rm $@; false;                                                   \
  38         }
  39 include/autoconf.mk.dep: FORCE
  40         $(call cmd,autoconf_dep)
  41
  42 # We are migrating from board headers to Kconfig little by little.
  43 # In the interim, we use both of
  44 #  - include/config/auto.conf (generated by Kconfig)
  45 #  - include/autoconf.mk      (used in the U-Boot conventional configuration)
  46 # The following rule creates autoconf.mk
  47 # include/config/auto.conf is grepped in order to avoid duplication of the
  48 # same CONFIG macros
  49 quiet_cmd_autoconf = GEN     $@
  50       cmd_autoconf = \
  51         $(CPP) $(c_flags) -DDO_DEPS_ONLY -dM $(srctree)/include/common.h > $@.tmp && {  \
  52                 sed -n -f $(srctree)/tools/scripts/define2mk.sed $@.tmp |               \
  53                 while read line; do                                                     \
  54                         if ! grep -q "$${line%=*}=" $(obj)/config/auto.conf; then       \
  55                                 echo "$$line";                                          \
  56                         fi                                                              \
  57                 done > $@;                                                              \
  58                 rm $@.tmp;                                                              \
  59         } || {                                                                          \
  60                 rm $@.tmp; false;                                                       \
  61         }
  62
  63 $(obj)/autoconf.mk: FORCE
  64         $(call cmd,autoconf)
  65
  66 include/autoconf.mk include/autoconf.mk.dep: include/config.h
  67
  68 # include/config.h
  69 # Prior to Kconfig, it was generated by mkconfig. Now it is created here.
  70 define filechk_config_h
  71         (echo "/* Automatically generated - do not edit */";            \
  72         for i in $$(echo $(CONFIG_SYS_EXTRA_OPTIONS) | sed 's/,/ /g'); do \
  73                 echo \#define CONFIG_$$i                                \
  74                 | sed '/=/ {s/=/        /;q; } ; { s/$$/        1/; }'; \
  75         done;                                                           \
  76         echo \#define CONFIG_BOARDDIR board/$(if $(VENDOR),$(VENDOR)/)$(BOARD);\
  77         echo \#include \<config_cmd_defaults.h\>;                       \
  78         echo \#include \<config_defaults.h\>;                           \
  79         echo \#include \<configs/$(CONFIG_SYS_CONFIG_NAME).h\>;         \
  80         echo \#include \<asm/config.h\>;                                \
  81         echo \#include \<config_fallbacks.h\>;                          \
  82         echo \#include \<config_uncmd_spl.h\>; )
  83 endef
  84
  85 include/config.h: scripts/Makefile.autoconf create_symlink FORCE
  86         $(call filechk,config_h)
  87
  88 # symbolic links
  89 PHONY += create_symlink
  90 create_symlink:
  91 ifneq ($(KBUILD_SRC),)
  92         $(Q)mkdir -p include/asm
  93 endif
  94         $(Q)ln -fsn $(srctree)/arch/$(ARCH)/include/asm/arch-$(if $(SOC),$(SOC),$(CPU)) \
  95                 $(if $(KBUILD_SRC),,arch/$(ARCH)/)include/asm/arch
  96
  97 PHONY += FORCE
  98 FORCE:
  99
 100 .PHONY: $(PHONY)