scripts/Makefile.autoconf

   1 # This helper makefile is used for creating
   2 #  - symbolic links (arch/$ARCH/include/asm/arch
   3 #  - include/autoconf.mk, {spl,tpl}/include/autoconf.mk
   4 #  - include/config.h
   5 #
   6 # When our migration to Kconfig is done
   7 # (= When we move all CONFIGs from header files to Kconfig)
   8 # this makefile can be deleted.
   9
  10 __all: include/autoconf.mk include/autoconf.mk.dep
  11
  12 ifeq ($(shell grep -q '^CONFIG_SPL=y' include/config/auto.conf 2>/dev/null && echo y),y)
  13 __all: spl/include/autoconf.mk
  14 endif
  15
  16 ifeq ($(shell grep -q '^CONFIG_TPL=y' include/config/auto.conf 2>/dev/null && echo y),y)
  17 __all: tpl/include/autoconf.mk
  18 endif
  19
  20 include include/config/auto.conf
  21
  22 include scripts/Kbuild.include
  23
  24 # Need to define CC and CPP again here in case the top Makefile did not
  25 # include config.mk.  Some architectures expect CROSS_COMPILE to be defined
  26 # in arch/$(ARCH)/config.mk
  27 CC              = $(CROSS_COMPILE)gcc
  28 CPP             = $(CC) -E
  29
  30 include config.mk
  31
  32 UBOOTINCLUDE    := \
  33                 -Iinclude \
  34                 $(if $(KBUILD_SRC), -I$(srctree)/include) \
  35                 -I$(srctree)/arch/$(ARCH)/include \
  36                 -include $(srctree)/include/linux/kconfig.h
  37
  38 c_flags := $(KBUILD_CFLAGS) $(KBUILD_CPPFLAGS) $(PLATFORM_CPPFLAGS) \
  39                                         $(UBOOTINCLUDE) $(NOSTDINC_FLAGS)
  40
  41 quiet_cmd_autoconf_dep = GEN     $@
  42       cmd_autoconf_dep = $(CC) -x c -DDO_DEPS_ONLY -M -MP $(c_flags) \
  43         -MQ include/config/auto.conf $(srctree)/include/common.h > $@ || {      \
  44                 rm $@; false;                                                   \
  45         }
  46 include/autoconf.mk.dep: FORCE
  47         $(call cmd,autoconf_dep)
  48
  49 # We are migrating from board headers to Kconfig little by little.
  50 # In the interim, we use both of
  51 #  - include/config/auto.conf (generated by Kconfig)
  52 #  - include/autoconf.mk      (used in the U-Boot conventional configuration)
  53 # The following rule creates autoconf.mk
  54 # include/config/auto.conf is grepped in order to avoid duplication of the
  55 # same CONFIG macros
  56 quiet_cmd_autoconf = GEN     $@
  57       cmd_autoconf = \
  58         $(CPP) $(c_flags) $2 -DDO_DEPS_ONLY -dM $(srctree)/include/common.h > $@.tmp && { \
  59                 sed -n -f $(srctree)/tools/scripts/define2mk.sed $@.tmp |               \
  60                 while read line; do                                                     \
  61                         if ! grep -q "$${line%=*}=" include/config/auto.conf; then      \
  62                                 echo "$$line";                                          \
  63                         fi                                                              \
  64                 done > $@;                                                              \
  65                 rm $@.tmp;                                                              \
  66         } || {                                                                          \
  67                 rm $@.tmp; false;                                                       \
  68         }
  69
  70 include/autoconf.mk: FORCE
  71         $(call cmd,autoconf)
  72
  73 spl/include/autoconf.mk: FORCE
  74         $(Q)mkdir -p $(dir $@)
  75         $(call cmd,autoconf,-DCONFIG_SPL_BUILD)
  76
  77 tpl/include/autoconf.mk: FORCE
  78         $(Q)mkdir -p $(dir $@)
  79         $(call cmd,autoconf,-DCONFIG_SPL_BUILD -DCONFIG_TPL_BUILD)
  80
  81 include/autoconf.mk include/autoconf.mk.dep \
  82         spl/include/autoconf.mk tpl/include/autoconf.mk: include/config.h
  83
  84 # include/config.h
  85 # Prior to Kconfig, it was generated by mkconfig. Now it is created here.
  86 define filechk_config_h
  87         (echo "/* Automatically generated - do not edit */";            \
  88         for i in $$(echo $(CONFIG_SYS_EXTRA_OPTIONS) | sed 's/,/ /g'); do \
  89                 echo \#define CONFIG_$$i                                \
  90                 | sed '/=/ {s/=/        /;q; } ; { s/$$/        1/; }'; \
  91         done;                                                           \
  92         echo \#define CONFIG_BOARDDIR board/$(if $(VENDOR),$(VENDOR)/)$(BOARD);\
  93         echo \#include \<config_defaults.h\>;                           \
  94         echo \#include \<config_uncmd_spl.h\>;                          \
  95         echo \#include \<configs/$(CONFIG_SYS_CONFIG_NAME).h\>;         \
  96         echo \#include \<asm/config.h\>;                                \
  97         echo \#include \<config_fallbacks.h\>;)
  98 endef
  99
 100 include/config.h: scripts/Makefile.autoconf create_symlink FORCE
 101         $(call filechk,config_h)
 102
 103 # symbolic links
 104 # If arch/$(ARCH)/mach-$(SOC)/include/mach exists,
 105 # make a symbolic link to that directory.
 106 # Otherwise, create a symbolic link to arch/$(ARCH)/include/asm/arch-$(SOC).
 107 PHONY += create_symlink
 108 create_symlink:
 109 ifneq ($(KBUILD_SRC),)
 110         $(Q)mkdir -p include/asm
 111         $(Q)if [ -d $(KBUILD_SRC)/arch/$(ARCH)/mach-$(SOC)/include/mach ]; then \
 112                 dest=arch/$(ARCH)/mach-$(SOC)/include/mach;                     \
 113         else                                                                    \
 114                 dest=arch/$(ARCH)/include/asm/arch-$(if $(SOC),$(SOC),$(CPU));  \
 115         fi;                                                                     \
 116         ln -fsn $(KBUILD_SRC)/$$dest include/asm/arch
 117 else
 118         $(Q)if [ -d arch/$(ARCH)/mach-$(SOC)/include/mach ]; then       \
 119                 dest=../../mach-$(SOC)/include/mach;                    \
 120         else                                                            \
 121                 dest=arch-$(if $(SOC),$(SOC),$(CPU));                   \
 122         fi;                                                             \
 123         ln -fsn $$dest arch/$(ARCH)/include/asm/arch
 124 endif
 125
 126 PHONY += FORCE
 127 FORCE:
 128
 129 .PHONY: $(PHONY)