scripts/Makefile.autoconf

   1 # This helper makefile is used for creating
   2 #  - symbolic links (arch/$ARCH/include/asm/arch
   3 #  - include/autoconf.mk, {spl,tpl}/include/autoconf.mk
   4 #  - include/config.h
   5 #
   6 # When our migration to Kconfig is done
   7 # (= When we move all CONFIGs from header files to Kconfig)
   8 # this makefile can be deleted.
   9 #
  10 # SPDX-License-Identifier:      GPL-2.0
  11 #
  12
  13 __all: include/autoconf.mk include/autoconf.mk.dep
  14
  15 ifeq ($(shell grep -q '^CONFIG_SPL=y' include/config/auto.conf 2>/dev/null && echo y),y)
  16 __all: spl/include/autoconf.mk
  17 endif
  18
  19 ifeq ($(shell grep -q '^CONFIG_TPL=y' include/config/auto.conf 2>/dev/null && echo y),y)
  20 __all: tpl/include/autoconf.mk
  21 endif
  22
  23 include include/config/auto.conf
  24
  25 include scripts/Kbuild.include
  26
  27 # Need to define CC and CPP again here in case the top Makefile did not
  28 # include config.mk.  Some architectures expect CROSS_COMPILE to be defined
  29 # in arch/$(ARCH)/config.mk
  30 CC              = $(CROSS_COMPILE)gcc
  31 CPP             = $(CC) -E
  32
  33 include config.mk
  34
  35 UBOOTINCLUDE    := \
  36                 -Iinclude \
  37                 $(if $(KBUILD_SRC), -I$(srctree)/include) \
  38                 -I$(srctree)/arch/$(ARCH)/include \
  39                 -include $(srctree)/include/linux/kconfig.h
  40
  41 c_flags := $(KBUILD_CFLAGS) $(KBUILD_CPPFLAGS) $(PLATFORM_CPPFLAGS) \
  42                                         $(UBOOTINCLUDE) $(NOSTDINC_FLAGS)
  43
  44 quiet_cmd_autoconf_dep = GEN     $@
  45       cmd_autoconf_dep = $(CC) -x c -DDO_DEPS_ONLY -M -MP $(c_flags) \
  46         -MQ include/config/auto.conf $(srctree)/include/common.h > $@ || {      \
  47                 rm $@; false;                                                   \
  48         }
  49 include/autoconf.mk.dep: include/config.h FORCE
  50         $(call cmd,autoconf_dep)
  51
  52 # We are migrating from board headers to Kconfig little by little.
  53 # In the interim, we use both of
  54 #  - include/config/auto.conf (generated by Kconfig)
  55 #  - include/autoconf.mk      (used in the U-Boot conventional configuration)
  56 # The following rule creates autoconf.mk
  57 # include/config/auto.conf is grepped in order to avoid duplication of the
  58 # same CONFIG macros
  59 quiet_cmd_autoconf = GEN     $@
  60       cmd_autoconf = \
  61                 sed -n -f $(srctree)/tools/scripts/define2mk.sed $< |                   \
  62                 while read line; do                                                     \
  63                         if [ -n "${KCONFIG_IGNORE_DUPLICATES}" ] ||                     \
  64                            ! grep -q "$${line%=*}=" include/config/auto.conf; then      \
  65                                 echo "$$line";                                          \
  66                         fi                                                              \
  67                 done > $@
  68
  69 quiet_cmd_u_boot_cfg = CFG     $@
  70       cmd_u_boot_cfg = \
  71         $(CPP) $(c_flags) $2 -DDO_DEPS_ONLY -dM $(srctree)/include/common.h > $@.tmp && { \
  72                 grep 'define CONFIG_' $@.tmp > $@;                      \
  73                 rm $@.tmp;                                              \
  74         } || {                                                          \
  75                 rm $@.tmp; false;                                       \
  76         }
  77
  78 u-boot.cfg: include/config.h FORCE
  79         $(call cmd,u_boot_cfg)
  80
  81 spl/u-boot.cfg: include/config.h FORCE
  82         $(Q)mkdir -p $(dir $@)
  83         $(call cmd,u_boot_cfg,-DCONFIG_SPL_BUILD)
  84
  85 tpl/u-boot.cfg: include/config.h FORCE
  86         $(Q)mkdir -p $(dir $@)
  87         $(call cmd,u_boot_cfg,-DCONFIG_SPL_BUILD -DCONFIG_TPL_BUILD)
  88
  89 include/autoconf.mk: u-boot.cfg
  90         $(call cmd,autoconf)
  91
  92 spl/include/autoconf.mk: spl/u-boot.cfg
  93         $(Q)mkdir -p $(dir $@)
  94         $(call cmd,autoconf)
  95
  96 tpl/include/autoconf.mk: tpl/u-boot.cfg
  97         $(Q)mkdir -p $(dir $@)
  98         $(call cmd,autoconf)
  99
 100 # include/config.h
 101 # Prior to Kconfig, it was generated by mkconfig. Now it is created here.
 102 define filechk_config_h
 103         (echo "/* Automatically generated - do not edit */";            \
 104         for i in $$(echo $(CONFIG_SYS_EXTRA_OPTIONS) | sed 's/,/ /g'); do \
 105                 echo \#define CONFIG_$$i                                \
 106                 | sed '/=/ {s/=/        /;q; } ; { s/$$/        1/; }'; \
 107         done;                                                           \
 108         echo \#define CONFIG_BOARDDIR board/$(if $(VENDOR),$(VENDOR)/)$(BOARD);\
 109         echo \#include \<config_defaults.h\>;                           \
 110         echo \#include \<config_uncmd_spl.h\>;                          \
 111         echo \#include \<configs/$(CONFIG_SYS_CONFIG_NAME).h\>;         \
 112         echo \#include \<asm/config.h\>;                                \
 113         echo \#include \<config_fallbacks.h\>;)
 114 endef
 115
 116 include/config.h: scripts/Makefile.autoconf create_symlink FORCE
 117         $(call filechk,config_h)
 118
 119 # symbolic links
 120 # If arch/$(ARCH)/mach-$(SOC)/include/mach exists,
 121 # make a symbolic link to that directory.
 122 # Otherwise, create a symbolic link to arch/$(ARCH)/include/asm/arch-$(SOC).
 123 PHONY += create_symlink
 124 create_symlink:
 125 ifdef CONFIG_CREATE_ARCH_SYMLINK
 126 ifneq ($(KBUILD_SRC),)
 127         $(Q)mkdir -p include/asm
 128         $(Q)if [ -d $(KBUILD_SRC)/arch/$(ARCH)/mach-$(SOC)/include/mach ]; then \
 129                 dest=arch/$(ARCH)/mach-$(SOC)/include/mach;                     \
 130         else                                                                    \
 131                 dest=arch/$(ARCH)/include/asm/arch-$(if $(SOC),$(SOC),$(CPU));  \
 132         fi;                                                                     \
 133         ln -fsn $(KBUILD_SRC)/$$dest include/asm/arch
 134 else
 135         $(Q)if [ -d arch/$(ARCH)/mach-$(SOC)/include/mach ]; then       \
 136                 dest=../../mach-$(SOC)/include/mach;                    \
 137         else                                                            \
 138                 dest=arch-$(if $(SOC),$(SOC),$(CPU));                   \
 139         fi;                                                             \
 140         ln -fsn $$dest arch/$(ARCH)/include/asm/arch
 141 endif
 142 endif
 143
 144 PHONY += FORCE
 145 FORCE:
 146
 147 .PHONY: $(PHONY)