scripts/Makefile.autoconf

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