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 ($(shell grep -q '^CONFIG_TPL=y' include/config/auto.conf 2>/dev/null && echo y),y)
  18 __all: tpl/include/autoconf.mk
  19 endif
  20
  21 ifeq ($(shell grep -q '^CONFIG_VPL=y' include/config/auto.conf 2>/dev/null && echo y),y)
  22 __all: vpl/include/autoconf.mk
  23 endif
  24
  25 include include/config/auto.conf
  26
  27 include scripts/Kbuild.include
  28
  29 # Need to define CC and CPP again here in case the top Makefile did not
  30 # include config.mk.  Some architectures expect CROSS_COMPILE to be defined
  31 # in arch/$(ARCH)/config.mk
  32 CC              = $(CROSS_COMPILE)gcc
  33 CPP             = $(CC) -E
  34
  35 include config.mk
  36
  37 UBOOTINCLUDE    := \
  38                 -Iinclude \
  39                 $(if $(KBUILD_SRC), -I$(srctree)/include) \
  40                 -I$(srctree)/arch/$(ARCH)/include \
  41                 -include $(srctree)/include/linux/kconfig.h
  42
  43 c_flags := $(KBUILD_CFLAGS) $(KBUILD_CPPFLAGS) $(PLATFORM_CPPFLAGS) \
  44                                         $(UBOOTINCLUDE) $(NOSTDINC_FLAGS)
  45
  46 quiet_cmd_autoconf_dep = GEN     $@
  47       cmd_autoconf_dep = $(CC) -x c -DDO_DEPS_ONLY -M -MP $(c_flags) \
  48         -MQ include/config/auto.conf $(srctree)/include/common.h > $@ || {      \
  49                 rm $@; false;                                                   \
  50         }
  51 include/autoconf.mk.dep: include/config.h FORCE
  52         $(call cmd,autoconf_dep)
  53
  54 # We are migrating from board headers to Kconfig little by little.
  55 # In the interim, we use both of
  56 #  - include/config/auto.conf (generated by Kconfig)
  57 #  - include/autoconf.mk      (used in the U-Boot conventional configuration)
  58 # The following rule creates autoconf.mk
  59 # include/config/auto.conf is grepped in order to avoid duplication of the
  60 # same CONFIG macros
  61 quiet_cmd_autoconf = GEN     $@
  62       cmd_autoconf = \
  63                 sed -n -f $(srctree)/tools/scripts/define2mk.sed $< |                   \
  64                 while read line; do                                                     \
  65                         if [ -n "${KCONFIG_IGNORE_DUPLICATES}" ] ||                     \
  66                            ! grep -q "$${line%=*}=" include/config/auto.conf; then      \
  67                                 echo "$$line";                                          \
  68                         fi;                                                             \
  69                 done > $@
  70
  71 quiet_cmd_u_boot_cfg = CFG     $@
  72       cmd_u_boot_cfg = \
  73         $(CPP) $(c_flags) $2 -DDO_DEPS_ONLY -dM $(srctree)/include/common.h > $@.tmp && { \
  74                 grep 'define CONFIG_' $@.tmp | \
  75                         sed '/define CONFIG_IS_ENABLED(/d;/define CONFIG_IF_ENABLED_INT(/d;/define CONFIG_VAL(/d;' > $@; \
  76                 rm $@.tmp;                                              \
  77         } || {                                                          \
  78                 rm $@.tmp; false;                                       \
  79         }
  80
  81 u-boot.cfg: include/config.h FORCE
  82         $(call cmd,u_boot_cfg)
  83
  84 spl/u-boot.cfg: include/config.h FORCE
  85         $(Q)mkdir -p $(dir $@)
  86         $(call cmd,u_boot_cfg,-DCONFIG_SPL_BUILD)
  87
  88 tpl/u-boot.cfg: include/config.h FORCE
  89         $(Q)mkdir -p $(dir $@)
  90         $(call cmd,u_boot_cfg,-DCONFIG_SPL_BUILD -DCONFIG_TPL_BUILD)
  91
  92 vpl/u-boot.cfg: include/config.h FORCE
  93         $(Q)mkdir -p $(dir $@)
  94         $(call cmd,u_boot_cfg,-DCONFIG_SPL_BUILD -DCONFIG_VPL_BUILD)
  95
  96 include/autoconf.mk: u-boot.cfg
  97         $(call cmd,autoconf)
  98
  99 spl/include/autoconf.mk: spl/u-boot.cfg
 100         $(Q)mkdir -p $(dir $@)
 101         $(call cmd,autoconf)
 102
 103 tpl/include/autoconf.mk: tpl/u-boot.cfg
 104         $(Q)mkdir -p $(dir $@)
 105         $(call cmd,autoconf)
 106
 107 vpl/include/autoconf.mk: vpl/u-boot.cfg
 108         $(Q)mkdir -p $(dir $@)
 109         $(call cmd,autoconf)
 110
 111 # include/config.h
 112 # Prior to Kconfig, it was generated by mkconfig. Now it is created here.
 113 define filechk_config_h
 114         (echo "/* Automatically generated - do not edit */";            \
 115         echo \#define CFG_BOARDDIR board/$(if $(VENDOR),$(VENDOR)/)$(BOARD);\
 116         echo \#include \<configs/$(CONFIG_SYS_CONFIG_NAME).h\>;         \
 117         echo \#include \<asm/config.h\>;                                \
 118         echo \#include \<linux/kconfig.h\>;                             \
 119         echo \#include \<config_fallbacks.h\>;)
 120 endef
 121
 122 include/config.h: scripts/Makefile.autoconf create_symlink FORCE
 123         $(call filechk,config_h)
 124
 125 # symbolic links
 126 # If arch/$(ARCH)/mach-$(SOC)/include/mach exists,
 127 # make a symbolic link to that directory.
 128 # Otherwise, create a symbolic link to arch/$(ARCH)/include/asm/arch-$(SOC).
 129 PHONY += create_symlink
 130 create_symlink:
 131 ifdef CONFIG_CREATE_ARCH_SYMLINK
 132 ifneq ($(KBUILD_SRC),)
 133         $(Q)mkdir -p include/asm
 134         $(Q)if [ -d $(KBUILD_SRC)/arch/$(ARCH)/mach-$(SOC)/include/mach ]; then \
 135                 dest=arch/$(ARCH)/mach-$(SOC)/include/mach;                     \
 136         else                                                                    \
 137                 dest=arch/$(ARCH)/include/asm/arch-$(if $(SOC),$(SOC),$(CPU));  \
 138         fi;                                                                     \
 139         ln -fsn $(KBUILD_SRC)/$$dest include/asm/arch
 140 else
 141         $(Q)if [ -d arch/$(ARCH)/mach-$(SOC)/include/mach ]; then       \
 142                 dest=../../mach-$(SOC)/include/mach;                    \
 143         else                                                            \
 144                 dest=arch-$(if $(SOC),$(SOC),$(CPU));                   \
 145         fi;                                                             \
 146         ln -fsn $$dest arch/$(ARCH)/include/asm/arch
 147 endif
 148 endif
 149
 150 PHONY += FORCE
 151 FORCE:
 152
 153 .PHONY: $(PHONY)