xref: /openbmc/u-boot/scripts/Makefile.autoconf (revision 83d290c56fab2d38cd1ab4c4cc7099559c1d5046)
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)
147