xref: /openbmc/u-boot/scripts/Makefile.autoconf (revision 4bb656e9)
1# This helper makefile is used for creating
2#  - symbolic links (arch/$ARCH/include/asm/arch
3#  - include/autoconf.mk, {spl,tpl}/include/autoconf.mk
4#  - include/config.h
5#
6# When our migration to Kconfig is done
7# (= When we move all CONFIGs from header files to Kconfig)
8# this makefile can be deleted.
9#
10# SPDX-License-Identifier:	GPL-2.0
11#
12
13__all: include/autoconf.mk include/autoconf.mk.dep
14
15ifeq ($(shell grep -q '^CONFIG_SPL=y' include/config/auto.conf 2>/dev/null && echo y),y)
16__all: spl/include/autoconf.mk
17endif
18
19ifeq ($(shell grep -q '^CONFIG_TPL=y' include/config/auto.conf 2>/dev/null && echo y),y)
20__all: tpl/include/autoconf.mk
21endif
22
23include include/config/auto.conf
24
25include scripts/Kbuild.include
26
27# Need to define CC and CPP again here in case the top Makefile did not
28# include config.mk.  Some architectures expect CROSS_COMPILE to be defined
29# in arch/$(ARCH)/config.mk
30CC		= $(CROSS_COMPILE)gcc
31CPP		= $(CC) -E
32
33include config.mk
34
35UBOOTINCLUDE    := \
36		-Iinclude \
37		$(if $(KBUILD_SRC), -I$(srctree)/include) \
38		-I$(srctree)/arch/$(ARCH)/include \
39		-include $(srctree)/include/linux/kconfig.h
40
41c_flags := $(KBUILD_CFLAGS) $(KBUILD_CPPFLAGS) $(PLATFORM_CPPFLAGS) \
42					$(UBOOTINCLUDE) $(NOSTDINC_FLAGS)
43
44quiet_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	}
49include/autoconf.mk.dep: 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
59quiet_cmd_autoconf = GEN     $@
60      cmd_autoconf = \
61	$(CPP) $(c_flags) $2 -DDO_DEPS_ONLY -dM $(srctree)/include/common.h > $@.tmp && { \
62		sed -n -f $(srctree)/tools/scripts/define2mk.sed $@.tmp |		\
63		while read line; do							\
64			if [ -n "${KCONFIG_IGNORE_DUPLICATES}" ] ||			\
65			   ! grep -q "$${line%=*}=" include/config/auto.conf; then	\
66				echo "$$line";						\
67			fi								\
68		done > $@;								\
69		rm $@.tmp;								\
70	} || {										\
71		rm $@.tmp; false;							\
72	}
73
74include/autoconf.mk: FORCE
75	$(call cmd,autoconf)
76
77spl/include/autoconf.mk: FORCE
78	$(Q)mkdir -p $(dir $@)
79	$(call cmd,autoconf,-DCONFIG_SPL_BUILD)
80
81tpl/include/autoconf.mk: FORCE
82	$(Q)mkdir -p $(dir $@)
83	$(call cmd,autoconf,-DCONFIG_SPL_BUILD -DCONFIG_TPL_BUILD)
84
85include/autoconf.mk include/autoconf.mk.dep \
86	spl/include/autoconf.mk tpl/include/autoconf.mk: include/config.h
87
88# include/config.h
89# Prior to Kconfig, it was generated by mkconfig. Now it is created here.
90define filechk_config_h
91	(echo "/* Automatically generated - do not edit */";		\
92	for i in $$(echo $(CONFIG_SYS_EXTRA_OPTIONS) | sed 's/,/ /g'); do \
93		echo \#define CONFIG_$$i				\
94		| sed '/=/ {s/=/	/;q; } ; { s/$$/	1/; }'; \
95	done;								\
96	echo \#define CONFIG_BOARDDIR board/$(if $(VENDOR),$(VENDOR)/)$(BOARD);\
97	echo \#include \<config_defaults.h\>;				\
98	echo \#include \<config_uncmd_spl.h\>;				\
99	echo \#include \<configs/$(CONFIG_SYS_CONFIG_NAME).h\>;		\
100	echo \#include \<asm/config.h\>;				\
101	echo \#include \<config_fallbacks.h\>;)
102endef
103
104include/config.h: scripts/Makefile.autoconf create_symlink FORCE
105	$(call filechk,config_h)
106
107# symbolic links
108# If arch/$(ARCH)/mach-$(SOC)/include/mach exists,
109# make a symbolic link to that directory.
110# Otherwise, create a symbolic link to arch/$(ARCH)/include/asm/arch-$(SOC).
111PHONY += create_symlink
112create_symlink:
113ifdef CONFIG_CREATE_ARCH_SYMLINK
114ifneq ($(KBUILD_SRC),)
115	$(Q)mkdir -p include/asm
116	$(Q)if [ -d $(KBUILD_SRC)/arch/$(ARCH)/mach-$(SOC)/include/mach ]; then	\
117		dest=arch/$(ARCH)/mach-$(SOC)/include/mach;			\
118	else									\
119		dest=arch/$(ARCH)/include/asm/arch-$(if $(SOC),$(SOC),$(CPU));	\
120	fi;									\
121	ln -fsn $(KBUILD_SRC)/$$dest include/asm/arch
122else
123	$(Q)if [ -d arch/$(ARCH)/mach-$(SOC)/include/mach ]; then	\
124		dest=../../mach-$(SOC)/include/mach;			\
125	else								\
126		dest=arch-$(if $(SOC),$(SOC),$(CPU));			\
127	fi;								\
128	ln -fsn $$dest arch/$(ARCH)/include/asm/arch
129endif
130endif
131
132PHONY += FORCE
133FORCE:
134
135.PHONY: $(PHONY)
136