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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: 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 $(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
74 include/autoconf.mk: FORCE
75 $(call cmd,autoconf)
76
77 spl/include/autoconf.mk: FORCE
78 $(Q)mkdir -p $(dir $@)
79 $(call cmd,autoconf,-DCONFIG_SPL_BUILD)
80
81 tpl/include/autoconf.mk: FORCE
82 $(Q)mkdir -p $(dir $@)
83 $(call cmd,autoconf,-DCONFIG_SPL_BUILD -DCONFIG_TPL_BUILD)
84
85 include/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.
90 define 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/$$/ 1/; }'; \
95 done; \
96 echo \#define CONFIG_BOARDDIR board/$(if $(VENDOR),$(VENDOR)/)$(BOARD);\
97 echo \#include \<config_defaults.h\>; \
98 echo \#include \<config_uncmd_spl.h\>; \
99 echo \#include \<configs/$(CONFIG_SYS_CONFIG_NAME).h\>; \
100 echo \#include \<asm/config.h\>; \
101 echo \#include \<config_fallbacks.h\>;)
102 endef
103
104 include/config.h: scripts/Makefile.autoconf create_symlink FORCE
105 $(call filechk,config_h)
106
107 # symbolic links
108 # If arch/$(ARCH)/mach-$(SOC)/include/mach exists,
109 # make a symbolic link to that directory.
110 # Otherwise, create a symbolic link to arch/$(ARCH)/include/asm/arch-$(SOC).
111 PHONY += create_symlink
112 create_symlink:
113 ifdef CONFIG_CREATE_ARCH_SYMLINK
114 ifneq ($(KBUILD_SRC),)
115 $(Q)mkdir -p include/asm
116 $(Q)if [ -d $(KBUILD_SRC)/arch/$(ARCH)/mach-$(SOC)/include/mach ]; then \
117 dest=arch/$(ARCH)/mach-$(SOC)/include/mach; \
118 else \
119 dest=arch/$(ARCH)/include/asm/arch-$(if $(SOC),$(SOC),$(CPU)); \
120 fi; \
121 ln -fsn $(KBUILD_SRC)/$$dest include/asm/arch
122 else
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
129 endif
130 endif
131
132 PHONY += FORCE
133 FORCE:
134
135 .PHONY: $(PHONY)