xref: /openbmc/u-boot/Kbuild (revision 0b45a79f)
1#
2# Kbuild for top-level directory of U-Boot
3# This file takes care of the following:
4# 1) Generate generic-asm-offsets.h
5# 2) Generate asm-offsets.h
6
7# Default sed regexp - multiline due to syntax constraints
8define sed-y
9	"s:[[:space:]]*\.ascii[[:space:]]*\"\(.*\)\":\1:; \
10	/^->/{s:->#\(.*\):/* \1 */:; \
11	s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \
12	s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
13	s:->::; p;}"
14endef
15
16# Use filechk to avoid rebuilds when a header changes, but the resulting file
17# does not
18define filechk_offsets
19	(set -e; \
20	 echo "#ifndef $2"; \
21	 echo "#define $2"; \
22	 echo "/*"; \
23	 echo " * DO NOT MODIFY."; \
24	 echo " *"; \
25	 echo " * This file was generated by Kbuild"; \
26	 echo " */"; \
27	 echo ""; \
28	 sed -ne $(sed-y); \
29	 echo ""; \
30	 echo "#endif" )
31endef
32
33#####
34# 1) Generate generic-asm-offsets.h
35
36generic-offsets-file := include/generated/generic-asm-offsets.h
37
38always  := $(generic-offsets-file)
39targets := lib/asm-offsets.s
40
41# We use internal kbuild rules to avoid the "is up to date" message from make
42lib/asm-offsets.s: lib/asm-offsets.c FORCE
43	$(Q)mkdir -p $(dir $@)
44	$(call if_changed_dep,cc_s_c)
45
46$(obj)/$(generic-offsets-file): lib/asm-offsets.s FORCE
47	$(call filechk,offsets,__GENERIC_ASM_OFFSETS_H__)
48
49#####
50# 2) Generate asm-offsets.h
51#
52
53ifneq ($(wildcard $(srctree)/arch/$(ARCH)/lib/asm-offsets.c),)
54offsets-file := include/generated/asm-offsets.h
55endif
56
57always  += $(offsets-file)
58targets += arch/$(ARCH)/lib/asm-offsets.s
59
60CFLAGS_asm-offsets.o := -DDO_DEPS_ONLY
61
62# We use internal kbuild rules to avoid the "is up to date" message from make
63arch/$(ARCH)/lib/asm-offsets.s: arch/$(ARCH)/lib/asm-offsets.c FORCE
64	$(Q)mkdir -p $(dir $@)
65	$(call if_changed_dep,cc_s_c)
66
67$(obj)/$(offsets-file): arch/$(ARCH)/lib/asm-offsets.s FORCE
68	$(call filechk,offsets,__ASM_OFFSETS_H__)
69