1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
AR = ar
CC = gcc
CFLAGS = -g
arch = x86_64
cflags = -pipe -std=c99 -nostdinc -D_XOPEN_SOURCE=700 \
-ffreestanding -fexcess-precision=standard -fno-strict-aliasing \
-frounding-math -fno-pic -fno-stack-protector \
-fno-unwind-tables -fno-asynchronous-unwind-tables \
-ffunction-sections -fdata-sections \
-Iarch/$(arch) -Iarch/generic -Isrc/include -Isrc/internal \
-Igenerated/include -Iinclude $(CFLAGS)
prefix = /tmp/root
includedir = $(prefix)/include
libdir = $(prefix)/lib
src_dirs = crt src/* src/mallocng
common_src = $(wildcard $(addsuffix /*.c, $(src_dirs)))
arch_src = $(wildcard $(addsuffix /$(arch)/*.[csS], $(src_dirs)))
common_obj = $(common_src:.c=.o)
arch_obj = $(patsubst %, %.o, $(basename $(arch_src)))
replaced_obj = $(subst /$(arch)/,/, $(arch_obj))
all_obj = $(sort $(filter-out $(replaced_obj), $(common_obj) $(arch_obj)))
memops_obj = $(filter %/memcpy.o %/memmove.o %/memcmp.o %/memset.o, $(all_obj))
crt_obj = $(filter crt/%, $(all_obj))
generated_headers = $(addprefix generated/include/bits/, \
alltypes.h syscall.h)
implementation_headers = $(addprefix src/internal/, \
stdio_impl.h pthread_impl.h locale_impl.h libc.h)
lib_obj = libc.a crt1.o crti.o crtn.o
arch_inc = $(wildcard arch/$(arch)/bits/*.h)
generic_inc = $(wildcard arch/generic/bits/*.h)
inc = $(wildcard include/*.h include/*/*.h)
all_inc = $(sort $(inc) $(generated_headers:generated/%=%) \
$(arch_inc:arch/$(arch)/%=include/%) \
$(generic_inc:arch/generic/%=include/%))
dirs = $(sort $(dir $(generated_headers)))
### Tools ###
gcc_prefix = $(dir $(shell gcc -print-libgcc-file-name))
tool_cflags = -Wall -nostdinc -Wno-main \
-ffreestanding -fno-pic -fno-stack-protector \
-Igenerated/include -Iarch/$(arch) \
-I$(gcc_prefix)include \
-Iarch/generic $(CFLAGS)
.PRECIOUS: $(addprefix tools/, common.o sed.o make.o)
tools/%.o: tools/%.c tools/common.h
$(CC) $(tool_cflags) -c -o $@ $<
tools/%: tools/%.o tools/common.o
ld -L$(gcc_prefix) -nostdlib -o $@ $^ -lgcc
### Musl ###
default: $(lib_obj)
$(dirs):
mkdir -p $@
generated/include/bits/alltypes.h: arch/$(arch)/bits/alltypes.h.in \
include/alltypes.h.in tools/sed | $(dirs)
cat $(filter %.in, $^) | tools/sed -f tools/mkalltypes.sed >$@
generated/include/bits/syscall.h: arch/$(arch)/bits/syscall.h.in \
tools/sed | $(dirs)
cp $< $@
tools/sed 's/__NR_/SYS_/' < $< >>$@
src/internal/version.o: cflags += -DVERSION=\"$(shell cat VERSION)\"
$(memops_obj): cflags += -fno-tree-loop-distribute-patterns
$(crt_obj): cflags += -DCRT
cc_cmd = $(CC) $(cflags) -c -o $@ $<
as_cmd = $(cc_cmd)
install_cmd = install -D -m 644 $< $@
%.o: %.s
$(as_cmd)
%.o: %.S
$(cc_cmd)
%.o: %.c $(generated_headers) $(implementation_headers)
$(cc_cmd)
crt/crt1.o: crt/crt1.c arch/$(arch)/crt_arch.h $(generated_headers) $(implementation_headers)
$(cc_cmd)
%.o: crt/$(arch)/%.o
cp $< $@
%.o: crt/%.o
cp $< $@
libc.a: $(all_obj)
rm -f $@
$(AR) rcs $@ $^
$(DESTDIR)$(libdir)/%: %
$(install_cmd)
$(DESTDIR)$(includedir)/bits/%: arch/$(arch)/bits/%
$(install_cmd)
$(DESTDIR)$(includedir)/bits/%: arch/generic/bits/%
$(install_cmd)
$(DESTDIR)$(includedir)/bits/%: generated/include/bits/%
$(install_cmd)
$(DESTDIR)$(includedir)/%: include/%
$(install_cmd)
install-libs: $(addprefix $(DESTDIR)$(libdir)/, $(lib_obj))
install-headers: $(all_inc:include/%=$(DESTDIR)$(includedir)/%)
install: install-libs install-headers
musl-1.2.5-mod.tar.gz:
git archive --format=tar.gz --prefix=musl-1.2.5-mod/ -o $@ HEAD
clean:
rm -rf generated
rm -f crt/*.o crt/*/*.o src/*/*.o src/*/*/*.o libc.a crt*.o
rm -f tools/*.o tools/sed tools/make
rm -f musl-*.tar.gz
|
