summaryrefslogtreecommitdiff
path: root/Makefile
blob: 6559295e3f3e6e88e46d59ac5dd836509060d701 (plain) (blame)
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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
#
# Makefile for musl (requires GNU make)
#
# This is how simple every makefile should be...
# No, I take that back - actually most should be less than half this size.
#
# Use config.mak to override any of the following variables.
# Do not make changes here.
#

exec_prefix = /usr/local
bindir = $(exec_prefix)/bin

prefix = /usr/local/musl
includedir = $(prefix)/include
libdir = $(prefix)/lib
syslibdir = /lib

SRCS = $(sort $(wildcard src/*/*.c arch/$(ARCH)/src/*.c))
OBJS = $(SRCS:.c=.o)
LOBJS = $(OBJS:.o=.lo)
GENH = include/bits/alltypes.h
GENH_INT = src/internal/version.h
IMPH = src/internal/stdio_impl.h src/internal/pthread_impl.h src/internal/libc.h

LDFLAGS = 
LIBCC = -lgcc
CPPFLAGS =
CFLAGS = -Os -pipe
CFLAGS_C99FSE = -std=c99 -ffreestanding -nostdinc 

CFLAGS_ALL = $(CFLAGS_C99FSE)
CFLAGS_ALL += -D_XOPEN_SOURCE=700 -I./arch/$(ARCH) -I./src/internal -I./include
CFLAGS_ALL += $(CPPFLAGS) $(CFLAGS)
CFLAGS_ALL_STATIC = $(CFLAGS_ALL)
CFLAGS_ALL_SHARED = $(CFLAGS_ALL) -fPIC -DSHARED

AR      = $(CROSS_COMPILE)ar
RANLIB  = $(CROSS_COMPILE)ranlib
INSTALL = ./tools/install.sh

ARCH_INCLUDES = $(wildcard arch/$(ARCH)/bits/*.h)
ALL_INCLUDES = $(sort $(wildcard include/*.h include/*/*.h) $(GENH) $(ARCH_INCLUDES:arch/$(ARCH)/%=include/%))

EMPTY_LIB_NAMES = m rt pthread crypt util xnet resolv dl
EMPTY_LIBS = $(EMPTY_LIB_NAMES:%=lib/lib%.a)
CRT_LIBS = lib/crt1.o lib/Scrt1.o lib/crti.o lib/crtn.o
STATIC_LIBS = lib/libc.a
SHARED_LIBS = lib/libc.so
TOOL_LIBS = lib/musl-gcc.specs
ALL_LIBS = $(CRT_LIBS) $(STATIC_LIBS) $(SHARED_LIBS) $(EMPTY_LIBS) $(TOOL_LIBS)
ALL_TOOLS = tools/musl-gcc

LDSO_PATHNAME = $(syslibdir)/ld-musl-$(ARCH)$(SUBARCH).so.1

-include config.mak

all: $(ALL_LIBS) $(ALL_TOOLS)

install: install-libs install-headers install-tools

clean:
	rm -f crt/*.o
	rm -f $(OBJS)
	rm -f $(LOBJS)
	rm -f $(ALL_LIBS) lib/*.[ao] lib/*.so
	rm -f $(ALL_TOOLS)
	rm -f $(GENH) $(GENH_INT)
	rm -f include/bits

distclean: clean
	rm -f config.mak

include/bits:
	@test "$(ARCH)" || { echo "Please set ARCH in config.mak before running make." ; exit 1 ; }
	ln -sf ../arch/$(ARCH)/bits $@

include/bits/alltypes.h.in: include/bits

include/bits/alltypes.h: include/bits/alltypes.h.in include/alltypes.h.in tools/mkalltypes.sed
	sed -f tools/mkalltypes.sed include/bits/alltypes.h.in include/alltypes.h.in > $@

src/internal/version.h: $(wildcard VERSION .git)
	printf '#define VERSION "%s"\n' "$$(sh tools/version.sh)" > $@

src/internal/version.lo: src/internal/version.h

src/ldso/dlstart.lo src/ldso/dynlink.lo: src/internal/dynlink.h arch/$(ARCH)/reloc.h

crt/crt1.o crt/Scrt1.o src/ldso/dlstart.lo: $(wildcard arch/$(ARCH)/crt_arch.h)

crt/Scrt1.o: CFLAGS += -fPIC

OPTIMIZE_SRCS = $(wildcard $(OPTIMIZE_GLOBS:%=src/%))
$(OPTIMIZE_SRCS:%.c=%.o) $(OPTIMIZE_SRCS:%.c=%.lo): CFLAGS += -O3

MEMOPS_SRCS = src/string/memcpy.c src/string/memmove.c src/string/memcmp.c src/string/memset.c
$(MEMOPS_SRCS:%.c=%.o) $(MEMOPS_SRCS:%.c=%.lo): CFLAGS += $(CFLAGS_MEMOPS)

NOSSP_SRCS = $(wildcard crt/*.c) \
	src/env/__libc_start_main.c src/env/__init_tls.c \
	src/thread/__set_thread_area.c src/env/__stack_chk_fail.c \
	src/string/memset.c src/string/memcpy.c \
	src/ldso/dlstart.c src/ldso/dynlink.c
$(NOSSP_SRCS:%.c=%.o) $(NOSSP_SRCS:%.c=%.lo): CFLAGS += $(CFLAGS_NOSSP)

$(CRT_LIBS): CFLAGS += -DCRT

# This incantation ensures that changes to any subarch asm files will
# force the corresponding object file to be rebuilt, even if the implicit
# rule below goes indirectly through a .sub file.
define mkasmdep
$(dir $(patsubst %/,%,$(dir $(1))))$(notdir $(1:.s=.o)): $(1)
endef
$(foreach s,$(wildcard src/*/$(ARCH)*/*.s),$(eval $(call mkasmdep,$(s))))

%.o: $(ARCH)$(ASMSUBARCH)/%.sub
	$(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $(dir $<)$(shell cat $<)

%.o: $(ARCH)/%.s
	$(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $<

%.o: %.c $(GENH) $(IMPH)
	$(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $<

%.lo: $(ARCH)$(ASMSUBARCH)/%.sub
	$(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $(dir $<)$(shell cat $<)

%.lo: $(ARCH)/%.s
	$(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $<

%.lo: %.c $(GENH) $(IMPH)
	$(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $<

lib/libc.so: $(LOBJS)
	$(CC) $(CFLAGS_ALL_SHARED) $(LDFLAGS) -nostdlib -shared \
	-Wl,-e,_dlstart -Wl,-Bsymbolic-functions \
	-o $@ $(LOBJS) $(LIBCC)

lib/libc.a: $(OBJS)
	rm -f $@
	$(AR) rc $@ $(OBJS)
	$(RANLIB) $@

$(EMPTY_LIBS):
	rm -f $@
	$(AR) rc $@

lib/%.o: crt/%.o
	cp $< $@

lib/musl-gcc.specs: tools/musl-gcc.specs.sh config.mak
	sh $< "$(includedir)" "$(libdir)" "$(LDSO_PATHNAME)" > $@

tools/musl-gcc: config.mak
	printf '#!/bin/sh\nexec "$${REALGCC:-gcc}" "$$@" -specs "%s/musl-gcc.specs"\n' "$(libdir)" > $@
	chmod +x $@

$(DESTDIR)$(bindir)/%: tools/%
	$(INSTALL) -D $< $@

$(DESTDIR)$(libdir)/%.so: lib/%.so
	$(INSTALL) -D -m 755 $< $@

$(DESTDIR)$(libdir)/%: lib/%
	$(INSTALL) -D -m 644 $< $@

$(DESTDIR)$(includedir)/bits/%: arch/$(ARCH)/bits/%
	$(INSTALL) -D -m 644 $< $@

$(DESTDIR)$(includedir)/%: include/%
	$(INSTALL) -D -m 644 $< $@

$(DESTDIR)$(LDSO_PATHNAME): $(DESTDIR)$(libdir)/libc.so
	$(INSTALL) -D -l $(libdir)/libc.so $@ || true

install-libs: $(ALL_LIBS:lib/%=$(DESTDIR)$(libdir)/%) $(if $(SHARED_LIBS),$(DESTDIR)$(LDSO_PATHNAME),)

install-headers: $(ALL_INCLUDES:include/%=$(DESTDIR)$(includedir)/%)

install-tools: $(ALL_TOOLS:tools/%=$(DESTDIR)$(bindir)/%)

musl-git-%.tar.gz: .git
	 git archive --format=tar.gz --prefix=$(patsubst %.tar.gz,%,$@)/ -o $@ $(patsubst musl-git-%.tar.gz,%,$@)

musl-%.tar.gz: .git
	 git archive --format=tar.gz --prefix=$(patsubst %.tar.gz,%,$@)/ -o $@ v$(patsubst musl-%.tar.gz,%,$@)

.PRECIOUS: $(CRT_LIBS:lib/%=crt/%)

.PHONY: all clean install install-libs install-headers install-tools