1#
2# Makefile for musl (requires GNU make)
3#
4# This is how simple every makefile should be...
5# No, I take that back - actually most should be less than half this size.
6#
7# Use config.mak to override any of the following variables.
8# Do not make changes here.
9#
10
11srcdir = .
12exec_prefix = /usr/local
13bindir = $(exec_prefix)/bin
14
15prefix = /usr/local/musl
16includedir = $(prefix)/include
17libdir = $(prefix)/lib
18syslibdir = /lib
19
20SRC_DIRS = $(addprefix $(srcdir)/,src/* crt ldso)
21BASE_GLOBS = $(addsuffix /*.c,$(SRC_DIRS))
22ARCH_GLOBS = $(addsuffix /$(ARCH)/*.[csS],$(SRC_DIRS))
23BASE_SRCS = $(sort $(wildcard $(BASE_GLOBS)))
24ARCH_SRCS = $(sort $(wildcard $(ARCH_GLOBS)))
25BASE_OBJS = $(patsubst $(srcdir)/%,%.o,$(basename $(BASE_SRCS)))
26ARCH_OBJS = $(patsubst $(srcdir)/%,%.o,$(basename $(ARCH_SRCS)))
27REPLACED_OBJS = $(sort $(subst /$(ARCH)/,/,$(ARCH_OBJS)))
28ALL_OBJS = $(addprefix obj/, $(filter-out $(REPLACED_OBJS), $(sort $(BASE_OBJS) $(ARCH_OBJS))))
29
30LIBC_OBJS = $(filter obj/src/%,$(ALL_OBJS))
31LDSO_OBJS = $(filter obj/ldso/%,$(ALL_OBJS:%.o=%.lo))
32CRT_OBJS = $(filter obj/crt/%,$(ALL_OBJS))
33
34AOBJS = $(LIBC_OBJS)
35LOBJS = $(LIBC_OBJS:.o=.lo)
36GENH = obj/include/bits/alltypes.h obj/include/bits/syscall.h
37GENH_INT = obj/src/internal/version.h
38IMPH = $(addprefix $(srcdir)/, src/internal/stdio_impl.h src/internal/pthread_impl.h src/internal/libc.h)
39
40LDFLAGS =
41LDFLAGS_AUTO =
42LIBCC = -lgcc
43CPPFLAGS =
44CFLAGS =
45CFLAGS_AUTO = -Os -pipe
46CFLAGS_C99FSE = -std=c99 -ffreestanding -nostdinc 
47
48CFLAGS_ALL = $(CFLAGS_C99FSE)
49CFLAGS_ALL += -D_XOPEN_SOURCE=700 -I$(srcdir)/arch/$(ARCH) -I$(srcdir)/arch/generic -Iobj/src/internal -I$(srcdir)/src/internal -Iobj/include -I$(srcdir)/include
50CFLAGS_ALL += $(CPPFLAGS) $(CFLAGS_AUTO) $(CFLAGS)
51
52LDFLAGS_ALL = $(LDFLAGS_AUTO) $(LDFLAGS)
53
54AR      = $(CROSS_COMPILE)ar
55RANLIB  = $(CROSS_COMPILE)ranlib
56INSTALL = $(srcdir)/tools/install.sh
57
58ARCH_INCLUDES = $(wildcard $(srcdir)/arch/$(ARCH)/bits/*.h)
59GENERIC_INCLUDES = $(wildcard $(srcdir)/arch/generic/bits/*.h)
60INCLUDES = $(wildcard $(srcdir)/include/*.h $(srcdir)/include/*/*.h)
61ALL_INCLUDES = $(sort $(INCLUDES:$(srcdir)/%=%) $(GENH:obj/%=%) $(ARCH_INCLUDES:$(srcdir)/arch/$(ARCH)/%=include/%) $(GENERIC_INCLUDES:$(srcdir)/arch/generic/%=include/%))
62
63EMPTY_LIB_NAMES = m rt pthread crypt util xnet resolv dl
64EMPTY_LIBS = $(EMPTY_LIB_NAMES:%=lib/lib%.a)
65CRT_LIBS = $(addprefix lib/,$(notdir $(CRT_OBJS)))
66STATIC_LIBS = lib/libc.a
67SHARED_LIBS = lib/libc.so
68TOOL_LIBS = lib/musl-gcc.specs
69ALL_LIBS = $(CRT_LIBS) $(STATIC_LIBS) $(SHARED_LIBS) $(EMPTY_LIBS) $(TOOL_LIBS)
70ALL_TOOLS = obj/musl-gcc
71
72WRAPCC_GCC = gcc
73WRAPCC_CLANG = clang
74
75LDSO_PATHNAME = $(syslibdir)/ld-musl-$(ARCH)$(SUBARCH).so.1
76
77-include config.mak
78
79ifeq ($(ARCH),)
80
81all:
82	@echo "Please set ARCH in config.mak before running make."
83	@exit 1
84
85else
86
87all: $(ALL_LIBS) $(ALL_TOOLS)
88
89OBJ_DIRS = $(sort $(patsubst %/,%,$(dir $(ALL_LIBS) $(ALL_TOOLS) $(ALL_OBJS) $(GENH) $(GENH_INT))) obj/include)
90
91$(ALL_LIBS) $(ALL_TOOLS) $(ALL_OBJS) $(ALL_OBJS:%.o=%.lo) $(GENH) $(GENH_INT): | $(OBJ_DIRS)
92
93$(OBJ_DIRS):
94	mkdir -p $@
95
96obj/include/bits/alltypes.h: $(srcdir)/arch/$(ARCH)/bits/alltypes.h.in $(srcdir)/include/alltypes.h.in $(srcdir)/tools/mkalltypes.sed
97	sed -f $(srcdir)/tools/mkalltypes.sed $(srcdir)/arch/$(ARCH)/bits/alltypes.h.in $(srcdir)/include/alltypes.h.in > $@
98
99obj/include/bits/syscall.h: $(srcdir)/arch/$(ARCH)/bits/syscall.h.in
100	cp $< $@
101	sed -n -e s/__NR_/SYS_/p < $< >> $@
102
103obj/src/internal/version.h: $(wildcard $(srcdir)/VERSION $(srcdir)/.git)
104	printf '#define VERSION "%s"\n' "$$(cd $(srcdir); sh tools/version.sh)" > $@
105
106obj/src/internal/version.o obj/src/internal/version.lo: obj/src/internal/version.h
107
108obj/crt/rcrt1.o obj/ldso/dlstart.lo obj/ldso/dynlink.lo: $(srcdir)/src/internal/dynlink.h $(srcdir)/arch/$(ARCH)/reloc.h
109
110obj/crt/crt1.o obj/crt/scrt1.o obj/crt/rcrt1.o obj/ldso/dlstart.lo: $(srcdir)/arch/$(ARCH)/crt_arch.h
111
112obj/crt/rcrt1.o: $(srcdir)/ldso/dlstart.c
113
114obj/crt/Scrt1.o obj/crt/rcrt1.o: CFLAGS_ALL += -fPIC
115
116obj/crt/$(ARCH)/crti.o: $(srcdir)/crt/$(ARCH)/crti.s
117
118obj/crt/$(ARCH)/crtn.o: $(srcdir)/crt/$(ARCH)/crtn.s
119
120OPTIMIZE_SRCS = $(wildcard $(OPTIMIZE_GLOBS:%=$(srcdir)/src/%))
121$(OPTIMIZE_SRCS:$(srcdir)/%.c=obj/%.o) $(OPTIMIZE_SRCS:$(srcdir)/%.c=obj/%.lo): CFLAGS += -O3
122
123MEMOPS_SRCS = src/string/memcpy.c src/string/memmove.c src/string/memcmp.c src/string/memset.c
124$(MEMOPS_SRCS:%.c=obj/%.o) $(MEMOPS_SRCS:%.c=obj/%.lo): CFLAGS_ALL += $(CFLAGS_MEMOPS)
125
126NOSSP_SRCS = $(wildcard crt/*.c) \
127	src/env/__libc_start_main.c src/env/__init_tls.c \
128	src/env/__stack_chk_fail.c \
129	src/thread/__set_thread_area.c src/thread/$(ARCH)/__set_thread_area.c \
130	src/string/memset.c src/string/$(ARCH)/memset.c \
131	src/string/memcpy.c src/string/$(ARCH)/memcpy.c \
132	ldso/dlstart.c ldso/dynlink.c
133$(NOSSP_SRCS:%.c=obj/%.o) $(NOSSP_SRCS:%.c=obj/%.lo): CFLAGS_ALL += $(CFLAGS_NOSSP)
134
135$(CRT_OBJS): CFLAGS_ALL += -DCRT
136
137$(LOBJS) $(LDSO_OBJS): CFLAGS_ALL += -fPIC
138
139CC_CMD = $(CC) $(CFLAGS_ALL) -c -o $@ $<
140
141# Choose invocation of assembler to be used
142ifeq ($(ADD_CFI),yes)
143	AS_CMD = LC_ALL=C awk -f $(srcdir)/tools/add-cfi.common.awk -f $(srcdir)/tools/add-cfi.$(ARCH).awk $< | $(CC) $(CFLAGS_ALL) -x assembler -c -o $@ -
144else
145	AS_CMD = $(CC_CMD)
146endif
147
148obj/%.o: $(srcdir)/%.s
149	$(AS_CMD)
150
151obj/%.o: $(srcdir)/%.S
152	$(CC_CMD)
153
154obj/%.o: $(srcdir)/%.c $(GENH) $(IMPH)
155	$(CC_CMD)
156
157obj/%.lo: $(srcdir)/%.s
158	$(AS_CMD)
159
160obj/%.lo: $(srcdir)/%.S
161	$(CC_CMD)
162
163obj/%.lo: $(srcdir)/%.c $(GENH) $(IMPH)
164	$(CC_CMD)
165
166lib/libc.so: $(LOBJS) $(LDSO_OBJS)
167	$(CC) $(CFLAGS_ALL) $(LDFLAGS_ALL) -nostdlib -shared \
168	-Wl,-e,_dlstart -o $@ $(LOBJS) $(LDSO_OBJS) $(LIBCC)
169
170lib/libc.a: $(AOBJS)
171	rm -f $@
172	$(AR) rc $@ $(AOBJS)
173	$(RANLIB) $@
174
175$(EMPTY_LIBS):
176	rm -f $@
177	$(AR) rc $@
178
179lib/%.o: obj/crt/$(ARCH)/%.o
180	cp $< $@
181
182lib/%.o: obj/crt/%.o
183	cp $< $@
184
185lib/musl-gcc.specs: $(srcdir)/tools/musl-gcc.specs.sh config.mak
186	sh $< "$(includedir)" "$(libdir)" "$(LDSO_PATHNAME)" > $@
187
188obj/musl-gcc: config.mak
189	printf '#!/bin/sh\nexec "$${REALGCC:-$(WRAPCC_GCC)}" "$$@" -specs "%s/musl-gcc.specs"\n' "$(libdir)" > $@
190	chmod +x $@
191
192obj/%-clang: $(srcdir)/tools/%-clang.in config.mak
193	sed -e 's!@CC@!$(WRAPCC_CLANG)!g' -e 's!@PREFIX@!$(prefix)!g' -e 's!@INCDIR@!$(includedir)!g' -e 's!@LIBDIR@!$(libdir)!g' -e 's!@LDSO@!$(LDSO_PATHNAME)!g' $< > $@
194	chmod +x $@
195
196$(DESTDIR)$(bindir)/%: obj/%
197	$(INSTALL) -D $< $@
198
199$(DESTDIR)$(libdir)/%.so: lib/%.so
200	$(INSTALL) -D -m 755 $< $@
201
202$(DESTDIR)$(libdir)/%: lib/%
203	$(INSTALL) -D -m 644 $< $@
204
205$(DESTDIR)$(includedir)/bits/%: $(srcdir)/arch/$(ARCH)/bits/%
206	$(INSTALL) -D -m 644 $< $@
207
208$(DESTDIR)$(includedir)/bits/%: $(srcdir)/arch/generic/bits/%
209	$(INSTALL) -D -m 644 $< $@
210
211$(DESTDIR)$(includedir)/bits/%: obj/include/bits/%
212	$(INSTALL) -D -m 644 $< $@
213
214$(DESTDIR)$(includedir)/%: $(srcdir)/include/%
215	$(INSTALL) -D -m 644 $< $@
216
217$(DESTDIR)$(LDSO_PATHNAME): $(DESTDIR)$(libdir)/libc.so
218	$(INSTALL) -D -l $(libdir)/libc.so $@ || true
219
220install-libs: $(ALL_LIBS:lib/%=$(DESTDIR)$(libdir)/%) $(if $(SHARED_LIBS),$(DESTDIR)$(LDSO_PATHNAME),)
221
222install-headers: $(ALL_INCLUDES:include/%=$(DESTDIR)$(includedir)/%)
223
224install-tools: $(ALL_TOOLS:obj/%=$(DESTDIR)$(bindir)/%)
225
226install: install-libs install-headers install-tools
227
228musl-git-%.tar.gz: .git
229	 git --git-dir=$(srcdir)/.git archive --format=tar.gz --prefix=$(patsubst %.tar.gz,%,$@)/ -o $@ $(patsubst musl-git-%.tar.gz,%,$@)
230
231musl-%.tar.gz: .git
232	 git --git-dir=$(srcdir)/.git archive --format=tar.gz --prefix=$(patsubst %.tar.gz,%,$@)/ -o $@ v$(patsubst musl-%.tar.gz,%,$@)
233
234endif
235
236clean:
237	rm -rf obj lib
238
239distclean: clean
240	rm -f config.mak
241
242.PHONY: all clean install install-libs install-headers install-tools
243