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/locale_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$(srcdir)/src/include -I$(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
116OPTIMIZE_SRCS = $(wildcard $(OPTIMIZE_GLOBS:%=$(srcdir)/src/%))
117$(OPTIMIZE_SRCS:$(srcdir)/%.c=obj/%.o) $(OPTIMIZE_SRCS:$(srcdir)/%.c=obj/%.lo): CFLAGS += -O3
118
119MEMOPS_OBJS = $(filter %/memcpy.o %/memmove.o %/memcmp.o %/memset.o, $(LIBC_OBJS))
120$(MEMOPS_OBJS) $(MEMOPS_OBJS:%.o=%.lo): CFLAGS_ALL += $(CFLAGS_MEMOPS)
121
122NOSSP_OBJS = $(CRT_OBJS) $(LDSO_OBJS) $(filter \
123	%/__libc_start_main.o %/__init_tls.o %/__stack_chk_fail.o \
124	%/__set_thread_area.o %/memset.o %/memcpy.o \
125	, $(LIBC_OBJS))
126$(NOSSP_OBJS) $(NOSSP_OBJS:%.o=%.lo): CFLAGS_ALL += $(CFLAGS_NOSSP)
127
128$(CRT_OBJS): CFLAGS_ALL += -DCRT
129
130$(LOBJS) $(LDSO_OBJS): CFLAGS_ALL += -fPIC
131
132CC_CMD = $(CC) $(CFLAGS_ALL) -c -o $@ $<
133
134# Choose invocation of assembler to be used
135ifeq ($(ADD_CFI),yes)
136	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 $@ -
137else
138	AS_CMD = $(CC_CMD)
139endif
140
141obj/%.o: $(srcdir)/%.s
142	$(AS_CMD)
143
144obj/%.o: $(srcdir)/%.S
145	$(CC_CMD)
146
147obj/%.o: $(srcdir)/%.c $(GENH) $(IMPH)
148	$(CC_CMD)
149
150obj/%.lo: $(srcdir)/%.s
151	$(AS_CMD)
152
153obj/%.lo: $(srcdir)/%.S
154	$(CC_CMD)
155
156obj/%.lo: $(srcdir)/%.c $(GENH) $(IMPH)
157	$(CC_CMD)
158
159lib/libc.so: $(LOBJS) $(LDSO_OBJS)
160	$(CC) $(CFLAGS_ALL) $(LDFLAGS_ALL) -nostdlib -shared \
161	-Wl,-e,_dlstart -o $@ $(LOBJS) $(LDSO_OBJS) $(LIBCC)
162
163lib/libc.a: $(AOBJS)
164	rm -f $@
165	$(AR) rc $@ $(AOBJS)
166	$(RANLIB) $@
167
168$(EMPTY_LIBS):
169	rm -f $@
170	$(AR) rc $@
171
172lib/%.o: obj/crt/$(ARCH)/%.o
173	cp $< $@
174
175lib/%.o: obj/crt/%.o
176	cp $< $@
177
178lib/musl-gcc.specs: $(srcdir)/tools/musl-gcc.specs.sh config.mak
179	sh $< "$(includedir)" "$(libdir)" "$(LDSO_PATHNAME)" > $@
180
181obj/musl-gcc: config.mak
182	printf '#!/bin/sh\nexec "$${REALGCC:-$(WRAPCC_GCC)}" "$$@" -specs "%s/musl-gcc.specs"\n' "$(libdir)" > $@
183	chmod +x $@
184
185obj/%-clang: $(srcdir)/tools/%-clang.in config.mak
186	sed -e 's!@CC@!$(WRAPCC_CLANG)!g' -e 's!@PREFIX@!$(prefix)!g' -e 's!@INCDIR@!$(includedir)!g' -e 's!@LIBDIR@!$(libdir)!g' -e 's!@LDSO@!$(LDSO_PATHNAME)!g' $< > $@
187	chmod +x $@
188
189$(DESTDIR)$(bindir)/%: obj/%
190	$(INSTALL) -D $< $@
191
192$(DESTDIR)$(libdir)/%.so: lib/%.so
193	$(INSTALL) -D -m 755 $< $@
194
195$(DESTDIR)$(libdir)/%: lib/%
196	$(INSTALL) -D -m 644 $< $@
197
198$(DESTDIR)$(includedir)/bits/%: $(srcdir)/arch/$(ARCH)/bits/%
199	$(INSTALL) -D -m 644 $< $@
200
201$(DESTDIR)$(includedir)/bits/%: $(srcdir)/arch/generic/bits/%
202	$(INSTALL) -D -m 644 $< $@
203
204$(DESTDIR)$(includedir)/bits/%: obj/include/bits/%
205	$(INSTALL) -D -m 644 $< $@
206
207$(DESTDIR)$(includedir)/%: $(srcdir)/include/%
208	$(INSTALL) -D -m 644 $< $@
209
210$(DESTDIR)$(LDSO_PATHNAME): $(DESTDIR)$(libdir)/libc.so
211	$(INSTALL) -D -l $(libdir)/libc.so $@ || true
212
213install-libs: $(ALL_LIBS:lib/%=$(DESTDIR)$(libdir)/%) $(if $(SHARED_LIBS),$(DESTDIR)$(LDSO_PATHNAME),)
214
215install-headers: $(ALL_INCLUDES:include/%=$(DESTDIR)$(includedir)/%)
216
217install-tools: $(ALL_TOOLS:obj/%=$(DESTDIR)$(bindir)/%)
218
219install: install-libs install-headers install-tools
220
221musl-git-%.tar.gz: .git
222	 git --git-dir=$(srcdir)/.git archive --format=tar.gz --prefix=$(patsubst %.tar.gz,%,$@)/ -o $@ $(patsubst musl-git-%.tar.gz,%,$@)
223
224musl-%.tar.gz: .git
225	 git --git-dir=$(srcdir)/.git archive --format=tar.gz --prefix=$(patsubst %.tar.gz,%,$@)/ -o $@ v$(patsubst musl-%.tar.gz,%,$@)
226
227endif
228
229clean:
230	rm -rf obj lib
231
232distclean: clean
233	rm -f config.mak
234
235.PHONY: all clean install install-libs install-headers install-tools
236