Makefile - platform/external/musl - Gitiles

 #
 # 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 =
 LDFLAGS_AUTO =
 LIBCC = -lgcc
 CPPFLAGS =
 CFLAGS =
 CFLAGS_AUTO = -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_AUTO) $(CFLAGS)
 CFLAGS_ALL_STATIC = $(CFLAGS_ALL)
 CFLAGS_ALL_SHARED = $(CFLAGS_ALL) -fPIC -DSHARED

 LDFLAGS_ALL = $(LDFLAGS_AUTO) $(LDFLAGS)

 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/rcrt1.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

 WRAPCC_GCC = gcc
 WRAPCC_CLANG = clang

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

 crt/rcrt1.o src/ldso/dlstart.lo src/ldso/dynlink.lo: src/internal/dynlink.h arch/$(ARCH)/reloc.h

 crt/crt1.o crt/Scrt1.o crt/rcrt1.o src/ldso/dlstart.lo: $(wildcard arch/$(ARCH)/crt_arch.h)

 crt/rcrt1.o: src/ldso/dlstart.c

 crt/Scrt1.o crt/rcrt1.o: CFLAGS_ALL += -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_ALL += $(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_ALL += $(CFLAGS_NOSSP)

 $(CRT_LIBS:lib/%=crt/%): CFLAGS_ALL += -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))))

 # Choose invocation of assembler to be used
 # $(1) is input file, $(2) is output file, $(3) is assembler flags
 ifeq ($(ADD_CFI),yes)
 	AS_CMD = LC_ALL=C awk -f tools/add-cfi.common.awk -f tools/add-cfi.$(ARCH).awk $< | $(CC) -x assembler -c -o $@ -
 else
 	AS_CMD = $(CC) -c -o $@ $<
 endif

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

 %.o: $(ARCH)/%.s
 	$(AS_CMD) $(CFLAGS_ALL_STATIC)

 %.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
 	$(AS_CMD) $(CFLAGS_ALL_SHARED)

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

 lib/libc.so: $(LOBJS)
 	$(CC) $(CFLAGS_ALL_SHARED) $(LDFLAGS_ALL) -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 "$${REALGCC:-$(WRAPCC_GCC)}" "$$@" -specs "%s/musl-gcc.specs"\n' "$(libdir)" > $@
 	chmod +x $@

 tools/%-clang: tools/%-clang.in config.mak
 	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' $< > $@
 	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,%,$@)

 .PHONY: all clean install install-libs install-headers install-tools
	#
	# 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 =
	LDFLAGS_AUTO =
	LIBCC = -lgcc
	CPPFLAGS =
	CFLAGS =
	CFLAGS_AUTO = -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_AUTO) $(CFLAGS)
	CFLAGS_ALL_STATIC = $(CFLAGS_ALL)
	CFLAGS_ALL_SHARED = $(CFLAGS_ALL) -fPIC -DSHARED

	LDFLAGS_ALL = $(LDFLAGS_AUTO) $(LDFLAGS)

	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/rcrt1.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

	WRAPCC_GCC = gcc
	WRAPCC_CLANG = clang

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

	crt/rcrt1.o src/ldso/dlstart.lo src/ldso/dynlink.lo: src/internal/dynlink.h arch/$(ARCH)/reloc.h

	crt/crt1.o crt/Scrt1.o crt/rcrt1.o src/ldso/dlstart.lo: $(wildcard arch/$(ARCH)/crt_arch.h)

	crt/rcrt1.o: src/ldso/dlstart.c

	crt/Scrt1.o crt/rcrt1.o: CFLAGS_ALL += -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_ALL += $(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_ALL += $(CFLAGS_NOSSP)

	$(CRT_LIBS:lib/%=crt/%): CFLAGS_ALL += -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))))

	# Choose invocation of assembler to be used
	# $(1) is input file, $(2) is output file, $(3) is assembler flags
	ifeq ($(ADD_CFI),yes)
	AS_CMD = LC_ALL=C awk -f tools/add-cfi.common.awk -f tools/add-cfi.$(ARCH).awk $< \| $(CC) -x assembler -c -o $@ -
	else
	AS_CMD = $(CC) -c -o $@ $<
	endif

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

	%.o: $(ARCH)/%.s
	$(AS_CMD) $(CFLAGS_ALL_STATIC)

	%.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
	$(AS_CMD) $(CFLAGS_ALL_SHARED)

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

	lib/libc.so: $(LOBJS)
	$(CC) $(CFLAGS_ALL_SHARED) $(LDFLAGS_ALL) -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 "$${REALGCC:-$(WRAPCC_GCC)}" "$$@" -specs "%s/musl-gcc.specs"\n' "$(libdir)" > $@
	chmod +x $@

	tools/%-clang: tools/%-clang.in config.mak
	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' $< > $@
	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,%,$@)

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