mirror of
git://git.musl-libc.org/musl
synced 2024-12-16 11:45:13 +00:00
82fa6b43b3
ln -sf is non-atomic; it unlinks the destination first. instead, make a temporary link and rename it into place. this commit also fixes some of the dependency tracking behavior for the link. depending on the directory it's to be installed in is not reasonable; it causes a new link to be attempted if the library directory has been modified, but does not attempt to make a new link just because libc has been updated. instead, depend on the target to be linked to. this will ensure that, if prefix has changed but syslibdir has not, the link will be updated to point to the new prefix.
173 lines
4.8 KiB
Makefile
173 lines
4.8 KiB
Makefile
#
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# Makefile for musl (requires GNU make)
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#
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# This is how simple every makefile should be...
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# No, I take that back - actually most should be less than half this size.
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#
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# Use config.mak to override any of the following variables.
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# Do not make changes here.
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#
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exec_prefix = /usr/local
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bindir = $(exec_prefix)/bin
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prefix = /usr/local/musl
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includedir = $(prefix)/include
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libdir = $(prefix)/lib
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syslibdir = /lib
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SRCS = $(sort $(wildcard src/*/*.c arch/$(ARCH)/src/*.c))
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OBJS = $(SRCS:.c=.o)
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LOBJS = $(OBJS:.o=.lo)
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GENH = include/bits/alltypes.h
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IMPH = src/internal/stdio_impl.h src/internal/pthread_impl.h src/internal/libc.h
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LDFLAGS =
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LIBCC = -lgcc
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CPPFLAGS =
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CFLAGS = -Os -pipe
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CFLAGS_C99FSE = -std=c99 -ffreestanding -nostdinc
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CFLAGS_ALL = $(CFLAGS_C99FSE)
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CFLAGS_ALL += -D_XOPEN_SOURCE=700 -I./arch/$(ARCH) -I./src/internal -I./include
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CFLAGS_ALL += $(CPPFLAGS) $(CFLAGS)
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CFLAGS_ALL_STATIC = $(CFLAGS_ALL)
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CFLAGS_ALL_SHARED = $(CFLAGS_ALL) -fPIC -DSHARED
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AR = $(CROSS_COMPILE)ar
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RANLIB = $(CROSS_COMPILE)ranlib
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ARCH_INCLUDES = $(wildcard arch/$(ARCH)/bits/*.h)
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ALL_INCLUDES = $(sort $(wildcard include/*.h include/*/*.h) $(GENH) $(ARCH_INCLUDES:arch/$(ARCH)/%=include/%))
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EMPTY_LIB_NAMES = m rt pthread crypt util xnet resolv dl
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EMPTY_LIBS = $(EMPTY_LIB_NAMES:%=lib/lib%.a)
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CRT_LIBS = lib/crt1.o lib/Scrt1.o lib/crti.o lib/crtn.o
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STATIC_LIBS = lib/libc.a
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SHARED_LIBS = lib/libc.so
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TOOL_LIBS = lib/musl-gcc.specs
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ALL_LIBS = $(CRT_LIBS) $(STATIC_LIBS) $(SHARED_LIBS) $(EMPTY_LIBS) $(TOOL_LIBS)
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ALL_TOOLS = tools/musl-gcc
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LDSO_PATHNAME = $(syslibdir)/ld-musl-$(ARCH)$(SUBARCH).so.1
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-include config.mak
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all: $(ALL_LIBS) $(ALL_TOOLS)
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install: install-libs install-headers install-tools
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clean:
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rm -f crt/*.o
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rm -f $(OBJS)
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rm -f $(LOBJS)
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rm -f $(ALL_LIBS) lib/*.[ao] lib/*.so
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rm -f $(ALL_TOOLS)
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rm -f $(GENH)
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rm -f include/bits
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distclean: clean
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rm -f config.mak
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include/bits:
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@test "$(ARCH)" || { echo "Please set ARCH in config.mak before running make." ; exit 1 ; }
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ln -sf ../arch/$(ARCH)/bits $@
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include/bits/alltypes.h.in: include/bits
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include/bits/alltypes.h: include/bits/alltypes.h.in include/alltypes.h.in tools/mkalltypes.sed
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sed -f tools/mkalltypes.sed include/bits/alltypes.h.in include/alltypes.h.in > $@
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src/ldso/dynlink.lo: arch/$(ARCH)/reloc.h
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crt/crt1.o crt/Scrt1.o: $(wildcard arch/$(ARCH)/crt_arch.h)
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crt/Scrt1.o: CFLAGS += -fPIC
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OPTIMIZE_SRCS = $(wildcard $(OPTIMIZE_GLOBS:%=src/%))
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$(OPTIMIZE_SRCS:%.c=%.o) $(OPTIMIZE_SRCS:%.c=%.lo): CFLAGS += -O3
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MEMOPS_SRCS = src/string/memcpy.c src/string/memmove.c src/string/memcmp.c src/string/memset.c
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$(MEMOPS_SRCS:%.c=%.o) $(MEMOPS_SRCS:%.c=%.lo): CFLAGS += $(CFLAGS_MEMOPS)
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# This incantation ensures that changes to any subarch asm files will
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# force the corresponding object file to be rebuilt, even if the implicit
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# rule below goes indirectly through a .sub file.
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define mkasmdep
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$(dir $(patsubst %/,%,$(dir $(1))))$(notdir $(1:.s=.o)): $(1)
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endef
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$(foreach s,$(wildcard src/*/$(ARCH)*/*.s),$(eval $(call mkasmdep,$(s))))
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%.o: $(ARCH)$(ASMSUBARCH)/%.sub
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$(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $(dir $<)$(shell cat $<)
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%.o: $(ARCH)/%.s
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$(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $<
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%.o: %.c $(GENH) $(IMPH)
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$(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $<
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%.lo: $(ARCH)$(ASMSUBARCH)/%.sub
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$(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $(dir $<)$(shell cat $<)
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%.lo: $(ARCH)/%.s
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$(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $<
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%.lo: %.c $(GENH) $(IMPH)
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$(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $<
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lib/libc.so: $(LOBJS)
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$(CC) $(CFLAGS_ALL_SHARED) $(LDFLAGS) -nostdlib -shared \
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-Wl,-e,_start -Wl,-Bsymbolic-functions \
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-o $@ $(LOBJS) $(LIBCC)
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lib/libc.a: $(OBJS)
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rm -f $@
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$(AR) rc $@ $(OBJS)
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$(RANLIB) $@
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$(EMPTY_LIBS):
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rm -f $@
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$(AR) rc $@
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lib/%.o: crt/%.o
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cp $< $@
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lib/musl-gcc.specs: tools/musl-gcc.specs.sh config.mak
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sh $< "$(includedir)" "$(libdir)" "$(LDSO_PATHNAME)" > $@
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tools/musl-gcc: config.mak
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printf '#!/bin/sh\nexec "$${REALGCC:-gcc}" "$$@" -specs "%s/musl-gcc.specs"\n' "$(libdir)" > $@
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chmod +x $@
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$(DESTDIR)$(bindir)/%: tools/%
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install -D $< $@
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$(DESTDIR)$(libdir)/%.so: lib/%.so
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install -D -m 755 $< $@
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$(DESTDIR)$(libdir)/%: lib/%
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install -D -m 644 $< $@
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$(DESTDIR)$(includedir)/bits/%: arch/$(ARCH)/bits/%
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install -D -m 644 $< $@
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$(DESTDIR)$(includedir)/%: include/%
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install -D -m 644 $< $@
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$(DESTDIR)$(LDSO_PATHNAME): $(DESTDIR)$(libdir)/libc.so
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test -d $(DESTDIR)$(syslibdir) || install -d -m 755 $(DESTDIR)$(syslibdir) || true
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{ ln -sf $(libdir)/libc.so $@.tmp.$$$$ && mv -f $@.tmp.$$$$ $@ ; } || true
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install-libs: $(ALL_LIBS:lib/%=$(DESTDIR)$(libdir)/%) $(if $(SHARED_LIBS),$(DESTDIR)$(LDSO_PATHNAME),)
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install-headers: $(ALL_INCLUDES:include/%=$(DESTDIR)$(includedir)/%)
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install-tools: $(ALL_TOOLS:tools/%=$(DESTDIR)$(bindir)/%)
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.PRECIOUS: $(CRT_LIBS:lib/%=crt/%)
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.PHONY: all clean install install-libs install-headers install-tools
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