mirror of
git://git.musl-libc.org/musl
synced 2024-12-15 11:15:07 +00:00
13d1afa46f
commits leading up to this one have moved the vast majority of libc-internal interface declarations to appropriate internal headers, allowing them to be type-checked and setting the stage to limit their visibility. the ones that have not yet been moved are mostly namespace-protected aliases for standard/public interfaces, which exist to facilitate implementing plain C functions in terms of POSIX functionality, or C or POSIX functionality in terms of extensions that are not standardized. some don't quite fit this description, but are "internally public" interfacs between subsystems of libc. rather than create a number of newly-named headers to declare these functions, and having to add explicit include directives for them to every source file where they're needed, I have introduced a method of wrapping the corresponding public headers. parallel to the public headers in $(srcdir)/include, we now have wrappers in $(srcdir)/src/include that come earlier in the include path order. they include the public header they're wrapping, then add declarations for namespace-protected versions of the same interfaces and any "internally public" interfaces for the subsystem they correspond to. along these lines, the wrapper for features.h is now responsible for the definition of the hidden, weak, and weak_alias macros. this means source files will no longer need to include any special headers to access these features. over time, it is my expectation that the scope of what is "internally public" will expand, reducing the number of source files which need to include *_impl.h and related headers down to those which are actually implementing the corresponding subsystems, not just using them.
236 lines
7.2 KiB
Makefile
236 lines
7.2 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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srcdir = .
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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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SRC_DIRS = $(addprefix $(srcdir)/,src/* crt ldso)
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BASE_GLOBS = $(addsuffix /*.c,$(SRC_DIRS))
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ARCH_GLOBS = $(addsuffix /$(ARCH)/*.[csS],$(SRC_DIRS))
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BASE_SRCS = $(sort $(wildcard $(BASE_GLOBS)))
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ARCH_SRCS = $(sort $(wildcard $(ARCH_GLOBS)))
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BASE_OBJS = $(patsubst $(srcdir)/%,%.o,$(basename $(BASE_SRCS)))
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ARCH_OBJS = $(patsubst $(srcdir)/%,%.o,$(basename $(ARCH_SRCS)))
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REPLACED_OBJS = $(sort $(subst /$(ARCH)/,/,$(ARCH_OBJS)))
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ALL_OBJS = $(addprefix obj/, $(filter-out $(REPLACED_OBJS), $(sort $(BASE_OBJS) $(ARCH_OBJS))))
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LIBC_OBJS = $(filter obj/src/%,$(ALL_OBJS))
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LDSO_OBJS = $(filter obj/ldso/%,$(ALL_OBJS:%.o=%.lo))
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CRT_OBJS = $(filter obj/crt/%,$(ALL_OBJS))
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AOBJS = $(LIBC_OBJS)
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LOBJS = $(LIBC_OBJS:.o=.lo)
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GENH = obj/include/bits/alltypes.h obj/include/bits/syscall.h
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GENH_INT = obj/src/internal/version.h
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IMPH = $(addprefix $(srcdir)/, src/internal/stdio_impl.h src/internal/pthread_impl.h src/internal/locale_impl.h src/internal/libc.h)
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LDFLAGS =
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LDFLAGS_AUTO =
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LIBCC = -lgcc
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CPPFLAGS =
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CFLAGS =
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CFLAGS_AUTO = -Os -pipe
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CFLAGS_C99FSE = -std=c99 -ffreestanding -nostdinc
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CFLAGS_ALL = $(CFLAGS_C99FSE)
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CFLAGS_ALL += -D_XOPEN_SOURCE=700 -I$(srcdir)/arch/$(ARCH) -I$(srcdir)/arch/generic -Iobj/src/internal -I$(srcdir)/src/include -I$(srcdir)/src/internal -Iobj/include -I$(srcdir)/include
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CFLAGS_ALL += $(CPPFLAGS) $(CFLAGS_AUTO) $(CFLAGS)
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LDFLAGS_ALL = $(LDFLAGS_AUTO) $(LDFLAGS)
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AR = $(CROSS_COMPILE)ar
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RANLIB = $(CROSS_COMPILE)ranlib
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INSTALL = $(srcdir)/tools/install.sh
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ARCH_INCLUDES = $(wildcard $(srcdir)/arch/$(ARCH)/bits/*.h)
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GENERIC_INCLUDES = $(wildcard $(srcdir)/arch/generic/bits/*.h)
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INCLUDES = $(wildcard $(srcdir)/include/*.h $(srcdir)/include/*/*.h)
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ALL_INCLUDES = $(sort $(INCLUDES:$(srcdir)/%=%) $(GENH:obj/%=%) $(ARCH_INCLUDES:$(srcdir)/arch/$(ARCH)/%=include/%) $(GENERIC_INCLUDES:$(srcdir)/arch/generic/%=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 = $(addprefix lib/,$(notdir $(CRT_OBJS)))
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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 = obj/musl-gcc
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WRAPCC_GCC = gcc
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WRAPCC_CLANG = clang
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LDSO_PATHNAME = $(syslibdir)/ld-musl-$(ARCH)$(SUBARCH).so.1
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-include config.mak
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ifeq ($(ARCH),)
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all:
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@echo "Please set ARCH in config.mak before running make."
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@exit 1
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else
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all: $(ALL_LIBS) $(ALL_TOOLS)
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OBJ_DIRS = $(sort $(patsubst %/,%,$(dir $(ALL_LIBS) $(ALL_TOOLS) $(ALL_OBJS) $(GENH) $(GENH_INT))) obj/include)
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$(ALL_LIBS) $(ALL_TOOLS) $(ALL_OBJS) $(ALL_OBJS:%.o=%.lo) $(GENH) $(GENH_INT): | $(OBJ_DIRS)
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$(OBJ_DIRS):
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mkdir -p $@
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obj/include/bits/alltypes.h: $(srcdir)/arch/$(ARCH)/bits/alltypes.h.in $(srcdir)/include/alltypes.h.in $(srcdir)/tools/mkalltypes.sed
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sed -f $(srcdir)/tools/mkalltypes.sed $(srcdir)/arch/$(ARCH)/bits/alltypes.h.in $(srcdir)/include/alltypes.h.in > $@
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obj/include/bits/syscall.h: $(srcdir)/arch/$(ARCH)/bits/syscall.h.in
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cp $< $@
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sed -n -e s/__NR_/SYS_/p < $< >> $@
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obj/src/internal/version.h: $(wildcard $(srcdir)/VERSION $(srcdir)/.git)
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printf '#define VERSION "%s"\n' "$$(cd $(srcdir); sh tools/version.sh)" > $@
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obj/src/internal/version.o obj/src/internal/version.lo: obj/src/internal/version.h
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obj/crt/rcrt1.o obj/ldso/dlstart.lo obj/ldso/dynlink.lo: $(srcdir)/src/internal/dynlink.h $(srcdir)/arch/$(ARCH)/reloc.h
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obj/crt/crt1.o obj/crt/scrt1.o obj/crt/rcrt1.o obj/ldso/dlstart.lo: $(srcdir)/arch/$(ARCH)/crt_arch.h
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obj/crt/rcrt1.o: $(srcdir)/ldso/dlstart.c
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obj/crt/Scrt1.o obj/crt/rcrt1.o: CFLAGS_ALL += -fPIC
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OPTIMIZE_SRCS = $(wildcard $(OPTIMIZE_GLOBS:%=$(srcdir)/src/%))
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$(OPTIMIZE_SRCS:$(srcdir)/%.c=obj/%.o) $(OPTIMIZE_SRCS:$(srcdir)/%.c=obj/%.lo): CFLAGS += -O3
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MEMOPS_OBJS = $(filter %/memcpy.o %/memmove.o %/memcmp.o %/memset.o, $(LIBC_OBJS))
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$(MEMOPS_OBJS) $(MEMOPS_OBJS:%.o=%.lo): CFLAGS_ALL += $(CFLAGS_MEMOPS)
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NOSSP_OBJS = $(CRT_OBJS) $(LDSO_OBJS) $(filter \
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%/__libc_start_main.o %/__init_tls.o %/__stack_chk_fail.o \
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%/__set_thread_area.o %/memset.o %/memcpy.o \
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, $(LIBC_OBJS))
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$(NOSSP_OBJS) $(NOSSP_OBJS:%.o=%.lo): CFLAGS_ALL += $(CFLAGS_NOSSP)
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$(CRT_OBJS): CFLAGS_ALL += -DCRT
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$(LOBJS) $(LDSO_OBJS): CFLAGS_ALL += -fPIC
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CC_CMD = $(CC) $(CFLAGS_ALL) -c -o $@ $<
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# Choose invocation of assembler to be used
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ifeq ($(ADD_CFI),yes)
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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 $@ -
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else
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AS_CMD = $(CC_CMD)
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endif
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obj/%.o: $(srcdir)/%.s
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$(AS_CMD)
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obj/%.o: $(srcdir)/%.S
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$(CC_CMD)
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obj/%.o: $(srcdir)/%.c $(GENH) $(IMPH)
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$(CC_CMD)
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obj/%.lo: $(srcdir)/%.s
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$(AS_CMD)
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obj/%.lo: $(srcdir)/%.S
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$(CC_CMD)
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obj/%.lo: $(srcdir)/%.c $(GENH) $(IMPH)
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$(CC_CMD)
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lib/libc.so: $(LOBJS) $(LDSO_OBJS)
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$(CC) $(CFLAGS_ALL) $(LDFLAGS_ALL) -nostdlib -shared \
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-Wl,-e,_dlstart -o $@ $(LOBJS) $(LDSO_OBJS) $(LIBCC)
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lib/libc.a: $(AOBJS)
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rm -f $@
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$(AR) rc $@ $(AOBJS)
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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: obj/crt/$(ARCH)/%.o
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cp $< $@
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lib/%.o: obj/crt/%.o
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cp $< $@
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lib/musl-gcc.specs: $(srcdir)/tools/musl-gcc.specs.sh config.mak
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sh $< "$(includedir)" "$(libdir)" "$(LDSO_PATHNAME)" > $@
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obj/musl-gcc: config.mak
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printf '#!/bin/sh\nexec "$${REALGCC:-$(WRAPCC_GCC)}" "$$@" -specs "%s/musl-gcc.specs"\n' "$(libdir)" > $@
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chmod +x $@
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obj/%-clang: $(srcdir)/tools/%-clang.in config.mak
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sed -e 's!@CC@!$(WRAPCC_CLANG)!g' -e 's!@PREFIX@!$(prefix)!g' -e 's!@INCDIR@!$(includedir)!g' -e 's!@LIBDIR@!$(libdir)!g' -e 's!@LDSO@!$(LDSO_PATHNAME)!g' $< > $@
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chmod +x $@
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$(DESTDIR)$(bindir)/%: obj/%
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$(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/%: $(srcdir)/arch/$(ARCH)/bits/%
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$(INSTALL) -D -m 644 $< $@
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$(DESTDIR)$(includedir)/bits/%: $(srcdir)/arch/generic/bits/%
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$(INSTALL) -D -m 644 $< $@
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$(DESTDIR)$(includedir)/bits/%: obj/include/bits/%
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$(INSTALL) -D -m 644 $< $@
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$(DESTDIR)$(includedir)/%: $(srcdir)/include/%
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$(INSTALL) -D -m 644 $< $@
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$(DESTDIR)$(LDSO_PATHNAME): $(DESTDIR)$(libdir)/libc.so
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$(INSTALL) -D -l $(libdir)/libc.so $@ || 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: $(ALL_TOOLS:obj/%=$(DESTDIR)$(bindir)/%)
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install: install-libs install-headers install-tools
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musl-git-%.tar.gz: .git
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git --git-dir=$(srcdir)/.git archive --format=tar.gz --prefix=$(patsubst %.tar.gz,%,$@)/ -o $@ $(patsubst musl-git-%.tar.gz,%,$@)
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musl-%.tar.gz: .git
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git --git-dir=$(srcdir)/.git archive --format=tar.gz --prefix=$(patsubst %.tar.gz,%,$@)/ -o $@ v$(patsubst musl-%.tar.gz,%,$@)
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endif
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clean:
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rm -rf obj lib
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distclean: clean
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rm -f config.mak
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.PHONY: all clean install install-libs install-headers install-tools
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