mirror of
https://github.com/fluencelabs/musl
synced 2025-04-24 23:02:14 +00:00
2f853dd6b9
this change adds support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different directory creates config.mak in the current working directory and symlinks the makefile, which contains the logic for creating all necessary directories and resolving paths relative to the source directory. to support both in-tree and out-of-tree builds with implicit make rules, all object files are now placed into a separate directory.
235 lines
7.8 KiB
Makefile
235 lines
7.8 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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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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BASE_SRCS = $(sort $(wildcard $(srcdir)/src/*/*.c $(srcdir)/arch/$(ARCH)/src/*.c))
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BASE_OBJS = $(patsubst $(srcdir)/%.c,%.o,$(BASE_SRCS))
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ARCH_SRCS = $(wildcard $(srcdir)/src/*/$(ARCH)/*.s $(srcdir)/src/*/$(ARCH)$(ASMSUBARCH)/*.sub)
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ARCH_OBJS = $(patsubst $(srcdir)/%.sub,%.o,$(patsubst $(srcdir)/%.s,%.o,$(ARCH_SRCS)))
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REPLACED_OBJS = $(sort $(subst /$(ARCH)$(ASMSUBARCH)/,/,$(subst /$(ARCH)/,/,$(ARCH_OBJS))) $(subst /$(ARCH)$(ASMSUBARCH)/,/$(ARCH)/,$(subst /$(ARCH)/,/,$(ARCH_OBJS))))
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OBJS = $(addprefix obj/, $(filter-out $(REPLACED_OBJS), $(sort $(BASE_OBJS) $(ARCH_OBJS))))
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LOBJS = $(OBJS:.o=.lo)
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GENH = obj/include/bits/alltypes.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/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/$(ARCH) -Iobj/src/internal -I$(srcdir)/src/internal -Iobj/include -I$(srcdir)/include
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CFLAGS_ALL += $(CPPFLAGS) $(CFLAGS_AUTO) $(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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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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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/%))
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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/rcrt1.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 = 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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$(error Please set ARCH in config.mak before running make.)
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endif
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all: $(ALL_LIBS) $(ALL_TOOLS)
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OBJ_DIRS = $(sort $(patsubst %/,%,$(dir $(ALL_LIBS) $(ALL_TOOLS) $(OBJS) $(GENH) $(GENH_INT))) $(addprefix obj/, crt crt/$(ARCH) include))
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$(ALL_LIBS) $(ALL_TOOLS) $(CRT_LIBS:lib/%=obj/crt/%) $(OBJS) $(LOBJS) $(GENH) $(GENH_INT): | $(OBJ_DIRS)
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$(OBJ_DIRS):
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mkdir -p $@
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install: install-libs install-headers install-tools
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clean:
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rm -f obj/crt/*.o obj/crt/$(ARCH)/*.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) $(GENH_INT)
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rm -f obj/include/bits/alltypes.h
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distclean: clean
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rm -f config.mak
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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/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/src/ldso/dlstart.lo obj/src/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/src/ldso/dlstart.lo: $(srcdir)/arch/$(ARCH)/crt_arch.h
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obj/crt/rcrt1.o: $(srcdir)/src/ldso/dlstart.c
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obj/crt/Scrt1.o obj/crt/rcrt1.o: CFLAGS_ALL += -fPIC
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obj/crt/$(ARCH)/crti.o: $(srcdir)/crt/$(ARCH)/crti.s
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obj/crt/$(ARCH)/crtn.o: $(srcdir)/crt/$(ARCH)/crtn.s
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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_SRCS = src/string/memcpy.c src/string/memmove.c src/string/memcmp.c src/string/memset.c
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$(MEMOPS_SRCS:%.c=obj/%.o) $(MEMOPS_SRCS:%.c=obj/%.lo): CFLAGS_ALL += $(CFLAGS_MEMOPS)
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NOSSP_SRCS = $(wildcard crt/*.c) \
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src/env/__libc_start_main.c src/env/__init_tls.c \
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src/thread/__set_thread_area.c src/env/__stack_chk_fail.c \
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src/string/memset.c src/string/memcpy.c \
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src/ldso/dlstart.c src/ldso/dynlink.c
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$(NOSSP_SRCS:%.c=obj/%.o) $(NOSSP_SRCS:%.c=obj/%.lo): CFLAGS_ALL += $(CFLAGS_NOSSP)
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$(CRT_LIBS:lib/%=obj/crt/%): CFLAGS_ALL += -DCRT
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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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$(patsubst $(srcdir)/%,obj/%,$(dir $(patsubst %/,%,$(dir $(1))))$(ARCH)$(ASMSUBARCH)/$(notdir $(1:.s=.o))): $(1)
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endef
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$(foreach s,$(wildcard $(srcdir)/src/*/$(ARCH)*/*.s),$(eval $(call mkasmdep,$(s))))
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# Choose invocation of assembler to be used
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# $(1) is input file, $(2) is output file, $(3) is assembler flags
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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) -x assembler -c -o $@ -
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else
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AS_CMD = $(CC) -c -o $@ $<
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endif
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obj/%.o: $(srcdir)/%.sub
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$(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $(dir $<)$$(cat $<)
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obj/%.o: $(srcdir)/%.s
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$(AS_CMD) $(CFLAGS_ALL_STATIC)
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obj/%.o: $(srcdir)/%.c $(GENH) $(IMPH)
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$(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $<
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obj/%.lo: $(srcdir)/%.sub
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$(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $(dir $<)$$(cat $<)
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obj/%.lo: $(srcdir)/%.s
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$(AS_CMD) $(CFLAGS_ALL_SHARED)
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obj/%.lo: $(srcdir)/%.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_ALL) -nostdlib -shared \
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-Wl,-e,_dlstart -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: obj/crt/%.o
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cp $< $@
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lib/crti.o: obj/crt/$(ARCH)/crti.o
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cp $< $@
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lib/crtn.o: obj/crt/$(ARCH)/crtn.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)$(includedir)/bits/%: obj/include/bits/%
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$(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)$(bindir)/%)
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musl-git-%.tar.gz: .git
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git --git-dir=$(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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.PHONY: all clean install install-libs install-headers install-tools
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