mirror of
git://git.musl-libc.org/musl
synced 2024-12-21 14:21:14 +00:00
c5e34dabbb
the only immediate effect of this commit is enabling PIE support on some archs that did not previously have any Scrt1.s, since the existing asm files for crt1 override this C code. so some of the crt_arch.h files committed are only there for the sake of documenting what their archs "would do" if they used the new C-based crt1. the expectation is that new archs should use this new system rather than using heavy asm for crt1. aside from being easier and less error-prone, it also ensures that PIE support is available immediately (since Scrt1.o is generated from the same C source, using -fPIC) rather than having to be added as an afterthought in the porting process.
158 lines
4.0 KiB
Makefile
158 lines
4.0 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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%.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: $(ARCH)/%.s
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$(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): $(DESTDIR)$(syslibdir)
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ln -sf $(libdir)/libc.so $@ || true
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$(DESTDIR)$(syslibdir):
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install -d -m 755 $(DESTDIR)$(syslibdir)
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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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