From 06192153361a68ccb232fdbb0b491825f70ab792 Mon Sep 17 00:00:00 2001 From: Petr Hosek Date: Wed, 18 Nov 2015 12:07:32 -0800 Subject: [PATCH] support out-of-tree build this change add support for building musl outside of the source tree. the implementation is similar to autotools where running configure in a different folder 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. --- .gitignore | 1 + Makefile | 124 ++++++++++++++++++++++++++++++++++--------------------------- configure | 24 ++++++++++-- 3 files changed, 92 insertions(+), 57 deletions(-) diff --git a/.gitignore b/.gitignore index c5d5c46..36dc5f9 100644 --- a/.gitignore +++ b/.gitignore @@ -3,6 +3,7 @@ *.a *.so *.so.1 +obj arch/*/bits/alltypes.h config.mak include/bits diff --git a/Makefile b/Makefile index 2b21015..952cee9 100644 --- a/Makefile +++ b/Makefile @@ -8,6 +8,8 @@ # Do not make changes here. # +srcdir = . +objdir = obj exec_prefix = /usr/local bindir = $(exec_prefix)/bin @@ -16,12 +18,19 @@ includedir = $(prefix)/include libdir = $(prefix)/lib syslibdir = /lib -SRCS = $(sort $(wildcard src/*/*.c arch/$(ARCH)/src/*.c)) -OBJS = $(SRCS:.c=.o) +BASE_SRCS = $(sort $(wildcard $(srcdir)/src/*/*.c $(srcdir)/arch/$(ARCH)/src/*.c)) +BASE_OBJS = $(BASE_SRCS:$(srcdir)/%.c=%.o) +ARCH_SRCS = $(wildcard $(srcdir)/src/*/$(ARCH)/*.s) +ARCH_OBJS = $(ARCH_SRCS:$(srcdir)/%.s=%.o) +SUB_SRCS = $(wildcard $(srcdir)/src/*/$(ARCH)$(ASMSUBARCH)/*.sub) +SUB_OBJS = $(SUB_SRCS:$(srcdir)/%.sub=%.o) +EXCLUDE_ARCH_OBJS = $(patsubst $(srcdir)/%,%,$(subst /$(ARCH)/,/,$(patsubst $(srcdir)/%,%,$(ARCH_OBJS)))) +EXCLUDE_SUB_OBJS = $(patsubst $(srcdir)/%,%,$(subst /$(ARCH)$(ASMSUBARCH)/,/,$(patsubst $(srcdir)/%,%,$(SUB_OBJS)))) +OBJS = $(addprefix $(objdir)/, $(filter-out $(EXCLUDE_SUB_OBJS) $(EXCLUDE_ARCH_OBJS), $(BASE_OBJS)) $(ARCH_OBJS) $(SUB_OBJS)) 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 +GENH = $(objdir)/include/bits/alltypes.h +GENH_INT = $(objdir)/src/internal/version.h +IMPH = $(addprefix $(srcdir)/, src/internal/stdio_impl.h src/internal/pthread_impl.h src/internal/libc.h) LDFLAGS = LDFLAGS_AUTO = @@ -32,7 +41,7 @@ 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 += -D_XOPEN_SOURCE=700 -I$(srcdir)/arch/$(ARCH) $(sort -I$(objdir)/src/internal -I$(srcdir)/src/internal) $(sort -I$(objdir)/include -I$(srcdir)/include) CFLAGS_ALL += $(CPPFLAGS) $(CFLAGS_AUTO) $(CFLAGS) CFLAGS_ALL_STATIC = $(CFLAGS_ALL) CFLAGS_ALL_SHARED = $(CFLAGS_ALL) -fPIC -DSHARED @@ -41,10 +50,11 @@ LDFLAGS_ALL = $(LDFLAGS_AUTO) $(LDFLAGS) AR = $(CROSS_COMPILE)ar RANLIB = $(CROSS_COMPILE)ranlib -INSTALL = ./tools/install.sh +INSTALL = $(srcdir)/tools/install.sh -ARCH_INCLUDES = $(wildcard arch/$(ARCH)/bits/*.h) -ALL_INCLUDES = $(sort $(wildcard include/*.h include/*/*.h) $(GENH) $(ARCH_INCLUDES:arch/$(ARCH)/%=include/%)) +ARCH_INCLUDES = $(wildcard $(srcdir)/arch/$(ARCH)/bits/*.h) +INCLUDES = $(wildcard $(srcdir)/include/*.h $(srcdir)/include/*/*.h) +ALL_INCLUDES = $(sort $(INCLUDES:$(srcdir)/%=%) $(GENH) $(ARCH_INCLUDES:$(srcdir)/arch/$(ARCH)/%=include/%)) EMPTY_LIB_NAMES = m rt pthread crypt util xnet resolv dl EMPTY_LIBS = $(EMPTY_LIB_NAMES:%=lib/lib%.a) @@ -64,10 +74,23 @@ LDSO_PATHNAME = $(syslibdir)/ld-musl-$(ARCH)$(SUBARCH).so.1 all: $(ALL_LIBS) $(ALL_TOOLS) +$(ALL_LIBS): | lib/ +$(ALL_TOOLS): | tools/ +$(CRT_LIBS:lib/%=$(objdir)/crt/%): | $(objdir)/crt/ +$(OBJS) $(LOBJS): | $(sort $(dir $(OBJS))) +$(GENH): | $(objdir)/arch/$(ARCH)/bits/ +$(GENH_INT): | $(objdir)/src/internal/ +$(objdir)/include/bits: | $(objdir)/include + +SRC_DIRS = $(sort $(dir $(ALL_LIBS) $(ALL_TOOLS) $(OBJS) $(GENH_INT)) $(addprefix $(objdir)/, arch/$(ARCH)/bits/ crt/ include/)) + +$(SRC_DIRS): + mkdir -p $@ + install: install-libs install-headers install-tools clean: - rm -f crt/*.o + rm -f $(objdir)/crt/*.o rm -f $(OBJS) rm -f $(LOBJS) rm -f $(ALL_LIBS) lib/*.[ao] lib/*.so @@ -78,75 +101,65 @@ clean: distclean: clean rm -f config.mak -include/bits: +$(objdir)/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 > $@ +$(objdir)/include/bits/alltypes.h: $(srcdir)/arch/$(ARCH)/bits/alltypes.h.in $(srcdir)/include/alltypes.h.in $(srcdir)/tools/mkalltypes.sed $(objdir)/include/bits + sed -f $(srcdir)/tools/mkalltypes.sed $(srcdir)/arch/$(ARCH)/bits/alltypes.h.in $(srcdir)/include/alltypes.h.in > $@ -src/internal/version.h: $(wildcard VERSION .git) - printf '#define VERSION "%s"\n' "$$(sh tools/version.sh)" > $@ +$(objdir)/src/internal/version.h: $(wildcard $(srcdir)/VERSION $(srcdir)/.git) + printf '#define VERSION "%s"\n' "$$(cd $(srcdir); sh tools/version.sh)" > $@ -src/internal/version.lo: src/internal/version.h +$(objdir)/src/internal/version.lo: $(objdir)/src/internal/version.h -crt/rcrt1.o src/ldso/dlstart.lo src/ldso/dynlink.lo: src/internal/dynlink.h arch/$(ARCH)/reloc.h +$(objdir)/crt/rcrt1.o $(objdir)/src/ldso/dlstart.lo $(objdir)/src/ldso/dynlink.lo: $(srcdir)/src/internal/dynlink.h $(srcdir)/arch/$(ARCH)/reloc.h -crt/crt1.o crt/Scrt1.o crt/rcrt1.o src/ldso/dlstart.lo: $(wildcard arch/$(ARCH)/crt_arch.h) +$(objdir)/crt/crt1.o $(objdir)/crt/scrt1.o $(objdir)/crt/rcrt1.o $(objdir)/src/ldso/dlstart.lo: $(srcdir)/arch/$(ARCH)/crt_arch.h -crt/rcrt1.o: src/ldso/dlstart.c +$(objdir)/crt/rcrt1.o: $(srcdir)/src/ldso/dlstart.c -crt/Scrt1.o crt/rcrt1.o: CFLAGS_ALL += -fPIC +$(objdir)/crt/Scrt1.o $(objdir)/crt/rcrt1.o: CFLAGS_ALL += -fPIC -OPTIMIZE_SRCS = $(wildcard $(OPTIMIZE_GLOBS:%=src/%)) -$(OPTIMIZE_SRCS:%.c=%.o) $(OPTIMIZE_SRCS:%.c=%.lo): CFLAGS += -O3 +OPTIMIZE_SRCS = $(wildcard $(OPTIMIZE_GLOBS:%=$(srcdir)/src/%)) +$(OPTIMIZE_SRCS:$(srcdir)/%.c=$(objdir)/%.o) $(OPTIMIZE_SRCS:$(srcdir)/%.c=$(objdir)/%.lo): CFLAGS += -O3 MEMOPS_SRCS = src/string/memcpy.c src/string/memmove.c src/string/memcmp.c src/string/memset.c -$(MEMOPS_SRCS:%.c=%.o) $(MEMOPS_SRCS:%.c=%.lo): CFLAGS_ALL += $(CFLAGS_MEMOPS) +$(MEMOPS_SRCS:%.c=$(objdir)/%.o) $(MEMOPS_SRCS:%.c=$(objdir)/%.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)))) + $(srcdir)/src/env/__libc_start_main.c $(srcdir)/src/env/__init_tls.c \ + $(srcdir)/src/thread/__set_thread_area.c $(srcdir)/src/env/__stack_chk_fail.c \ + $(srcdir)/src/string/memset.c $(srcdir)/src/string/memcpy.c \ + $(srcdir)/src/ldso/dlstart.c $(srcdir)/src/ldso/dynlink.c +$(NOSSP_SRCS:$(srcdir)/%.c=$(objdir)/%.o) $(NOSSP_SRCS:$(srcdir)/%.c=$(objdir)/%.lo): CFLAGS_ALL += $(CFLAGS_NOSSP) + +$(CRT_LIBS:lib/%=$(objdir)/crt/%): CFLAGS_ALL += -DCRT # 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 $@ - + 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 $@ - else AS_CMD = $(CC) -c -o $@ $< endif -%.o: $(ARCH)$(ASMSUBARCH)/%.sub +$(objdir)/%.o: $(srcdir)/%.sub $(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $(dir $<)$(shell cat $<) -%.o: $(ARCH)/%.s +$(objdir)/%.o: $(srcdir)/%.s $(AS_CMD) $(CFLAGS_ALL_STATIC) -%.o: %.c $(GENH) $(IMPH) +$(objdir)/%.o: $(srcdir)/%.c $(GENH) $(IMPH) $(CC) $(CFLAGS_ALL_STATIC) -c -o $@ $< -%.lo: $(ARCH)$(ASMSUBARCH)/%.sub - $(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $(dir $<)$(shell cat $<) +$(objdir)/%.lo: $(srcdir)/%.sub + $(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $(dir $<)$(shell cat $<) -%.lo: $(ARCH)/%.s +$(objdir)/%.lo: $(srcdir)/%.s $(AS_CMD) $(CFLAGS_ALL_SHARED) -%.lo: %.c $(GENH) $(IMPH) +$(objdir)/%.lo: $(srcdir)/%.c $(GENH) $(IMPH) $(CC) $(CFLAGS_ALL_SHARED) -c -o $@ $< lib/libc.so: $(LOBJS) @@ -163,17 +176,17 @@ $(EMPTY_LIBS): rm -f $@ $(AR) rc $@ -lib/%.o: crt/%.o +lib/%.o: $(objdir)/crt/%.o cp $< $@ -lib/musl-gcc.specs: tools/musl-gcc.specs.sh config.mak +lib/musl-gcc.specs: $(srcdir)/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 +tools/%-clang: $(srcdir)/tools/%-clang.in config.mak sed -e 's!@CC@!$(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 $@ @@ -186,10 +199,13 @@ $(DESTDIR)$(libdir)/%.so: lib/%.so $(DESTDIR)$(libdir)/%: lib/% $(INSTALL) -D -m 644 $< $@ +$(DESTDIR)$(includedir)/bits/%: $(srcdir)/arch/$(ARCH)/bits/% + $(INSTALL) -D -m 644 $< $@ + $(DESTDIR)$(includedir)/bits/%: arch/$(ARCH)/bits/% $(INSTALL) -D -m 644 $< $@ -$(DESTDIR)$(includedir)/%: include/% +$(DESTDIR)$(includedir)/%: $(srcdir)/include/% $(INSTALL) -D -m 644 $< $@ $(DESTDIR)$(LDSO_PATHNAME): $(DESTDIR)$(libdir)/libc.so @@ -202,9 +218,9 @@ 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 $@ $(patsubst musl-git-%.tar.gz,%,$@) + git --git-dir=$(srcdir)/.git archive --format=tar.gz --prefix=$(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,%,$@) + git --git-dir=$(srcdir)/.git archive --format=tar.gz --prefix=$(patsubst %.tar.gz,%,$@)/ -o $@ v$(patsubst musl-%.tar.gz,%,$@) .PHONY: all clean install install-libs install-headers install-tools diff --git a/configure b/configure index dece1d0..60eb94f 100755 --- a/configure +++ b/configure @@ -9,6 +9,9 @@ VAR=VALUE. See below for descriptions of some of the useful variables. Defaults for the options are specified in brackets. +Configuration: + --srcdir=DIR source directory [detected] + Installation directories: --prefix=PREFIX main installation prefix [/usr/local/musl] --exec-prefix=EPREFIX installation prefix for executable files [PREFIX] @@ -117,6 +120,7 @@ CFLAGS_TRY= LDFLAGS_AUTO= LDFLAGS_TRY= OPTIMIZE_GLOBS= +srcdir= prefix=/usr/local/musl exec_prefix='$(prefix)' bindir='$(exec_prefix)/bin' @@ -139,6 +143,7 @@ clang_wrapper=no for arg ; do case "$arg" in --help) usage ;; +--srcdir=*) srcdir=${arg#*=} ;; --prefix=*) prefix=${arg#*=} ;; --exec-prefix=*) exec_prefix=${arg#*=} ;; --bindir=*) bindir=${arg#*=} ;; @@ -179,11 +184,23 @@ LIBCC=*) LIBCC=${arg#*=} ;; esac done -for i in prefix exec_prefix bindir libdir includedir syslibdir ; do +for i in srcdir prefix exec_prefix bindir libdir includedir syslibdir ; do stripdir $i done # +# Get the musl source dir for out-of-tree builds +# +if test -z "$srcdir" ; then +srcdir="${0%/configure}" +stripdir srcdir +fi +abs_builddir="$(pwd)" || fail "$0: cannot determine working directory" +abs_srcdir="$(cd $srcdir && pwd)" || fail "$0: invalid source directory $srcdir" +test "$abs_srcdir" = "$abs_builddir" && srcdir=. +ln -sf $srcdir/Makefile . + +# # Get a temp filename we can use # i=0 @@ -321,7 +338,7 @@ __attribute__((__may_alias__)) #endif x; EOF -if $CC $CFLAGS_C99FSE -I./arch/$ARCH -I./include $CPPFLAGS $CFLAGS \ +if $CC $CFLAGS_C99FSE -I$srcdir/arch/$ARCH -I$srcdir/include $CPPFLAGS $CFLAGS \ -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then printf "no\n" else @@ -620,7 +637,7 @@ echo '#include ' > "$tmpc" echo '#if LDBL_MANT_DIG == 53' >> "$tmpc" echo 'typedef char ldcheck[9-(int)sizeof(long double)];' >> "$tmpc" echo '#endif' >> "$tmpc" -if $CC $CFLAGS_C99FSE -I./arch/$ARCH -I./include $CPPFLAGS $CFLAGS \ +if $CC $CFLAGS_C99FSE -I$srcdir/arch/$ARCH -I$srcdir/include $CPPFLAGS $CFLAGS \ -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then printf "yes\n" else @@ -643,6 +660,7 @@ cat << EOF ARCH = $ARCH SUBARCH = $SUBARCH ASMSUBARCH = $ASMSUBARCH +srcdir = $srcdir prefix = $prefix exec_prefix = $exec_prefix bindir = $bindir -- 2.6.0.rc2.230.g3dd15c0