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# Build a shared libgcc library with the darwin linker.
SHLIB_SOVERSION = 1.1
SHLIB_SO_MINVERSION = 1
SHLIB_VERSTRING = -compatibility_version $(SHLIB_SO_MINVERSION) \
-current_version $(SHLIB_SOVERSION)
SHLIB_EXT = .dylib
SHLIB_LC = -lSystem
SHLIB_INSTALL_DIR = $(slibdir)
SHLIB_MKMAP = $(srcdir)/mkmap-flat.awk
SHLIB_MKMAP_OPTS = -v leading_underscore=1
# Shorthand expressions for the LINK below, these are substituted in the
# link expression.
SHLIB_INSTALL_NAME = @shlib_base_name@.$(SHLIB_SOVERSION)$(SHLIB_EXT)
SHLIB_MAP = @shlib_map_file@
SHLIB_DIR = @multilib_dir@
SHLIB_SONAME = @shlib_base_name@$(SHLIB_EXT)
# Darwin only searches in shlib_slibdir for shared libraries, not in
# subdirectories. The link builds one architecture slice in its designated
# subdir. The code under MULTIBUILDTOP combines these into a single FAT
# library, that is what we eventually install.
SHLIB_LINK = $(CC) $(LIBGCC2_CFLAGS) $(LDFLAGS) -dynamiclib -nodefaultlibs \
-install_name $(SHLIB_INSTALL_DIR)/$(SHLIB_INSTALL_NAME) \
-single_module -o $(SHLIB_DIR)/$(SHLIB_SONAME) \
-Wl,-exported_symbols_list,$(SHLIB_MAP) \
$(SHLIB_VERSTRING) \
@multilib_flags@ @shlib_objs@ $(SHLIB_LC)
# we do our own thing
SHLIB_INSTALL =
LGCC_FILES = libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)
ifeq ($(BUILD_LIBGCCS1),YES)
# We are going to build a libgcc_s.1.dylib so that distributions can
# install it for compatibility with binaries linked against the old
# libgcc_ext.10.x.dylib stubs.
# For systems after macOS 10.7 we can forward the correct unwinder symbols
# from libSystem.
# For older systems we have to forward an entire library (since they cannot
# selectively forward symbols, which means that we cannot forward the unwinder
# in /usr/lib/libgcc_s.1.dylib). We also cannot forward the entire library
# since that creates a self-referencing loop when DYLD_LIBRARY_PATH is used.
# To provide the unwinder symbols in this case, we build the unwinder into a
# separate shared lib (libgcc_ehs) and forward that.
# These targets are local to this make fragment, which means that they do not
# get the substitutions seen in SHLIB_LINK.
ifneq ($(LIBEHSOBJS),)
EHS_INSTNAME = libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT)
# multilib build for a shared EH lib.
$(LIBEHSOBJS): libgcc_tm.h
libgcc_ehs$(SHLIB_EXT): $(LIBEHSOBJS)
mkdir -p $(MULTIDIR)
$(CC) $(LIBGCC2_CFLAGS) $(LDFLAGS) -dynamiclib -nodefaultlibs \
-install_name $(SHLIB_INSTALL_DIR)/$(EHS_INSTNAME) \
-o $(MULTIDIR)/libgcc_ehs$(SHLIB_EXT) $(SHLIB_VERSTRING) \
$(LIBEHSOBJS) $(SHLIB_LC)
all: libgcc_ehs$(SHLIB_EXT)
LGCC_FILES += libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT)
endif
# Provide libgcc_s.1 for backwards compatibility.
LGCC_FILES += libgcc_s.1.dylib
endif
INSTALL_FILES=$(LGCC_FILES)
# For the toplevel multilib, build FAT dylibs including all the multilibs.
ifeq ($(MULTIBUILDTOP),)
ifeq ($(enable_shared),yes)
all: $(INSTALL_FILES)
install-leaf: install-darwin-libgcc-stubs
endif
libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT): all-multi libgcc_s$(SHLIB_EXT)
MLIBS=`$(CC) --print-multi-lib | sed -e 's/;.*$$//'` ; \
for mlib in $$MLIBS ; do \
cp ../$${mlib}/libgcc/$${mlib}/libgcc_s$(SHLIB_EXT) \
./libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} || exit 1 ; \
done
$(LIPO) -output libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT) \
-create libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*
rm libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*
ifeq ($(BUILD_LIBGCCS1),YES)
ifneq ($(LIBEHSOBJS),)
libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT): all-multi libgcc_ehs$(SHLIB_EXT)
MLIBS=`$(CC) --print-multi-lib | sed -e 's/;.*$$//'` ; \
for mlib in $$MLIBS ; do \
cp ../$${mlib}/libgcc/$${mlib}/libgcc_ehs$(SHLIB_EXT) \
./libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} || exit 1 ; \
done
$(LIPO) -output libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT) \
-create libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*
rm libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*
libgcc_s.1.dylib: libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT) libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT)
MLIBS=`$(CC) --print-multi-lib | sed -e 's/;.*$$//'` ; \
for mlib in $$MLIBS ; do \
cp ../$${mlib}/libgcc/$${mlib}/libgcc_s$(SHLIB_EXT) \
./libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} || exit 1 ; \
cp ../$${mlib}/libgcc/$${mlib}/libgcc_ehs$(SHLIB_EXT) \
./libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} || exit 1 ; \
arch=`$(LIPO) -info libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} | sed -e 's/.*:\ //'` ; \
$(CC) -arch $${arch} -nodefaultlibs -dynamiclib \
-o libgcc_s.1$(SHLIB_EXT)_T_$${mlib} \
-Wl,-reexport_library,libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} \
-Wl,-reexport_library,libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} \
-install_name $(SHLIB_INSTALL_DIR)/libgcc_s.1.dylib \
-compatibility_version 1 -current_version 1 ; \
done
$(LIPO) -output libgcc_s.1$(SHLIB_EXT) -create libgcc_s.1$(SHLIB_EXT)_T*
rm libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*
rm libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*
else
libgcc_s.1.dylib: libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)
MLIBS=`$(CC) --print-multi-lib | sed -e 's/;.*$$//'` ; \
for mlib in $$MLIBS ; do \
cp ../$${mlib}/libgcc/$${mlib}/libgcc_s$(SHLIB_EXT) \
./libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} || exit 1 ; \
arch=`$(LIPO) -info libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} | sed -e 's/.*:\ //'` ; \
$(CC) -arch $${arch} -nodefaultlibs -dynamiclib \
-o libgcc_s.1$(SHLIB_EXT)_T_$${mlib} \
-Wl,-reexport_library,libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} \
-lSystem \
-Wl,-reexported_symbols_list,$(srcdir)/config/darwin-unwind.ver \
-install_name $(SHLIB_INSTALL_DIR)/libgcc_s.1.dylib \
-compatibility_version 1 -current_version 1 ; \
done
$(LIPO) -output libgcc_s.1$(SHLIB_EXT) -create libgcc_s.1$(SHLIB_EXT)_T*
rm libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*
endif
endif
# Install the shared libraries.
install-darwin-libgcc-stubs :
$(mkinstalldirs) $(DESTDIR)$(slibdir)
for d in $(INSTALL_FILES) ; do \
$(INSTALL_DATA) $$d $(DESTDIR)$(slibdir)/$$d || exit 1 ; \
done
else
# Do not install shared libraries for multilibs. Unless we are putting them
# in the gcc directory during a build, for compatibility with the pre-top-
# level layout. In that case we provide symlinks to the FAT lib from the
# multilib sub-directories.
ifeq ($(enable_shared),yes)
all: install-darwin-libgcc-links
endif
install-darwin-libgcc-links:
$(mkinstalldirs) $(gcc_objdir)$(MULTISUBDIR)
for file in $(INSTALL_FILES); do \
rm -f $(gcc_objdir)$(MULTISUBDIR)/$$file; \
$(LN_S) ../$$file $(gcc_objdir)$(MULTISUBDIR)/; \
done
endif
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