# 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

# Shorthand expressions for the LINK below.
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) $(LDFLAGS) -dynamiclib -nodefaultlibs \
	-install_name @shlib_slibdir@/$(SHLIB_INSTALL_NAME) \
	-single_module -o $(SHLIB_DIR)/$(SHLIB_SONAME) \
	-Wl,-exported_symbols_list,$(SHLIB_MAP) \
	$(SHLIB_VERSTRING) \
	@multilib_flags@ @shlib_objs@ $(SHLIB_LC)

SHLIB_MKMAP = $(srcdir)/mkmap-flat.awk
SHLIB_MKMAP_OPTS = -v leading_underscore=1

LGCC_FILES = libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)

INSTALL_FILES=$(LGCC_FILES)

# we do our own thing
SHLIB_INSTALL =

# For the toplevel multilib, build a fat archive 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*

# Install the shared library.

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 any other 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 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