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# Build a shared libgcc library with the darwin linker.

SHLIB_SOVERSION = 1

SHLIB_VERSTRING = -compatibility_version $(SHLIB_SOVERSION) -current_version $(SHLIB_SOVERSION).0

SHLIB_EXT = .dylib

SHLIB_SUFFIX = `if test @multilib_dir@ != . ; then echo _@multilib_dir@ ; fi`

SHLIB_SONAME = @shlib_base_name@$(SHLIB_SUFFIX).$(SHLIB_SOVERSION)$(SHLIB_EXT)

SHLIB_MAP = @shlib_map_file@

SHLIB_OBJS = @shlib_objs@

SHLIB_DIR = @multilib_dir@

# Darwin only searches in /usr/lib for shared libraries, not in subdirectories,

# so the libgcc variants have different names not different locations.

# Note that this version is used for the loader, not the linker; the linker

# uses the stub versions named by $(LIBGCC).

SHLIB_LINK = $(GCC_FOR_TARGET) $(LIBGCC2_CFLAGS) -dynamiclib -nodefaultlibs \

        -Wl,-install_name,$(slibdir)/$(SHLIB_SONAME) \

        -Wl,-flat_namespace -o $(SHLIB_SONAME).tmp \

        -Wl,-exported_symbols_list,$(SHLIB_MAP) \

        $(SHLIB_VERSTRING) \

        @multilib_flags@ $(SHLIB_OBJS) -lc && \

        if [ -f $(SHLIB_SONAME) ]; then \

          mv -f $(SHLIB_SONAME) $(SHLIB_SONAME).backup; \

        else true; fi && \

        mv $(SHLIB_SONAME).tmp $(SHLIB_SONAME)

# $(slibdir) double quoted to protect it from expansion while building

# libgcc.mk.  We want this delayed until actual install time.

SHLIB_INSTALL = \

        $$(mkinstalldirs) $$(DESTDIR)$$(slibdir); \

        $(INSTALL_DATA) $(SHLIB_SONAME) \

          $$(DESTDIR)$$(slibdir)/$(SHLIB_SONAME)

SHLIB_MKMAP = $(srcdir)/mkmap-flat.awk

SHLIB_MKMAP_OPTS = -v leading_underscore=1

SHLIB_MAPFILES += $(srcdir)/libgcc-std.ver

# Must use a different directive for hidden visibility in assembly sources.

ASM_HIDDEN_OP = .private_extern

# In order to support -mmacosx-version-min, you need to have multiple

# different libgcc_s libraries that actually get linked against, one for

# each system version supported.  They are 'stub' libraries that

# contain no code, just a list of exported symbols.

# The actual use of the libraries is controlled by REAL_LIBGCC_SPEC.

#

# This assumes each multilib corresponds to a different architecture.

libgcc_s.%.dylib : $(SHLIB_VERPFX).%.ver libgcc.a

        # When builting multilibbed target libraries, all the required

        # libraries are expected to exist in the multilib directory.

        MLIBS=`$(GCC_FOR_TARGET) --print-multi-lib \

                | sed -e 's/;.*$$//' -e '/^\.$$/d'` ; \

        for mlib in $$MLIBS ; do \

          rm -f $${mlib}/$@ || exit 1 ; \

          $(LN_S) ../$@ $${mlib}/$@ || exit 1 ; \

        done

        MLIBS=`$(GCC_FOR_TARGET) --print-multi-lib \

                | sed -e 's/;.*$$//' -e '/^\.$$/d' -e 's/^/_/'` ; \

        for mlib in '' $$MLIBS ; do \

          $(STRIP_FOR_TARGET) -o $(@)_T$${mlib} \

            -s $(SHLIB_VERPFX).$(*).ver -c -u \

            libgcc_s$${mlib}.$(SHLIB_SOVERSION)$(SHLIB_EXT) || exit 1 ; \

        done

        $(LIPO_FOR_TARGET) -output $@ -create $(@)_T*

        rm $(@)_T*

# From the point-of-view of the Makefiles, libgcc is built by the 'strip'

# and 'lipo' commands above.

LIBGCC=libgcc_s.10.4.dylib libgcc_s.10.5.dylib

install-darwin-libgcc-stubs : $(LIBGCC) installdirs

        for d in $(LIBGCC) ; do \

          $(INSTALL_DATA) $$d $(DESTDIR)$(slibdir)/$$d || exit 1 ; \

        done

INSTALL_LIBGCC += install-darwin-libgcc-stubs