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jlechner |
# Build a shared libgcc library with the darwin linker.
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SHLIB_SOVERSION = 1
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SHLIB_VERSTRING = -compatibility_version $(SHLIB_SOVERSION) -current_version $(SHLIB_SOVERSION).0
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SHLIB_EXT = .dylib
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SHLIB_SUFFIX = `if test @multilib_dir@ != . ; then echo _@multilib_dir@ ; fi`
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SHLIB_SONAME = @shlib_base_name@$(SHLIB_SUFFIX).$(SHLIB_SOVERSION)$(SHLIB_EXT)
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SHLIB_MAP = @shlib_map_file@
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SHLIB_OBJS = @shlib_objs@
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SHLIB_DIR = @multilib_dir@
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# Darwin only searches in /usr/lib for shared libraries, not in subdirectories,
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# so the libgcc variants have different names not different locations.
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# Note that this version is used for the loader, not the linker; the linker
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# uses the stub versions named by $(LIBGCC).
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SHLIB_LINK = $(GCC_FOR_TARGET) $(LIBGCC2_CFLAGS) -dynamiclib -nodefaultlibs \
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-Wl,-install_name,$(slibdir)/$(SHLIB_SONAME) \
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-Wl,-flat_namespace -o $(SHLIB_SONAME).tmp \
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-Wl,-exported_symbols_list,$(SHLIB_MAP) \
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$(SHLIB_VERSTRING) \
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@multilib_flags@ $(SHLIB_OBJS) -lc && \
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if [ -f $(SHLIB_SONAME) ]; then \
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mv -f $(SHLIB_SONAME) $(SHLIB_SONAME).backup; \
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else true; fi && \
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mv $(SHLIB_SONAME).tmp $(SHLIB_SONAME)
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# $(slibdir) double quoted to protect it from expansion while building
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# libgcc.mk. We want this delayed until actual install time.
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SHLIB_INSTALL = \
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$$(mkinstalldirs) $$(DESTDIR)$$(slibdir); \
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$(INSTALL_DATA) $(SHLIB_SONAME) \
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$$(DESTDIR)$$(slibdir)/$(SHLIB_SONAME)
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SHLIB_MKMAP = $(srcdir)/mkmap-flat.awk
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SHLIB_MKMAP_OPTS = -v leading_underscore=1
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SHLIB_MAPFILES += $(srcdir)/libgcc-std.ver
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# Must use a different directive for hidden visibility in assembly sources.
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ASM_HIDDEN_OP = .private_extern
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# In order to support -mmacosx-version-min, you need to have multiple
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# different libgcc_s libraries that actually get linked against, one for
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# each system version supported. They are 'stub' libraries that
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# contain no code, just a list of exported symbols.
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# The actual use of the libraries is controlled by REAL_LIBGCC_SPEC.
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#
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# This assumes each multilib corresponds to a different architecture.
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libgcc_s.%.dylib : $(SHLIB_VERPFX).%.ver libgcc.a
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# When builting multilibbed target libraries, all the required
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# libraries are expected to exist in the multilib directory.
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MLIBS=`$(GCC_FOR_TARGET) --print-multi-lib \
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| sed -e 's/;.*$$//' -e '/^\.$$/d'` ; \
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for mlib in $$MLIBS ; do \
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rm -f $${mlib}/$@ || exit 1 ; \
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$(LN_S) ../$@ $${mlib}/$@ || exit 1 ; \
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done
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MLIBS=`$(GCC_FOR_TARGET) --print-multi-lib \
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| sed -e 's/;.*$$//' -e '/^\.$$/d' -e 's/^/_/'` ; \
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for mlib in '' $$MLIBS ; do \
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$(STRIP_FOR_TARGET) -o $(@)_T$${mlib} \
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-s $(SHLIB_VERPFX).$(*).ver -c -u \
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libgcc_s$${mlib}.$(SHLIB_SOVERSION)$(SHLIB_EXT) || exit 1 ; \
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done
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$(LIPO_FOR_TARGET) -output $@ -create $(@)_T*
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rm $(@)_T*
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# From the point-of-view of the Makefiles, libgcc is built by the 'strip'
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# and 'lipo' commands above.
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LIBGCC=libgcc_s.10.4.dylib libgcc_s.10.5.dylib
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install-darwin-libgcc-stubs : $(LIBGCC) installdirs
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for d in $(LIBGCC) ; do \
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$(INSTALL_DATA) $$d $(DESTDIR)$(slibdir)/$$d || exit 1 ; \
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done
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INSTALL_LIBGCC += install-darwin-libgcc-stubs
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