1# Build a shared libgcc library with the darwin linker.
2SHLIB_SOVERSION = 1
3SHLIB_VERSTRING = -compatibility_version $(SHLIB_SOVERSION) -current_version $(SHLIB_SOVERSION).0
4SHLIB_EXT = .dylib
5SHLIB_SUFFIX = `if test @multilib_dir@ = ppc64 ; then echo _@multilib_dir@ ; fi`
6SHLIB_INSTALL_NAME = @shlib_base_name@$(SHLIB_SUFFIX).$(SHLIB_SOVERSION)$(SHLIB_EXT)
7SHLIB_SONAME = @shlib_base_name@.$(SHLIB_SOVERSION)$(SHLIB_EXT)
8SHLIB_SOLINK = @shlib_base_name@.so
9SHLIB_MAP = @shlib_map_file@
10SHLIB_OBJS = @shlib_objs@
11SHLIB_DIR = @multilib_dir@
12SHLIB_LC = -lc
13
14# Darwin only searches in /usr/lib for shared libraries, not in subdirectories,
15# so the libgcc variants have different names not different locations.
16# Note that this version is used for the loader, not the linker; the linker
17# uses the stub versions named by $(LIBGCC).
18SHLIB_LINK = $(GCC_FOR_TARGET) $(LIBGCC2_CFLAGS) -dynamiclib -nodefaultlibs \
19	-Wl,-install_name,$(slibdir)/$(SHLIB_INSTALL_NAME) \
20	-single_module -o $(SHLIB_DIR)/$(SHLIB_SONAME).tmp \
21	-Wl,-exported_symbols_list,$(SHLIB_MAP) \
22	$(SHLIB_VERSTRING) \
23	@multilib_flags@ $(SHLIB_OBJS) $(SHLIB_LC)
24
25# $(slibdir) double quoted to protect it from expansion while building
26# libgcc.mk.  We want this delayed until actual install time.
27SHLIB_INSTALL = \
28	$$(mkinstalldirs) $$(DESTDIR)$$(slibdir); \
29	$(INSTALL_DATA) $(SHLIB_SONAME) \
30	  $$(DESTDIR)$$(slibdir)/$(SHLIB_SONAME)
31
32SHLIB_MKMAP = $(srcdir)/mkmap-flat.awk
33SHLIB_MKMAP_OPTS = -v leading_underscore=1
34SHLIB_MAPFILES += $(srcdir)/libgcc-std.ver
35
36# Must use a different directive for hidden visibility in assembly sources.
37ASM_HIDDEN_OP = .private_extern
38
39# In order to support -mmacosx-version-min, you need to have multiple
40# different libgcc_s libraries that actually get linked against, one for
41# each system version supported.  They are 'stub' libraries that
42# contain no code, just a list of exported symbols.
43# The actual use of the libraries is controlled by REAL_LIBGCC_SPEC.
44#
45# This assumes each multilib corresponds to a different architecture.
46libgcc_s.%.dylib : $(SHLIB_VERPFX).%.ver stmp-multilib
47	# When building multilibbed target libraries, all the required
48	# libraries are expected to exist in the multilib directory.
49	MLIBS=`$(GCC_FOR_TARGET) --print-multi-lib \
50		| sed -e 's/;.*$$//' -e '/^\.$$/d'` ; \
51	for mlib in $$MLIBS ; do \
52	  rm -f $${mlib}/$@ || exit 1 ; \
53	  $(LN_S) ../$@ $${mlib}/$@ || exit 1 ; \
54	done
55	MLIBS=`$(GCC_FOR_TARGET) --print-multi-lib \
56		| sed -e 's/;.*$$//' -e '/^\.$$/d'` ; \
57	for mlib in '' $$MLIBS ; do \
58	  $(STRIP_FOR_TARGET) -o $(@)_T$${mlib} \
59	    -s $(SHLIB_VERPFX).$(*).ver -c -u \
60	    ./$${mlib}/libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT).tmp || exit 1 ; \
61	done
62	$(LIPO_FOR_TARGET) -output $@ -create $(@)_T*
63	rm $(@)_T*
64
65libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT): stmp-multilib libgcc_s.10.4.dylib \
66	libgcc_s.10.5.dylib
67	# When building multilibbed target libraries, all the required
68	# libraries are expected to exist in the multilib directory.
69	MLIBS=`$(GCC_FOR_TARGET) --print-multi-lib \
70		| sed -e 's/;.*$$//' -e '/^\.$$/d'` ; \
71	for mlib in '' $$MLIBS ; do \
72	  cp ./$${mlib}/libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT).tmp \
73	    ./libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} || exit 1 ; \
74	done
75	$(LIPO_FOR_TARGET) -output libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT) \
76	  -create libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*
77	rm libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*
78
79# From the point-of-view of the Makefiles, libgcc is built by the 'strip'
80# and 'lipo' commands above.
81LIBGCC=libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT) libgcc_s.10.4.dylib \
82	libgcc_s.10.5.dylib stmp-multilib
83
84INSTALL_FILES=libgcc_s.10.4.dylib libgcc_s.10.5.dylib libgcc_s.1.dylib
85
86install-darwin-libgcc-stubs : $(INSTALL_FILES) installdirs
87	for d in $(INSTALL_FILES) ; do \
88	  $(INSTALL_DATA) $$d $(DESTDIR)$(slibdir)/$$d || exit 1 ; \
89	done
90	if [ -f $(DESTDIR)$(slibdir)/libgcc_s_ppc64.1.dylib ]; then \
91	  rm -f $(DESTDIR)$(slibdir)/libgcc_s_ppc64.1.dylib; \
92	else true; fi
93	$(LN_S) libgcc_s.1.dylib \
94		$(DESTDIR)$(slibdir)/libgcc_s_ppc64.1.dylib
95	if [ -f $(DESTDIR)$(slibdir)/libgcc_s_x86_64.1.dylib ]; then \
96	  rm -f $(DESTDIR)$(slibdir)/libgcc_s_x86_64.1.dylib; \
97	else true; fi
98	$(LN_S) libgcc_s.1.dylib \
99		$(DESTDIR)$(slibdir)/libgcc_s_x86_64.1.dylib
100
101INSTALL_LIBGCC = install-darwin-libgcc-stubs install-multilib
102