1# Build a shared libgcc library with the darwin linker.
2SHLIB_SOVERSION = 1
3SHLIB_VERSTRING = -compatibility_version $(SHLIB_SOVERSION) -current_version $(SHLIB_SOVERSION).0
4SHLIB_EXT = .dylib
5SHLIB_INSTALL_NAME = @shlib_base_name@.$(SHLIB_SOVERSION)$(SHLIB_EXT)
6SHLIB_SONAME = @shlib_base_name@$(SHLIB_EXT)
7SHLIB_SOLINK = @shlib_base_name@.so
8SHLIB_MAP = @shlib_map_file@
9SHLIB_OBJS = @shlib_objs@
10SHLIB_DIR = @multilib_dir@
11SHLIB_LC = -lc
12
13# Darwin only searches in /usr/lib for shared libraries, not in subdirectories,
14# so the libgcc variants have different names not different locations.
15# Note that this version is used for the loader, not the linker; the linker
16# uses the stub versions named by the versioned members of $(INSTALL_FILES).
17
18SHLIB_LINK = $(CC) $(LIBGCC2_CFLAGS) -dynamiclib -nodefaultlibs \
19	-install_name @shlib_slibdir@/$(SHLIB_INSTALL_NAME) \
20	-single_module -o $(SHLIB_DIR)/$(SHLIB_SONAME) \
21	-Wl,-exported_symbols_list,$(SHLIB_MAP) \
22	$(SHLIB_VERSTRING) \
23	@multilib_flags@ $(SHLIB_OBJS) $(SHLIB_LC)
24
25SHLIB_MKMAP = $(srcdir)/mkmap-flat.awk
26SHLIB_MKMAP_OPTS = -v leading_underscore=1
27SHLIB_MAPFILES = libgcc-std.ver $(srcdir)/config/libgcc-libsystem.ver
28SHLIB_VERPFX = $(srcdir)/config/$(cpu_type)/libgcc-darwin
29
30# we're only going to build the stubs if the target slib is /usr/lib
31# there is no other case in which they're useful in a live system.
32ifeq (/usr/lib,$(shlib_slibdir))
33LGCC_STUBS = libgcc_s.10.4.dylib libgcc_s.10.5.dylib
34else
35LGCC_STUBS =
36endif
37
38LGCC_FILES = libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)
39LGCC_FILES += $(LGCC_STUBS)
40LEXT_STUBS = libgcc_ext.10.4$(SHLIB_EXT) libgcc_ext.10.5$(SHLIB_EXT)
41LGCC_FILES += $(LEXT_STUBS)
42INSTALL_FILES=$(LGCC_FILES)
43
44# we do our own thing
45SHLIB_INSTALL =
46
47# For the toplevel multilib, build a fat archive including all the multilibs.
48ifeq ($(MULTIBUILDTOP),)
49
50ifeq ($(enable_shared),yes)
51all: $(INSTALL_FILES)
52install-leaf: install-darwin-libgcc-stubs
53endif
54
55# In order to support -mmacosx-version-min, you need to have multiple
56# different libgcc_s libraries that actually get linked against, one for
57# each system version supported.  They are 'stub' libraries that
58# contain no code, just a list of exported symbols.
59# The actual use of the libraries is controlled by REAL_LIBGCC_SPEC.
60#
61# This assumes each multilib corresponds to a different architecture.
62libgcc_s.%.dylib : all-multi $(SHLIB_VERPFX).%.ver libgcc_s$(SHLIB_EXT)
63	MLIBS=`$(CC) --print-multi-lib | sed -e 's/;.*$$//'` ; \
64	for mlib in $$MLIBS ; do \
65	  $(STRIP) -o $(@)_T$${mlib} \
66	    -s $(SHLIB_VERPFX).$(*).ver -c -u \
67	    ../$${mlib}/libgcc/$${mlib}/libgcc_s$(SHLIB_EXT)  || exit 1 ; \
68	done
69	$(LIPO) -output $@ -create $(@)_T*
70	rm $(@)_T*
71
72libgcc_ext.%.dylib : all-multi $(SHLIB_VERPFX).%.ver libgcc_s$(SHLIB_EXT)
73	MLIBS=`$(CC) --print-multi-lib | sed -e 's/;.*$$//'` ; \
74	for mlib in $$MLIBS ; do \
75	  $(STRIP) -o $(@)_T$${mlib} \
76	    -R $(SHLIB_VERPFX).$(*).ver -c -urx \
77	    ../$${mlib}/libgcc/$${mlib}/libgcc_s$(SHLIB_EXT) || exit 1 ; \
78	done
79	$(LIPO) -output $@ -create $(@)_T*
80	rm $(@)_T*
81
82libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT): all-multi libgcc_s$(SHLIB_EXT)
83	MLIBS=`$(CC) --print-multi-lib | sed -e 's/;.*$$//'` ; \
84	for mlib in $$MLIBS ; do \
85	  cp ../$${mlib}/libgcc/$${mlib}/libgcc_s$(SHLIB_EXT)  \
86	    ./libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} || exit 1 ; \
87	done
88	$(LIPO) -output libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT) \
89	  -create libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*
90	rm libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*
91
92install-darwin-libgcc-stubs :
93	$(mkinstalldirs) $(DESTDIR)$(slibdir)
94	for d in $(INSTALL_FILES) ; do \
95	  $(INSTALL_DATA) $$d $(DESTDIR)$(slibdir)/$$d || exit 1 ; \
96	done
97	if [ -f $(DESTDIR)$(slibdir)/libgcc_s_ppc64.1.dylib ]; then \
98	  rm -f $(DESTDIR)$(slibdir)/libgcc_s_ppc64.1.dylib; \
99	else true; fi
100	$(LN_S) libgcc_s.1.dylib \
101		$(DESTDIR)$(slibdir)/libgcc_s_ppc64.1.dylib
102	if [ -f $(DESTDIR)$(slibdir)/libgcc_s_x86_64.1.dylib ]; then \
103	  rm -f $(DESTDIR)$(slibdir)/libgcc_s_x86_64.1.dylib; \
104	else true; fi
105	$(LN_S) libgcc_s.1.dylib \
106		$(DESTDIR)$(slibdir)/libgcc_s_x86_64.1.dylib
107
108else
109
110# Do not install shared libraries for any other multilibs.  Unless
111# we're putting them in the gcc directory during a build, for
112# compatibility with the pre-top-level layout.  In that case we
113# need symlinks.
114
115ifeq ($(enable_shared),yes)
116all: install-darwin-libgcc-links
117endif
118
119install-darwin-libgcc-links:
120	$(mkinstalldirs) $(gcc_objdir)$(MULTISUBDIR)
121	for file in $(INSTALL_FILES); do			\
122	  rm -f $(gcc_objdir)$(MULTISUBDIR)/$$file;		\
123	  $(LN_S) ../$$file $(gcc_objdir)$(MULTISUBDIR)/;	\
124	done
125
126	rm -f $(gcc_objdir)$(MULTISUBDIR)/libgcc_s_x86_64.1.dylib
127	$(LN_S) libgcc_s.1.dylib \
128		$(gcc_objdir)$(MULTISUBDIR)/libgcc_s_x86_64.1.dylib
129
130	rm -f $(gcc_objdir)$(MULTISUBDIR)/libgcc_s_ppc64.1.dylib
131	$(LN_S) libgcc_s.1.dylib \
132		$(gcc_objdir)$(MULTISUBDIR)/libgcc_s_ppc64.1.dylib
133
134endif
135