1 # Build a shared libgcc library able to use embedded runpaths.
4 SHLIB_SO_MINVERSION = 1
5 SHLIB_VERSTRING = -compatibility_version $(SHLIB_SO_MINVERSION) \
6 -current_version $(SHLIB_SOVERSION)
10 SHLIB_MKMAP = $(srcdir)/mkmap-flat.awk
11 SHLIB_MKMAP_OPTS = -v leading_underscore=1
13 # Shorthand expressions for the LINK below, these are substituted in the
15 SHLIB_INSTALL_NAME = @shlib_base_name@.$(SHLIB_SOVERSION)$(SHLIB_EXT)
16 SHLIB_MAP = @shlib_map_file@
17 SHLIB_DIR = @multilib_dir@
18 SHLIB_SONAME = @shlib_base_name@$(SHLIB_EXT)
20 # Darwin only searches in shlib_slibdir for shared libraries, not in
21 # subdirectories. The link builds one architecture slice in its designated
22 # subdir. The code under MULTIBUILDTOP combines these into a single FAT
23 # library, that is what we eventually install.
25 # When enable_darwin_at_rpath is true, use @rpath instead of $(slibdir) for
26 # this and dylibs that depend on this. So this def must come first and be
27 # overridden in a make fragment that depends on the rpath setting.
28 SHLIB_RPATH = $(slibdir)
30 SHLIB_LINK = $(CC) $(LIBGCC2_CFLAGS) $(LDFLAGS) -dynamiclib -nodefaultlibs \
31 -install_name $(SHLIB_RPATH)/$(SHLIB_INSTALL_NAME) \
32 -single_module -o $(SHLIB_DIR)/$(SHLIB_SONAME) \
33 -Wl,-exported_symbols_list,$(SHLIB_MAP) \
34 $(SHLIB_VERSTRING) -nodefaultrpaths \
35 @multilib_flags@ @shlib_objs@ $(SHLIB_LC)
40 LGCC_FILES = libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)
42 ifeq ($(BUILD_LIBGCCS1),YES)
44 # We are going to build a libgcc_s.1.dylib so that distributions can
45 # install it for compatibility with binaries linked against the old
46 # libgcc_ext.10.x.dylib stubs.
48 # For systems after macOS 10.7 we can forward the correct unwinder symbols
51 # For older systems we have to forward an entire library (since they cannot
52 # selectively forward symbols, which means that we cannot forward the unwinder
53 # in /usr/lib/libgcc_s.1.dylib). We also cannot forward the entire library
54 # since that creates a self-referencing loop when DYLD_LIBRARY_PATH is used.
55 # To provide the unwinder symbols in this case, we build the unwinder into a
56 # separate shared lib (libgcc_ehs) and forward that.
58 # These targets are local to this make fragment, which means that they do not
59 # get the substitutions seen in SHLIB_LINK.
61 ifneq ($(LIBEHSOBJS),)
63 EHS_INSTNAME = libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT)
65 # multilib build for a shared EH lib.
67 libgcc_ehs$(SHLIB_EXT): $(LIBEHSOBJS) $(extra-parts)
69 $(CC) $(LIBGCC2_CFLAGS) $(LDFLAGS) -dynamiclib -nodefaultlibs \
70 -install_name $(SHLIB_RPATH)/$(EHS_INSTNAME) \
71 -o $(MULTIDIR)/libgcc_ehs$(SHLIB_EXT) $(SHLIB_VERSTRING) \
72 -nodefaultrpaths $(LIBEHSOBJS) $(SHLIB_LC)
74 all: libgcc_ehs$(SHLIB_EXT)
76 LGCC_FILES += libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT)
81 INSTALL_FILES=$(LGCC_FILES)
83 ifeq ($(BUILD_LIBGCCS1),YES)
84 # Provide libgcc_s.1 for backwards compatibility.
85 INSTALL_FILES += libgcc_s.1.dylib
88 # For the toplevel multilib, build FAT dylibs including all the multilibs.
89 ifeq ($(MULTIBUILDTOP),)
91 ifeq ($(enable_shared),yes)
93 install-leaf: install-darwin-libgcc-stubs
96 libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT): all-multi libgcc_s$(SHLIB_EXT)
97 MLIBS=`$(CC) --print-multi-lib | sed -e 's/;.*$$//'` ; \
98 for mlib in $$MLIBS ; do \
99 cp ../$${mlib}/libgcc/$${mlib}/libgcc_s$(SHLIB_EXT) \
100 ./libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} || exit 1 ; \
102 $(LIPO) -output libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT) \
103 -create libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*
104 rm libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*
106 ifeq ($(BUILD_LIBGCCS1),YES)
107 ifneq ($(LIBEHSOBJS),)
109 libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT): all-multi libgcc_ehs$(SHLIB_EXT)
110 MLIBS=`$(CC) --print-multi-lib | sed -e 's/;.*$$//'` ; \
111 for mlib in $$MLIBS ; do \
112 cp ../$${mlib}/libgcc/$${mlib}/libgcc_ehs$(SHLIB_EXT) \
113 ./libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} || exit 1 ; \
115 $(LIPO) -output libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT) \
116 -create libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*
117 rm libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*
120 libgcc_s.1.dylib: all-multi libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT) \
121 libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT)
122 MLIBS=`$(CC) --print-multi-lib | sed -e 's/;.*$$//'` ; \
123 for mlib in $$MLIBS ; do \
124 cp ../$${mlib}/libgcc/$${mlib}/libgcc_s$(SHLIB_EXT) \
125 ./libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} || exit 1 ; \
126 cp ../$${mlib}/libgcc/$${mlib}/libgcc_ehs$(SHLIB_EXT) \
127 ./libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} || exit 1 ; \
128 arch=`$(LIPO) -info libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} | sed -e 's/.*:\ //'` ; \
129 $(CC) -arch $${arch} -nodefaultlibs -dynamiclib -nodefaultrpaths \
130 -o libgcc_s.1$(SHLIB_EXT)_T_$${mlib} \
131 -Wl,-reexport_library,libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} \
132 -Wl,-reexport_library,libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} \
133 -install_name $(SHLIB_RPATH)/libgcc_s.1.dylib \
134 -compatibility_version 1 -current_version 1.1 ; \
136 $(LIPO) -output libgcc_s.1$(SHLIB_EXT) -create libgcc_s.1$(SHLIB_EXT)_T*
137 rm libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*
138 rm libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*
142 libgcc_s.1.dylib: all-multi libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)
143 MLIBS=`$(CC) --print-multi-lib | sed -e 's/;.*$$//'` ; \
144 for mlib in $$MLIBS ; do \
145 cp ../$${mlib}/libgcc/$${mlib}/libgcc_s$(SHLIB_EXT) \
146 ./libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} || exit 1 ; \
147 arch=`$(LIPO) -info libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} | sed -e 's/.*:\ //'` ; \
148 $(CC) -arch $${arch} -nodefaultlibs -dynamiclib -nodefaultrpaths \
149 -o libgcc_s.1$(SHLIB_EXT)_T_$${mlib} \
150 -Wl,-reexport_library,libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T_$${mlib} \
152 -Wl,-reexported_symbols_list,$(srcdir)/config/darwin-unwind.ver \
153 -install_name $(SHLIB_RPATH)/libgcc_s.1.dylib \
154 -compatibility_version 1 -current_version 1.1 ; \
156 $(LIPO) -output libgcc_s.1$(SHLIB_EXT) -create libgcc_s.1$(SHLIB_EXT)_T*
157 rm libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T*
162 # Install the shared libraries.
164 install-darwin-libgcc-stubs :
165 $(mkinstalldirs) $(DESTDIR)$(slibdir)
166 if test x$(slibdir) = x; then \
167 for d in $(LGCC_FILES) ; do \
168 $(INSTALL_DATA) $$d $(DESTDIR)$(slibdir)/$$d || exit 1 ; \
171 for d in $(INSTALL_FILES) ; do \
172 $(INSTALL_DATA) $$d $(DESTDIR)$(slibdir)/$$d || exit 1 ; \
178 # Do not install shared libraries for multilibs. Unless we are putting them
179 # in the gcc directory during a build, for compatibility with the pre-top-
180 # level layout. In that case we provide symlinks to the FAT lib from the
181 # multilib sub-directories.
183 ifeq ($(enable_shared),yes)
184 all: install-darwin-libgcc-links
187 install-darwin-libgcc-links:
188 $(mkinstalldirs) $(gcc_objdir)$(MULTISUBDIR)
189 for file in $(INSTALL_FILES); do \
190 rm -f $(gcc_objdir)$(MULTISUBDIR)/$$file; \
191 $(LN_S) ../$$file $(gcc_objdir)$(MULTISUBDIR)/; \