1 # Build a shared libgcc library able to use embedded runpaths. 2 3 SHLIB_SOVERSION = 1.1 4 SHLIB_SO_MINVERSION = 1 5 SHLIB_VERSTRING = -compatibility_version $(SHLIB_SO_MINVERSION) \ 6 -current_version $(SHLIB_SOVERSION) 7 SHLIB_EXT = .dylib 8 SHLIB_LC = -lSystem 9 10 SHLIB_MKMAP = $(srcdir)/mkmap-flat.awk 11 SHLIB_MKMAP_OPTS = -v leading_underscore=1 12 13 # Shorthand expressions for the LINK below, these are substituted in the 14 # link expression. 15 SHLIB_INSTALL_NAME = @shlib_base_name@.$(SHLIB_SOVERSION)$(SHLIB_EXT) 16 SHLIB_MAP = @shlib_map_file@ 17 SHLIB_DIR = @multilib_dir@ 18 SHLIB_SONAME = @shlib_base_name@$(SHLIB_EXT) 19 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. 24 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) 29 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@ $(SHLIB_LC) 36 37 # we do our own thing 38 SHLIB_INSTALL = 39 40 LGCC_FILES = libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT) 41 42 ifeq ($(BUILD_LIBGCCS1),YES) 43 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. 47 48 # For systems after macOS 10.7 we can forward the correct unwinder symbols 49 # from libSystem. 50 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. 57 58 # These targets are local to this make fragment, which means that they do not 59 # get the substitutions seen in SHLIB_LINK. 60 61 ifneq ($(LIBEHSOBJS),) 62 63 EHS_INSTNAME = libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT) 64 65 # multilib build for a shared EH lib. 66 67 libgcc_ehs$(SHLIB_EXT): $(LIBEHSOBJS) $(extra-parts) 68 mkdir -p $(MULTIDIR) 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) $(SHLIB_LC) 73 74 all: libgcc_ehs$(SHLIB_EXT) 75 76 LGCC_FILES += libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT) 77 78 endif 79 endif 80 81 INSTALL_FILES=$(LGCC_FILES) 82 83 ifeq ($(BUILD_LIBGCCS1),YES) 84 # Provide libgcc_s.1 for backwards compatibility. 85 INSTALL_FILES += libgcc_s.1.dylib 86 endif 87 88 # For the toplevel multilib, build FAT dylibs including all the multilibs. 89 ifeq ($(MULTIBUILDTOP),) 90 91 ifeq ($(enable_shared),yes) 92 all: $(INSTALL_FILES) 93 install-leaf: install-darwin-libgcc-stubs 94 endif 95 96 libgcc_s.$(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_$${mlib} || exit 1 ; \ 101 done 102 $(LIPO) -output libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT) \ 103 -create libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T* 104 rm libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T* 105 106 ifeq ($(BUILD_LIBGCCS1),YES) 107 ifneq ($(LIBEHSOBJS),) 108 109 libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT): all-multi libgcc_ehs$(SHLIB_EXT) 110 MLIBS=`$(CC) --print-multi-lib | sed -e 's/;.*$$//'` ; \ 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 ; \ 114 done 115 $(LIPO) -output libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT) \ 116 -create libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T* 117 rm libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T* 118 119 120 libgcc_s.1.dylib: all-multi libgcc_s.$(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_$${mlib} \ 133 -install_name $(SHLIB_RPATH)/libgcc_s.1.dylib \ 134 -compatibility_version 1 -current_version 1.1 ; \ 135 done 136 $(LIPO) -output libgcc_s.1$(SHLIB_EXT) -create libgcc_s.1$(SHLIB_EXT)_T* 137 rm libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T* 138 rm libgcc_ehs.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T* 139 140 else 141 142 libgcc_s.1.dylib: all-multi libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT) 143 MLIBS=`$(CC) --print-multi-lib | sed -e 's/;.*$$//'` ; \ 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} \ 151 -lSystem \ 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 ; \ 155 done 156 $(LIPO) -output libgcc_s.1$(SHLIB_EXT) -create libgcc_s.1$(SHLIB_EXT)_T* 157 rm libgcc_s.$(SHLIB_SOVERSION)$(SHLIB_EXT)_T* 158 159 endif 160 endif 161 162 # Install the shared libraries. 163 164 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 ; \ 169 done; \ 170 else \ 171 for d in $(INSTALL_FILES) ; do \ 172 $(INSTALL_DATA) $$d $(DESTDIR)$(slibdir)/$$d || exit 1 ; \ 173 done; \ 174 fi 175 176 else 177 178 # 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. 182 183 ifeq ($(enable_shared),yes) 184 all: install-darwin-libgcc-links 185 endif 186 187 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)/; \ 192 done 193 194 endif 195
Indexes created Fri Jun 05 00:26:10 UTC 2026