libgcc/config/t-slibgcc-darwin

   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