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