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