On Darwin, create dylibs with a versioning scheme like Linux/ELF, not
like BSD/ELF.
This patch uses intentionally ELF_* vars to make it easier to diff
against the ELF Makefile.

http://sourceforge.net/tracker/index.php?func=detail&aid=2555389&group_id=2406&atid=302406

--- lib/Makefile.darwin-lib
+++ lib/Makefile.darwin-lib
@@ -1,14 +1,15 @@
 #
-# This is a Makefile stub which handles the creation of Darwin BSD shared
-# libraries.
+# This is a Makefile stub which handles the creation of Darwin shared
+# libraries based on the ELF scheme.
 #
 # In order to use this stub, the following makefile variables must be defined.
-#
-# BSDLIB_VERSION = 1.0
-# BSDLIB_IMAGE = libce
-# BSDLIB_MYDIR = et
-# BSDLIB_INSTALL_DIR = $(SHLIBDIR)
-#
+# 
+# ELF_VERSION = 1.0
+# ELF_SO_VERSION = 1
+# ELF_IMAGE = libce
+# ELF_MYDIR = et
+# ELF_INSTALL_DIR = $(SHLIBDIR)
+# ELF_OTHER_LIBS = -lc
 
 all:: image
 
@@ -16,36 +17,58 @@
 	$(E) "	MKDIR pic"
 	$(Q) mkdir -p pic
 
-BSD_LIB = $(BSDLIB_IMAGE).$(BSDLIB_VERSION).dylib
-BSDLIB_PIC_FLAG = -fPIC
+ELF_LIB = $(ELF_IMAGE).$(ELF_VERSION).dylib
+ELF_SONAME = $(ELF_IMAGE).$(ELF_SO_VERSION).dylib
 
-image:		$(BSD_LIB)
+image:		$(ELF_LIB)
 
-$(BSD_LIB): $(OBJS)
-	$(E) "	GEN_BSD_SOLIB $(BSD_LIB)"
-	$(Q) (cd pic; $(CC) -dynamiclib -compatibility_version 1.0 -current_version $(BSDLIB_VERSION) \
-		-flat_namespace -undefined warning -o $(BSD_LIB) $(OBJS))
-	$(Q) $(MV) pic/$(BSD_LIB) .
-	$(Q) $(RM) -f ../$(BSD_LIB)
+$(ELF_LIB): $(OBJS)
+	$(E) "	GEN_ELF_SOLIB $(ELF_LIB)"
+	$(Q) (cd pic; $(CC) -dynamiclib -o $(ELF_LIB) $(LDFLAGS) \
+		-Wl,-install_name,$(libdir)/$(ELF_SONAME) $(OBJS) $(ELF_OTHER_LIBS))
+	$(Q) $(MV) pic/$(ELF_LIB) .
+	$(Q) $(RM) -f ../$(ELF_LIB) ../$(ELF_IMAGE).dylib ../$(ELF_SONAME)
 	$(Q) (cd ..; $(LN) $(LINK_BUILD_FLAGS) \
-		`echo $(my_dir) | sed -e 's;lib/;;'`/$(BSD_LIB) $(BSD_LIB))
-	$(Q) (cd ..; $(LN) $(LINK_BUILD_FLAGS) $(BSD_LIB) $(BSDLIB_IMAGE).dylib)
-
-install-shlibs install:: $(BSD_LIB)
-	$(E) "	INSTALL_PROGRAM $(BSDLIB_INSTALL_DIR)/$(BSD_LIB)"
-	$(Q) $(INSTALL_PROGRAM) $(BSD_LIB) \
-		$(DESTDIR)$(BSDLIB_INSTALL_DIR)/$(BSD_LIB)
-	-$(Q) $(LDCONFIG)
+		`echo $(my_dir) | sed -e 's;lib/;;'`/$(ELF_LIB) $(ELF_LIB))
+	$(Q) (cd ..; $(LN) $(LINK_BUILD_FLAGS) $(ELF_LIB) $(ELF_IMAGE).dylib)
+	$(Q) (cd ..; $(LN) $(LINK_BUILD_FLAGS) $(ELF_LIB) $(ELF_SONAME))
+
+installdirs-elf-lib::
+	$(E) "	MKINSTALLDIRS $(ELF_INSTALL_DIR) $(libdir)"
+	$(Q) $(MKINSTALLDIRS) $(DESTDIR)$(ELF_INSTALL_DIR) \
+		$(DESTDIR)$(libdir)
+
+installdirs:: installdirs-elf-lib
+
+install-shlibs install:: $(ELF_LIB) installdirs-elf-lib
+	$(E) "	INSTALL-ELF-LIB $(ELF_INSTALL_DIR)/$(ELF_LIB)"
+	$(Q) $(INSTALL_PROGRAM) $(ELF_LIB) $(DESTDIR)$(ELF_INSTALL_DIR)/$(ELF_LIB)
+	$(E) "	SYMLINK $(ELF_INSTALL_DIR)/$(ELF_SONAME)"
+	$(Q) $(LN_S) -f $(ELF_LIB) $(DESTDIR)$(ELF_INSTALL_DIR)/$(ELF_SONAME)
+	$(E) "	SYMLINK $(libdir)/$(ELF_IMAGE).dylib"
+	$(Q) if test "$(ELF_INSTALL_DIR)" = "$(libdir)"; then \
+		$(LN_S) -f $(ELF_SONAME) $(DESTDIR)$(libdir)/$(ELF_IMAGE).dylib ; \
+	else \
+		$(LN_S) -f $(ELF_INSTALL_DIR)/$(ELF_SONAME) \
+			$(DESTDIR)$(libdir)/$(ELF_IMAGE).dylib; \
+	fi			
 
 install-strip: install
+	$(E) "	STRIP-LIB $(ELF_INSTALL_DIR)/$(ELF_LIB)"
+	$(Q) $(STRIP) --strip-unneeded --remove-section=.comment \
+		--remove-section=.note $(DESTDIR)$(ELF_INSTALL_DIR)/$(ELF_LIB)
 
 install-shlibs-strip: install-shlibs
+	$(E) "	STRIP-LIB $(ELF_INSTALL_DIR)/$(ELF_LIB)"
+	$(Q) $(STRIP) --strip-unneeded --remove-section=.comment \
+		--remove-section=.note $(DESTDIR)$(ELF_INSTALL_DIR)/$(ELF_LIB)
 
 uninstall-shlibs uninstall::
-	$(RM) -f $(DESTDIR)$(BSDLIB_INSTALL_DIR)/$(BSD_LIB)
+	$(RM) -f $(DESTDIR)$(ELF_INSTALL_DIR)/$(ELF_LIB) \
+		$(DESTDIR)$(ELF_INSTALL_DIR)/$(ELF_SONAME) \
+		$(DESTDIR)$(libdir)/$(ELF_IMAGE).dylib
 
 clean::
 	$(RM) -rf pic
-	$(RM) -f $(BSD_LIB)
-	$(RM) -f ../$(BSD_LIB)
-	$(RM) -f ../$(BSDLIB_IMAGE).dylib
+	$(RM) -f $(ELF_LIB)
+	$(RM) -f ../$(ELF_LIB) ../$(ELF_IMAGE).dylib ../$(ELF_SONAME)