darwin: don't do multi-arch stuff, just build a normal shared library

--- a/support/shobj-conf
+++ b/support/shobj-conf
@@ -180,34 +180,8 @@
 	SHLIB_LIBVERSION='$(SHLIB_MAJOR)$(SHLIB_MINOR).$(SHLIB_LIBSUFF)'
 	SHLIB_LIBSUFF='dylib'
 
-	# unused at this time
-	SHLIB_SONAME='$(libdir)/`echo $@ | sed "s:\\..*::"`.$(SHLIB_MAJOR).$(SHLIB_LIBSUFF)'
-
-	case "${host_os}" in
-	# Darwin versions 1, 5, 6, 7 correspond to Mac OS X 10.0, 10.1, 10.2,
-	# and 10.3, respectively.
-	darwin[1-7].*)
-		SHOBJ_STATUS=unsupported
-		SHOBJ_LDFLAGS='-dynamic'
-		SHLIB_XLDFLAGS='-arch_only `/usr/bin/arch` -install_name $(libdir)/`echo $@ | sed "s:\\..*::"`.$(SHLIB_MAJOR).$(SHLIB_LIBSUFF) -current_version $(SHLIB_MAJOR)$(SHLIB_MINOR) -compatibility_version $(SHLIB_MAJOR)$(SHLIB_MINOR) -v'
-		;;
-	# Darwin 8 == Mac OS X 10.4; Mac OS X 10.N == Darwin N+4
-	*)
-		case "${host_os}" in
-		darwin[89]*|darwin1[012]*)
-			SHOBJ_ARCHFLAGS='-arch_only `/usr/bin/arch`'
-			;;
-		 *) 	# Mac OS X 10.9 (Mavericks) and later
-			SHOBJ_ARCHFLAGS=
-			# for 32 and 64bit universal library
-			#SHOBJ_ARCHFLAGS='-arch i386 -arch x86_64'
-			#SHOBJ_CFLAGS=${SHOBJ_CFLAGS}' -arch i386 -arch x86_64'
-			;;
-		 esac
-		 SHOBJ_LDFLAGS="-dynamiclib -dynamic -undefined dynamic_lookup ${SHOBJ_ARCHFLAGS}"
-		 SHLIB_XLDFLAGS="-dynamiclib ${SHOBJ_ARCHFLAGS}"' -install_name $(libdir)/`echo $@ | sed "s:\\..*::"`.$(SHLIB_MAJOR).$(SHLIB_LIBSUFF) -current_version $(SHLIB_MAJOR)$(SHLIB_MINOR) -compatibility_version $(SHLIB_MAJOR)$(SHLIB_MINOR) -v'
-		;;
-	esac
+	SHOBJ_LDFLAGS='-dynamiclib -dynamic -undefined dynamic_lookup'
+	SHLIB_XLDFLAGS='-dynamiclib -install_name $(libdir)/`basename $@ $(SHLIB_MINOR)$(SHLIB_DOT)$(SHLIB_LIBSUFF)`$(SHLIB_DOT)$(SHLIB_LIBSUFF)  -current_version $(SHLIB_MAJOR)$(SHLIB_MINOR) -compatibility_version $(SHLIB_MAJOR)'
 
 	SHLIB_LIBS='-lncurses'	# see if -lcurses works on MacOS X 10.1 
 	;;