Change so emacs at least compiles.

#undef C_SWITCH_MACHINE
#undef C_SWITCH_SYSTEM
#undef C_SWITCH_X_SITE

src/Makefile.in

@@ -250,9 +250,13 @@ GCONF_LIBS = @GCONF_LIBS@
    -DHAVE_CONFIG_H is needed for some other files to take advantage of
    the information in ``config.h''.  */
 
+#undef C_SWITCH_MACHINE
+#undef C_SWITCH_SYSTEM
+#undef C_SWITCH_X_SITE
+
 /* C_SWITCH_X_SITE must come before C_SWITCH_X_MACHINE and C_SWITCH_X_SYSTEM
    since it may have -I options that should override those two.  */
-ALL_CFLAGS=-Demacs -DHAVE_CONFIG_H $(MYCPPFLAGS) -I. -I${srcdir} $(C_SWITCH_MACHINE) $(C_SWITCH_SYSTEM) $(C_SWITCH_X_SITE) C_SWITCH_X_MACHINE C_SWITCH_X_SYSTEM ${CFLAGS_SOUND} ${RSVG_CFLAGS} ${DBUS_CFLAGS} ${GCONF_CFLAGS} ${CFLAGS} @FREETYPE_CFLAGS@ @FONTCONFIG_CFLAGS@ @LIBOTF_CFLAGS@ @M17N_FLT_CFLAGS@ ${DEPFLAGS}
+ALL_CFLAGS=-Demacs -DHAVE_CONFIG_H $(MYCPPFLAGS) -I. -I${srcdir} $(C_SWITCH_MACHINE) $(C_SWITCH_SYSTEM) $(C_SWITCH_X_SITE) ${CFLAGS_SOUND} ${RSVG_CFLAGS} ${DBUS_CFLAGS} ${GCONF_CFLAGS} ${CFLAGS} @FREETYPE_CFLAGS@ @FONTCONFIG_CFLAGS@ @LIBOTF_CFLAGS@ @M17N_FLT_CFLAGS@ ${DEPFLAGS}
 ALL_OBJC_CFLAGS=$(ALL_CFLAGS) @GNU_OBJC_CFLAGS@
 
 .SUFFIXES: .m