gcc/
	* common.opt (use_gnu_debug_info_extensions): Delete DWARF_DEBUG from
	comment.
	* config/vx-common.h (DWARF_DEBUGGING_INFO): Delete undef.
	* doc/tm.texi.in (PREFERRED_DEBUGGING_TYPE): Delete DWARF_DEBUG
	reference.
	* doc/tm.texi: Regenerate.

From-SVN: r255345