* config/alpha/vms.h (VMS_DEBUGGING_INFO): New macro.
	(PREFERRED_DEBUGGING_TYPE): Define as VMS_AND_DWARF2_DEBUG.
	(ASM_SPEC): Don't redefine.
	(OPTIMIZATION_OPTIONS, OVERRIDE_OPTIONS, LINK_SPEC): Define.
	* config/alpha/t-vms (EXTRA_PARTS): Use; add rule for vms-dwarf2.asm.
	* config/alpha/vms-dwarf2.asm: New file.
	* Makefile.in (OBJS): Add vmsdbgout.c and its rule.
	* c-lex.c (init_c_lex): Test for VMS_AND_DWARF2_DEBUG.
	* debug.h (gcc_debug_hooks): Add vmsdbg_debug_hooks.
	(vmsdbgout_after_prologue): New declaration.
	* defaults.h (VMS_DEBUGGING_INFO): Add to PREFERRED_DEBUGGING_TYPE.
	* dwarf2.h (dwarf_attribute): New DW_AT_VMS_rtnbeg_pd_address.
	* dwarf2out.c (dwarf2out_do_frame): Test for VMS_AND_DWARF2_DEBUG.
	(dwarf2out_frame_finish): Test for VMS_AND_DWARF2_DEBUG.
	(dwarf_attr_name): Use DW_AT_VMS_rtnbeg_pd_address.
	(add_name_and_src_coords_attributes): Test VMS_DEBUGGING_INFO
	* final.c (final_start_function): Test for VMS_AND_DWARF2_DEBUG.
	Test VMS_DEBUGGING_INFO.
	(final_end_function): Test for VMS_AND_DWARF2_DEBUG.
	(final_scan_insn): Test for VMS_AND_DWARF2_DEBUG and VMS_DEBUG.
	* flags.h (debug_info_type): Add VMS_DEBUG and VMS_AND_DWARF2_DEBUG.
	* toplev.c (compile_file): Test VMS_DEBUGGING_INFO, VMS_DEBUG, and
	VMS_AND_DWARF2_DEBUG.
	(rest_of_type_compilation): Test for VMS_AND_DWARF2_DEBUG.
	(decode_g_option): Add "vms" to debug_type_names.
	(process_options): Set vmsdbg_debug_hooks if -gvms.
	(lang_independent_init): Emit line number for VMS unless -g0.
	* tree.c: (build_complex_type): Test for VMS_AND_DWARF2_DEBUG.
	* vmsdbg.h, vmsdbgout.c: New files.

From-SVN: r47532