gdb/
	Code cleanup.
	* breakpoint.c (print_breakpoint_location): Replace bp_location field
	source_file references by symtab field references.  Remove variables
	sal and fullname.
	(momentary_breakpoint_from_master, add_location_to_breakpoint):
	(clear_command, say_where): Replace bp_location field source_file
	references by symtab field references.
	(bp_location_dtor): Remove the source_file reference.
	(update_static_tracepoint): Replace bp_location field source_file
	references by symtab field references.
	(breakpoint_free_objfile): New function.
	* breakpoint.h (struct bp_location): Extend the comment for line_number.
	Replace the field source_file by field symtab, extend its comment.
	(breakpoint_free_objfile): New declaration.
	* objfiles.c (free_objfile): Call breakpoint_free_objfile.
	* tui/tui-winsource.c (tui_update_breakpoint_info): Replace bp_location
	field source_file references by symtab field references.
gdb/
	Code cleanup.
	* breakpoint.c (clear_command): Remove variable is_abs, unify the
	call of filename_cmp with compare_filenames_for_search.
	* dwarf2read.c (dw2_map_symtabs_matching_filename): Remove variable
	is_abs, unify the call of FILENAME_CMP with
	compare_filenames_for_search.  New gdb_asserts for real_path and name.
	Unify the call of compare_filenames_for_search with FILENAME_CMP.
	* psymtab.c (partial_map_symtabs_matching_filename): Likewise.
	* symfile.h (struct quick_symbol_functions): Extend the comment for
	map_symtabs_matching_filename.
	* symtab.c (compare_filenames_for_search): Remove the function comment
	relative path requirement.  Handle absolute filenames, with a comment.
	(iterate_over_some_symtabs): Remove variable is_abs, unify the call of
	FILENAME_CMP with compare_filenames_for_search.  New gdb_asserts for
	real_path and name.  Unify the call of compare_filenames_for_search
	with FILENAME_CMP.
	(iterate_over_symtabs): New gdb_assert on REAL_PATH.

gdb/testsuite/
	* gdb.mi/mi-fullname-deleted.exp: Use double last slash for $srcfileabs.
	(compare_filenames_for_search does not match)
	(compare_filenames_for_search does match): New tests.
gdb/
	Code cleanup.
	* dwarf2read.c (dw2_expand_symtabs_with_filename): Rename to ...
	(dw2_expand_symtabs_with_fullname): ... here.  Rename parameter
	filename to fullname.  Rename variable this_name to this_fullname.
	Lowercase FILENAME_CMP call.
	(dw2_find_symbol_file): New comment for the returned string.
	(dwarf2_gdb_index_functions): Rename the function to
	dw2_expand_symtabs_with_fullname.
	* psymtab.c (read_psymtabs_with_filename): Rename to ...
	(read_psymtabs_with_fullname): ... here.  Rename parameter filename to
	fullname.
	(psym_functions): Rename the function to read_psymtabs_with_fullname.
	* symfile.h (struct quick_symbol_functions): Rename field
	expand_symtabs_with_filename to expand_symtabs_with_fullname and its
	parameter filename to fullname.  Document returned string meaning for
	find_symbol_file.
	* symtab.c (find_line_symtab): Rename the called function to
	expand_symtabs_with_fullname.
gdb/
	* tui/tui-data.c (init_win_info, tui_del_window, tui_free_window):
	Rename field reference filename to fullname.
	* tui/tui-data.h (struct tui_source_info): Rename field filename to
	fullname.  New comment for it.
	* tui/tui-source.c (tui_set_source_content): Rename field reference
	filename to fullname.  Initialize field by symtab_to_fullname now.
	* tui/tui-winsource.c (tui_update_breakpoint_info): Rename field
	reference filename to fullname.  Use symtab_to_fullname during
	comparison.
gdb/
	Add a new variable that controls a way in which filenames are
	displayed.
	* NEWS (set filename-display): New entry.
	* source.c (filename_display_basename, filename_display_relative)
	(filename_display_absolute, filename_display_kind_names)
	(filename_display_string, show_filename_display_string)
	(symtab_to_filename_for_display): New.
	(_initialize_source): Added initialization of 'filename-display'
	variable.
	* source.h (symtab_to_filename_for_display): Added declaration.
	* stack.c (print_frame): Added new variable and calling of a new
	function and condition with this variable. Changed third argument of
	calling of a function.

gdb/doc/
	* gdb.texinfo (Backtrace): Added description of 'filename-display'
	variable in 'set/show backtrace' section.

gdb/testsuite/
	* gdb.dwarf2/dw2-dir-file-name.exp: New file.
	* gdb.dwarf2/dw2-dir-file-name.c: New file.
gdb/
	* ada-lang.c (user_select_syms): Replace symtab->filename refererences
	by symtab_to_filename_for_display calls.
	* breakpoint.c (print_breakpoint_location, resolve_sal_pc): Likewise.
	(clear_command): New variable sal_fullname, initialize it.  Replace
	compare_filenames_for_search by filename_cmp with sal_fullname.
	(say_where, update_static_tracepoint): Replace symtab->filename
	refererences by symtab_to_filename_for_display calls.
	* cli/cli-cmds.c (edit_command, list_command, ambiguous_line_spec):
	Likewise.
	* dwarf2read.c: Include source.h.
	(fixup_go_packaging): Replace symtab->filename refererences by
	symtab_to_filename_for_display calls.
	* linespec.c (add_sal_to_sals): Rename variable filename to fullname.
	Replace symtab->filename refererences by symtab_to_filename_for_display
	calls.
	(create_sals_line_offset, convert_linespec_to_sals): New variable
	fullname, initialize it, replace symtab->filename reference by the
	variable.
	* linux-fork.c: Include source.h.
	(info_checkpoints_command): Replace symtab->filename refererences by
	symtab_to_filename_for_display calls.
	* macroscope.c (sal_macro_scope): Replace symtab->filename refererences
	by symtab_to_filename_for_display calls.
	* mdebugread.c: Include source.h.
	(psymtab_to_symtab_1): Replace symtab->filename refererences by
	symtab_to_filename_for_display calls.
	* mi/mi-cmd-file.c (mi_cmd_file_list_exec_source_file)
	(mi_cmd_file_list_exec_source_files): Likewise.
	* printcmd.c: Include source.h.
	(build_address_symbolic): Replace symtab->filename refererences by
	symtab_to_filename_for_display calls.
	* psymtab.c (partial_map_symtabs_matching_filename)
	(read_psymtabs_with_fullname): Call compare_filenames_for_search also
	with psymtab_to_fullname.
	* python/py-symtab.c (stpy_str): Replace symtab->filename refererences
	by symtab_to_filename_for_display calls.
	(stpy_get_filename): New variable filename, initialize it, use instead
	of symtab->filename refererences.
	(salpy_str): Make variable filename const char *.  Replace
	symtab->filename refererences by symtab_to_filename_for_display calls.
	* skip.c: Include source.h and filenames.h.
	(skip_file_command): Remove const from the symtab variable.  Replace
	symtab->filename refererences by symtab_to_fullname call.
	(function_name_is_marked_for_skip): New variables searched_for_fullname
	and fullname.  Use them to search also with symtab's fullname.
	* source.c (find_source_lines): Replace symtab->filename refererences
	by symtab_to_filename_for_display calls.
	(print_source_lines_base): New variable filename, use it instead of
	symtab->filename.  Replace symtab->filename refererences by
	symtab_to_filename_for_display calls.
	(line_info, forward_search_command): Replace symtab->filename
	refererences by symtab_to_filename_for_display calls.
	(reverse_search_command): Replace symtab->filename refererences by
	symtab_to_filename_for_display calls.  New variable filename for it.
	* stack.c (frame_info): Likewise.
	* symmisc.c: Include source.h.
	(dump_objfile, dump_symtab_1, maintenance_print_symbols)
	(maintenance_info_symtabs): Replace symtab->filename refererences by
	symtab_to_filename_for_display calls.
	* symtab.c (iterate_over_some_symtabs): Call
	compare_filenames_for_search also with symtab_to_fullname.
	(lookup_symbol_aux_quick, basic_lookup_transparent_type_quick): Replace
	symtab->filename refererences by symtab_to_filename_for_display calls.
	(find_line_symtab): Replace symtab->filename refererences by
	symtab_to_filename_for_display calls.
	(file_matches): Replace filename_cmp by compare_filenames_for_search.
	(print_symbol_info): Make the last parameter const char *.  New
	variable s_filename.  Use it in the function.
	(symtab_symbol_info): Make the last_filename variable const char *.
	Replace symtab->filename refererences by symtab_to_filename_for_display
	calls.
	(rbreak_command): New variable fullname.  Use it.  Replace
	symtab->filename refererence by symtab_to_filename_for_display call.
	* tracepoint.c (set_traceframe_context, trace_find_line_command)
	(print_one_static_tracepoint_marker): Replace symtab->filename
	refererences by symtab_to_filename_for_display calls.
	* tui/tui-source.c (tui_set_source_content): New variables filename and
	s_filename.  Replace symtab->filename refererences by this variable.
	Replace other symtab->filename refererences by
	symtab_to_filename_for_display calls.
gdb/
	* source.c (print_source_lines_base): Print for TUI also "fullname".
	* tui/tui-data.c (init_content_element): Change tui_locator_element
	field to full_name.
	* tui/tui-data.h (struct tui_locator_element): Likewise.
	* tui/tui-disasm.c (tui_show_disassem_and_update_source): Rename
	tui_update_locator_filename calls to tui_update_locator_fullname.
	Replace symtab->filename refererence by symtab_to_fullname call.
	* tui/tui-out.c (tui_field_string): Check for "fullname" now.
	* tui/tui-source.c (tui_set_source_content): Change tui_locator_element
	field to full_name.  Replace symtab->filename refererence by
	symtab_to_fullname call.
	(tui_show_symtab_source): Rename parameter to fullname.  Change
	tui_locator_element field to full_name.
	* tui/tui-stack.c: Include source.h.
	(tui_set_locator_filename): Rename the declaration to ...
	(tui_set_locator_fullname): ... here.  Rename its parameter to
	fullname, updates its comment.
	(tui_set_locator_info): Rename its parameter to fullname.
	(tui_set_locator_filename): Rename the definition to ...
	(tui_set_locator_fullname): ... here.  Rename its parameter to
	fullname, updates its comment.  Change tui_locator_element field to
	full_name.
	(tui_set_locator_info): Rename its parameter to fullname.
	(tui_set_locator_info): Rename callee to tui_set_locator_fullname.
	(tui_update_locator_filename): Rename to ...
	(tui_update_locator_fullname): ... here. Rename callee to
	tui_set_locator_fullname.
	(tui_show_frame_info): Replace symtab->filename refererence by
	symtab_to_fullname call.
	* tui/tui-stack.h (tui_update_locator_filename): Rename to ...
	(tui_update_locator_fullname): ... here.
	* tui/tui-winsource.c (tui_display_main): Rename the callee to
	tui_update_locator_fullname.  Replace symtab->filename refererence by
	symtab_to_fullname call.
	* tui/tui.c (tui_show_source): Rename its parameter to fullname.
	Rename the callee to tui_update_locator_fullname.
	* tui/tui.h (tui_show_source): Rename its parameter to fullname.
gdb/
	* dwarf2read.c (dw2_expand_symtabs_matching): Add basenames parameter
	to the file_matcher parameter.  Pass 0 to it.
	(dwarf2_create_include_psymtab): Copy also DIRNAME.
	* psymtab.c (partial_map_symtabs_matching_filename): Drop handling of
	NULL psymtab_to_fullname result.
	(psymtab_to_fullname): Remove variable r.  Never return NULL, assemble
	an expected filename instead.
	(expand_symtabs_matching_via_partial): Add basenames parameter to the
	file_matcher parameter.  Call also psymtab_to_fullname, after newly
	considering BASENAMES_MAY_DIFFER.
	* source.c (rewrite_source_path): Remove static.
	* source.h (rewrite_source_path): New declaration.
	* symfile.h (struct quick_symbol_functions): Add basenames parameter to
	the expand_symtabs_matching field.  Comment it.
	* symtab.c (file_matches): New function comment.  Add parameter
	basenames, implement it.
	(search_symbols_file_matches): Add basenames parameter.  Update the
	file_matches caller.
	(search_symbols): Match FILES also against symtab_to_fullname.
	Optimize it for BASENAMES_MAY_DIFFER.

gdb/testsuite/
	* gdb.base/fullpath-expand-func.c: New file.
	* gdb.base/fullpath-expand.c: New file.
	* gdb.base/fullpath-expand.exp: New file.
	* gdb.base/realname-expand-real.c: New file.
	* gdb.base/realname-expand.c: New file.
	* gdb.base/realname-expand.exp: New file.
gdb/
	* dwarf2read.c (dw2_map_symtabs_matching_filename): Move variable
	this_real_name to outer block.  Use it also for
	compare_filenames_for_search.
	(dw2_expand_symtabs_matching): New variable this_real_name.  Use it
	with dw2_get_real_path for file_matcher, considering also
	BASENAMES_MAY_DIFFER.
	(file_full_name): Prepend COMP_DIR even for relative lh->INCLUDE_DIRS.
gdb/
	* dwarf2read.c (file_file_name): New function with code from
	file_full_name.
	(file_full_name): Move most of the code to file_file_name.
	(macro_start_file): Rename variable full_name to file_name and use
	file_file_name for it.  Add comp_dir parameter to new_macro_table.
	* macrocmd.c (show_pp_source_pos): New variable fullname.  Replace any
	macro_source_file->filename access by macro_source_fullname call.
	* macroscope.c (_initialize_macroscope): Update the new_macro_table
	caller.
	* macrotab.c (struct macro_table): New field comp_dir.
	(macro_include): New variables link_fullname and source_fullname.
	Replace any macro_source_file->filename access by macro_source_fullname
	call.
	(macro_lookup_inclusion): Remove the partial filenames checking code.
	(check_for_redefinition): New variables source_fullname and
	found_key_fullname.  Replace any macro_source_file->filename access by
	macro_source_fullname call.
	(macro_undef): New variables source_fullname and key_fullname.  Replace
	any macro_source_file->filename access by macro_source_fullname call.
	(macro_lookup_definition): New variables retval and source_fullname.
	Replace any macro_source_file->filename access by macro_source_fullname
	call.
	(foreach_macro): New variable key_fullname.  Replace any
	macro_source_file->filename access by macro_source_fullname call.
	(foreach_macro_in_scope): New variable datum_fullname.  Replace any
	macro_source_file->filename access by macro_source_fullname call.
	(new_macro_table): Add parameter comp_dir.  Initialize T with it.
	(macro_source_fullname): New function.
	* macrotab.h (struct macro_source_file): Extent the filename field
	comment.
	(new_macro_table): New parameter comp_dir, add a comment for it.
	(macro_source_fullname): new declaration.

gdb/testsuite/
	* gdb.linespec/base/one/header.h: New file.
	* gdb.linespec/base/two/header.h: New file.
	* gdb.linespec/macro-relative.c: New file.
	* gdb.linespec/macro-relative.exp: New file.
gdb/
	* contrib/expect-read1.c: New file.
	* contrib/expect-read1.sh: New file.