./:	* doc/invoke.texi (Debugging Options): Add documentation for the
	-femit-struct-debug options -femit-struct-debug-baseonly,
	-femit-struct-debug-reduced, and
	-femit-struct-debug-detailed[=...].

	* c-opts.c (c_common_handle_option): Add
	OPT_femit_struct_debug_baseonly, OPT_femit_struct_debug_reduced,
	and OPT_femit_struct_debug_detailed_.
	* c.opt: Add specifications for
	-femit-struct-debug-baseonly, -femit-struct-debug-reduced,
	and -femit-struct-debug-detailed[=...].
	* opts.c (set_struct_debug_option): Parse the
	-femit-struct-debug-... options.
	* opts.c (matches_main_base, main_input_basename,
	main_input_baselength, base_of_path, matches_main_base): Add
	variables and functions to compare header base name to compilation
	unit base name.
	* opts.c (should_emit_struct_debug): Add to determine to emit a
	structure based on the option.
	(dump_struct_debug) Also disabled function to debug this
	function.
	* opts.c (handle_options): Save the base name of the
	compilation unit.

	* langhooks-def.h (LANG_HOOKS_GENERIC_TYPE_P): Define.
        (LANG_HOOKS_FOR_TYPES_INITIALIZER): Add.
	This hook indicates if a type is generic.  Set it by default
	to "never generic".
	* langhooks.h (struct lang_hooks_for_types): Add a new hook
	to determine if a struct type is generic or not.
	* cp/cp-tree.h (class_tmpl_impl_spec_p): Declare a C++ hook.
	* cp/tree.c (class_tmpl_impl_spec_p): Implement the C++ hook.
	* cp/cp-lang.c (LANG_HOOKS_GENERIC_TYPE_P): Override null C hook
	with live C++ hook.

	* flags.h (enum debug_info_usage): Add an enumeration to describe
	a program's use of a structure type.
	* dwarf2out.c (gen_struct_or_union_type_die): Add a new parameter
	to indicate the program's usage of the type.  Filter structs based
	on the -femit-struct-debug-... specification.
	(gen_type_die): Split into two routines, gen_type_die and
	gen_type_die_with_usage.  gen_type_die is now a wrapper
	that assumes direct usage.
	(gen_type_die_with_usage): Replace calls to gen_type_die
	with gen_type_die_with_usage adding the program usage of
	the referenced type.
	(dwarf2out_imported_module_or_decl): Suppress struct debug
	information using should_emit_struct_debug when appropriate.
testsuite/:
	* g++.dg/other/fesd-any.C: Test -femit-struct-debug-detailed=any.
	* g++.dg/other/fesd-any.h: Test -femit-struct-debug-detailed=any.
	* g++.dg/other/fesd-baseonly.C: Test -femit-struct-debug-baseonly.
	* g++.dg/other/fesd-baseonly.h: Test -femit-struct-debug-baseonly.
	* g++.dg/other/fesd-none.C: Test -femit-struct-debug-detailed=none.
	* g++.dg/other/fesd-none.h: Test -femit-struct-debug-detailed=none.
	* g++.dg/other/fesd-reduced.C: Test -femit-struct-debug-reduced.
	* g++.dg/other/fesd-reduced.h: Test -femit-struct-debug-reduced.
	* g++.dg/other/fesd-sys.C: Test -femit-struct-debug-detailed=sys.
	* g++.dg/other/fesd-sys.h: Test -femit-struct-debug-detailed=sys.
	* g++.dg/other/fesd.h: Common to -femit-struct-debug-... tests.

	* gcc.dg/fesd-any.c: Test -femit-struct-debug-detailed=any.
	* gcc.dg/fesd-any.h: Test -femit-struct-debug-detailed=any.
	* gcc.dg/fesd-baseonly.c: Test -femit-struct-debug-baseonly.
	* gcc.dg/fesd-baseonly.h: Test -femit-struct-debug-baseonly.
	* gcc.dg/fesd-none.c: Test -femit-struct-debug-detailed=none.
	* gcc.dg/fesd-none.h: Test -femit-struct-debug-detailed=none.
	* gcc.dg/fesd-reduced.c: Test -femit-struct-debug-reduced.
	* gcc.dg/fesd-reduced.h: Test -femit-struct-debug-reduced.
	* gcc.dg/fesd-sys.c: Test -femit-struct-debug-detailed=sys.
	* gcc.dg/fesd-sys.h: Test -femit-struct-debug-detailed=sys.
	* gcc.dg/fesd.h: Common to -femit-struct-debug-... tests.

From-SVN: r123909