* c-lang.c (LANG_HOOKS_INCOMPLETE_TYPE_ERROR): Redefine.
	* c-tree.h (c_incomplete_type_error): New.
	* c-typeck.c (require_complete_type, build_component_ref): Update.
	(incomplete_type_error): Rename.
	* langhooks-def.h (lhd_incomplete_type_error): New.
	(LANG_HOOKS_INCOMPLETE_TYPE_ERROR): New.
	(LANG_HOOKS_FOR_TYPES_INITIALIZER): Update.
	* langhooks.c (lhd_incomplete_type_error): New.
	* langhooks.h (struct lang_hooks_for_types): New hook.
	* tree.c (size_in_bytes): Use new hook.
	* tree.h (incomplete_type_error): Remove.
ada:	* gigi.h (incomplete_type_error): Remove.
	* utils.c (incomplete_type_error): Remove.
cp:
	* call.c (build_new_method_call): Update.
	* cp-lang.c (LANG_HOOKS_INCOMPLETE_TYPE_ERROR): Redefine.
	* cp-tree.h (cxx_incomplete_type_error): New.
	* decl.c (grokdeclarator, grokparms): Update.
	* decl2.c (check_classfn): Update.
	* pt.c (tsubst): Update.
	* typeck.c (complete_type_or_else, expr_sizeof,
	decay_conversion): Update.
	* typeck2.c (incomplete_type_error): Rename.
	(add_exception_specifier): Update.
f:
	* com.c (incomplete_type_error): Remove.
java:
	* typeck.c (incomplete_type_error): Remove.
objc:
	* objc-lang.c (LANG_HOOKS_INCOMPLETE_TYPE_ERROR): Redefine.

From-SVN: r52480