extend.texi: Document that dllimport and dllexport imply default visibility.

extend.texi: Document that dllimport and dllexport imply default visibility.

2007-06-23  Mark Mitchell  <mark@codesourcery.com>

	* doc/extend.texi: Document that dllimport and dllexport imply
	default visibility.
	* tree.c (handle_dll_attribute): Set DECL_VISIBILITY on the
	imported or exported declaration, including type declarations.
	* c-common.c (handle_visibility_attribute): Check for conflicts
	with dllimport/dllexport.
	(c_determine_visibility): Handle dllimport/dllexport as an
	explicit visibility atttribute.

2007-06-23  Mark Mitchell  <mark@codesourcery.com>

	* decl2.c (determine_visibility): Don't look for dllexport here.
	(determine_visibility_from_class): Tidy.

2007-06-23  Mark Mitchell  <mark@codesourcery.com>

	* gcc.dg/visibility-12.c: New test.
	* gcc.dg/visibility-13.c: Likewise.
	* g++.dg/ext/visibility-9.C: Likewise.
	* g++.dg/ext/visibility-10.C: Likewise.

From-SVN: r125975