target-def.h (TARGET_CXX): Add TARGET_CXX_EXPORT_CLASS_DATA.

target-def.h (TARGET_CXX): Add TARGET_CXX_EXPORT_CLASS_DATA.

	* target-def.h (TARGET_CXX): Add TARGET_CXX_EXPORT_CLASS_DATA.
	* target.h (cxx): Add export_class_data.
	* config/arm/arm.c (arm_cxx_export_class_data): New function.
	(TARGET_CXX_EXPORT_CLASS_DATA): Use it.
	* testsuite/g++.dg/ext/visibility/arm1.C: New test.

	* cp-tree.h (DECL_CONSTRUCTION_VTABLE_P): New macro.
	* class.c (build_ctor_vtbl_group): Set DECL_CONSTRUCTION_VTABLE_P.
	* decl2.c (determine_visibility): Honor
	TARGET_CXX_EXPORT_CLASS_DATA.

	* g++.dg/ext/visibility/arm1.C: New test.

From-SVN: r86867