2011-11-15  Tristan Gingold  <gingold@adacore.com>

	* c-family/c-pragma.h (pragma_extern_prefix): Declare.
	* c-family/c-pragma.c (pragma_extern_prefix): Make it public.
	* config/vms/vms-c.c (saved_extern_prefix): New variable.
	(vms_pragma_extern_prefix): New function.
	(vms_c_register_pragma): Register vms_pragma_extern_prefix.

From-SVN: r181379