gcc/
200x-xx-xx  Richard Sandiford  <richard@codesourcery.com>
	    Phil Edwards  <phil@codesourcery.com>

	* gthr-vxworks.h: Add an extern "C" wrapper for C++.
	(__gthread_once_t): Remove busy field for RTPs.
	(__GTHREAD_ONCE_INIT): Update accordingly.

Co-Authored-By: Phil Edwards <phil@codesourcery.com>

From-SVN: r122923