Apply the following change from the main trunk:

2000-10-22 00:05  levitte

	* Configure (1.232): FreeBSD-elf can do threads.  However, there
	seems to be confusion if you should defined _THREAD_SAFE (I found
	that in an include file, and that's what everybody tells me) or
	_THREADSAFE (that's what the gcc manual says in the
	FreeBSD-specific section), so I defined both, just to be safe.