externs and thread local storage

[Robert Dewar]

Richard Henderson wrote:
> On Sun, Jul 02, 2006 at 12:23:34PM -0700, Gary Funck wrote:
>> In my view, this is implementation-defined, and generally can vary
>> depending upon the underlying linker and OS technology.  Further,
>> there is at least one known platform (IA64) which seems to not impose
>> this restriction.
> 
> You're kidding, right?  *All* targets have to generate different
> code for thread-local storage.  If it didn't, it wouldn't be
> thread-local, would it?

That's not true, thread local storage can be done simply by mapping
hardware on some machines, where you swap maps on a context switch.
> 
> 
> r~