Question about the tls_model attribute

Jakub Jelinek jakub@redhat.com
Wed Jun 13 10:07:00 GMT 2012


On Wed, Jun 13, 2012 at 11:03:01AM +0100, Hans Wennborg wrote:
> I have a question about the semantics of the tls_model attribute in GCC.
> 
> For code such as this:
> 
>   static __thread int __attribute((tls_model("global-dynamic"))) x;
>   int *f() { return &x; }
> 
> GCC will generate code using the global-dynamic model, also when
> compiled without -fpic.

That is correct, you've asked for it, therefore you get what you've asked
for.  The linker will probably optimize it back into local exec model,
but that is a separate thing.

	Jakub



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