Re: CVS commit: src

[Matt Thomas <matt%3am-software.com@localhost>]

On Sep 11, 2012, at 11:19 PM, Emmanuel Dreyfus wrote:

> Matt Thomas <matt%3am-software.com@localhost> wrote:
> 
>> Only those ports which reserve a register in mcontext for the TCB
>> pointer should define _UC_TLSBASE.  Otherwise _UC_TLSBASE has no
>> meaning and thus should not be defined.
> 
> Well, we have the choice between:
> - define it and keeep it unused
> - not define it add add #ifdef in libpthread and tests
> 
> I chose the second alternative, an unused #ifdef for a simplier code

In this case, I would prefer an #ifdef

_UC_TLSBASE is an MD thing.  Defining it unconditionally bloats things.
For instance, if _UC_TLSBASE isn't defined, pthread_setcontext doesn't
need to do anything except call setcontext.  That's a win.