[build] Move ENABLE_EXECUTE_STACK to toplevel libgcc

[Paolo Bonzini]

On 06/07/2011 05:30 PM, Rainer Orth wrote:
>> >  So my view is that you should define __LIBGCC_TRAMPOLINE_SIZE__, only if
>> >  -fbuilding-libgcc.
> I can give it a try if I can figure out how to define -fbuilding-libgcc
> via the option handling machinery.  I just want to avoid having to
> implement too many unrelated cleanups, otherwise it will take a year to
> get this single patch done.

Agreed, what about just renaming the macro to __LIBGCC_TRAMPOLINE_SIZE__ 
for now?  I don't think it's fair to put on Rainer the burden of 
implementing the new flag right now.

If no one beats me to it, I'll look at it when coming back from holidays 
in two weeks.

Paolo