Re: Complier warnings on mingw gcc 4.5.0

On 12/13/2010 01:12 PM, Tom Lane wrote:
> Andrew Dunstan<andrew@dunslane.net>  writes:
>> On 12/13/2010 12:01 PM, Tom Lane wrote:
>>> It smells a little bit like an optimization bug.  Does dialing down to
>>> -O0 make it go away?
>> Sadly, no. I'm testing downgrading the compiler now.
> Mph.  FWIW, I see that my last build of Postgres for Fedora 14 would
> have been with gcc 4.5.1, because that's what F14 is shipping.  And
> that passed its regression tests on at least x86 and x86_64.  Maybe
> you should pester the mingw folk for a compiler update.
>
>             

Further digging shows some weirdness. This doesn't appear to be 
compiler-related. I've rolled back all the way to gcc 3.5. It is 
triggered by the following line in pg_regress.c, commenting out of which 
causes the problem to go away (although of course it causes the 
regression tests to fail):
    putenv(new_pgoptions);

cheers

andrew