Re: Problem with PostgreSQL 9.2.7 and make check on AIX 7.1

Hello,
I can see miscellaneous test failing on 7.1 TL3, too ... if I use -O2.
With -O1 there is no problem.

These are the failing / working flags. This problem was discovered by IBM.

# make check error
export CFLAGS="-qsuppress=1500-010 -O2 -qmaxmem=16384 -qsrcmsg"

# make check ok
export CFLAGS="-qsuppress=1500-010 -O1 -qmaxmem=16384 -qsrcmsg"

They have forwarded this to the compiler development team in Toronto.
I think that we can ignore this here. I will post the outcome of this
problem.
So that we can include a note in the INSTALL.

Bye
Rainer

On 12.03.2014 17:14, Tom Lane wrote:
> Rainer Tammer <pgsql(at)spg(dot)schulergroup(dot)com> writes:
>> it looks like these failures are caused by compiler optimizations -O2.
>> Without optimization the random failures do not show up.
> Yeah, that looked suspiciously compiler-bug-like to me. It's conceivable
> that it's not a compiler bug but something we're doing wherein the results
> are undefined per C standard ... but since we've not seen similar reports
> on other platforms, and since the misbehavior goes away again in TL3, I'm
> betting it's the compiler's fault.
>
> regards, tom lane
>
>