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Re: Patch - Debug builds without optimization

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Peter Eisentraut <peter_e(at)gmx(dot)net>
Cc: Bruce Momjian <bruce(at)momjian(dot)us>, Greg Smith <greg(at)2ndQuadrant(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Patch - Debug builds without optimization
Date: 2011-11-29 22:12:11
Message-ID: 8632.1322604731@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
Peter Eisentraut <peter_e(at)gmx(dot)net> writes:
> On tis, 2011-11-29 at 16:32 -0500, Bruce Momjian wrote:
>> I have applied the attached patch to help make suggestsions for server
>> developers.  I didn't reproduce most of the text because it was already
>> listed with the options.  Let me know if you want additional text.

> Advising "server developers" to use CFLAGS="-O0 -g", without
> qualification, is dangerous, in my mind, because that loses a lot of
> compiler checks.  The only reason to use -O0 is when you really need to
> debug something in single steps and you can't make sense of it any other
> way.

Yes.  -O0 is really a pretty horrid default choice, and we should NOT be
recommending it, especially not with no discussion of the disadvantages.

			regards, tom lane

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Subject: Re: Avoiding repeated snapshot computation
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