Re: Reduce function call costs on ELF platforms

From: Peter Eisentraut <peter(dot)eisentraut(at)enterprisedb(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andres Freund <andres(at)anarazel(dot)de>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: Reduce function call costs on ELF platforms
Date: 2021-11-23 16:28:08
Message-ID: 2ff2077a-72ab-c40f-b772-e21669a0fe1f@enterprisedb.com
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On 22.11.21 23:32, Tom Lane wrote:
>> The easier approach for this class of issues is to use the linker option
>> -Bsymbolic.
> I don't recall details, but we've previously rejected the idea of
> trying to use -Bsymbolic widely; apparently it has undesirable
> side-effects on some platforms. See commit message for e3d77ea6b
> (hopefully there's some detail in the email thread [1]). It sounds
> like you're not actually proposing that, but I thought it would be
> a good idea to note the hazard here.

Also, IIRC, -Bsymbolic was once frowned upon by packaging policies,
since it prevents use of LD_PRELOAD. I'm not sure what the current
thinking there is, however.

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