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From: Wolfgang Walther <walther@technowledgy.de>
To: Bruce Momjian <bruce@momjian.us>
Cc: Thomas Munro <thomas.munro@gmail.com>
Cc: peter@eisentraut.org, Christophe Pettus <xof@thebuild.com>
Cc: Andrew Dunstan <andrew@dunslane.net>
Cc: PostgreSQL Bugs <pgsql-bugs@lists.postgresql.org>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Subject: Re: Regression tests fail with musl libc because libpq.so can't be loaded
Date: Wed, 20 Mar 2024 15:24:58 +0100
Message-ID: <1d11d75a-89cf-4e75-9c39-76bef37fc029@technowledgy.de> (raw)
In-Reply-To: <ZfrmmtMRLN6svkvv@momjian.us>
References: <CA+hUKG+Tq3GK7bPd03N0Eox3YY4-Hjd7qQjo_QZFjdbhTqQGQA@mail.gmail.com>
	<CA+hUKGK9LUq=uygBRFt3vFO1RL+_scsT4+hMkvea_zTttHZ59Q@mail.gmail.com>
	<ZfolyUQw9z1zxX58@momjian.us>
	<CA+hUKG+Y1D2Bv9v0GbYrhiQ+mhf=6Xj2_viiATnBVFShkfO4VQ@mail.gmail.com>
	<4093813.1710899588@sss.pgh.pa.us>
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	<4095435.1710900216@sss.pgh.pa.us>
	<CA+hUKGK2cSx3dveMqBD+E9N=zJ0WawBcbk_jnPqmdWBM0DT_3Q@mail.gmail.com>
	<477fa513-6bf0-456d-8d24-1e22a19df671@technowledgy.de>
	<ZfrmN4WHuJgD95fw@momjian.us>
	<ZfrmmtMRLN6svkvv@momjian.us>

Bruce Momjian:
> I guess we could conditionally exec only if we find we must, but then
> such exec cases would be rare and rarely tested.

I think you might be seriously underestimating how often musl is used. 
Alpine Linux uses musl and is very widespread in the container world 
because of smaller image size.

The library/postgres docker image has been pulled about 8 billion times 
since 2014 [1]. While we can't really tell how many of those pulled the 
alpine variant of the image, comparing the alpine [2] and ubuntu/debian 
[3,4] base images gives a rough estimate of >50% using alpine in general.

This is certainly not rare.

But yeah, buildfarm coverage for musl would be good, I agree. Maybe even 
directly in CI?

Best,

Wolfgang

[1]: https://hub.docker.com/v2/repositories/library/postgres
[2]: https://hub.docker.com/v2/repositories/library/alpine
[3]: https://hub.docker.com/v2/repositories/library/ubuntu
[4]: https://hub.docker.com/v2/repositories/library/debian





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  Subject: Re: Regression tests fail with musl libc because libpq.so can't be loaded
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