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Date: Mon, 28 Jan 2019 07:34:25 +0100
From: Florian Weimer <>
Subject: Re: Symbol versioning approximation trips on compat symbols

* u-uy:

> On Sat, Jan 26, 2019 at 11:04:24PM -0500, Rich Felker wrote:
>> For what it's worth, compat symbols would have let us remove symbols
>> that shouldn't have been put in musl, such as lchmod (which confuses
>> broken apps which wrongly expect that, if it exists, it should work)
> For what my integrator perspective is worth, exposing brokenness instead
> of catering for it is a Good Thing.
> Feature detection is one of the typical areas being messed up, in numerous
> softwares.
> Thanks musl for exposing the pitfalls and forcing upstreams think better.

As I explained, precisely that is not the case because the main musl
user, Alpine Linux, builds musl with a broken toolchain that is not
properly targeted to musl's features.  I think the official musl
instructions have the same result.

So far, no one has presented a compelling way how to test for symbol
versioning support.


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