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Subject: Re: [gentoo-user] matplotlib build fails: link using /usr/lib instead
 of /usr/lib64
To: gentoo-user@lists.gentoo.org
References: <ralta7$1hmn$1@ciao.gmane.io>
From: Michael Orlitzky <mjo@gentoo.org>
Message-ID: <81b3bc3e-0f6e-ffb3-2b4f-affc6ccf363e@gentoo.org>
Date: Wed, 27 May 2020 10:44:16 -0400
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On 5/27/20 10:26 AM, Grant Edwards wrote:
> I tried to emerge matplotlib today, and it failed because it's linking
> in 32-bit libraries instead of 64 bit ones:
> 
> ...
> 
> What would cause that?
> 

On the command-line:

 -L/usr/lib -L/usr/lib64

Some part of... some build system... is buggy. Those flags can come from
many different places:

  * hard-coded in matplotlib or any of its dependencies' build systems

  * from a dependency's pkg-config file

  * incorrectly guessed by a ./configure test that didn't look too hard
    at which library it found

  * correctly guessed for a library that was installed to the wrong
    place (/usr/lib instead of /usr/lib64)

Et cetera. Best to file a bug.