Re: Why is GCL built with gcc@4.9?

[Efraim Flashner <efraim@flashner.co.il>]

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On Thu, Dec 13, 2018 at 12:03:59AM -0500, Mark H Weaver wrote:
> Hi Efraim,
> 
> I'm curious about this commit of yours from April 2017:
> 
> --8<---------------cut here---------------start------------->8---
> commit 5c7815f205e9164d4b82378de91bee7a65bcfbcb
> Author: Efraim Flashner <efraim@flashner.co.il>
> Date:   Mon Apr 10 05:20:09 2017 +0300
> 
>     gnu: gcl: Build with gcc@4.9.
>     
>     * gnu/packages/lisp.scm (gcl)[native-inputs]: Add gcc@4.9.
> --8<---------------cut here---------------end--------------->8---
> 
> Do you remember why you did this?  There's no explanation in the
> comments, nor in the commit log, nor in the 'bug-guix' or 'guix-devel'
> email archives from around that time.
> 
> I'd like to remove it, and I've verified that on x86_64-linux, GCL
> builds successfully with the default compiler.
> 
> In general, it would be good to include comments with rationale for
> workarounds like this, so that we have some idea of when the workaround
> can be removed, and what tests we must do to ensure that the original
> problem has been addressed.
> 
>      Thanks,
>        Mark

I looked through the commits and I'm not sure why I added gcc@4.9. When
did we change our default gcc from 4.9 to 5? I've made one attempt so
far at building on aarch64-linux without gcc@4.9 and I got a core-dump
but I haven't built it recently to see if it does that as-is.

I'll take a closer look at it and try to see what's up.


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Efraim Flashner   <efraim@flashner.co.il>   אפרים פלשנר
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