[bug#46124] [PATCH] Idris 2

[Xinglu Chen]

On Mon, May 03 2021, raingloom wrote:

> On Fri, 30 Apr 2021 10:24:42 +0200
> Xinglu Chen <public@yoctocell.xyz> wrote:
>
>> On Thu, Apr 29 2021, raingloom wrote:
>> 
>> > Here is the updated patch. No idea if this actually works cross
>> > compiled, but I don't have much time to test it. My suspicion is
>> > that it's likely broken and requires changes to Idris 2's code
>> > generators, because they almost definitely call Chez, GCC, etc,
>> > with the wrong arguments.  
>> 
>> I noticed that there is an ‘idris2_app’ directory in the ‘bin’
>> directory
>> 
>>   $ ls /gnu/store/va62hzp46c3dp2vlcnqc7fg109axj8rq-idris2-0.3.0/bin
>>   idris2*  idris2_app/
>> 
>> What is this used for?
>
> If you take a look at $(guix build idris2)/bin/idris2, it's actually
> just a wrapper. It contains the supporting dynamically linked shared
> objects and the executable itself.
>
> I don't know the details of what each file does or why it's like this,
> the codegen seems to use a similar structure for all backends. The
> scheme files are probably all for the Chez backend, the shared objects
> are either C libraries (for socket support and stuff), or compiled Chez
> code. I just noticed the Racket script, that I have no idea about.
>
> Idris 2's build system makes some... uhm... interesting choices, so
> it's entirely possible that not all of those are necessary, or could be
> moved somewhere more sensible.

Looking at the Nix package, they remove the wrapper and instead move
bin/idris2_app/idris2.so to bin/idris2 and wraps that executable[1].
Perhaps we could do the same thing?  I am not familiar with Idris,
though.

[1]: 
https://github.com/nixos/nixpkgs/blob//pkgs/development/compilers/idris2/default.nix#L41