Re: Help with channel build system and package

[Jesse Millwood <jesse_m@fastmail.com>]

Thanks for the response Marek

On 2/8/24 12:00, Marek Paśnikowski wrote:
> 08.02.2024 15:32:44 CET Jesse:
>> Thanks for taking a look Carlo!
>>
>> On 2/7/24 22:37, Carlo Zancanaro wrote:
>>> Hi Jesse,
>>>
>>> I know very little about what you're trying to do, but there's one thing
>>> that looked wrong to me:
>>>
>>> On Wed, Feb 07 2024, Jesse wrote:
>>>> ...
>>>>
>>>>       (build-system crosstool-ng)
>>>>
>>>> ...
>>> This isn't a build system, right? It's just the package? I think you may
>>> want crosstool-ng-build-system here.
>> However, now I get this:
>>
>> guix build -v3 -L embedded-dev ct-ng-riscv64-unknown-elf
>> guix build: warning: invalid argument list
>> guix build: warning: source expression failed to match any pattern
>> error: crosstool-ng-build-system: unbound variable
>> hint: Did you forget `(use-modules (embedded-dev build-system
>> crosstool-ng))'?
>>
>> guix build: error: ct-ng-riscv64-unknown-elf: unknown package
>>
>> This confuses me a bit because it says that it is an unbound variable
>> but it is defined in embedded-dev/build-system/crosstool-ng.scm. I
>> believe I should be importing this module with the "#:use-module
>> (embedded-dev build-system crosstool-ng)" line in the package file. The
>> symbol should be exported with:
> I am just starting to understand how packaging works, but one thing that
> stands out to me is the #:sample keyword in arguments of the *riscv64* package
> definition. Where is it defined? Is the source correctly imported?

Ha, I am just trying to understand how packaging works too (or at least 
I think I am, lol).

That's a good catch and suggestion. I thought that by doing this in 
build-system/crosstool-ng.scm:

(define* (crosstool-ng-build name inputs
                              #:key (sample "unknown")
                              (test-target "test")
                              (tests? #t)
                              (phases '%standard-phases)
                              (outputs '("out"))
                              (search-paths '())
                              (system (%current-system))
                              (guile #f)
                              (imported-modules 
%crosstool-ng-build-system-modules)
                              (modules '((guix build 
crosstool-ng-build-system)
                                         (guix build utils)))
                              )

That the #:key (sample "unknown") was defining that as a keyword 
argument. It was a hold over from an idea I had that I kind of abandoned 
but didn't think it was causing any issues. I just removed that and the 
arguments line from the packages.

Now I get two invalid argument list errors:

guix build -v3 -L embedded-dev ct-ng-riscv64-unknown-elf
guix build: warning: invalid argument list
guix build: warning: invalid argument list
error: crosstool-ng-build-system: unbound variable
hint: Did you forget `(use-modules (embedded-dev build-system 
crosstool-ng))'?

guix build: error: ct-ng-riscv64-unknown-elf: unknown package

I guess I was thinking that it was saying that my invocation of the guix 
build command had an invalid argument given. I hadn't thought that it 
was talking about an argument given to one of the functions. That gives 
me some where to start looking at least.

>
> My hypothesis is that guix, upon loading the module in question:
> 1. fails to parse the #:sample keyword (invalid argument list warning)
> 2. fails to parse the package definition due to the above (pattern failure)
> 3. fails to find the package definition due to the above (unbound variable)
>
> This problem is educational to me, so give me the benefit of the doubt.

That's a sound hypothesis. It gives me a good idea of where to look, thanks!

Do you know of any way to increase the verbosity of error messages or 
logs to help debug where things are going awry?

>
> Sincerely,
>
> Marek Paśnikowski

Thanks,

Jesse