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From: Thiago Jung Bauermann <bauermann@kolabnow.com>
To: Mathieu Othacehe <othacehe@gnu.org>
Cc: help-guix@gnu.org
Subject: Re: help with use of %current-target-system parameter and gexps
Date: Mon, 16 Aug 2021 16:30:19 -0300	[thread overview]
Message-ID: <2198298.QmL5SxD5ED@popigai> (raw)
In-Reply-To: <87fsvb8cu5.fsf@gnu.org>

Hello Mathieu,

Em domingo, 15 de agosto de 2021, às 03:02:42 -03, Mathieu Othacehe
escreveu:
> > +                ;; LuaJIT is not ported to powerpc64le* yet.
> > +                (if (string-prefix? "powerpc64le"
> > +                                    (or (%current-target-system)
> > +                                        (%current-system)))
> > +                    (substitute* fmtutilcnf
> > +                      (((string-append
> > "^(luajittex|luajithbtex|mfluajit)") m) +                      
> > (string-append "#! " m))))
> > 
> >                  ;; Register SHARE as TEXMFROOT in texmf.cnf.
> >                  (substitute* texmfcnf
> >                  
> >                    (("TEXMFROOT = \\$SELFAUTOPARENT")
> 
> The issue here is that the %current-target-system and %current-system
> are not defined at build time. You need to force their evaluation by
> using "unquote", this way:

Ah! I wasn’t aware of that trick. It indeed solved the problem. Thank you
very much for your help!

> --8<---------------cut here---------------start------------->8---
> (arguments
>  `(#:phases

‘texlive-texmf’  already has this quasiquote, so I only needed the unquote
below to make it work.

>    ...
>    (if (string-prefix? "powerpc64le"
>                       ,(or (%current-target-system)
>                            (%current-system)))
>       ...)))
> --8<---------------cut here---------------end--------------->8---
> 
> > +                #~(let-system (system target)
> > +                    ;; LuaJIT is not ported to powerpc64le* yet.
> 
> Here also you need to unquote this part, using "ungexp":
> 
> --8<---------------cut here---------------start------------->8---
>    #$(let-system (system target)
>       ...
> --8<---------------cut here---------------end--------------->8---

Not that it matters anymore, but just for completeness: unfortunately
I couldn’t make this one work. When I used “ungexp”, I got this error:

--8<---------------cut here---------------start------------->8---
[ 79%] GUILEC   gnu/packages/tex.go
gnu/packages/tex.scm:6832:24: warning: possibly unbound variable `substitute*'
gnu/packages/tex.scm:6832:24: warning: possibly unbound variable `fmtutilcnf'
gnu/packages/tex.scm:6833:27: warning: possibly unbound variable `m'
Compiling Scheme modules...
Compiling Scheme modules...
make[2]: Saindo do diretório '/home/debian/src/guix'

make[1]: Saindo do diretório '/home/debian/src/guix'

gnu/packages/tex.scm:6832:24: error: substitute*: unbound variable
hint: Did you forget `(use-modules (guix build utils))'?
--8<---------------cut here---------------end--------------->8---

I tried using this at the beginning of the gexp:

--8<---------------cut here---------------start------------->8---
            (with-imported-modules '((guix build utils))
              #~(begin
                  (use-modules ((guix build utils)))
                      ⋮
--8<---------------cut here---------------end--------------->8---

But it still resulted in the same error. But no problem, your “unquote”
solution worked.

-- 
Thanks,
Thiago




      reply	other threads:[~2021-08-16 19:31 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-14 18:18 help with use of %current-target-system parameter and gexps Thiago Jung Bauermann
2021-08-15  6:02 ` Mathieu Othacehe
2021-08-16 19:30   ` Thiago Jung Bauermann [this message]

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