From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mathieu Othacehe <m.othacehe@gmail.com>
Subject: Re: i686-linux GCC package on x86_64
Date: Fri, 11 Oct 2019 10:12:38 +0200
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To: Pierre Neidhardt <mail@ambrevar.xyz>
Cc: guix-devel@gnu.org


> This works but cross-gcc only delivers GCC and the libc.
> The "lib" output of the regular GCC is missing.
>
> In particular, I'd need libstdc++.so.

Then, that should be fine:

--8<---------------cut here---------------start------------->8---
    (native-inputs
     `(,@(if (not (string-prefix? "i686" (%current-system)))
           `(("cross-gcc" ,(cross-gcc "i686-unknown-linux-gnu"
                                      #:libc (cross-libc "i686-unknown-linux-gnu")))
             ("cross-binutils" ,(cross-binutils "i686-unknown-linux-gnu")))
           '())))
--8<---------------cut here---------------end--------------->8---

By default the #:libc field of cross-gcc is #f which seems to be the
issue for you.

Mathieu