Jan Nieuwenhuizen writes:

> As discussed on IRC, I tried to apply perl-cross
> (https://github.com/arsv/perl-cross) to make perl actually cross build
> for our Hurd VM.

Find an improved patch below.  It fixes

>     Can't exec "": No such file or directory at /gnu/store/dd5a35aca6411w5l29ask7pl626v8j4r-perl-5.30.2/lib/perl5/5.30.2/i586-/Cwd.pm line 204.
>     Can't exec "": No such file or directory at /gnu/store/mfnmg1m37kyrb65alnj6jn2fzw7zkapw-autoconf-cross-2.69/share/autoconf/Autom4te/FileUtils.pm line 345.

which was due to having

    #define SH_PATH ""

in config.h.  It also fixes "cwd" in perl, that was caused by this

              (substitute* "dist/PathTools/Cwd.pm"
                (("/bin/pwd")
-                (which "pwd")))
+                (which "pwd"))) ;TODO: fix cross-compile next rebuild cycle

and now fixed lateron

+                       ;;TODO: fix this in setup-configure next rebuild cycle
+                       (substitute* "dist/PathTools/Cwd.pm"
+                         (("/gnu/store/[^/]*-coreutils-[^/]*") coreutils))

Using this, I can cross-build perl and which allows me to ceate patches
to cross build, autoconf and automake that work to configure Guix git on
the Hurd.

Greetings,
janneke