Bug#349920: gpcl: FTBFS on amd64

[Roberto Pariset <robdebian@gmail.com>]

Package: gpcl
Version: 2.31-4
Severity: important
Justification: fails to build from source

Hi,
during configure I get:
[...]
checking whether gcc accepts -g... (cached) yes
checking host system type... Invalid configuration
`x86_64-unknown-linux-gnu': machine `x86_64-unknown' not recognized

checking build system type... Invalid configuration
`x86_64-unknown-linux-gnu': machine `x86_64-unknown' not recognized

checking for ranlib... (cached) ranlib
[...]
loading cache ./config.cache within ltconfig
ltconfig: you must specify a host type if you use `--no-verify'
Try `ltconfig --help' for more information.
configure: error: libtool configure failed
make: *** [build-stamp] Error 1

is this package not for amd64? If so, can you please add it to
Packages-arch-specific? Otherwise, would it be possible to fix it?
It actually prevents octave-gpc from building.

Thanks,
Roberto

-- System Information:
Debian Release: testing/unstable
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.15
Locale: LANG=it_IT.UTF-8@euro, LC_CTYPE=it_IT.UTF-8@euro (charmap=UTF-8) (ignored: LC_ALL set to it_IT.UTF-8@euro)