building from source for different arch

[Lucio Crusca <lucio@sulweb.org>]

Hi, 

I'm trying to build opus package from source for both amd64 and i386, after 
having applied the patch by Pino Toscano I've found here:

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=674467

What I've done so far is:

  $ apt-get source opus
  # apt-get build-dep opus
  $ patch -Np1 < .../opus-multiarch.diff
  ...
  all ok
  $ dpkg-buildpackage
  ...
  all ok
  $ dpkg-buildpackage -ai386
  ...
  Can't exec "i486-linux-gnu-objcopy": No such file or directory at
  /usr/share/perl5/Debian/Debhelper/Dh_Lib.pm line 218.

And here I'm stuck. The missing file i486-linux-gnu-objcopy seems to belong to 
no package (http://packages.debian.org finds no packages containing files with 
similar names). However I'm not sure I've done things right, maybe I'm not 
supposed to build the 32bit package that way...

I'm running Jessie amd64.