Why cant apt-get install the i386 version of libpcap-dev?
$ sudo apt-get install libpcap-dev:i386 Reading package lists... Done Building dependency tree Reading state information... Done Package libpcap-dev:i386 is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'libpcap-dev:i386' has no installation candidate
However, the package clearly exists:
https://launchpad.net/ubuntu/trusty/i386/libpcap-dev. I'm on Ubuntu 14.04 x64.