(Reading database ... 342705 files and directories currently installed.)
Preparing to unpack .../libc6-dev-i386_2.19-0ubuntu6.3_amd64.deb ...
Unpacking libc6-dev-i386 (2.19-0ubuntu6.3) ...
dpkg: error processing archive /var/cache/apt/archives/libc6-dev-i386_2.19-0ubuntu6.3_amd64.deb (--unpack):
 trying to overwrite '/usr/include/gnu', which is also in package libc6-dev-amd64 2.19-0ubuntu6.3
Errors were encountered while processing:
 /var/cache/apt/archives/libc6-dev-i386_2.19-0ubuntu6.3_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)