On Wed, 20 Jan 2016 16:50:03 +0100, Richard W.M. Jones wrote: > However on the same host if you do: > > dnf install gtk3-devel.i686 > > then there's a lot missing before you can compile a 32 bit Gtk3 > application[2]. There were always missing many %{?_isa} in BuildRequires, I was filing many of them, got some fixed. But now it is even forbidden to use them: https://fedoraproject.org/wiki/Packaging:Guidelines#BuildRequires_and_.25.7B_isa.7D IMO it is because it was causing more harm than good due to rpm/yum/dnf never properly supporting those: RFE: 'dnf builddep' should be able to extract the specfile from a .src.rpm and use it for the dependencies https://bugzilla.redhat.com/show_bug.cgi?id=1210276 IIUC Fedora gave up on multi-arch building and you should use mock for that, ISTM multi-arch is now officially supported only for installation. Jan -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx http://lists.fedoraproject.org/admin/lists/devel@xxxxxxxxxxxxxxxxxxxxxxx