I've put binary packages of the OpenBSD port of gcc/gnat in ftp://quatramaran.ens.fr/pub/espie/i386/ in case anyone wants to rebuild gnat on openbsd-current on i386 (or possibly try his hand at building crosses). They are OpenBSD packages, taken from our ports tree. Refer to OpenBSD documentation on the web site or pkg_add(1), if needed.