working .config for nios2?

After a lot of experimenting, I managed to generate .config files that resulted in the successful build of i586 and i486 targets (including the linux kernel). Now I seem to be stuck trying to build for a nios2 target. If I try using the uclibc snapshot, it gets stuck trying to build for the various elf, flat, etc options (all four options fail). If I try using an earlier version of uclibc, it tries to use nios2-elf-gcc (which doesn't exist) instead of nios2-linux-uclibc-gcc (which does exist). I tried using various versions of gcc and both of the supported 2.6.x kernel versions. I also tried both a few-days-old version of BuildRoot and the latest snapshot, with those various permutations of config items. I'm running out of ideas. Does anyone have a working .config for nios2?

Jim Henrickson