A few people have pointed out to me that the ZPU toolchain is becoming more difficult to build as time goes on. It’s based around a specific version of GCC and hasn’t been updated in a while, so while technologies used in the build process move on and the incompatibilities that creep in are fixed in the GCC mainline, the ZPU toolchain is left out in the cold.
In an attempt to halt the bitrot, I’ve updated the patch on my “Setting Up the Toolchain” post, which while being workaround-laden rather than an actual fix, should render the toolchain buildable on a more modern Linux distro.