This repository contain the gcc, which is adapted for https://github.com/zylin/zpu CPU, the worlds smallest 32 bit CPU with GCC toolchain.
The ZPU toolchain is too big to be hosted together with the HDL and the idea is that most HDL or normal users would not want to download and build their own toolchain.
git clone https://github.com/zylin/zpugcc.git
cd toolchain/toolchain
sh fixperm.sh
. env.sh
sh build.sh
tar -cjvf zpugcclinux_unstable.tar.bz2 install
Build a different version
git log => shows log entries
git checkout 322875263beccb1d75936bd1dd9150c1647dc9c0 => checkout a version
Note that build.sh is only present in the later versions, but that it should work fine for those versions in git where it is absent.
If you are having problems building with Cygwin, try erasing the entire c:\cygwin folder and try again.