- A C99 compiler.
- [libzstd](https://www.zstd.net). If you don't have libzstd installed and
can't or don't want to install it on your system, you can pass
- `-DZSTD_FROM_INTERNET=ON` to cmake, which will download libzstd from
- the Internet and unpack it in the local binary tree.
- ccache will then be linked statically to the locally built libzstd.
+ `-DZSTD_FROM_INTERNET=ON` to cmake to make it download libzstd from the
+ Internet and unpack it in the local binary tree. ccache will then be linked
+ statically to the locally built libzstd.
Optional: