pub const DLL_PREFIX: &str;
Specifies the filename prefix used for shared libraries on this platform. Example value is lib.
Some possible values:
"" (an empty string)
    © 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
    https://doc.rust-lang.org/std/env/consts/constant.DLL_PREFIX.html