| ## Add `optimization` `plain` option | |
| The `optimization` built-in option now accepts `plain` value, | |
| which will not set any optimization flags. This is now the default | |
| value of the flag for `buildtype=plain`, which is useful for distros, | |
| that set the optimization and hardening flags by other means. | |
| If you are using the value of `get_option('optimization')` in your | |
| Meson scripts, make sure you are not making assumptions about it, | |
| such as that the value can be passed to a compiler in `-O` flag. |