- The `BUILDOPT` Command:
  - The `BUILDOPT` command builds an option tree.
    - Individual option trees can provide their own `buildopt.mm` macro if they require special compilation steps. (This is rare.)
    - This is explained in detail in the `BUILDOPT;SYS` explain file.
  - In NeXtMidas, `BUILDOPT` is never called directly.
    - The `MAKE` command will call an option-tree specific `buildopt.mm` when required.

X-Midas Users Take Note:
The `BUILDOPT` command is the most common way of building option trees in X-Midas. This is because many X-Midas option trees require special compilation options. In general most NeXtMidas option trees do not require special compilation options unless they contain X-Midas host primitives that will be run from NeXtMidas.