| ## Per subproject `default_library` option |
| |
| The `default_library` built-in option can now be defined per subproject. This is |
| useful for example when building shared libraries in the main project, but static |
| link a subproject. |
| |
| Most of the time this would be used either by the parent project by setting |
| subproject's default_options (e.g. `subproject('foo', default_options: 'default_library=static')`), |
| or by the user using the command line `-Dfoo:default_library=static`. |
| |
| The value is overriden in this order: |
| - Value from parent project |
| - Value from subproject's default_options if set |
| - Value from subproject() default_options if set |
| - Value from command line if set |
