| ## Machine objects get `kernel` and `subsystem` properties |
| |
| Meson has traditionally provided a `system` property to detect the |
| system being run on. However this is not enough to reliably |
| differentiate between e.g. an iOS platform from a watchOS one. Two new |
| properties, namely `kernel` and `subsystem` have been added so these |
| setups can be reliably detected. |
| |
| These new properties are not necessary in cross files for now, but if |
| they are not defined and a build file tries to access them, Meson will |
| exit with a hard error. It is expected that at some point in the |
| future defining the new properties will become mandatory. |
