2.2 Separate Compilation

Each of the units defined in the `Dependencies' file must use one of the four models for separate compilation supported by Mosmake.

2.2.1 The "simple" model		Just the `foo.sml' file
2.2.2 The "native" model		`foo.sml' + `foo.sig'
2.2.3 The "full" model		`foo.sml' + `foo-sig.sml' + `foo.sig'
2.2.4 The "hybrid" model		`foo.sml' + `foo-sig.sml'

2.2.5 How Mosmake finds out which model you use		How Mosmake finds out which model you use
2.2.6 The "smartmake" feature		Intelligenly avoid spurious recompilations