We currently do not have a well-defined means in SConstruct to detect whether an Enterprise build is requested. We do the detection in a couple of places, but the results of that detection are not available outside of those locations.

This caused some problems in SERVER-48291 when it was discovered that Windows Enterprise builds must use a dynamic CRT to work properly. Ideally, we would be able to detect any time we're using external DLLs on platforms that require a dynamic CRT (such as Windows) to use them and then configure the build accordingly.