While investigating SERVER-63400, we discovered that using SCons.Object to create an object file and then using it as a source file in a builder has a different result than letting SCons chain builders on its own. Specifically, the resulting binary worked with SCons.Object but produced this error when using standard chained builders:

Attempt to add global initializer failed, status: CannotMutateObject: Initializer dependency graph is frozen
[1]    14751 abort (core dumped)  build/install/bin/mongo_csfle_shlib_test

We should investigate why this is happening and determine whether it's a problem to be fixed or is simply behavior to be documented.