Background & Motivation

libmongocrypt depends on libbson. By default libmongocrypt statically links libbson.

libmongoc has an optional dependency on libmongocrypt.

This creates an awkward dependency. mongodb/mongo-c-driver repository contains the source for libbson and libmongoc.

In the C driver Evergreen, to build libmongoc with CSFLE support from source, the debug-compile-*-cse tasks do the following:

• Build libbson only.
• Build libmongocrypt using that built version of libbson.
• Build libmongoc using the built libmongocrypt.

Scope
Vendor libbson into a subdirectory in the libmongocrypt project.