Announcing 2.2.0 of libbson and libmongoc, the libraries constituting the MongoDB C Driver.

libbson

Improvements

• Increase resolution of bson_get_monotonic_time on Windows.

Deprecated

• Support for macOS 11 (EOL since September 2023) and macOS 12 (EOL since September 2024).

Removed

• Support for Visual Studio 2015 (EOL since October 2025). Use Visual Studio 2017 or newer.

libmongoc

New Features

• MONGODB-OIDC authentication mechanism.
  • Support a custom callback with mongoc_client_set_oidc_callback and mongoc_client_pool_set_oidc_callback.
  • Support Azure environment with property environment:azure.
  • Support GCP environment with property environment:gcp.
  • Kubernetes environment is not-yet supported.
• Add features to mongoc_bulkwrite_t:
  • Add mongoc_bulkwrite_is_acknowledged.