The Azure SDK team is pleased to make available the October 2020 client library release.


  • Azure Core
  • Azure IoT


  • Azure Core

Installation Instructions

To install any of our packages, copy and paste the following commands into a terminal:

git clone

git checkout <tag_name>


If you have a bug or feature request for one of the libraries, please post an issue to GitHub.


Azure Core Changelog

New Features

  • Added an az_log_classification_filter_fn callback function type along with a setter az_log_set_classification_filter_callback(), allowing the caller to filter log messages.

Bug Fixes

  • Fix bounds check while processing incomplete JSON string containing escaped characters to avoid out-of-range access.
  • Fix Windows to use /MT when building the CRT and static libraries.
  • Fail gracefully on invalid/incomplete HTTP response processing by avoiding reading from size 0 span.

Other Changes and Improvements

  • Add precondition check to validate clients are initialized before passed in to public APIs.
  • Add high-level and simplified az_core.h and az_iot.h files for simpler include experience for customers.

Latest Releases

View all the latest versions of C packages here.