RTSDK C/C++ Installation Guide : 5 Package Directory Changes : 5.4 Starting in Version 2.2.1
 
5.4 Starting in Version 2.2.1
Starting from version 2.2.1.L1, the RTSDK source code with sample applications (examples) and the closed-source binary pack are provided in separate packages:
RTSDK RRG package
RTSDK BinaryPack RRG package
The BinaryPack RRG package is not platform specific and has content for all flavors and platforms of RTSDK APIs.
Also, with version 2.2.1, you can build an OptimizedDebug version on Linux platforms. For more information, see Section 4.2.