RTSDK C/C++ Installation Guide : 5 Package Directory Changes : 5.2 Starting in Version 1.3.1
 
5.2 Starting in Version 1.3.1
Starting in version 1.3.1, ANSI is open-sourced:
The ANSI library is located in Cpp-C/Eta/Libs.
ANSI headers are located in Cpp-C/Eta/Include/ansi.