POSIX threads and pthreads libraries

As of version 15.5, the thread-safe version of Open Client™ libraries are written using POSIX threads. All multithreaded libraries use the naming pattern *_r.a for static libraries or *_r.so for shared libraries. For multithreaded applications, use libraries with the “_r” suffix, such as libcs_r.a. For non-multithreaded applications, use libraries without the “_r” suffix, such as libcs.a.

See the Open Client and Open Server Programmers Supplement for UNIX for information about Open Client libraries.