The software described in this documentation is either in Extended Support or Sustaining Support. See https://www.oracle.com/us/support/library/enterprise-linux-support-policies-069172.pdf for more information.
Oracle recommends that you upgrade the software described by this documentation as soon as possible.

5.1 POSIX Compliance

The POSIX.1c threads extensions standard (IEEE Std 1003.1c-1995) defines APIs for creating and manipulating threads. POSIX threads, Pthreads, is a POSIX standard for threads. POSIX.1 specifies a set of interfaces, including functions and header files, for threaded programming. Both Oracle Solaris Studio and the GNU compilers support the POSIX threads programming model.