Alternate Threads Library

The Solaris 8 release introduced an alternate threads library implementation that is located in the directories /usr/lib/lwp (32-bit) and /usr/lib/lwp/64 (64-bit). In the Solaris 9 release, this implementation became the standard threads implementation found in /usr/lib and /usr/lib/64. Effective with the Solaris 10 release, all threads functionality has been moved into libc and no separate threads library is required. The /usr/lib/lwp directories are maintained for compatibility of Solaris 8 applications.