Android NDK and pthread

POSIX threads (pthreads)

The android libc, bionic, provides built-in support for pthreads, so no additional linking (-lpthreads) is necessary. It does not implement full POSIX threads functionality and leaves out support for read/write locks, pthread_cancel(), process-shared mutexes and condition variables as well as other more advanced features. Read the bionic for more information.

TLS, thread-local storage, is limited to 59 slots available to applications, lower than the posix minimum of 128.