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06c23954e6
Details: - Expanded the bli_pthread_*() -> pthread_*() wrappers in frame/thread/bli_pthread.c to include cases for Windows taken from frame/base/bli_pthread_wrap.c. Now, bli_thread_*() is always defined and always used by BLIS and the BLIS testsuite (in lieu of calling pthreads directly, as before). The implementation used in this new API depends on whether we are building for Windows, and to a lesser extent, whether we are building on OS X. For the core API, Windows uses Windows threads, non-Windows (Linux, OS X) uses pthreads. OS X and Windows get barriers implemented in terms of other bli_pthread_*() functions, and Linux gets barriers implemented in terms of pthread_barrier*(). This commit addresses issue #273. - Fixed a bug in the Linux definition of bli_pthread_mutex_unlock(), which was erroneously calling pthread_mutex_lock(). - Minor changes to configure so that the auto-detection executable can be built given the above changes (most notably, turning on POSIX extensions via -D_GNU_SOURCE). - Removed temporary play-test code for shiftd that accidentally got committed into test/3m4m/test_gemm.c.