Boost C++ Libraries: Ticket #7184: atomic_cas32() uses Linux-only compiler intrinsic https://svn.boost.org/trac10/ticket/7184 <p> atomic_cas32() incorrectly assumes _sync_val_compare_and_swap() intrinsic is available on any host OS using GCC4.1+ when, as of GCC4.4, it is only available on Linux. This renders it unportable. </p> <p> Problem was observed on QNX Neutrino 6.5.0. </p> en-us Boost C++ Libraries /htdocs/site/boost.png https://svn.boost.org/trac10/ticket/7184 Trac 1.4.3