I'm in the process of evaluating Boost 1.36 as a potential upgrade from 1.35, in part to get the critical fixes to Boost.Thread. I've found, however, that something appears to have been broken with the library-level header and the way that it includes all the more-specific headers. My cursory search of the mailing list didn't reveal any previous reports; my apologies if I missed something. Here's my one-line test program: #include <boost/thread.hpp> This compiles cleanly using 1.35, but with 1.36 there are a number of errors related to condition_variable::wait and shared_mutex: In file included from /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/shared_mutex.hpp:16, from /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread.hpp:22, from 136.C:1: /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/shared_mutex.hpp: In member function 'void boost::shared_mutex::lock_shared()': /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/shared_mutex.hpp:64: error: no matching function for call to 'boost::condition_variable::wait(<unresolved overloaded function type>)' /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/condition_variable.hpp:17: note: candidates are: void boost::condition_variable::wait(boost::unique_lock<boost::mutex>&) /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/shared_mutex.hpp: In member function 'bool boost::shared_mutex::timed_lock_shared(const boost::system_time&)': /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/shared_mutex.hpp:91: error: no matching function for call to 'boost::condition_variable::timed_wait(<unresolved overloaded function type>, const boost::posix_time::ptime&)' /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/condition_variable.hpp:23: note: candidates are: bool boost::condition_variable::timed_wait(boost::unique_lock<boost::mutex>&, const boost::system_time&) /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/condition_variable_fwd.hpp:50: note: bool boost::condition_variable::timed_wait(boost::unique_lock<boost::mutex>&, const boost::xtime&) /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/shared_mutex.hpp: In member function 'void boost::shared_mutex::lock()': /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/shared_mutex.hpp:135: error: no matching function for call to 'boost::condition_variable::wait(<unresolved overloaded function type>)' /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/condition_variable.hpp:17: note: candidates are: void boost::condition_variable::wait(boost::unique_lock<boost::mutex>&) /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/shared_mutex.hpp: In member function 'bool boost::shared_mutex::timed_lock(const boost::system_time&)': /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/shared_mutex.hpp:148: error: no matching function for call to 'boost::condition_variable::timed_wait(<unresolved overloaded function type>, const boost::posix_time::ptime&)' /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/condition_variable.hpp:23: note: candidates are: bool boost::condition_variable::timed_wait(boost::unique_lock<boost::mutex>&, const boost::system_time&) /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/condition_variable_fwd.hpp:50: note: bool boost::condition_variable::timed_wait(boost::unique_lock<boost::mutex>&, const boost::xtime&) /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/shared_mutex.hpp: In member function 'void boost::shared_mutex::lock_upgrade()': /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/shared_mutex.hpp:199: error: no matching function for call to 'boost::condition_variable::wait(<unresolved overloaded function type>)' /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/condition_variable.hpp:17: note: candidates are: void boost::condition_variable::wait(boost::unique_lock<boost::mutex>&) /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/shared_mutex.hpp: In member function 'bool boost::shared_mutex::timed_lock_upgrade(const boost::system_time&)': /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/shared_mutex.hpp:211: error: no matching function for call to 'boost::condition_variable::timed_wait(<unresolved overloaded function type>, const boost::posix_time::ptime&)' /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/condition_variable.hpp:23: note: candidates are: bool boost::condition_variable::timed_wait(boost::unique_lock<boost::mutex>&, const boost::system_time&) /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/condition_variable_fwd.hpp:50: note: bool boost::condition_variable::timed_wait(boost::unique_lock<boost::mutex>&, const boost::xtime&) /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/shared_mutex.hpp: In member function 'void boost::shared_mutex::unlock_upgrade_and_lock()': /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/shared_mutex.hpp:266: error: no matching function for call to 'boost::condition_variable::wait(<unresolved overloaded function type>)' /mathworks/devel/sandbox/cnewbold/3rdp/3p/install/unknown/glnxa64/boost/include/boost-1_36/boost/thread/pthread/condition_variable.hpp:17: note: candidates are: void boost::condition_variable::wait(boost::unique_lock<boost::mutex>&) -Chris