Hi All, I have a warning when compiling some code using a condition variable (unused variable in boost/thread/pthread/condition_variable.hpp on line 53). It seems there is a patch for it but it has not been applied to 1.47.0 despite being quite old: https://svn.boost.org/trac/boost/attachment/ticket/4818/boost-thread-pthread... I have tested the patch it works for me (Ubuntu / GCC 4.5 / -Wall). Hoping this helps, Best regards, Julien