id summary reporter owner description type status milestone component version severity resolution keywords cc 11909 Bjam loses trailing dash sign in Cxxflags command line parameter Yuriy Martsynovskyy "Building boost on Windows with MSVC++ 2015 toolset using this command line: b2 -a --toolset=msvc-14.0 --build-type=complete --with-serialization --stagedir=stage stage cxxflags=/Zc:threadSafeInit- as a result, cl.exe actually gets called with /Zc:threadSafeInit parameter (trailing '-' is lost), which reverses the meaning of the flag I tried ""cxxflags=/Zc:threadSafeInit-"", cxxflags=""/Zc:threadSafeInit-"" with the same result" Bugs new To Be Determined Building Boost Boost 1.60.0 Problem