[boost] [log] Build fail : log (1.44.0) on vc 11 using cxxflags=-Zc:wchar_t-

Hi All, I need use cxxflags=-Zc:wchar_t-, because I will use boost with my QT project! I build boost like this (debug in this case): bjam toolset=msvc-11.0 variant=debug threading=multi link=shared cxxflags=-Zc:wchar_t- But log lib fail with this: call "C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\vcvarsall.bat" x86 >nul cl /Zm800 -nologo @"..\..\..\bin.v2\libs\log\build\msvc-11.0\debug\threading-mul ti\formatter_parser.obj.rsp" ...failed compile-c-c++ ..\..\..\bin.v2\libs\log\build\msvc-11.0\debug\threading -multi\formatter_parser.obj... ...skipped boos t_log_setup-vc110-mt-gd-1_54.dll for lack of boost_log-vc110-mt-gd-1_54.lib... ...skipped boos t_log_setup-vc110-mt-gd-1_54.lib for lack of boost_log-vc110-mt-gd-1_54.lib... ...skipped boos t_log_setup-vc110-mt-gd-1_54.pdb for lack of boost_log-vc110-mt-gd-1_54.lib... ...failed updating 4 targets... ...skipped 6 targets... Anyone can helpeme? Thanks