Hello all, I'm sorry if this is a faq (it almost has to be) but I couldn't find anything in the signals documentation nor in the general build instruction. I've build the signals library using jam as described in the build instructions, I've added the resulting library to my linker list but then I get the errors below about several symbols being multiply defined. I'm using MSVC 7.0 (Visual Studio .Net, not .Net 2003). What do I do wrong? Thanks. cheers, roel ------ Build started: Project: boost_signaltest, Configuration: Debug Win32 ------ Linking... msvcprt.lib(MSVCP70.dll) : error LNK2005: "public: __thiscall std::basic_string::basic_string(class std::basic_string const &)" (??0?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@ABV01@@Z) already defined in boost_signaltest.obj msvcprt.lib(MSVCP70.dll) : error LNK2005: "public: __thiscall std::basic_string::~basic_string(void)" (??1?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@XZ) already defined in boost_signaltest.obj msvcprt.lib(MSVCP70.dll) : error LNK2005: "public: __thiscall std::basic_string::basic_string(char const *)" (??0?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@PBD@Z) already defined in boost_signaltest.obj MSVCRT.lib(MSVCR70.dll) : error LNK2005: "public: __thiscall exception::exception(void)" (??0exception@@QAE@XZ) already defined in LIBCD.lib(stdexcpt.obj) MSVCRT.lib(MSVCR70.dll) : error LNK2005: "public: virtual __thiscall exception::~exception(void)" (??1exception@@UAE@XZ) already defined in LIBCD.lib(stdexcpt.obj) MSVCRT.lib(MSVCR70.dll) : error LNK2005: "public: __thiscall exception::exception(class exception const &)" (??0exception@@QAE@ABV0@@Z) already defined in LIBCD.lib(stdexcpt.obj) MSVCRT.lib(MSVCR70.dll) : error LNK2005: "public: int __thiscall type_info::operator==(class type_info const &)const " (??8type_info@@QBEHABV0@@Z) already defined in LIBCD.lib(typinfo.obj) MSVCRT.lib(ti_inst.obj) : error LNK2005: "private: __thiscall type_info::type_info(class type_info const &)" (??0type_info@@AAE@ABV0@@Z) already defined in LIBCD.lib(typinfo.obj) MSVCRT.lib(ti_inst.obj) : error LNK2005: "private: class type_info & __thiscall type_info::operator=(class type_info const &)" (??4type_info@@AAEAAV0@ABV0@@Z) already defined in LIBCD.lib(typinfo.obj) LINK : warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library Debug/boost_signaltest.exe : fatal error LNK1169: one or more multiply defined symbols found Build log was saved at "file://c:\test\boost_signaltest\boost_signaltest\Debug\BuildLog.htm" boost_signaltest - 10 error(s), 1 warning(s) ---------------------- Done ---------------------- Build: 0 succeeded, 1 failed, 0 skipped -- Roel Vanhout - Programmer/Systems Administrator RIKS BV Papenstraat 8 - 6211 LG Maastricht Tel +31 (0)43 388 3708 - Fax +31 (0)43 325 3155