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Asked: 2026-06-02T19:12:56+00:00

How to create a simple project that would use compiled for VC staticaly linked

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How to create a simple project that would use compiled for VC staticaly linked boost (that is somewhhere like C:/boost)? How shall my project file look like?

I tried to add to .pro

INCLUDEPATH += C:/BOOST/include/boost-1_49
DEPENDPATH += C:/BOOST/lib
 LIBS += -LC:/BOOST/lib -llibboost_system-vc100-mt-sgd-1_49 -llibboost_thread-vc100-mt-sgd-1_49

but I get:

msvcprtd.lib(MSVCP100D.dll):-1: ERROR: LNK2005: "public: __thiscall std::_Container_base12::~_Container_base12(void)" (??1_Container_base12@std@@QAE@XZ) already defined in libboost_system-vc100-mt-sgd-1_49.lib(error_code.obj)

msvcprtd.lib(MSVCP100D.dll):-1: ERROR: LNK2005: "public: __thiscall std::_Container_base12::_Container_base12(void)" (??0_Container_base12@std@@QAE@XZ) already defined in libboost_system-vc100-mt-sgd-1_49.lib(error_code.obj)

msvcprtd.lib(MSVCP100D.dll):-1: ERROR: LNK2005: "public: void __thiscall std::_Container_base12::_Orphan_all(void)" (?_Orphan_all@_Container_base12@std@@QAEXXZ) already defined in libboost_system-vc100-mt-sgd-1_49.lib(error_code.obj)

:-1: WARNING: LNK4098: defaultlib 'LIBCMTD' conflicts with use of other libs; use /NODEFAULTLIB:library

debug\loader.exe:-1: ERROR: LNK1169: one or more multiply defined symbols found

when I try to compile something like:

#include <QtGui/QApplication>
#include <iostream>

#include <boost/filesystem.hpp>

int main(int argc, char *argv[])
{
    boost::filesystem::path p;
}

So I wonder how shall I change my .proo file to link correctly to static boost compiled for VC using Qt Creator that is using VS compiler?

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1 Answer

  1. Editorial Team

    If you built boost with the --runtime-link=static flag then they were compiled against the static CRT libraries, i.e. using the /MT (and /MTd for debug) compiler flags.

    Your errors suggest your project is trying to link with the dynamic CRT lib, i.e. using /MD and /MDd. If these are set in your .pro file, they will be a part of the QMAKE_CXXFLAGS_RELEASE and QMAKE_CXXFLAGS_DEBUG variables. They might however not be listed at all – I think the default is to use the dynamic CRT lib.

    All the libraries in your project need to link against the same CRT.

    You either need to use --runtime-link=shared when building boost (you can still use --link=static to create static boost libs with this option though), or add/change the /MD and /MDd to /MT and /MTd in your .pro file.

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