Mike Feldmeier wrote: [ Ben Hutchings wrote:]

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Mike Feldmeier wrote: <snip>

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This consistently produces the linking error:

converter.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall boost::thread::thread( class boost::function0 const &)" (__imp_??0thread@boost@@QAE@ABV?$function0@XV?$allocator@Vfunction _base@boost@@@_STL@@@1@@Z) referenced in function "public: void __thiscall mytest::test::converter::run(void)" (?run@converter@test@mytest@@QAEXXZ)

I think you aren't linking with the thread library. <snip> I'm using Visual C++ 7.1, but using straight C++, no .NET. I've defined the addtional library path (C:\boost\lib) and tried linking (in the additional dependencies) with boost_thread-vc71-mt-gdp-1_31.lib, boost_thread-vc71-mt-gdp.lib, boost_thread-vc71-mt-p-1_31.lib, and boost_thread-vc71-mt-p.lib (one at a time, of course), but I get the same error message with all of them. <snip>

I've worked it out now. In your main program you are using STLport - notice the "_STL" namespace instead of "std" but Boost.Thread is built with the library that comes with VC++ 7.1, which of course uses the "std" namespace. Unless STLport has some specific feature that you need I suggest you use the standard library that comes with VC++ 7.1; it's a very good implementation. If you must use STLport then you need to build Boost.Thread (and any other libraries with which you share standard library types) using it.