Re: Problem linking boost::threads using MSVC6 SP4

From: gunnarnl (gunnar_at_[hidden])
Date: 2002-03-20 15:46:59

Yes, thank you. This helped. I have also removed the 
BOOST_HAS_THREADS from my settings and it works fine. However, I have 
now of course a question regarding the multithreaded DLL. I normally 
compile using the pure multithreaded. What's the difference to the 
multithreaded DLL? How do I change the jam files so that I compile 
the boost library with the pure multithreaded. I have now only got 
the multithreaded DLL versions.

Maybe I should always use the multithreaded DLL as default.

Gunnar Olerud

--- In Boost-Users_at_y..., "bill_kempf" <williamkempf_at_h...> wrote:
> --- In Boost-Users_at_y..., "gunnarnl" <gunnar_at_m...> wrote:
> > I've created a windows console project with VC++ 6.0 and just 
used 
> > one of the examples in the documentation. I've also added the 
> > BOOST_HAS_THREADS macro in the settings. The program compiles 
well 
> in 
> > debug mode but gives the following linking errors:
> 
> You shouldn't add BOOST_HAS_THREADS.  This will be set for you by 
the 
> config headers if you've linked against the multi-threaded runtime 
> libraries.
> 
> > Compiling...
> > main.cpp
> > Linking...
> > msvcprtd.lib(MSVCP60D.dll) : error LNK2005: "public: virtual 
> > __thiscall std::runtime_error::~runtime_error(void)" (??
> > 1runtime_error_at_std@@UAE_at_XZ) already defined in main.obj
> > msvcprtd.lib(MSVCP60D.dll) : error LNK2005: "public: __thiscall 
> > std::runtime_error::runtime_error(class 
> runtime_error::runtime_error 
> > const &)" (??0runtime_error_at_std@@QAE_at_ABV01@@Z) already defined in 
> > main.obj
> > msvcprtd.lib(MSVCP60D.dll) : error LNK2005: "public: __thiscall 
> > std::basic_string<char,struct std::char_traits<char>,class 
> > std::allocator<char> >::~basic_string<char,struct 
> > std::char_traits<char>,class std::allocator<char> >(void)" (??1?
> > $basic_strin
> > g_at_DU?$char_traits_at_D@std@@V?$allocator_at_D@2@@std@@QAE_at_XZ) already 
> > defined in main.obj
> > msvcprtd.lib(MSVCP60D.dll) : error LNK2005: "public: __thiscall 
> > std::runtime_error::runtime_error(class 
> > runtime_error::basic_string<char,struct 
> std::char_traits<char>,class 
> > std::allocator<char> > const &)" (??0runtime_error_at_std@@QAE_at_ABV?
> > $basic_strin
> > g_at_DU?$char_traits_at_D@std@@V?$allocator_at_D@2@@1@@Z) already defined 
in 
> > libcpmtd.lib(ios.obj)
> > msvcprtd.lib(MSVCP60D.dll) : error LNK2005: "public: __thiscall 
> > std::basic_string<char,struct std::char_traits<char>,class 
> > std::allocator<char> >::basic_string<char,struct 
> > std::char_traits<char>,class std::allocator<char> >(char const 
> > *,class basic_
> > string<char,struct std::char_traits<char>,class 
> std::allocator<char> 
> > >::allocator<char> const &)" (??0?$basic_string_at_DU?
> > $char_traits_at_D@std@@V?$allocator_at_D@2@@std@@QAE_at_PBDABV?
> > $allocator_at_D@1@@Z) already defined in main.obj
> > LINK : warning LNK4098: defaultlib "MSVCRTD" conflicts with use 
of 
> > other libs; use /NODEFAULTLIB:library
> > Debug/threads.exe : fatal error LNK1169: one or more multiply 
> defined 
> > symbols found
> > Error executing link.exe.
> 
> Link errors like this are an indication that both the DLL and the 
LIB 
> version of the C RTL have been linked into your application.  If 
you 
> are using the last release of Boost Jam built only libraries that 
> link against the DLL version of the C RTL and you should do the 
same 
> in your application (Project | Settings | C/C++ | Code Generation | 
> Use run-time library | (Debug) Multithreaded DLL).  The current CVS 
> Jamfiles will build libraries that link against both the DLL and 
the 
> LIB version of the C RTL so you'll be able to choose which to link 
> against with your own applications, but you'll need to insure you 
> link against the correct libboost_thread.lib in that case.
> 
> > Any help on this would be appreciated.
> 
> Hope that helped.
> 
> Bill Kempf