RE: [Boost-users] boost 1.30 / date_time / link problem with VC7

From: Ben Hutchings (ben.hutchings_at_[hidden])
Date: 2004-05-10 09:41:54

Dan Dimerman <dan_dimerman_at_[hidden]> wrote:
> I'm having the following problem when linking a MSWindows MFC 
> application with the static library libboost_date_time.lib using
> DevStudio .Net 7.0.
>
> The output looks like this:
>
> ------ Build started: Project: Main, Configuration: Debug Win32 ------
> Linking...
> MSVCRTD.lib(ti_inst.obj) : error LNK2005: "private: __thiscall
> type_info::type_info(class type_info const &)"
> (??0type_info@@AAE_at_ABV0@@Z) already defined in
libcmtd.lib(typinfo.obj)
> MSVCRTD.lib(ti_inst.obj) : error LNK2005: "private: class type_info &
> __thiscall type_info::operator=(class type_info const &)"
> (??4type_info@@AAEAAV0_at_ABV0@@Z) already defined in
> libcmtd.lib(typinfo.obj)
> LINK : warning LNK4098: defaultlib 'MSVCRTD' conflicts with 
> use of other libs; use /NODEFAULTLIB:library
> Debug/Main.exe : fatal error LNK1169: one or more multiply 
> defined symbols found
> 
> I am working with the "Multi-threaded Debug (/MTd)" version of
> libraries.
> Tried using alternatives, but I got errors elsewhere and the 
> errors above persisted.
> From boost, I am using the library built at "My Documents\Visual
> Studio Projects\boost\libs\date_time\build\bin\libboost_date_time.lib
> \vc7\debug\runtime-link-dynamic"
> 
> Any help will be greatly appreciated...

You are using the debug DLL version of the date_time library.  In order
to share a heap with the main program this uses the debug DLL version
of the C++ run-time library (MSVCRTD) and requires that the main
program uses it too.  You must either:

(1) Build and use the debug multi-threaded static version of the
    date_time library.
(2) Use the debug DLL versions of the C++ run-time library and MFC
    in your main program.