CGAL users discussion list

["Laurent Rineau (CGAL/GeometryFactory)" <>]

Le mercredi 23 janvier 2013 16:01:14 Rhys D a écrit :
> Hi,
> 
> I have just started with CGAL and can't get any of the demos to compile.
> 
> I am using Boost 1.51
> 
> Here is the verbose VC++ error
> You can see that it is searching in what seems to me to be the correct lib
> file but is still failing.
> 
> My environment:
> 
> Windows 7 x64
> Visual Studio 2010
> Boost 1.51 - 64 downloaded from here: http://www.boostpro.com/download/
> CGAL-4.1
> 
> I have reinstalled everything from scratch but still keep coming up against
> the same error.
> I am building Release x64. at all steps I have chosen
> 
> Any ideas?
> 
> Rhys.
> 
> ==============================
> 
> 1>      Searching
> C:\dev\CGAL-4.1-static\CGAL-4.1\build\lib\Release\CGAL-vc100-mt-4.1.lib:
> 1>      Searching C:\dev\boost_1_51\lib\libboost_thread-vc100-mt-1_51.lib:
> 1>      Searching C:\dev\boost_1_51\lib\libboost_system-vc100-mt-1_51.lib:
> 1>      Searching
> C:\dev\boost_1_51\lib\libboost_date_time-vc100-mt-1_51.lib:
> 1>      Searching C:\dev\boost_1_51\lib\libboost_chrono-vc100-mt-1_51.lib:
> 1>      Searching C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\lib\amd64\MSVCRT.lib:
> 1>      Searching C:\Program Files (x86)\Microsoft Visual Studio
> 10.0\VC\lib\amd64\OLDNAMES.lib:
> 1>
> 1>  Finished searching libraries
> 1>
> 1>  Finished pass 1
> 1>
> 1>nntest.obj : error LNK2001: unresolved external symbol "class
> boost::system::error_category const & __cdecl
> boost::system::system_category(void)" (?system_category@system@boost@
> @YAAEBVerror_category@12@XZ)
> 1>nntest.obj : error LNK2001: unresolved external symbol "class
> boost::system::error_category const & __cdecl
> boost::system::generic_category(void)" (?generic_category@system@boost@
> @YAAEBVerror_category@12@XZ)
> 1>C:\dev\tests\cgal_nn_test\nntest\x64\Release\nntest.exe : fatal error
> LNK1120: 2 unresolved externals
> 1>

When you configured the compilation of CGAL libraries, have you turned the 
CMake variable CGAL_Boost_USE_STATIC_LIBS to OFF?

It seems that in your build of "nntest.exe", you are linking with the static 
version of the Boost libraries, whereas the CGAL libraries are linked by 
default with the DLL versions of Boost libraries.

-- 
Laurent Rineau, PhD
R&D Engineer at GeometryFactory           http://www.geometryfactory.com/
Release Manager of the CGAL Project       http://www.cgal.org/