Alain,

It looks like VS cannot find the regex library. 
You must tell VS where to find it. 
Project -> Properties -> Linker -> General and additional libraries directories
Also you must add the regex library 
Project -> Properties -> Linker -> Input.

Last but not least, make sure that your lib is 64 bits.
Cheers

On Wed, Feb 6, 2013 at 9:56 PM, Alain Leblanc <aalebl@gmail.com> wrote:
Hi,

I'm having some issues linking my code with the 64-bit version of boost 1.51 on windows with VC 10. I managed to write this small example that illustrates my problem. It is a project to create a DLL. I downloaded from boostpro.com.


Here's the code:

#include <boost/regex.hpp>
#include <boost/filesystem.hpp>


void useBoost() {

}

and the result.

------ Build started: Project: test-64, Configuration: Release x64 ------
  UsesRegex.cpp
UsesRegex.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)
UsesRegex.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)
C:\Users\aleblanc\projects\trunk\XDE\sandbox\alain\c-testing\test-64\x64\Release\test-64.dll : fatal error LNK1120: 2 unresolved externals
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========



However, if I comment out the include for filesystem.hpp it compiles ok. I have included the path to the boost libraries in the 'Additional Library Directories' property for the linker. otherwise it complains about not finding the library for boost_regex. Compiling for 32 bit (with the path for the libraries to a 32-bit installation of boost) works fine.

Any suggestion would be appreciated.

Thanks,

a


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