Boost linker error: Unresolved external symbol "class boost::system::error_category const & __cdecl boost::system::get_system_category(void)"

I solved the problem. I had built 32-bit libraries when I had intended to build 64-bit libraries. I fixed up my build statement, and built 64-bit libraries, and now it works.

Here is my bjam command line:

C:\Program Files (x86)\boost\boost_1_38>bjam --build-dir=c:\boost --build-type=complete --toolset=msvc-9.0 address-model=64 architecture=x86 --with-system

#include <boost/system/config.hpp>

In my case, BOOST_LIB_DIAGNOSTIC did not show system being automatically linked in. I resolved this by simply including boost/system/config.hpp.