[Boost-users] Multiple link errors when using boost 1.44 boost::filesystem and gcc 4.1.2 on CentOS 5.5

I have installed gcc 4.1.2 (from Cent OS 5.5 repos), boost 1.44, and built all the libraries. I am able to link to all other libraries I try. As soon as I so much as add the include for boost::filesystem, and attempt to build my single .cpp file, I get the following errors: In function `__static_initialization_and_destruction_0(int, int)': testbuild.cpp:(.text+0xfa): undefined reference to `boost::system::generic_category()' testbuild.cpp:(.text+0x106): undefined reference to `boost::system::generic_category()' testbuild.cpp:(.text+0x112): undefined reference to `boost::system::system_category()' collect2: ld returned 1 exit status The linking stage fails and despite hours of googling I see no clear solution. I would be grateful for any advice on how to move past this, as it's the only thing holding me back from developing with boost. To be clear again, simply including is enough to cause this when performing a link against libboost_filesystem.a.