Hello, I'm trying to use the filesystem libraries provided by Boost (1.35) through "boost/filesystem.hpp". I've installed Boost via macports and checked whether or not the installation is up to date, which it is. Moreover, I can use (some) other Boost libraries just fine, but not the abovementioned one. I'm using the following code to access several libraries: ----SNIP---- #include <boost/regex.hpp> #include <boost/signals.hpp> #include <boost/system/error_code.hpp> #include <boost/filesystem.hpp> ---/SNIP---- Including any of the first three libraries works just fine and results in a successful build. However, adding the fourth results in: ----SNIP---- Undefined symbols: "boost::system::get_posix_category()", referenced from: __static_initialization_and_destruction_0(int, int)in test.o __static_initialization_and_destruction_0(int, int)in test.o "boost::system::get_system_category()", referenced from: __static_initialization_and_destruction_0(int, int)in test.o __static_initialization_and_destruction_0(int, int)in test.o ---/SNIP--- Can anybody point me to a solution for this issue? I really prefer using the existing functionality from Boost over wirting them myself... Thanks in advance. Kind regards, Frank -------------------- Frank van Meurs Dept. of Information and Computer Sciences, Utrecht University Padualaan 14, 3584 CH Utrecht, The Netherlands P: +31 (0)30 - 253 9128 F: +31 (0)30 - 253 4619 W: http://www.cs.uu.nl/staff/fvm.html