Hello, I can't link against the filesystem library. When I try to compile a program using boost::filesystem (like the simple one attached to this email), I get "undefined reference" errors from the linker: dourak@Vvardenfell:~$ g++ -o dummy dummy.cpp -lboost_filesystem -lboost_system /tmp/ccMpl6cj.o: In function `boost::filesystem::exists(boost::filesystem::path const&)': dummy.cpp:(.text._ZN5boost10filesystem6existsERKNS0_4pathE[boost::filesystem::exists(boost::filesystem::path const&)]+0x19): undefined reference to `boost::filesystem::detail::status(boost::filesystem::path const&, boost::system::error_code*)' /tmp/ccMpl6cj.o: In function `boost::filesystem::path::path(char* const&, boost::enable_if::type>, void>::type*)': dummy.cpp:(.text._ZN5boost10filesystem4pathC2IPcEERKT_PNS_9enable_ifINS0_11path_traits11is_pathableINS_5decayIS4_E4typeEEEvE4typeE[_ZN5boost10filesystem4pathC5IPcEERKT_PNS_9enable_ifINS0_11path_traits11is_pathableINS_5decayIS4_E4typeEEEvE4typeE]+0x22): undefined reference to `boost::filesystem::path::codecvt()' collect2: ld a retourné 1 code d'état d'exécution I carefully sorted the libraries in the command line, since gcc has trouble with library dependencies, sometimes, but it still doesn't work. I use gcc 4.6.3 on Ubuntu 12.04 64bits. The problem occurs either with boost 1.46.1 (taken from the repositories) or with 1.50.0 (installed with bjam). Any hint ? Thibaut Lepage