Hi all, I've got this really simple C++ program that's using the Boost.Filesystem library: #include <iostream> #include <boost/filesystem.hpp> int main() { boost::filesystem::path pathname = "/usr/local/bin"; std::cout << pathname.string() << std::endl; return 0; } It compiles fine, and I can get it to link to use the shared object: g++ -I/usr/local/include/boost-1_35 -o test test.cpp -lboost_filesystem-gcc42-mt-1_35 But I want to statically link instead. I've tried this and other similar combinations: g++ -I/usr/local/include/boost-1_35 -o test test.cpp -lboost_filesystem-gcc42-mt-s-1_35 -static -static-libgcc and I'm always getting these linker errors: /tmp/ccoiFv2v.o: In function `__static_initialization_and_destruction_0(int, int)': test.cpp:(.text+0x1dc): undefined reference to `boost::system::get_system_category()' test.cpp:(.text+0x1e6): undefined reference to `boost::system::get_posix_category()' test.cpp:(.text+0x1f0): undefined reference to `boost::system::get_posix_category()' test.cpp:(.text+0x1fa): undefined reference to `boost::system::get_system_category()' collect2: ld returned 1 exit status I've built Boost in full and have got these Boost.Filesystem libraries in /usr/local/lib: libboost_filesystem-gcc42-1_35.a libboost_filesystem-gcc42-1_35.so libboost_filesystem-gcc42-1_35.so.1.35.0 libboost_filesystem-gcc42.a libboost_filesystem-gcc42-d-1_35.a libboost_filesystem-gcc42-d-1_35.so libboost_filesystem-gcc42-d-1_35.so.1.35.0 libboost_filesystem-gcc42-d.a libboost_filesystem-gcc42-d.so libboost_filesystem-gcc42-mt-1_35.a libboost_filesystem-gcc42-mt-1_35.so libboost_filesystem-gcc42-mt-1_35.so.1.35.0 libboost_filesystem-gcc42-mt.a libboost_filesystem-gcc42-mt-d-1_35.a libboost_filesystem-gcc42-mt-d-1_35.so libboost_filesystem-gcc42-mt-d-1_35.so.1.35.0 libboost_filesystem-gcc42-mt-d.a libboost_filesystem-gcc42-mt-d.so libboost_filesystem-gcc42-mt-s-1_35.a libboost_filesystem-gcc42-mt-s.a libboost_filesystem-gcc42-mt-sd-1_35.a libboost_filesystem-gcc42-mt-sd.a libboost_filesystem-gcc42-mt.so libboost_filesystem-gcc42-s-1_35.a libboost_filesystem-gcc42-s.a libboost_filesystem-gcc42-sd-1_35.a libboost_filesystem-gcc42-sd.a libboost_filesystem-gcc42.so I hope someone can help me because I just can't see what I'm doing wrong! Graham