Thanks your reply, but how to (link against the boost filesystem & system lib)? I am on linux/g++ these are errors I got, after I eliminate native ---------------- eric@eric-laptop:~/cppcookbook/ch10$ g++ -lboost_system Example10-10.cpp /tmp/ccF2cJsO.o: In function `boost::filesystem3::path::codecvt()': Example10-10.cpp:(.text._ZN5boost11filesystem34path7codecvtEv[boost::filesystem3::path::codecvt()]+0x7): undefined reference to `boost::filesystem3::path::wchar_t_codecvt_facet()' /tmp/ccF2cJsO.o: In function `boost::filesystem3::complete(boost::filesystem3::path const&)': Example10-10.cpp:(.text._ZN5boost11filesystem38completeERKNS0_4pathE[boost::filesystem3::complete(boost::filesystem3::path const&)]+0x2d): undefined reference to `boost::filesystem3::absolute(boost::filesystem3::path const&, boost::filesystem3::path const&)' /tmp/ccF2cJsO.o: In function `boost::filesystem3::copy_file(boost::filesystem3::path const&, boost::filesystem3::path const&)': Example10-10.cpp:(.text._ZN5boost11filesystem39copy_fileERKNS0_4pathES3_[boost::filesystem3::copy_file(boost::filesystem3::path const&, boost::filesystem3::path const&)]+0x24): undefined reference to `boost::filesystem3::detail::copy_file(boost::filesystem3::path const&, boost::filesystem3::path const&, boost::filesystem3::copy_option::enum_type, boost::system::error_code*)' /tmp/ccF2cJsO.o: In function `boost::filesystem3::initial_path()': Example10-10.cpp:(.text._ZN5boost11filesystem312initial_pathEv[boost::filesystem3::initial_path()]+0x18): undefined reference to `boost::filesystem3::detail::initial_path(boost::system::error_code*)' collect2: ld returned 1 exit status eric@eric-laptop:~/cppcookbook/ch10$ ------------------- looking to see any expert's help again and thank a lot in advance, Eric
You need to link to Boost.Filesystem as well as Boost.System. That is, in addition to -lboost_system, you should be passing -lboost_filesystem to the compiler. Regards, Nate.