"eric lin" <ericlin@xxxxxxxxxxxxx> writes: > I follow your hint, but after that I still get a lot compile error > ---------- > eric@eric-laptop:~/cppcookbook$ g++ -I/home/eric/boost1/boost_1_46_1/ example12-1.cpp > /tmp/ccd4Cx51.o: In function `main': > example12-1.cpp:(.text+0x30): undefined reference to `boost::thread::join()' These errors, from the linker, mean that you are not linking against the Boost library. You need to add something like -lboost with some -L option which points to the directory where libboost.so or libboost.a can be found. Ian