Hi folks, I have: installed eclipse on ubuntu 10.10 installed libbost 1.4 using sinaptic pkg manager started a simple new c++ project, #include <boost/thread.hpp> int main(int argc, char* arg[]){ } I tried to build it, and had the error: Invoking: GCC C++ Compiler g++ -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"main.d" -MT"main.d" -o"main.o" "../main.cpp" In file included from /usr/include/boost/thread/detail/platform.hpp:17, from /usr/include/boost/thread/thread.hpp:12, from /usr/include/boost/thread.hpp:13, from ../main.cpp:8: /usr/include/boost/config/requires_threads.hpp:47: error: #error "Compiler threading support is not turned on. Please set the correct command line options for threading: -pthread (Linux), -pthreads (Solaris) or -mthreads (Mingw32)" In file included from /usr/include/boost/thread/thread.hpp:12, from /usr/include/boost/thread.hpp:13, from ../main.cpp:8: /usr/include/boost/thread/detail/platform.hpp:67: error: #error "Sorry, no boost threads are available for this platform." In file included from /usr/include/boost/thread.hpp:13, from ../main.cpp:8: /usr/include/boost/thread/thread.hpp:19: error: #error "Boost threads unavailable on this platform" blablabla...so on... a lot more errors. what am I missing here? I dont understand the error message, and tried to write -pthread wherever I could, but did not work. Any tips? detailed or stepbystep solution please, because I am a beginner, and dont understand chinese:) thank you guys