usr/bin/ld: /tmp/cc0BvY7L.o: in function boost::asio::detail::posix_event::posix_event()':
main.cpp:(.text._ZN5boost4asio6detail11posix_eventC2Ev[_ZN5boost4asio6detail11posix_eventC5Ev]+0x51): undefined reference topthread_condattr_setclock’
/usr/bin/ld: /tmp/cc0BvY7L.o: in function boost::asio::detail::posix_thread::~posix_thread()':
main.cpp:(.text._ZN5boost4asio6detail12posix_threadD2Ev[_ZN5boost4asio6detail12posix_threadD5Ev]+0x2a): undefined reference topthread_detach’
/usr/bin/ld: /tmp/cc0BvY7L.o: in function boost::asio::detail::posix_thread::join()':
main.cpp:(.text._ZN5boost4asio6detail12posix_thread4joinEv[_ZN5boost4asio6detail12posix_thread4joinEv]+0x2f): undefined reference topthread_join’
/usr/bin/ld: /tmp/cc0BvY7L.o: in function boost::asio::detail::posix_thread::start_thread(boost::asio::detail::posix_thread::func_base*)':
main.cpp:(.text._ZN5boost4asio6detail12posix_thread12start_threadEPNS2_9func_baseE[_ZN5boost4asio6detail12posix_thread12start_threadEPNS2_9func_baseE]+0x3e): undefined reference topthread_create’
/usr/bin/ld: /tmp/cc0BvY7L.o: in function boost::asio::detail::posix_signal_blocker::posix_signal_blocker()':
main.cpp:(.text._ZN5boost4asio6detail20posix_signal_blockerC2Ev[_ZN5boost4asio6detail20posix_signal_blockerC5Ev]+0x68): undefined reference topthread_sigmask’
/usr/bin/ld: /tmp/cc0BvY7L.o: in function boost::asio::detail::posix_signal_blocker::~posix_signal_blocker()':
main.cpp:(.text._ZN5boost4asio6detail20posix_signal_blockerD2Ev[_ZN5boost4asio6detail20posix_signal_blockerD5Ev]+0x31): undefined reference topthread_sigmask’
collect2: error: ld returned 1 exit status
