Hello,

I am currently installing Orocos OCL.

While running 'make', I get errors while linking 'helloworld'.

/usr/local/orocos/lib/liborocos-rtt.a(._corelib_activities_TimerOneShot.o)(.text+0x56): In function `RTT::detail::TimerOneShot::TimerOneShot[not-in-charge](long long)':
: undefined reference to `pthread_mutexattr_init'
/usr/local/orocos/lib/liborocos-rtt.a(._corelib_activities_TimerOneShot.o)(.text+0x60): In function `RTT::detail::TimerOneShot::TimerOneShot[not-in-charge](long long)':
: undefined reference to `pthread_mutexattr_settype'
/usr/local/orocos/lib/liborocos-rtt.a(._corelib_activities_TimerOneShot.o)(.text+0x146): In function `RTT::detail::TimerOneShot::TimerOneShot[in-charge](long long)':
: undefined reference to `pthread_mutexattr_init'
/usr/local/orocos/lib/liborocos-rtt.a(._corelib_activities_TimerOneShot.o)(.text+0x150): In function `RTT::detail::TimerOneShot::TimerOneShot[in-charge](long long)':
: undefined reference to `pthread_mutexattr_settype'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x8f): In function `RTT::OS::periodicThread(void*)':
: undefined reference to `sem_post'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x9a): In function `RTT::OS::periodicThread(void*)':
: undefined reference to `sem_wait'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0xcd): In function `RTT::OS::periodicThread(void*)':
: undefined reference to `sem_post'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x40d): In function `RTT::OS::PeriodicThread::PeriodicThread[not-in-charge](int, std::basic_string, std::allocator > const&, double, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_init'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x47e): In function `RTT::OS::PeriodicThread::PeriodicThread[not-in-charge](int, std::basic_string, std::allocator > const&, double, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x4bd): In function `RTT::OS::PeriodicThread::PeriodicThread[not-in-charge](int, std::basic_string, std::allocator > const&, double, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_init'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x52e): In function `RTT::OS::PeriodicThread::PeriodicThread[not-in-charge](int, std::basic_string, std::allocator > const&, double, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x644): In function `RTT::OS::PeriodicThread::PeriodicThread[not-in-charge](int, std::basic_string, std::allocator > const&, double, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x64e): In function `RTT::OS::PeriodicThread::PeriodicThread[not-in-charge](int, std::basic_string, std::allocator > const&, double, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x688): In function `RTT::OS::PeriodicThread::PeriodicThread[not-in-charge](int, std::basic_string, std::allocator > const&, double, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_wait'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x7dd): In function `RTT::OS::PeriodicThread::PeriodicThread[in-charge](int, std::basic_string, std::allocator > const&, double, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_init'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x84e): In function `RTT::OS::PeriodicThread::PeriodicThread[in-charge](int, std::basic_string, std::allocator > const&, double, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x88d): In function `RTT::OS::PeriodicThread::PeriodicThread[in-charge](int, std::basic_string, std::allocator > const&, double, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_init'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x8fe): In function `RTT::OS::PeriodicThread::PeriodicThread[in-charge](int, std::basic_string, std::allocator > const&, double, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0xa14): In function `RTT::OS::PeriodicThread::PeriodicThread[in-charge](int, std::basic_string, std::allocator > const&, double, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0xa1e): In function `RTT::OS::PeriodicThread::PeriodicThread[in-charge](int, std::basic_string, std::allocator > const&, double, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0xa58): In function `RTT::OS::PeriodicThread::PeriodicThread[in-charge](int, std::basic_string, std::allocator > const&, double, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_wait'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0xbfa): In function `RTT::OS::PeriodicThread::~PeriodicThread [not-in-charge]()':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0xc05): In function `RTT::OS::PeriodicThread::~PeriodicThread [not-in-charge]()':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0xd0a): In function `RTT::OS::PeriodicThread::~PeriodicThread [in-charge]()':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0xd15): In function `RTT::OS::PeriodicThread::~PeriodicThread [in-charge]()':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0xe1a): In function `RTT::OS::PeriodicThread::~PeriodicThread [in-charge deleting]()':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0xe25): more undefined references to `sem_destroy' follow
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0xffc): In function `RTT::OS::PeriodicThread::start()':
: undefined reference to `sem_trywait'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x1057): In function `RTT::OS::PeriodicThread::start()':
: undefined reference to `sem_post'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x11c8): In function `RTT::OS::PeriodicThread::stop()':
: undefined reference to `sem_trywait'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x1228): In function `RTT::OS::PeriodicThread::stop()':
: undefined reference to `sem_trywait'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x1450): In function `RTT::OS::PeriodicThread::setScheduler(int)':
: undefined reference to `sem_post'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x145b): In function `RTT::OS::PeriodicThread::setScheduler(int)':
: undefined reference to `sem_wait'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x186a): In function `RTT::OS::PeriodicThread::setPeriod(double)':
: undefined reference to `sem_post'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x1875): In function `RTT::OS::PeriodicThread::setPeriod(double)':
: undefined reference to `sem_wait'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x18f4): In function `RTT::OS::PeriodicThread::setPeriod(long, long long)':
: undefined reference to `sem_post'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x18ff): In function `RTT::OS::PeriodicThread::setPeriod(long, long long)':
: undefined reference to `sem_wait'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x1aac): In function `RTT::OS::PeriodicThread::terminate()':
: undefined reference to `sem_post'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_PeriodicThread.o)(.text+0x1ab7): In function `RTT::OS::PeriodicThread::terminate()':
: undefined reference to `sem_wait'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0x97): In function `RTT::OS::singleThread_f(void*)':: undefined reference to `sem_post'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0xb0): In function `RTT::OS::singleThread_f(void*)':: undefined reference to `sem_wait'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0x15b): In function `RTT::OS::singleThread_f(void*)':
: undefined reference to `sem_post'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0x2fb): In function `RTT::OS::SingleThread::SingleThread[not-in-charge](int, std::basic_string, std::allocator > const&, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_init'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0x30e): In function `RTT::OS::SingleThread::SingleThread[not-in-charge](int, std::basic_string, std::allocator > const&, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_init'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0x3aa): In function `RTT::OS::SingleThread::SingleThread[not-in-charge](int, std::basic_string, std::allocator > const&, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0x3b4): In function `RTT::OS::SingleThread::SingleThread[not-in-charge](int, std::basic_string, std::allocator > const&, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0x3e8): In function `RTT::OS::SingleThread::SingleThread[not-in-charge](int, std::basic_string, std::allocator > const&, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_wait'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0x5bb): In function `RTT::OS::SingleThread::SingleThread[in-charge](int, std::basic_string, std::allocator > const&, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_init'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0x5ce): In function `RTT::OS::SingleThread::SingleThread[in-charge](int, std::basic_string, std::allocator > const&, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_init'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0x66a): In function `RTT::OS::SingleThread::SingleThread[in-charge](int, std::basic_string, std::allocator > const&, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0x674): In function `RTT::OS::SingleThread::SingleThread[in-charge](int, std::basic_string, std::allocator > const&, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0x6a8): In function `RTT::OS::SingleThread::SingleThread[in-charge](int, std::basic_string, std::allocator > const&, RTT::OS::RunnableInterface*)':
: undefined reference to `sem_wait'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0x856): In function `RTT::OS::SingleThread::~SingleThread [not-in-charge]()':
: undefined reference to `sem_post'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0x85e): In function `RTT::OS::SingleThread::~SingleThread [not-in-charge]()':
: undefined reference to `sem_wait'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0x8c6): In function `RTT::OS::SingleThread::~SingleThread [not-in-charge]()':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0x8d0): In function `RTT::OS::SingleThread::~SingleThread [not-in-charge]()':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0xa56): In function `RTT::OS::SingleThread::~SingleThread [in-charge]()':
: undefined reference to `sem_post'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0xa5e): In function `RTT::OS::SingleThread::~SingleThread [in-charge]()':
: undefined reference to `sem_wait'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0xac6): In function `RTT::OS::SingleThread::~SingleThread [in-charge]()':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0xad0): In function `RTT::OS::SingleThread::~SingleThread [in-charge]()':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0xc56): In function `RTT::OS::SingleThread::~SingleThread [in-charge deleting]()':
: undefined reference to `sem_post'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0xc5e): In function `RTT::OS::SingleThread::~SingleThread [in-charge deleting]()':
: undefined reference to `sem_wait'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0xcc6): In function `RTT::OS::SingleThread::~SingleThread [in-charge deleting]()':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0xcd0): In function `RTT::OS::SingleThread::~SingleThread [in-charge deleting]()':
: undefined reference to `sem_destroy'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0xe0c): In function `RTT::OS::SingleThread::setScheduler(int)':
: undefined reference to `sem_post'
/usr/local/orocos/lib/liborocos-rtt.a(._os_common_SingleThread.o)(.text+0xf28): In function `RTT::OS::SingleThread::start()':
: undefined reference to `sem_post'
collect2: ld returned 1 exit status
make[2]: *** [helloworld/helloworld] Error 1
make[1]: *** [helloworld/CMakeFiles/helloworld.dir/all] Error 2
make: *** [all] Error 2

This seems to have something to do with linking.

I am currently running ld version 2.12.

Unfortunately I have been unable to remedy this problem. Would any of you be able to help point me in the right direction?

Thanks,
Ben