[Flightgear-users] how to enable threads

[deepha sv]

Hi,
     I want to use threads for tile loading( in flightgear-0.9.4).  I
enabled threads by using

#define ENABLE_THREADS 1


       While compling it was giving error in simgear ,saying



usr/local/include/simgear/threads/sgthread.hxx  - undefined reference
to start_handler
usr/local/include/simgear/threads/sgthread.hxx  - undefined reference
to set_cancel(SGThread::Cancel_t)
What could be the problem how to enable threads?

Regards
deepha

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