[Plib-users] why there is a jerk(How to enable thread)

[Hemalatha S. <hem...@re...>]

 =A0=0AHi,=0A     I want to use threads for tile loading( in flightgear-0.9=
.4).  I=0Aenabled threads by using=0A=0A#define ENABLE_THREADS 1=0A=0A=0A  =
     While compling it was giving error in simgear ,saying=0A =0A =0A =0A u=
sr/local/include/simgear/threads/sgthread.hxx  - undefined reference to sta=
rt_handler=0A usr/local/include/simgear/threads/sgthread.hxx  - undefined r=
eference to set_cancel(SGThread::Cancel_t)=0AWhat could be the problem how =
to enable threads?=0A =0ARegards=0AHema=0A=0A