[osg-users] Recurse on a private mutex (FreeBSD)

[Jim Brooks]

This had me fooled.
The call stack seemed to indicate an Nvidia OpenGL bug
But it wasn't.

#2  0x28913b78 in abort () from /lib/libc.so.6
#3  0x2895bc6f in pthread_testcancel () from /lib/libpthread.so.2
#7  0x28a0314d in _nv000007gl () from /usr/local/lib/libGL.so.1
#8  0x28a725e4 in ?? () from /usr/local/lib/libGL.so.1
#19 0x28fd1937 in _nv000486gl () from /usr/local/lib/libGLcore.so.1

FreeBSD has different thread libs.
Mixing them was the real cause.

Solution was to add "pthread" to TARGET_LINK_LIBRARIES
in CMakeLists.txt (of my app).