Problem compiling against OsgBullet 2.81

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Ran cmake on the check out version of OsgWorks 3.0.0 and when I was compiling 
the applications and the examples I got the following error messages:

Linking CXX executable ../../bin/BasicDemo
../../lib/libosgbCollision.so.3.00.00: undefined reference to 
`btShapeHull::buildHull(double)'
../../lib/libosgbDynamics.so.3.00.00: undefined reference to 
`btAngularLimit::set(double, double, double, double, double)'
../../lib/libosgbDynamics.so.3.00.00: undefined reference to 
`btStaticPlaneShape::btStaticPlaneShape(btVector3 const&, double)'
../../lib/libosgbDynamics.so.3.00.00: undefined reference to 
`btGeneric6DofSpringConstraint::setStiffness(int, double)'
../../lib/libosgbDynamics.so.3.00.00: undefined reference to 
`btGeneric6DofSpringConstraint::setDamping(int, double)'
../../lib/libosgbCollision.so.3.00.00: undefined reference to 
`btConvexHullShape::btConvexHullShape(double const*, int, int)'
collect2: error: ld returned 1 exit status
make[2]: *** [bin/BasicDemo] Error 1
make[1]: *** [examples/basicdemo/CMakeFiles/BasicDemo.dir/all] Error 2
make: *** [all] Error 2

And hence the build fails.

Original issue reported on code.google.com by ming...@gmail.com on 8 Oct 2014 at 3:49

[GoogleCodeExporter]

The release I was compiling on is Ubuntu 14.04.1

Original comment by ming...@gmail.com on 8 Oct 2014 at 5:06

[GoogleCodeExporter]

This looks like a mismatch between Bullet and osgBullet regarding double 
precision. osgBullet's CMake *should* automatically detect whether your Bullet 
was built with USE_DOUBLE_PRECISION off or on, but somehow this didn't work for 
you.

Check your osgBullet CMakeCache.txt in a text editor. Look for these entries:
    OSGBULLET_USE_DOUBLE_PRECISION:BOOL=ON
and
    USE_DOUBLE_PRECISION:BOOL=ON
They need to either both be ON as I have shown above, or they need to both be 
OFF. It depends on how you built Bullet.

I have seen this problem before, but have never been able to provide a robust 
CMake fix for it. CMake compiles a test program that will either compile or 
fail depending on how Bullet was built, and then it sets those flags in 
CMakeCache.txt accordingly. If you can provide a CMake fix to resolve the 
issue, please attach a diff. Thanks.

Original comment by SkewMat...@gmail.com on 10 Oct 2014 at 1:58

• Changed state: Accepted