This guy seems to provide some other version of the math library. When looking inside the include / lib folders of the Linaro toolchain, I can see that the math lib is definitively there but the linker doesn't seem to use / find them, at least not the library file.

What's a 32 bit FPU good for if I cant do any calculations other than addition, subtraction, multiplication and division?

The problem is I need the atan2 function for processing data acquired by a magnetometer to calculate the heading.