I've seen examples of cmake files that set flags ENABLE_FAST_MATH, and CUDA_FAST_MATH. That would seem logical in systems with CUDA installed.
But there are warnings, particularly for the 'ENABLE_FAST_MATH' option, where even the CMakeLists file comes with a built in warning "not recommended."
Are there any guidelines for setting these flags? Any idea why ENABLE_FAST_MATH would not be recommended?