Build.gradle uses obsolete CMake flags for NEON and VFP

[mdurrani808]

opencv/opencv#18244

https://github.com/opencv/opencv/blob/422f802ec96feecbc9db2f60879e8fe364cf8a92/cmake/OpenCVCompilerOptimizations.cmake#L101-L102

Still have to figure out how to check if NEON and VFP are getting enabled or not

[mdurrani808]

Not sure if I'm off base here or not to be completely honest.
This shows up in the logs:
-- Performing Test HAVE_CPU_NEON_SUPPORT (check file: cmake/checks/cpu_neon.cpp)
-- Performing Test HAVE_CPU_NEON_SUPPORT - Failed

[rzblue]

Logs from where?

The latest CI for arm64 says otherwise: https://github.com/wpilibsuite/thirdparty-opencv/actions/runs/3579760056/jobs/6021264064#step:5:189

[mdurrani808]

Athena and Arm32, is NEON not supported on those?
On arm64 it also says
disabled: VFPV3

[ThadHouse]

Arm64 wouldn’t have vfpv3 anyway. Arm64 is guaranteed to have floating point and vectorization support.

Athena does have neon and vfpv3.

Normal arm32 is a special case. It’s optional on the cpu. I don’t know what we have the build set up for.