Doesn't compile when targeting aarch64-apple-darwin

[Jake-Shadle]

Library and Version

5.1.3

Operating System

aarch64-apple-darwin

Steps to Trigger Behavior

1. Try to compile for aarch64-apple-darwin
2. Failure

Code Snippet to Reproduce Behavior

Irrelevant

Expected Behavior

PhysX compiles

Actual Behavior

PhysX fails to compile for several reasons:

1. FdUnixFPU.cpp includes <xmmintrin.h> if PX_OSX is 1, which fails since that is an x86 only header. See EmbarkStudios@1e04de1 for a commit to fix this
2. SIMD is not properly enabled in PxVecMath.h, causing failures in other code that doesn't have the same guard. See EmbarkStudios@33e5eb7 for a commit to fix this.
3. SnSerialUtils.cpp fails to compile due to no case matching aarch64 and OSX, resulting in Unknown binary platform. See EmbarkStudios@720c8a5 for a patch to fix this.

FYI, the only reason that PhysX 4.1 compiled for aarch64-apple-darwin was because it misidentified the target to PX_IOS

https://github.com/NVIDIAGameWorks/PhysX/blob/a2c0428acab643e60618c681b501e86f7fd558cc/pxshared/include/foundation/PxPreprocessor.h#L103-L106

But it appears like iOS support has been completely dropped in PhysX 5 (with no CHANGELOG entry) resulting in these errors.

[preist-nvidia]

Hi @Jake-Shadle - we are not supporting this build platform, but you may contribute/find support for it on the community-maintained build config fork: https://github.com/NVIDIA-Omniverse/PhysX#community-maintained-build-configuration-fork