Compilation issue on Macs with arm architecture

[dchandan]

Code lines 27--31 in the cpuid function in teca_thread_util.cxx do not compile on Macs with Apple Silicon (ARM architecture). This causes the installation of the python package to fail. Any suggestions how these lines can be modified?

[burlen]

Thanks for the report, we have not tested teca on m1 yet. I don't have one available at the moment but #762 should get you going, or comment out those lines.

We'll need to dig a little deeper into this to get threading working correctly on m1. it seems as though Apple wraps cpuid and we should be able to get what we need from that. here are some links to more info.

https://opensource.apple.com/source/xnu/xnu-4570.61.1/osfmk/arm/cpuid.h.auto.html
https://opensource.apple.com/source/WTF/WTF-7601.1.46.42/wtf/Platform.h.auto.html
https://developer.apple.com/documentation/apple-silicon/addressing-architectural-differences-in-your-macos-code