[macOS] error: use of undeclared identifier 'kIOMainPortDefault'

[jakirkham]

Summary

• OS: macOS
• Architecture: x86_64 or aarch64
• Psutil version: 5.9.8 (did not happen in 5.9.7)
• Python version: 3.8-3.12
• Type: installation (build)

Description

On macOS pre-12.0 kIOMainPortDefault is undefined. Instead it is called kIOMasterPortDefault. As a result, when building on macOS pre-12.0 with the constant kIOMainPortDefault (as seen below), an error is generated

psutil/psutil/arch/osx/cpu.c

Line 140 in 27a1432

 status = IOServiceGetMatchingServices(kIOMainPortDefault, matching, &iter); 

Given that both of these constants are equal to NULL, one approach would be to use NULL instead

cc @snOm3ad (who may have authored this code and have thoughts on the approach here)

xref: #2222