Associate the SDK headers in XCode with a command: export CPATH=xcrun --show-sdk-path/usr/include

[JGFMK]

This was the first thing I installed.

git clone -b release/0.30 --recurse-submodules https://github.com/LeelaChessZero/lc0.git

I already have Xcode and brew and python within brew.. Why! virtualenv is way to go!

This is the comment for Apple Silicon M1. Can someone tell be where the heck I find the SDK headers
From what I can tell this is somewhere buried in the XCode Contents folder.
I am using a Macbook Pro (Sonoma 14.2.1) - so the Or statement applies to me in this link.

Associate the SDK headers in XCode with a command: export CPATH=xcrun --show-sdk-path/usr/include

'In Xcode' is confusing me in this statement!

A somewhat similar question/answer that led to my hunch
https://stackoverflow.com/questions/11811040/where-are-the-header-files-of-the-ios-sdk-located-and-where-of-osx

/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library

This is as far as my hunch gets me.
I hope the documentation can be made clearer on this point for others who follow in my footsteps.

Or, is this export just something I should just be setting in .zshrc and that will complete that step?

I tried the export env var approach:
I then tried to integrate this engine build into HIARCS and the engine wouldn't respond with a move.

Also .. Does this need doing irrespective of platform?
pip install --user git+https://github.com/LeelaChessZero/lc0.git

After all that.. I found all I needed to do was run:
brew install lc0