stdio.hを探す clang++

stdio.hがないといわれる

c - Where is my "stdio.h" in Mac? - Stack Overflow

find /Applications/Xcode.app -path '*/usr/include/stdio.h'

しかし、

https://developer.apple.com/download/more/

からCommand Line Toolsインストールでいけた

Architectureのこと

https://developer.android.com/ndk/guides/standalone_toolchain.html

targetの一覧

Cross-compiling from macOS to iOS - rustc doesn't list ios as a target - help - The Rust Programming Language Forum