Few days ago, I bought second macbook pro m2, and need to setup rails projects on my mac.

One type of error that raised very often was:

error: incompatible function pointer types passing 'VALUE (VALUE)'

And the fixed always by adding

--with-cflags=-Wno-error=incompatible-function-pointer-types

Sample

gem install msgpack -v '1.4.2' -- --with-cflags=-Wno-error=incompatible-function-pointer-types

I put here, so this will remind me in case I find similar issue.