ghc bindist configure doesn't work on 9.2.6 Arm64 mac with any nonstandard config. Or: configure ignores CC and always picks gcc, no mwatter what

Summary

i'd expect > ./configure --prefix=/Users/carter/.ghc_install/ghc_9.2.6_hq --disable-ld-override CC=(which gcc-12) CPP=(which gcc-12) to work, since i have Gcc-12 install on my mac. instead I get configure failures, or to make things even more insane

> ./configure --prefix=/Users/carter/.ghc_install/ghc_9.2.6_hq --disable-ld-override CC=(which gcc-12)

doesn't fail, but when I look at the settings file which should be generated from this, i see ,("C compiler command", "gcc") rather than the expected /opt/homebrew/bin/gcc-12

Configure step of a bindist must use CC, CPP, CXX etc, and must generate the settings file. It seems that it doesn't.

I believe this issue likely also is the culprit for problems i've had installing ghc 9.4.x versions too

heres links to example configure runs https://www.irccloud.com/pastebin/WhqTTd5p/

and associated config.log https://www.irccloud.com/pastebin/nHchjYDl/

do note that my tiny shell examples are using fish shell, but as you can see from the pastes, the substitutions work correctly there

• Operating System: OSX, ARM, but should be a problem on all other platforms. I just am more likely than most to swap my C compilers around