warning: argument unused during compilation: '-D SUPPRESS_WARNINGS' [-Wunused-command-line-argument]

[nlsandler]

This occurs when we use Clang 18 on Ubuntu and run the command:
./test_compiler /home/ubuntu/nqcc2/_build/default/bin/main.exe --chapter 10

This is presumably b/c the gcc command is only being used for assembly/linking, not for compilation, but I'd like to understand why that isn't happening with Clang 15 on macOS. Did Clang's handling of this option change?

If so, should avoid including -D SUPPRESS_WARNINGS when none of GCC's inputs are C source files, but this isn't terribly high priority