It is definitely possible to target Intel when compiling on an Apple Silicon (ARM64) system, as Xcode does that all the time when building universal bundles of an app. However, I am unable to replicate this compiling a C program with make (specifically Stockfish).
What I've tried
I'm invoking make like so: make build ARCH=x86-64-modern COMP=clang (the same command works when I substitute x86-64-modern for apple-silicon). I've tried using the gcc compiler, which also worked when targeting the apple-silicon arch.
The problem
The make build command terminates with a bunch of errors, most importantly:
Undefined symbols for architecture x86_64:
"_main", referenced from:
implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Above the error is a bunch of lines complaining that a file was built for an "unknown bitcode architecture:
ld: warning: ignoring file <name>.o, lto file was built for unknown bitcode architecture which is not the architecture being linked (x86_64): <name>.o
So, it seems like the compilation phase succeeds, but the linking phase fails due to missing symbols. How would I acquire and provide the missing symbols to ld such that it can link successfully?