MacOS; M1 chip; MacPorts; LD_LIBRARY_PATH? compile+link failure (C)

[Kenneth Wolcott]

Hi;

<https://rosettacode.org/wiki/Hamming_numbers#C>

Rosetta Code "Hamming numbers" task written in C (version 2) fails for
me on MacOS (M1) when using the following command:

clang -lm -lgmp -o ./hamming_numbers ./hamming_numbers.c

failure message:
Undefined symbols for architecture arm64:
  "__eq", referenced from:
      _get_ham in hamming_numbers-af6ba2.o
  "__setv", referenced from:
      _get_ham in hamming_numbers-af6ba2.o
      _main in hamming_numbers-af6ba2.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

My LD_LIBRARY_PATH env variable does not exist or is blank.

Should I use this env var?

If so, what should it be set to?

What am I missing in my compiler+linker command?

Thanks,
Ken Wolcott