Building on macOS 12.3 Intel Fails

On macOS Monterey 12.3 on a MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports), with all system updates, and Xcode Version 13.3 (13E113), building seedtool-cli is failing.

I have done `brew install autoconf automake libtool shunit2` with no errors.

Doing `./build.sh` starts ok, but then fails with

```
seedtool-cli % git pull
…
seedtool-cli % git clean --ffdx
…
seedtool-cli % ./build.sh
…
Undefined symbols for architecture x86_64:
"_argp_program_bug_address", referenced from:
__help in libargp.a(argp-help.o)
"_strchrnul", referenced from:
_argp_args_usage in libargp.a(argp-help.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[1]: *** [argp-test] Error 1
make: *** [install-recursive] Error 1

seedtool-cli %
```

I have also tried `make clean`.