make error？

[Hang-shao]

error：ld: symbol(s) not found for architecture x86_64

PamdeMacBook-Air:~ pam$ uname -a
Darwin PamdeMacBook-Air.local 21.2.0 Darwin Kernel Version 21.2.0: Sun Nov 28 20:28:54 PST 2021; root:xnu-8019.61.5~1/RELEASE_X86_64 x86_64

PamdeMacBook-Air:~ pam$ clang -v
Apple clang version 13.0.0 (clang-1300.0.29.30)
Target: x86_64-apple-darwin21.2.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin