swift调用c方法报错

ld: Undefined symbols:
  _aidlk_ecdh_curve25519_generate_keypair, referenced from:
      static AKUtil.AKECDH.cccccc() -> () in AKUtil[8](AKECDH.o)
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Undefined symbols:
Linker command failed with exit code 1 (use -v to see invocation)

解决方法：c方法不能写成static