Building on iPhone 7

[j-cimb-barker]

Hello,

I am trying to build this for iPhone 7. I am currently getting:

Undefined symbols for architecture arm64:
  "_openvpn_main", referenced from:
      ___31-[VPNWrapper startWithOptions:]_block_invoke in VPNWrapper.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Is it possible to modify the build so that it builds for arm64.

Thank you,

Joel