iPhone: Linker Errors with External Files

I've added some files to my project.

The sample code runs elsewhere but when I build my project it returns the errors below.

Building target "test" of project "test" with configuration "Debug" - (31 开发者_JAVA百科errors)
  Linking /Users/kshan/Desktop/test/build/Debug-iphonesimulator/test.app/test (31 errors)
     "___gmpn_sub_n", referenced from:
       ___gmpn_sub in CpabeTest.o
     "_bswabe_msk_unserialize", referenced from:
       _GenerateSK in CpabeTest.o

Is this a linking problem or something else?

Thank you very much.

---

Definitely a linker problem. Most likely, you're missing a compiled resource such as a framework.