RegexKitLite 编译错误

Undefined symbols for architecture i386:
  "_u_errorName", referenced from:
      _rkl_NSExceptionForRegex in RegexKitLite.o
      _rkl_makeNSError in RegexKitLite.o
      _rkl_userInfoDictionary in RegexKitLite.o
  "_u_strlen", referenced from:
      _rkl_userInfoDictionary in RegexKitLite.o
  "_uregex_appendReplacement", referenced from:
      _rkl_replaceAll in RegexKitLite.o
  "_uregex_appendTail", referenced from:
      _rkl_replaceAll in RegexKitLite.o
  "_uregex_clone", referenced from:
      -[RKLBlockEnumerationHelper initWithRegex:options:string:range:error:] in RegexKitLite.o
  "_uregex_close", referenced from:
      _rkl_clearCachedRegex in RegexKitLite.o
  "_uregex_end", referenced from:
      _rkl_performRegexOp in RegexKitLite.o
      _rkl_findRanges in RegexKitLite.o
      _rkl_search in RegexKitLite.o
  "_uregex_find", referenced from:
      _rkl_search in RegexKitLite.o
  "_uregex_findNext", referenced from:
      _rkl_search in RegexKitLite.o
      _rkl_replaceAll in RegexKitLite.o
  "_uregex_groupCount", referenced from:
      _rkl_getCachedRegex in RegexKitLite.o
  "_uregex_open", referenced from:
      _rkl_getCachedRegex in RegexKitLite.o
  "_uregex_reset", referenced from:
      _rkl_replaceAll in RegexKitLite.o
  "_uregex_setText", referenced from:
      -[RKLBlockEnumerationHelper initWithRegex:options:string:range:error:] in RegexKitLite.o
      _rkl_clearCachedRegexSetTo in RegexKitLite.o
      _rkl_setCachedRegexToString in RegexKitLite.o
  "_uregex_start", referenced from:
      _rkl_performRegexOp in RegexKitLite.o
      _rkl_findRanges in RegexKitLite.o
      _rkl_search in RegexKitLite.o
ld: symbol(s) not found for architecture i386

clang: error: linker command failed with exit code 1 (use -v to see invocation)

加上libicucore.A.dylib这个库