Objective c 新的Three20构建错误

我刚将我的项目升级到最新的Three20版本。 编译时，我会出现以下错误：

Undefined symbols:
  "___restore_vfp_d8_d15_regs", referenced from:
  +[TTEntityTables(TTSingleton) sharedInstance] in libThree20Core.a(TTEntityTables.o)
  +[TTEntityTables(TTSingleton) releaseSharedInstance] in libThree20Core.a(TTEntityTables.o)
  +[TTEntityTables(TTSingleton) allocWithZone:] in libThree20Core.a(TTEntityTables.o)
  "___save_vfp_d8_d15_regs", referenced from:
  +[TTEntityTables(TTSingleton) sharedInstance] in libThree20Core.a(TTEntityTables.o)
  +[TTEntityTables(TTSingleton) releaseSharedInstance] in libThree20Core.a(TTEntityTables.o)
  +[TTEntityTables(TTSingleton) allocWithZone:] in libThree20Core.a(TTEntityTables.o)
ld: symbol(s) not found
collect2: ld returned 1 exit status

有人知道这里发生了什么吗

提前感谢,， 卢卡斯

见或