ADT package IPA errors with Undefined symbols for architecture arm64

I'm using AIR 22 Beta ADT from command line to try to build a simple ipa-test. I built a simple empty SWF using Flex 4.15, then tried to -package. However I'm getting:

Undefined symbols for architecture arm64:

  "_CFStringLowercase", referenced from:

      _platform_LCMapString in libRuntimeHMAOT.arm-air.a(gsstring_osx.o)

  "_kCFBooleanFalse", referenced from:

      _initCommonOptions in libRuntimeHMAOT.arm-air.a(gsnum_osx.o)

  "_kCFNumberFormatterZeroSymbol", referenced from:

      _initCommonOptions in libRuntimeHMAOT.arm-air.a(gsnum_osx.o)

      l_switch.table in libRuntimeHMAOT.arm-air.a(gsnum_osx.o)

  "_kCFNumberFormatterNegativeSuffix", referenced from:

      _platform_set_numberformat_mode in libRuntimeHMAOT.arm-air.a(gsnum_osx.o)

      l_switch.table in libRuntimeHMAOT.arm-air.a(gsnum_osx.o)

  "_kCFNumberFormatterPositivePrefix", referenced from:

      _platform_set_numberformat_mode in libRuntimeHMAOT.arm-air.a(gsnum_osx.o)

      l_switch.table in libRuntimeHMAOT.arm-air.a(gsnum_osx.o)

  "_CFNumberCreate", referenced from:

      _internalSetNumberProperty in libRuntimeHMAOT.arm-air.a(gsnum_osx.o)

  "_CFNumberFormatterSetProperty", referenced from:

      _internalSetNumberProperty in libRuntimeHMAOT.arm-air.a(gsnum_osx.o)

      _internalSetStringProperty in libRuntimeHMAOT.arm-air.a(gsnum_osx.o)

      _initCommonOptions in libRuntimeHMAOT.arm-air.a(gsnum_osx.o)

  "_kCFNumberFormatterGroupingSize", referenced from:

...

(1000's more lines)

Using OSX 10.11.4, Xcode 7.3/iOS SDK 9.3. I tried AIR SDK 21 and the one in Flex 4.15 (AIR 20?), same result. I also tried replacing ld64 in the AIR SDKs as noted in other posts, no effect.