msdecl usage problem

[hulovebin]

./msdecl -w -I$SDKROOT/usr/include $SDKROOT/usr/lib/libobjc.A.tbd $SDKROOT/usr/include/objc/{runtime,objc,message,objc-exception,objc-sync}.h
libpath: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib/libobjc.A.tbd
lua: ./msdecl:235: attempt to call a nil value (field 'load')
stack traceback:
./msdecl:235: in function <./msdecl:233>
(...tail calls...)
./msdecl:265: in main chunk
[C]: in ?