...
If you build Ice Touch in debug mode (the default), you must ensure that the architecture used to build the tests is the same architecture as the one used to build the iPhone "Test Suite" application. To build Ice Touch and the tests with a specific architecture, you can set CXXARCHFLAGS either on the make command line or in in config/Make.rules or on the make command line:
$ make COMPILE_FOR_IPHONE=yes CXXARCHFLAGS="-arch arm64"
...