MacMsgTest is a SIOW application built with MPW from the ETO #19 developer CD. It is compiled PPC native and the routines that execute at interrupt or deferred task time (such as the completion routines) have not been developed to run under a 68K compilation.
There is a makefile, called "makefile", in the MacMsgTest folder that will build the MacMsgTest tool. However, before executing the makefile, you should define a variable called {MacMsgTestFolder} at the shell level which defines the path to the MsgTst Folder.
The makefile is currently configured to include symbols and generate a .xcoff file.