| MFLAGS | list of options which are to be passed to the compiler |
| M2C | the command name of the compiler driver |
Note that the rules section of mmm always resets the set of suffixes of make to the empty set before declaring the suffixes for Modula-2. This is necessary because of the many strange suffixes and associated implicit rules which are already present in make. For example, there still exist make versions which contain implicit rules for Ratfor with suffix .r which comes in conflict with Modula-2 reference files. If additional suffixes and associated implicit rules are needed they should be declared after the rules section of mmm.