Features (The GNU Modula-2 Compiler)

the compiler currently complies with Programming in Modula-2 Edition 2, 3, 4 and ISO Modula-2. Users can switch on specific language features by using: ‘-fpim’, ‘-fpim2’, ‘-fpim3’, ‘-fpim4’ or ‘-fiso’.
the option ‘-fswig’ will automatically create a swig interface file which corresponds to the definition module of the file being compiled.
exception handling is compatible with C++ and swig. Modula-2 code can be used with C or C++ code.
Python can call GNU Modula-2 modules via swig.
shared libraries can be built.
fixed sized types are now available from ‘SYSTEM’.
variables can be declared at addresses.
much better dwarf-2 debugging support and when used with ‘gdb’ the programmer can display RECORDs, ARRAYs, SETs, subranges and constant char literals in Modula-2 syntax.
supports sets of any ordinal size (memory permitting).
easy interface to C, and varargs can be passed to C routines.
many Logitech libraries have been implemented and can be accessed via: ‘-flibs=m2log,m2pim,m2iso’.
coroutines have been implemented in the PIM style and these are accessible from SYSTEM. A number of supporting libraries (executive and file descriptor mapping to interrupt vector libraries are available through the ‘-flibs=m2iso,m2pim’ switch).
can be built as a cross compiler (for embedded microprocessors such as the AVR and the ARM).