What is GNU Modula-2 (The GNU Modula-2 Compiler)

### 1.1 What is GNU Modula-2 ¶

GNU Modula-2 is a front end for the GNU Compiler Collection (GCC). The GNU Modula-2 compiler is compliant with the PIM2, PIM3, PIM4 and ISO dialects. Also implemented are a complete set of free ISO libraries and PIM libraries.

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#### Footnotes

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The four Modula-2 dialects supported are defined in the following references:

PIM2: ’Programming in Modula-2’, 2nd Edition, Springer Verlag, 1982, 1983 by Niklaus Wirth (PIM2).

PIM3: ’Programming in Modula-2’, 3rd Corrected Edition, Springer Verlag, 1985 (PIM3).

PIM4: ’Programming in Modula-2’, 4th Edition, Springer Verlag, 1988 (PIM4).

ISO: the ISO Modula-2 language as defined in ’ISO/IEC Information technology - programming languages - part 1: Modula-2 Language, ISO/IEC 10514-1 (1996)’