91 lines
3.1 KiB
Groff
91 lines
3.1 KiB
Groff
.TH EM_M2 6ACK
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.ad
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.SH NAME
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em_m2 \- ACK Modula\-2 compiler
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.SH SYNOPSIS
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.B em_m2
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.RI [ option ]
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.I source
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.I destination
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.SH DESCRIPTION
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.I Em_m2
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is a
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compiler, part of the Amsterdam Compiler Kit, that translates Modula-2 programs
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into EM code.
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The input is taken from
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.IR source ,
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while the
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EM code is written on
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.IR destination .
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.br
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.I Option
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is a, possibly empty, sequence of the following combinations:
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.IP \fB\-I\fIdirname\fR
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.br
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append \fIdirname\fR to the list of directories where definition modules
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are looked for.
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.PP
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When the compiler needs a definition module, it is first searched for
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in the current directory, and then in the directories given to it by the
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\-\fBI\fR flag
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in the order given.
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.IP \fB\-M\fP\fIn\fP
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set maximum identifier length to \fIn\fP.
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The minimum value for \fIn\fR is 14, because the keyword
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"IMPLEMENTATION" is that long.
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.IP \fB\-n\fR
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do not generate EM register messages.
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The user-declared variables will not be stored into registers on the target
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machine.
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.IP \fB\-L\fR
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do not generate the EM \fBfil\fR and \fBlin\fR instructions that enable
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an interpreter to keep track of the current location in the source code.
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.IP \fB\-V\fIcm\fR.\fIn\fR,\ \fB\-V\fIcm\fR.\fIncm\fR.\fIn\fR\ ...
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.br
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set the size and alignment requirements.
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The letter \fIc\fR indicates the simple type, which is one of
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\fBw\fR(word size), \fBi\fR(INTEGER), \fBl\fR(LONGINT), \fBf\fR(REAL),
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\fBd\fR(LONGREAL), or \fBp\fR(POINTER).
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It may also be the letter \fBS\fR, indicating that an initial
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record alignment follows.
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The \fIm\fR parameter can be used to specify the length of the type (in bytes)
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and the \fIn\fR parameter for the alignment of that type.
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Absence of \fIm\fR or \fIn\fR causes a default value to be retained.
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.IP \fB\-w\fR\fIclasses\fR
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suppress warning messages whose class is a member of \fIclasses\fR.
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Currently, there are three classes: \fBO\fR, indicating old-flashioned use,
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\fBW\fR, indicating "ordinary" warnings, and \fBR\fR, indicating
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restricted Modula-2.
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If no \fIclasses\fR are given, all warnings are suppressed.
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By default, warnings in class \fBO\fR and \fBW\fR are given.
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.IP \fB\-W\fR\fIclasses\fR
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allow for warning messages whose class is a member of \fIclasses\fR.
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.IP \fB\-x\fR
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make all procedure names global, so that \fIadb\fR(1) understands them.
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.IP \fB\-s\fR
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make INTEGER ranges symmetric, t.i., MIN(INTEGER) = - MAX(INTEGER).
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This is useful for interpreters that use the "real" MIN(INTEGER) to
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indicate "undefined".
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.IP \fB-R\fR
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disable all range checks.
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.IP \fB-A\fR
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enable extra array bound checks, for machines that do not implement the
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EM ones.
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.IP \fB-U\fR
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allow for underscores within identifiers. Identifiers may not start with
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an underscore, even if this flag is given.
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.IP \fB-3\fR
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only accept Modula-2 programs that strictly conform to [1].
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.LP
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.SH FILES
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.IR ~em/lib/em_m2 :
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binary of the Modula-2 compiler.
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.SH SEE ALSO
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\fIack\fR(1), \fImodula-2\fR(1)
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.IP [1]
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N. Wirth, \fIProgramming in Modula-2\fP, 3rd edition, Springer Verlag.
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.SH DIAGNOSTICS
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All warning and error messages are written on standard error output.
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.SH REMARKS
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Debugging and profiling facilities may be present during the development
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of \fIem_m2\fP.
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