82 lines
2.6 KiB
Groff
82 lines
2.6 KiB
Groff
.TH EM_PC 6 "$Revision$"
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.ad
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.SH NAME
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em_pc \- Pascal compiler
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.SH SYNOPSIS
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.B ~em/lib.bin/em_pc
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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_pc
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is a compiler that translates Pascal programs into EM code.
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Normally the compiler is called by means of the user interface program
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\fIack\fR(1).
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.PP
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The input is taken from
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.IR source ,
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while the 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\-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 9, because the keyword
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"PROCEDURE" is that long.
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.IR n
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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(LONG), \fBr\fR(REAL),
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\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
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suppress warning messages.
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.IP
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.IP \fB\-R\fR
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disable range checks. Additionally, the run-time tests to see if
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a function is assigned, are skipped.
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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\-C\fR
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the lower case and upper case letters are treated differently.
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.IP "\fB\-u\fR, \fB\-U\fR"
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allow underscores in identifiers. It is not allowed to start an identifier
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with an underscore.
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.IP \fB\-a\fR
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don't generate code for assertions.
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.IP \fB\-c\fR
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allow C-like strings. This option is mainly intended for usage with
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C-functions. This option will cause the type 'string' to be known.
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.IP \fB\-d\fR
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allow the type 'long'.
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.IP \fB\-i\fR\fIn\fR
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set the size of integer sets to \fIn\fR. When not used, a default value is
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retained.
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.IP \fB\-s\fR
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allow only standard Pascal. This disables the \fB\-c\fR, \fB\-d\fR, \fB\-u\fR,
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\fB\-U\fR and \fB\-C\fR
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options. Furthermore, assertions are not recognized at all (instead of just
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being skipped).
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.IP \fB\-t\fR
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trace calls and exits of procedures and functions.
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.PP
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.SH FILES
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.IR ~em/lib/em_pc :
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binary of the Pascal compiler.
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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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