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From: dag@persoft.com (Daniel A. Glasser)
Newsgroups: comp.sys.atari.st
Subject: Re: Mixing C and Assembly
Summary: MWC assembler follows Unix assembler syntax, not Motorolla
Keywords: MWC assembler syntax
Message-ID: <1990May7.151431.15956@persoft.com>
Date: 7 May 90 15:14:31 GMT
References: <3140@rodan.acs.syr.edu> <11900@stag.math.lsa.umich.edu> <1716@electro.UUCP>
Organization: Persoft Inc., Madison, WI
Lines: 25


The assembler shipped with the Mark Williams C package uses a Unix V7 style
syntax.  The object file format is also modeled after the Unix V7 object file
format, allowing for long symbol names (the object format supports flexnames,
the compiler doesn't generate them) and the symbol table is case sensitive.

MADMAC was produced by Atari long after MWC shipped its compiler package
and the object file format was pretty much determined.

When the MWC object file format was determined there was no acceptable
standard available.  As a result they ported their Coherent object format
and tools to the 68000 and the Atari ST.  (Coherent is a ground-up/clean-room
implementation of Unix V7.)

The compiler can be made to generate Motorolla style assembly with an
undocumented switch (which I cannot recall at this moment, try -VMOTO or
something like that), and there are converters available for MWC->DRI and
DRI->MWC object files.  Note that the Alcyon/DRI compiler uses the leading
"_" on symbol names, whereas the MWC compiler uses a trailing "_".  The
converters handle this.

						Daniel A. Glasser
-- 
  Daniel A. Glasser  |  Persoft, Inc.  |  dag@persoft.com (if it works yet)
  "Their brains were small, and they died."