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From: dillon@CORY.BERKELEY.EDU (Matt Dillon)
Newsgroups: comp.sys.amiga
Subject: Re: Manx 3.4 bug and sc.c
Message-ID: <8705171820.AA20297@cory.Berkeley.EDU>
Date: Sun, 17-May-87 14:20:07 EDT
Article-I.D.: cory.8705171820.AA20297
Posted: Sun May 17 14:20:07 1987
Date-Received: Sun, 17-May-87 19:50:33 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
Lines: 55


	You just ran across the infamous "cannot make declaration larger than
32K problem.  E.G., if COUNT was defined to be, say, 256, then the storage 
would be 131072 bytes.  The Aztec (And this is *definately* a bug) compiler 
uses unsigned shorts to remember global sizes.  I believe the
assembler has the same problem.    Worse, if you declare something that 
is larger than 32K, the compiler doesn't tell you that it isn't giving you
the space you requested!  E.G.  char cell[65535] gives you an 'array size 
cannot be negative' error, but char cell[65537] doesn't give an error message
and only allocates a single byte.

	In anycase, what happened was that the generated assembly became:

	global	Cell,0

	instead of 

	global  Cell,131072

	Which caused the assembler to ignore the declaration.  Apart from this
size limitation, I have found the Aztec does just about everything right.  I
use strange and uncommon declarations all the time and there isn't a problem.
In fact, both Lattice and Aztec are very good compilers.  I tend to like 
Aztec better, however.  With a 1.4 Meg ram disk and precompiled symbol tables,
compiles only take a few seconds!  Whereas with Lattice, I would be eating
up another 100K and would have to wait while the thing compiled all the 
thousands of #include's over and over again.

				-Matt

Your message:

:I was using someone's Manx compiler to compile the fractal terraion
:generator sc.c (which, incidentally just guru'd when I tried to run it..)
:anyway, it has a line
:
:short Cell[COUNT][COUNT];
:
:in it (a global). This compiles, but is an undefined symbol at link time.
:Changing the line to 
:
:static short Cell ....
:
:fixed this.
:Conclusion: this compiler (at least) does not understand C.
:ow if Microsoft would write Intuition support and a MC680XX code generator
:or MC4.0.... dream on :->.
:
:michael.

	BTW  Microsoft?  There getting almost as bad as IBM.  I wouldn't
trust them to give us a well supported compiler any more than I would trust
my dog with an unattended cookie plate.

				-Matt