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From: MCCABE@MTUS5.BITNET
Newsgroups: comp.sys.atari.st
Subject: Personal Pascal question
Message-ID: <8808230057.AA13653@ucbvax.Berkeley.EDU>
Date: 22 Aug 88 17:56:00 GMT
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Organization: The Internet
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Date:    22 August 1988, 12:36:14 EST
From:    Jim McCabe                                      MCCABE at MTUS5
To:      INFO-ATARI16 at SCORE.STANFORD.EDU
Subject: Personal Pascal question

This is directed to people who really know a lot about Personal Pascal, or
those who have written huge programs in it.

Today, while rewriting the editor in a BBS of mine, my source code
stopped compiling.  The compiler gets to the last line of the file
("end."), and stops with the error

          Too many external references

So, I looked through my entire Personal Pascal manual for some information
about just what the limit IS for external references, and it doesn't say
anything about them.  Here's my situation:

   I have declared:

          305 constants, plus those in GEMCONST.PAS
                 (I use a very large resource file)
          28 types, plus GEMTYPE.PAS
          97 global variables (I *have* to use them, or else each
                 procedure would have huge parameter lists --
                 believe me on this...) containing:
              6 file variables
              17 dialog box pointers (Dialog_Ptr)
              1 menu pointer (Menu_Ptr)
          8 external functions or procedures, all global
          15 TOS function declarations, all global
          6 pointer variables, all local to one procedure

Now the weird thing is, I have had the 8 EXTERNAL routines and the
15 TOS routines declared for months, and it's always taken them until
today when I changed my editor so that it uses pointers instead of
a big array.  The editor routine even compiles beautifully, and the
error pops up on the last line of the main program.

Has anyone else experienced this error?  What *is* the limit on
external references?  (By the way, I'm using version 1.x, NOT one of
the newer version 2.x compilers...)  I'm going to make the file
variables local, since those use pointers too, but still, the
error doesn't make sense.

I don't think Personal Pascal handles external referrences well
in the first place.  For one thing, when I try to link together
a few really large modules, the compiler always "forgets" to
link a couple of the files (seems random), and it also screws up
some of its own internal variables.  For instance, it will give
me a linking error, saying that the function "bssanf" is undeclared.
My program doesn't use any function bssanf.  :)

Does anyone have any ideas on this?  Maybe the new version of
the compiler works better, who knows.


                                                 Jim McCabe
                                                 MCCABE @ MTUS5.BITNET