Subject:	Re: emulator woes
To:	djgpp AT sun DOT soe DOT clarkson DOT edu (DJ's GPP mailing list)
Date:	Sat, 6 Feb 93 15:19:08 EST
From:	Stephen Turnbull <turnbull AT ecolan DOT sbs DOT ohio-state DOT edu>

    I took a look at the emulator correspondence, and I noticed nobody
ever actually listed the GO32 variable.  Here's the README and my
interpretation of the story:

The readme says:
> * An 80387 is required to do floating point.  An emulator is provided.
>   cc1 and cc1plus shouldn't use the 387 unless compiling floating point
>   code.  The environment variable "387" can override the auto-detection
>   routine:
>     SET 387=YES   to force 387 handlers to be enabled
>     SET 387=NO    to force 387 accesses to fault
>     SET 387=QUERY to get a message showing the results of the auto-detection
>   If no 80387 is present and the program attempts to use it, a message
>   indicating where the instruction is will be displayed.  To use the
>   387 emulator, add "emu c:\djgpp\emu87\emu387" to the GO32 environment
>   variable.  Specifying use of the emulator overrides the "387"
>   environment variable and autodetection code.

The problem:
> I tried modifying the GO32 variable to include the
> 80387 emulation, but the problem remains. Obviously I am
> doing something simple wrong, but I can't think what.

I guess:
He didn't include a full path to the emulator code.  Or maybe there
was no emulator at the end of the path.

He continued:
> I kept the "emu" option in the GO32 variable...is there a 
> preferred syntax on having multiple entries in the GO32
> SET -- like using ";" in PATH?

I guess:
Since the specification of "emu" in the GO32 variable overrides "387"
and auto-detection, keeping the "emu" option will cause you to hang up
on whatever error killed you in the first place.

I suggest:
* Get the emulator and put it where it belongs.
* Set the path and filename correctly in the "emu <path>emu387"
  option.
***** OR *****
* *Remove the option* and set "387=NO" in the environment.
***** AND *****
* Whenever possible, *copy* the relevant portions of CONFIG.SYS and
  AUTOEXEC.BAT to your posting so your consultants don't have to guess
  what happened!
-- 
 
Stephen Turnbull
The Ohio State University, Department of Economics
410 Arps Hall, 1945 N. High St., Columbus, OH  43210-1172  USA
Phone: (614) 292-0654  Fax: ...-3906  Email: turnbull DOT 1 AT osu DOT edu

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