bug#8562: Emacs 23.1 and later don't work in windows 98

[oslsachem <oslsachem@gmail.com>]

> Which suggested solution is that?  There were 2 in that thread.

To be honest, I only tried the first one ("start Emacs from the
command-line as: emacs -Q -xrm Emacs.fontBackend:gdi") because:

- I deemed them to be functionally equivalent.

- The second solution involves editing the windows registry (which is
a frail but essential part of the system).

- Emacs doesn't seem to add any entry to the windows registry after
running the "addpm.exe" as opposed to what is stated at
http://www.gnu.org/software/emacs/manual/html_node/emacs/MS_002dWindows-Registry.html

- The "set Emacs.fontBackend in the registry" indication is too terse
for me to understand.


> Anyway, Emacs developers need help to debug this, as none of us has
> access to a Windows 9X machine anymore.  If you are willing to work
> with us, I'm sure we will find the solution.

Of course, just tell me what I have to do :).

Here you have "updated" screenshots of what Emacs-23.3 looks like in
windows 98 when started in GUI mode:

Initial size:

http://www.speedyshare.com/files/28318597/EmacsInitialSize.png

Maximized size:

http://www.speedyshare.com/files/28318598/EmacsMaximized.png

File submenu:

http://www.speedyshare.com/files/28318599/EmacsFileSubmenu.png

Edit submenu:

http://www.speedyshare.com/files/28318600/EmacsEditSubmenu.png

The Options and Buffers submenus look hidden but are there:

http://www.speedyshare.com/files/28318601/EmacsOptionsSubmenu.png

http://www.speedyshare.com/files/28318602/EmacsBuffersSubmenu.png

Emacs abort dialog when it eventually has a fatal error:

http://www.speedyshare.com/files/28318603/EmacsAbortDialog.png

Spanish version of Windows 98 error message:  "This program has
performed an illegal operation and will be shut down.  If the problem
persists, contact the program vendor. [Close] [Details]":
Inside the text box, spanish version of Windows 98 error message:
"EMACS caused an invalid page fault in module EMACS.EXE".

     First part:

    http://www.speedyshare.com/files/28318604/EmacsPageFault1stPart.png

    Second part:

    http://www.speedyshare.com/files/28318605/EmacsPageFault2ndPart.png

In the meantime, I've been skimming through the instructions about
compiling and debugging Emacs and I have managed to build Emacs
succesfully and run it using the debugger.

Here is a log of the debugger after spending a while fiddling with the
Emacs submenus until a fatal error happens:

http://www.speedyshare.com/files/28318621/gdb.txt

Notice that I run Emacs more than once and that, the last time,
running Emacs using the suggested solution doesn't produce any
noticeable difference (i.e the fatal error is the same).

Note: I tried to build Emacs using the --no-opt option for configure
but when trying to run Emacs using the debugger, gdb produced an error
("internal-error: virtual memory exhausted: can't allocate ..........
bytes. A problem internal to GDB has been detected, further debugging
may prove unreliable") so I have built Emacs without --no-opt ( I
guess that is why the executables end up in oo-spd/i386 instead of
oo/i386).


Unrelated note:
Sorry for the poor text format of my previous message.  I failed to
notice that I was using rich text format instead of plain text.
Hopefully this message will look better.