Re: Windows 9X without KernelEx

[Eli Zaretskii <eliz@gnu.org>]

> Date: Sun, 16 Jun 2024 08:36:28 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: stefankangas@gmail.com, emacs-devel@gnu.org
> 
> > From: Po Lu <luangruo@yahoo.com>
> > Cc: stefankangas@gmail.com,  emacs-devel@gnu.org
> > Date: Sun, 16 Jun 2024 10:01:29 +0800
> > 
> > Eli Zaretskii <eliz@gnu.org> writes:
> > 
> > > The GDI32.DLL part is specific to the functions used by w32font.c.
> > > But the idea is general: all of the APIs that we call directly are
> > > supposed to be present in some system DLL, even though some of them
> > > have stub implementations.  For example, I have SHELL32.DLL (dated Sep
> > > 1998!) from my old Windows 9X system, and in it I see both
> > > ShellExecuteW and SHFileOperationW exports.
> > 
> > Mine reports a creation time of May 11th 1998, but upon running `nm' I
> > see that it indeed exports those two functions, and a test program
> > compiled in MinGW:
> > 
> >   int
> >   main ()
> >   {
> >     extern int ShellExecuteW ();
> >     extern int SHFileOperationW ();
> >     char *x = (char *) &ShellExecuteW;
> >     char *y = (char *) &SHFileOperationW;
> >   }
> > 
> > starts and exits with no error dialog, and yet Emacs still does not link
> > if it imports either symbol.  Might there perhaps be symbol versioning
> > mechanisms or parameters in object files that influence its view of
> > external symbols?  I'm lost, sorry.
> 
> I think the reason is we don't link with -lshell32 anymore.  We used
> to do that until Emacs 25, but dropped that since for some reason.

I know why we dropped it: MinGW GCC adds -lshell32 by default, see
"gcc -dumpspecs".  But maybe you are using an old GCC version which
doesn't or something?  If you add "-v" to the link command line, do
you see "-lshell32" in the command printed by GCC?