[RFC] Improve testsuite for poor expect behavior

[Pierre Muller]

  My way to use cygwin expect for DJGPP
is quite ugly, but it gives some results.

  The basic idea is to consider that djgpp 
is a remote target and to overload several
expect procedures to cope with DJGPP specific 
features.

  I added a .dejagnu directory in my cygwin home,
with an empty site.exp file
and a boards directory.
  This directory stores several files,
but only one concerns DJGPP.
  I simply called it djgpp.exp
and I run the testsuite
in 
  djbuild/gdb/testsuite
(with a DJGPP compiled gdb.exe at djgpp/gdb level).
I an sereral testsuite subsets using
make check RUNTESTFLAGS="--target=djgpp --host_board=djgpp gdb.*/wa*.exp"
Which means that the same file ($HOME/.dejagnu/boards/djgpp.exp)
is used both as host_board and target...
as I said it is really ugly, but I didn't have time to
sort things out, and I am not sure I will have the willingness
to do it...

  I attached the djpp.exp file.

  The key functions are
djgpp_spawn and djgpp_exec
djgpp_exec uses a response file 
for long commandlines, to overcome the 
80 chars limitations for Dos command lines.
  In its present form, it prints out lots of 
information, send_user can probably be changed to verbose
if someone just wants to use it.

  Eli, tell me if you get a chance to try it out.

Pierre


> -----Message d'origine-----
> De : Eli Zaretskii [mailto:eliz@gnu.org]
> Envoyé : Wednesday, June 17, 2009 7:17 PM
> À : 'Daniel Jacobowitz'
> Cc : muller@ics.u-strasbg.fr; brobecker@adacore.com; gdb-
> patches@sourceware.org
> Objet : Re: [RFC] Improve testsuite for poor expect behavior
> 
> > Date: Wed, 17 Jun 2009 09:36:26 -0400
> > From: 'Daniel Jacobowitz' <drow@false.org>
> > Cc: 'Joel Brobecker' <brobecker@adacore.com>, gdb-
> patches@sourceware.org
> >
> > I have not tried this on DJGPP at all.
> 
> You cannot try this with DJGPP, because there are no such APIs in
> DJGPP (with the exception of `setmode', which does exist).  Also,
> there are no pipes in DJGPP.
> 
> I cannot judge what would be needed for DJGPP, since Pierre did not
> yet explain how does he run DJGPP with the test suite, nor show any
> code that achieves that.  All I can say is that DJGPP has the
> `setmode' function that can be used to switch a standard handle into
> binary mode, and that `isatty' is available to detect whether a handle
> is connected to a terminal device.  Note that the DJGPP build of GDB
> generally does not always use file I/O functions to write to the
> terminal; it uses direct screen I/O for some ops.  Thus, binary mode
> file I/O not necessarily will solve the problem that bothers Pierre,
> although I do not yet understand fully whether it is relevant to DJGPP
> as it is to MinGW.
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