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From: Daniel Jacobowitz <drow@mvista.com> To: nobody@gcc.gnu.org Cc: gcc-prs@gcc.gnu.org, Subject: Re: debug/1621: Debugging with complex numbers Date: Wed, 11 Dec 2002 17:26:00 -0000 [thread overview] Message-ID: <20021212012602.23447.qmail@sources.redhat.com> (raw) The following reply was made to PR debug/1621; it has been noted by GNATS. From: Daniel Jacobowitz <drow@mvista.com> To: Jim Wilson <wilson@redhat.com> Cc: Wolfgang Bangerth <bangerth@ticam.utexas.edu>, "Joseph S. Myers" <jsm28@cam.ac.uk>, bangerth@dealii.org, gcc-bugs@gcc.gnu.org, gcc-gnats@gcc.gnu.org Subject: Re: debug/1621: Debugging with complex numbers Date: Wed, 11 Dec 2002 20:22:45 -0500 On Wed, Dec 11, 2002 at 07:05:47PM -0500, Jim Wilson wrote: > About the $imag, $real stuff in the gcc/doc/extend.texi file... > The part about "None of the supported debug info formats..." is obsolete. > DWARF2 location descriptions can handle this easily, and this is already > supported in dwarf2out.c. Perhaps also DWARF, but I don't care enough to look > it up. The stabs hack of emitting two foo$imag and foo$real symbols is ugly > and should be discouraged. I don't think it makes any sense to teach gdb > about this hack. We should instead encourage use of DWARF2, which we are > already doing. I agree. > I tried writing a patch to make gcc use the Solaris 'R' stab letter extension. > > This brings up a number of questions. Sun only defined 3 float and 3 complex > float types. However, we have 7 float types and 6 complex float types. (They > should be the same, but that is a different problem.) Do we extend the > Solaris extension to meet our needs? Or fall back on the problematic 'r' > letter when we can't use 'R'? Extending 'R' might make us incompatible with > Sun if in the future Sun extends it too, so trying to discuss it with Sun is > a good idea. Or perhaps invent our own similar extension that won't conflict > with Sun? First of all, for floating point types we could just continue to use 'r'. It's not problematic in that case. On the other hand consistency is nice. I recommend emitting just the generic NF_COMPLEX and NF_FLOATING (?) for any of the unknown types. GDB only uses the type to determine if it is a floating or complex type, so that will suffice. -- Daniel Jacobowitz MontaVista Software Debian GNU/Linux Developer
next reply other threads:[~2002-12-12 1:26 UTC|newest] Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top 2002-12-11 17:26 Daniel Jacobowitz [this message] -- strict thread matches above, loose matches on Subject: below -- 2002-12-28 10:59 jsm28 2002-12-13 11:26 Joseph S. Myers 2002-12-13 9:32 wilson 2002-12-12 14:16 Jim Wilson 2002-12-12 13:36 Jim Wilson 2002-12-12 11:56 Daniel Jacobowitz 2002-12-12 7:56 Jim Wilson 2002-12-11 16:16 Jim Wilson 2002-12-09 12:24 bangerth 2002-12-07 17:26 Daniel Jacobowitz 2002-12-05 16:16 Wolfgang Bangerth 2002-12-05 15:26 Joseph S. Myers 2002-12-05 12:09 bangerth 2001-04-01 0:00 Joseph Myers
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