Re: Namespaces with gcc v3 stabs+?

[Michael Elizabeth Chastain <mec at shout dot net>]

David Carlton writes:
> So for now I'd lean towards getting GCC to emit stabs+ info as it did
> in 2.95.3: that should be cheap on everybody's part, and profitable
> enough.

Sounds good to me.  If that's okay with drow, then that's what I'll
request in the bug report.

If gcc doesn't fix the bug at all, then I can point to the bug report
and mark the test case as "xfail".  My view is that, since "xfail" is
caused by a bug in an external program, we'd better have a bug report
to go with it.

> What systems are there that GCC supports for which stabs+ can be used
> but DWARF 2 can't?  How important are they?  Who's supporting them?
> Are there other more modern debug formats that really should be used
> on those systems in place of stabs?

If the user builds gcc with "--with-stabs", gcc prefers dbx
(the gcc name for stabs).  Besides that, there are about 90 configurations
which default to dbx, most of them without dwarf2 support.  Darwin and
Cygwin are the big ones, with some arm configurations in there.

Michael C

  % cd /berman/migchain/source/gcc-3.2.1/gcc/config
  % grep -r -i dbx_debug *

I found these configurations which prefer dbx:

  darwin.h             dbx, dwarf2
  interix.h            dbx, sdb
  lynx-ng.h            dbx, sdb
  lynx.h               dbx, sdb
  netware.h            dbx
  nextstep.h           dbx
  psos.h               dbx

  alpha/linux-ecoff.h  dbx
  alpha/openbsd.h      dbx
  arc/arc.h            dbx, dwarf-2
  arm/aout.h           dbx
  arm/coff.h           dbx, sdb
  arm/netbsd.h         dbx
  arm/rix-gas.h        dbx
  avr/avr.h            dbx
  convex/convex.h      dbx
  cris/aout.h          dbx
  d30v/d30v.h          dbx
  i386/cygwin.h        dbx, sdb
  i386/i386elf.h       dbx
  i386/gstabs.h        dbx
  i386/i386-interix.h  dbx, sdb
  i386/osf1elfgdb.h    dbx
  i386/osfrose.h       dbx
  i386/sco5.h          dbx, sdb, dwarf, dwarf-2
  i386/sequent.h       dbx
  i386/sol2.h          dbx
  i386/sun.h           dbx
  i386/svr3dbx.h       dbx
  i386/win32.h         dbx, sdb
  i860/bsd.h           dbx
  i860/fx2800.h        dbx
  i960/i960.h          dbx, sdb
  m32r/m32r.h          dbx, dwarf, dwarf-2
  m68k/3b1g.h          dbx
  m68k/altos3068.h     dbx
  m68k/ccur-GAS.h      dbx
  m68k/hp2bsd.h        dbx
  m68k/hp310g.h        dbx
  m68k/hp320g.h        dbx
  m68k/hp3bsd.h        dbx
  m68k/hp3bsd44.h      dbx
  m68k/isi.h           dbx
  m68k/linux.h         dbx
  m68k/linux-aout.h    dbx
  m68k/m68kv4.h        dbx
  m68k/netbsd.h        dbx
  m68k/news.h          dbx
  m68k/openbsd.h       dbx
  m68k/pbb.h           dbx
  m68k/sun2.h          dbx
  m68k/sun3.h          dbx
  m68k/vxm68k.h        dbx
  m88k/aout-dbx.h      dbx
  m88k/luna.h          dbx
  m88k/m88k-aout.h     dbx
  mcore/mcore-pe.h     dbx
  mips/dec-bsd.h       dbx
  mips/elf.h           dbx, dwarf-2
  mips/elf64.h         dbx
  mips/iris5gas.h      dbx, sdb, mips
  mips/isa3264.h       dbx
  mips/netbsd.h        dbx
  mips/openbsd.h       dbx
  mips/osfrose.h       dbx
  mn10200/mn10200.h    dbx
  ns32k/merlin.h       dbx
  ns32k/netbsd.h       dbx
  ns32k/pc532.h        dbx
  ns32k/sequent.h      dbx
  ns32k/tek6000.h      dbx
  pa/pa.h              dbx
  romp/romp.h          dbx
  rs6000/netbsd.h      dbx
  rs6000/vxppc.h       dbx
  sparc/linux64.h      dbx, dwarf2
  sparc/litecoff.h     dbx
  sparc/netbsd.h       dbx
  sparc/openbsd.h      dbx
  sparc/pbd.h          dbx
  sparc/sol2-bi.h      dbx # if TARGET_ARCH32
  sparc/sol2.h         dbx
  sparc/sparc.h        dbx
  sparc/vxsim.h        dbx
  sparc/vxsparc64.h    dbx
  v850/v850.h          dbx
  vax/vax.h            dbx
  vax/vaxv.h           dbx