[Bug debug/39104] New: stabs debug info fails onIRIX 5.3

[Bug debug/39104] New: stabs debug info fails onIRIX 5.3

[J dot J dot vanderHeijden at gmail dot com]

On IRIX 5.3, stabs debug info is embedded in ECOFF. Beginning with gas 2.13,
-mdebug must be passed to correctly handle COFF debugging info. GCC does not do
this.

The result is a lot of stabs related failures:
http://gcc.gnu.org/ml/gcc-testresults/2009-01/msg02896.html

A possible solution is to add %{gstabs*:-mdebug} %{!gstabs*:-no-mdebug} to
SUBTARGET_ASM_DEBUGGING_SPEC, but only for an IRIX5 target, and only when using
GAS.


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           Summary: stabs debug info fails onIRIX 5.3
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: J dot J dot vanderHeijden at gmail dot com
 GCC build triplet: mips-sgi-irix5.3
  GCC host triplet: mips-sgi-irix5.3
GCC target triplet: mips-sgi-irix5.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39104

[Bug debug/39104] stabs debug info fails onIRIX 5.3

[J dot J dot vanderHeijden at gmail dot com]

------- Comment #1 from J dot J dot vanderHeijden at gmail dot com  2009-02-05 11:36 -------
Created an attachment (id=17244)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17244&action=view)
Call GAS with -mdebug when using stabs, do not emit .stabd directives

With this patch applied, stabs related failures al go away,

                === g++ Summary ===

# of expected passes            18090
# of unexpected failures        13
# of unexpected successes       1
# of expected failures          141
# of unsupported tests          225
/build53/gcc/gcc-trunk/obj-quick/gcc/testsuite/g++/../../g++  version 4.4.0
20090202 (experimental) [trunk revision 143874] (GCC) 


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39104

[Bug debug/39104] stabs debug info fails onIRIX 5.3

[ro at gcc dot gnu dot org]

------- Comment #2 from ro at gcc dot gnu dot org  2010-04-21 14:11 -------
Mine.


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ro at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |ro at gcc dot gnu dot org
                   |dot org                     |
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2010-04-21 14:11:29
               date|                            |
            Summary|stabs debug info fails      |stabs debug info fails
                   |onIRIX 5.3                  |onIRIX 5.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39104

[Bug debug/39104] stabs debug info fails onIRIX 5.3

[ro at CeBiTec dot Uni-Bielefeld dot DE]

------- Comment #3 from ro at CeBiTec dot Uni-Bielefeld dot DE  2010-04-21 14:24 -------
Subject: Re:  stabs debug info fails onIRIX 5.3

I don't think this is a gcc bug.  While the native IRIX 5 tools use
ECOFF debugging info embedded in ELF (mdebug), they don't know about
Stabs-in-ECOFF/mdebug which is a GCC extension which IRIX 5 gdb cannot
handle.  Therefore it seems to be more useful to use Stabs-in-ELF
instead of Stabs-in-ECOFF/mdebug instead, like gas on IRIX 6 does.

In fact, I've got a patch to gas to do so.  It seems like gas cannot
properly handle the case where ECOFF_DEBUGGING_INFO isn't a compile time
constant, but can change at runtime based on the -mdebug/-no-mdebug
switch.  Once this is properly tested, I'll submit it to the gas
maintainers and update this PR accordingly.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39104