[Bug fortran/34719] New: N_GSYM stabs warning with common blocks on Mac OS X Leopard

[Bug fortran/34719] New: N_GSYM stabs warning with common blocks on Mac OS X Leopard

[dojo at masterleep dot com]

Under Mac OS X Leopard using the prepackaged gfortran binaries from 12/31/2007,
any fortran program with a common block emits a N_GSYM stabs warning when
compiled in debug mode.  This is with the Leopard version of XCode (3.0).

$ cat test.f
        program test
        common nrange
        call firmssh(1)
        end

        subroutine firmssh(curmax)
        common nrange
        return
        end
$ gfortran -g -c test.f
$ gfortran test.o
can't find atom for N_GSYM stabs nrange:G(0,5) in test.o
can't find atom for N_GSYM stabs nrange:G(0,5) in test.o
ld: warning, duplicate dylib /usr/local/gfortran/lib/libgcc_s.1.dylib
$ gfortran --version
GNU Fortran (GCC) 4.3.0 20071231 (experimental) [trunk revision 131236]
Copyright (C) 2007 Free Software Foundation, Inc.

GNU Fortran comes with NO WARRANTY, to the extent permitted by law.
You may redistribute copies of GNU Fortran
under the terms of the GNU General Public License.
For more information about these matters, see the file named COPYING

$ ld -v
@(#)PROGRAM:ld  PROJECT:ld64-77


-- 
           Summary: N_GSYM stabs warning with common blocks on Mac OS X
                    Leopard
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dojo at masterleep dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34719

[Bug fortran/34719] N_GSYM stabs warning with common blocks on Mac OS X Leopard

[burnus at gcc dot gnu dot org]

------- Comment #1 from burnus at gcc dot gnu dot org  2008-01-08 23:33 -------
If I read http://gcc.gnu.org/ml/gcc-patches/2007-02/msg00735.html correctly, it
should work if you use -gdwarf-2 instead of -g.

My understanding is that it not a bug in GCC, but I might be wrong.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34719

[Bug target/34719] N_GSYM stabs warning with common blocks on Mac OS X Leopard

[fxcoudert at gcc dot gnu dot org]

------- Comment #2 from fxcoudert at gcc dot gnu dot org  2008-01-19 17:33 -------
Reproduced on powerpc-apple-darwin9.1.0, both with -m32 and -m64. It happens
with stabs, but not with dwarf.

$ gfortran -gstabs test.f -g -m32
can't find atom for N_GSYM stabs nrange:G(0,5) in /var/tmp//cco3n4ye.o
can't find atom for N_GSYM stabs nrange:G(0,5) in /var/tmp//cco3n4ye.o
$ gfortran -gstabs test.f -g -m64
can't find atom for N_GSYM stabs nrange:G(0,5) in /var/tmp//ccHIBm2j.o
can't find atom for N_GSYM stabs nrange:G(0,5) in /var/tmp//ccHIBm2j.o

Marked as wrong-debug and assigned to "target" component.


-- 

fxcoudert at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |fxcoudert at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
          Component|fortran                     |target
     Ever Confirmed|0                           |1
  GCC build triplet|                            |*-apple-darwin89
   GCC host triplet|                            |*-apple-darwin89
 GCC target triplet|                            |*-apple-darwin89
           Keywords|                            |wrong-debug
   Last reconfirmed|0000-00-00 00:00:00         |2008-01-19 17:33:04
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34719

[Bug target/34719] N_GSYM stabs warning with common blocks on Mac OS X Leopard

[fago at caltech dot edu]

------- Comment #3 from fago at caltech dot edu  2008-01-29 19:36 -------
This also happens on 4.2.2 It is indeed fixed by using -gdwarf-2.

So should gcc set the type of debug information differently on Leopard, or is
it Apple's issue? If the former, it seems like it should be straight-forward;
will it make it into 4.2.3?

Thanks,
Matt


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34719

[Bug target/34719] N_GSYM stabs warning with common blocks on Mac OS X Leopard

[fxcoudert at gcc dot gnu dot org]

------- Comment #4 from fxcoudert at gcc dot gnu dot org  2008-01-29 19:45 -------
(In reply to comment #3)
> will it make it into 4.2.3?

No way: the release process for 4.2.3 has started:
http://gcc.gnu.org/ml/gcc/2008-01/msg00477.html


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34719

[Bug target/34719] N_GSYM stabs warning with common blocks on Mac OS X Leopard

[fago at earthlink dot net]

------- Comment #5 from fago at earthlink dot net  2008-01-29 19:47 -------
So it is a gcc issue -- seems like it will have to wait for 4.4 then? Easy
enough work-around I guess. Thanks!


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34719