[Bug fortran/26277] New: false warning abiout unused label

[Bug fortran/26277] New: false warning abiout unused label

[kloedej at knmi dot nl]

When compiling the following testprogram a false warning is issued about not
using the label.

program testlabel

  open(unit=12, file="dummy",status="old",&
       action="read",err=99)
  print *,"file is now open"
  stop

99 print *,"could not open file ..."

end program testlabel

I used the following command to compile: 

>gfortran -c Test.F90
 In file Test.F90:8

99 print *,"could not open file ..."
 1
Warning: Label 99 at (1) defined but not used
>

I used the following gfortran version:

>gfortran -v
Using built-in specs.
Target: i386-linux
Configured with: ../gcc/configure --prefix=/tmp/gfortran-20060212/irun
--enable-languages=c,fortran --host=i386-linux
--with-gmp=/tmp/gfortran-20060212/gfortran_libs
Thread model: posix
gcc version 4.2.0 20060212 (experimental)
>

best regards,

Jos de Kloe


-- 
           Summary: false warning abiout unused label
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: kloedej at knmi dot nl


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26277

[Bug fortran/26277] false warning abiout unused label

[tobi at gcc dot gnu dot org]

------- Comment #1 from tobi at gcc dot gnu dot org  2006-02-14 13:15 -------
Of course this needs -Wunused-labels, confirmed.


-- 

tobi at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tobi at gcc dot gnu dot org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2006-02-14 13:15:15
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26277

[Bug fortran/26277] false warning about unused label for a warning used in err=

[tobi at gcc dot gnu dot org]

-- 

tobi at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |tobi at gcc dot gnu dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2006-02-14 13:15:15         |2006-02-14 13:34:36
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26277

[Bug fortran/26277] false warning about unused label for a warning used in err=

[tobi at gcc dot gnu dot org]

------- Comment #2 from tobi at gcc dot gnu dot org  2006-02-14 15:34 -------
Patch here: http://gcc.gnu.org/ml/gcc-patches/2006-02/msg01063.html


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26277

[Bug fortran/26277] false warning about unused label for a warning used in err=

[tobi at gcc dot gnu dot org]

------- Comment #3 from tobi at gcc dot gnu dot org  2006-02-14 19:21 -------
Subject: Bug 26277

Author: tobi
Date: Tue Feb 14 19:21:07 2006
New Revision: 110993

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=110993
Log:
fortran/
        PR fortran/26277
        * io.c (match_ltag): Mark label as referenced.
testsuite/
        PR fortran/26277
        * gfortran.dg/label_4.f90: New.


Added:
    trunk/gcc/testsuite/gfortran.dg/label_4.f90
Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/io.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26277

[Bug fortran/26277] false warning about unused label for a warning used in err=

[tobi at gcc dot gnu dot org]

------- Comment #4 from tobi at gcc dot gnu dot org  2006-02-14 19:22 -------
Fixed.  This is not important enough to justify backporting to 4.1.


-- 

tobi at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.2.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26277

[Bug fortran/26277] false warning about unused label for a warning used in err=

[tobi at gcc dot gnu dot org]

------- Comment #5 from tobi at gcc dot gnu dot org  2006-03-19 15:09 -------
Subject: Bug 26277

Author: tobi
Date: Sun Mar 19 15:09:33 2006
New Revision: 112214

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=112214
Log:
2006-03-19  Tobias Schlueter  <tobias.schlueter@physik.uni-muenchen.de>

(backport r110993)
PR fortran/26277
* io.c (match_ltag): Mark label as referenced.

2006-03-19  Tobias Schlueter  <tobias.schlueter@physik.uni-muenchen.de>

        (backport r110993)
PR fortran/26277
* gfortran.dg/label_4.f90: New.

Added:
    branches/gcc-4_1-branch/gcc/testsuite/gfortran.dg/label_4.f90
      - copied unchanged from r110993,
trunk/gcc/testsuite/gfortran.dg/label_4.f90
Modified:
    branches/gcc-4_1-branch/gcc/fortran/ChangeLog
    branches/gcc-4_1-branch/gcc/fortran/io.c
    branches/gcc-4_1-branch/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26277

[Bug fortran/26277] false warning about unused label for a warning used in err=

[tobi at gcc dot gnu dot org]

------- Comment #6 from tobi at gcc dot gnu dot org  2006-03-19 15:10 -------
Recent discussion lead me to backport this to 4.1.


-- 

tobi at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.2.0                       |4.1.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26277