[Bug fortran/31124] New: Warn of unused PRIVATE module variables/procedures

[Bug fortran/31124] New: Warn of unused PRIVATE module variables/procedures

[burnus at gcc dot gnu dot org]

As suggested at
http://groups.google.com/group/comp.lang.fortran/browse_thread/thread/a19c9fdd1503e9c5/

While gfortran does not has this kind of warning, g95 -Wextra warns:

In file crud.f90:5
integer, parameter :: one = 1
                      1
Warning (159): PARAMETER 'one' at (1) is never used
In file crud.f90:11
subroutine bar()
           1
Warning (167): PRIVATE module procedure 'bar' at (1) is never invoked

for the following file


module crud_mod
implicit none
private
public :: foo
integer, parameter :: one = 1
contains
subroutine foo()
print*,"foo"
end subroutine foo
!
subroutine bar()
print*,"bar"
end subroutine bar
end module crud_mod


-- 
           Summary: Warn of unused PRIVATE module variables/procedures
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: diagnostic
          Severity: enhancement
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: burnus at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31124

[Bug fortran/31124] Warn of unused PRIVATE module variables/procedures

[terry at chem dot gu dot se]

------- Comment #1 from terry at chem dot gu dot se  2007-03-11 01:57 -------
I've filed #31129 specifically for the parameter case.  This is unrelated to
the private attribute.


-- 

terry at chem dot gu dot se changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |terry at chem dot gu dot se


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31124

[Bug fortran/31124] Warn of unused PRIVATE module variables/procedures

[fxcoudert at gcc dot gnu dot org]

-- 

fxcoudert at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2007-03-18 18:10:44
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31124

[Bug fortran/31124] Warn of unused PRIVATE module variables/procedures

[terry at chem dot gu dot se]

------- Comment #2 from terry at chem dot gu dot se  2007-11-15 10:19 -------
*** Bug 34092 has been marked as a duplicate of this bug. ***


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31124

[Bug fortran/31124] Warn of unused PRIVATE module variables/procedures

[terry at chem dot gu dot se]

------- Comment #3 from terry at chem dot gu dot se  2007-11-15 10:27 -------
(In reply to comment #2)
> *** Bug 34092 has been marked as a duplicate of this bug. ***
> 

So, to summarise:  Unused parameters have been fixed in general, but unused
private module entities remain undetected (as of 4.3.0 20071109).  (There must
surely be a piece of code excluding module variables from unused warnings? 
That needs to be taught about the private attribute.)


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31124