[Octave-bug-tracker] [bug #49098] linear algebra: compiler warnings on build of pgmres.cc

[Mike Miller]

Update of bug #49098 (project octave):

                Severity:              3 - Normal => 2 - Minor              
                Priority:              5 - Normal => 3 - Low                
              Item Group:    Installation Failure => Other                  
                  Status:               Need Info => Confirmed              
        Operating System:       Microsoft Windows => Any                    
                 Summary: Warnings while installing  linear algebra package =>
linear algebra: compiler warnings on build of pgmres.cc

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Follow-up Comment #3:

Ok, no response, assuming this is just reporting the compiler warnings on
installation. Here is a full log of warnings I see when built with the same
warning flags as Octave is:


pgmres.cc: In function ‘octave_value_list Fpgmres(const octave_value_list&,
int)’:
pgmres.cc:151:41: warning: ‘octave_idx_type Array<T>::length() const [with T
= double; octave_idx_type = int]’ is deprecated: use 'numel' instead
[-Wdeprecated-declarations]
                   V = Matrix (b.length (), 1, 0.0);
                                         ^
In file included from
/opt/gnu/octave/include/octave-4.2.0-rc2/octave/../octave/Sparse.h:37:0,
                 from
/opt/gnu/octave/include/octave-4.2.0-rc2/octave/../octave/MSparse.h:31,
                 from
/opt/gnu/octave/include/octave-4.2.0-rc2/octave/../octave/MatrixType.h:29,
                 from
/opt/gnu/octave/include/octave-4.2.0-rc2/octave/../octave/mx-base.h:30,
                 from
/opt/gnu/octave/include/octave-4.2.0-rc2/octave/../octave/Matrix.h:32,
                 from
/opt/gnu/octave/include/octave-4.2.0-rc2/octave/../octave/oct.h:30,
                 from pgmres.cc:16:
/opt/gnu/octave/include/octave-4.2.0-rc2/octave/../octave/Array.h:354:19:
note: declared here
   octave_idx_type length (void) const { return numel (); }
                   ^~~~~~
pgmres.cc:188:14: warning: deleting object of abstract class type
‘matrixfreematrix’ which has non-virtual destructor will cause undefined
behavior [-Wdelete-non-virtual-dtor]
       delete A;
              ^
pgmres.cc:189:14: warning: deleting object of abstract class type
‘matrixfreematrix’ which has non-virtual destructor will cause undefined
behavior [-Wdelete-non-virtual-dtor]
       delete invP;
              ^~~~
pgmres.cc:68:34: warning: unused parameter ‘nargout’ [-Wunused-parameter]
 \n   x0 the initial guess and \
                                  ^      


Left to the package maintainer's discretion to fix or not, low priority.

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