Re: compilation warnings in liboctave/CMatrix.cc

[CdeMills]

John W. Eaton wrote:
> 
> On 13-Jan-2011, CdeMills wrote:
> 
> I'd be happy to see those warnings disappaear.  Propose a patch...
> 
> 

Another group of problems.
../../liboctave/CmplxLU.cc: In constructor 'ComplexLU::ComplexLU(const
ComplexMa
trix&)':
../../liboctave/CmplxLU.cc:72: warning: variable 'mn' might be clobbered by
'lon
gjmp' or 'vfork'
../../liboctave/CmplxLU.cc: In constructor 'ComplexLU::ComplexLU(const
ComplexMa
trix&)':
../../liboctave/CmplxLU.cc:72: warning: variable 'mn' might be clobbered by
'lon
gjmp' or 'vfork'

Origin:
  octave_idx_type a_nr = a.rows ();
  octave_idx_type a_nc = a.cols ();
  octave_idx_type mn = (a_nr < a_nc ? a_nr : a_nc);

To make this message disappear, one option is to declare mn volatile, but
then there is a big penalty at the loop at the end of the constructor. Any
idea why this message is produced ?

Regards

Pascal
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