[Bug fortran/44055] New: Warn (-Wconversion*) when converting single to double precision

["burnus at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

With the patch http://gcc.gnu.org/ml/fortran/2010-05/msg00067.html (for PR
27866, PR 35003, PR 42809) the number of conversion warnings has drastically
been cut down by drastically cutting down the number of unintended warnings.
However, it no longer warns for

  real(8) :: sqrt2
  sqrt2 = sqrt(2.0)

where one has the precision loss due to forgetting to use "2.0_8" / "2.0d0"
instead of "2.0"; cf. PR 27866.

The idea is to add another -W* flag which finds those problems. Finding the
corresponding -W* flag will be made easier using PR 44054.

I think both the -Wconversion and the new -Wconversion-* warning should be
enabled with -Wall.


-- 
           Summary: Warn (-Wconversion*) when converting single to double
                    precision
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Keywords: diagnostic
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: burnus at gcc dot gnu dot org
 BugsThisDependsOn: 44054


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44055