https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68940
Bug ID: 68940
Summary: -Wno-error=compare-reals not working
Product: gcc
Version: 5.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: jahns at dkrz dot de
Target Milestone: ---
When combining the -Werror -Wextra -Wno-error=compare-reals options, code that
compares reals does still produce an error. Given the following example program
and compiler options, I was able to reproduce this behaviour with gfortran
5.1.0, 4.9.2 and 4.8.2:
$ cat gfortran-werror-wcompare-reals.f90
PROGRAM cmpreal
REAL :: a, b
READ *, a, b
IF (a == b) PRINT *, 'equal'
END PROGRAM cmpreal
$ gfortran -Werror -Wextra -Wno-error=compare-reals -c -o
gfortran-werror-wcompare-reals.o gfortran-werror-wcompare-reals.f90
gfortran-werror-wcompare-reals.f90:4.6:
IF (a == b) PRINT *, 'equal'
1
Warning: Equality comparison for REAL(4) at (1)
$ echo $?
1
$
I think that this means -Wno-error=compare-reals does not reduce the
corresponding warning to only produce a warning.
