[Bug fortran/40675] Support -fnosign-zero for SIGN intrinsic for Fortran 77 compatibility

["gdsjaar at sandia dot gov" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #17 from gdsjaar at sandia dot gov  2009-07-08 21:03 -------
Subject: Re:  Support -fnosign-zero for SIGN
 intrinsic for Fortran 77 compatibility

Thanks for the quick response.  I agree that the ultimate fix is to 
remove that idiom from the code; however, when dealing with decades old 
fortran code, we don't always have the time or resources to do it 
right.   I will try to write a better test code next time that isn't 
buggy...

--Greg

burnus at gcc dot gnu dot org wrote:
> ------- Comment #16 from burnus at gcc dot gnu dot org  2009-07-08 20:55 -------
> Close as FIXED (on the trunk [= 4.5]).
>
> Greg, thanks for the report. Using a 4.5/trunk build (e.g. one of the nightly
> builds) gfortran will offer the option -fno-sign-zero  which allows your
> program to work.
>
> However, I still would like to suggest to change the program such that it will
> work also the default options. The problem will presumably also appear with
> other compilers - for instance if they change their default.
>
>
>   


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40675