Bug#757492: gfortran-4.9: miscompiles int() on mips

[Matthias Klose <doko@debian.org>]

debian-mips, please handle this

Am 08.08.2014 um 21:40 schrieb Julian Taylor:
> Package: gfortran-4.9
> Version: 4:4.9.1-1
> Severity: important
> 
> gfortran miscompiles int() for negative overflows leading to a build
> timeout of python-scipy, see #756905
> below a testcase, according to
> https://gcc.gnu.org/onlinedocs/gfortran/INT.html the result should be
> -2147483648
> 
> (sid_mips-dchroot)jtaylor@gabrielli:~$ apt-cache  policy gfortran
> gfortran:
>   Installed: 4:4.9.1-1
>   Candidate: 4:4.9.1-1
>   Version table:
>  *** 4:4.9.1-1 0
>         500 http://mirror-ubc.debian.org/debian/ sid/main mips Packages
>         100 /var/lib/dpkg/status
> (sid_mips-dchroot)jtaylor@gabrielli:~$ cat test.f90
>       program add
>       implicit none
>       real a,b,s
>       read *, a
>       print *, ' is ' , int(a)
>       stop
>       end
> (sid_mips-dchroot)jtaylor@gabrielli:~$ gfortran test.f90
> (sid_mips-dchroot)jtaylor@gabrielli:~$ ./a.out
> -1e99
>   is   2147483647
> Note: The following floating-point exceptions are signalling:
> IEEE_INVALID_FLAG IEEE_OVERFLOW_FLAG
> 
>