[daip] Installing AIPS with gcc/gfortran-7 vs. gcc/gfortran-6

[Eric Greisen]

On 09/25/2018 04:42 AM, Vasaant Krishnan wrote:
> Hello Eric,
> 
> I've encountered and fixed the following issue with my AIPS 
> installation, which I thought I should flag to you.
> 
> 1. I'm on an Ubuntu 18.04 system, running gcc/gfortran-7.
> 
> 2. When I performed manual delay calibration on my LBA dataset using 
> 31DEC18 FRING was consistently giving me
> 
>     Found        4 good solutions
>     Failed on       16 solutions
> 
>      on all of my calibrator scans.
> 
> 3. I installed 31DEC17 and the problem persisted.
> 
> 4. When contacted Cormac Reynolds, he obtained
> 
>     Found        20 good solutions
>     Failed on       0 solutions
> 
>      using the same FRING parameters on 31DEC17. Cormac asked me to run, 
> mnj, to update my system and/or to reinstall AIPS. None of these worked.
> 
> 5. I installed gcc/gfortran-6 on my Ubuntu 18.04 system, which fixed the 
> problem with FRING. As a test I reinstalled AIPS using gcc/gfortran-7 
> and the problem returned.
> 
> 
> Vasaant
> 
> -- 
> Vasaant Krishnan, PhD
> Junior Commissioning Scientist
> 4th Floor, The Park
> Park Rd
> Oude Molen Village
> Cape Town 7405
> South Africa

Thank you for the warning.  If I decide that we have to move on to 
Fortran 7, I will test it thoroughly before releasing it.  It will be a 
long time until Fortran 6.4 is viewed as obsolete.

Thanks again

Eric Greisen