[task #16288] Warp: warn users when WCSLIB version is <7.12

[Pedram Ashofteh-Ardakani]

URL:
  <https://savannah.gnu.org/task/?16288>

                 Summary: Warp: warn users when WCSLIB version is <7.12
                 Project: GNU Astronomy Utilities
               Submitter: pedram
               Submitted: Wed 07 Dec 2022 08:52:13 PM UTC
         Should Start On: Wed 07 Dec 2022 12:00:00 AM UTC
   Should be Finished on: Wed 07 Dec 2022 12:00:00 AM UTC
                Category: Warp
                Priority: 5 - Normal
              Item Group: Crash
                  Status: None
                 Privacy: Public
        Percent Complete: 0%
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
                  Effort: 0.00


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Follow-up Comments:


-------------------------------------------------------
Date: Wed 07 Dec 2022 08:52:13 PM UTC By: Pedram Ashofteh-Ardakani <pedram>
Sepideh and Mohammad have already let Mark Callabreta know that WCSLIB 7.11
fails when calculating specific coordinates. He has fixed it in WCSLIB 7.12,
and in the changelog pointed out:
<https://www.atnf.csiro.au/people/mcalabre/WCS/CHANGES>

>  - In wcsp2s() and wcss2p(), fixed handling of status returns from
>    linp2x() and linx2p() relating to distortion functions, specifically
>    with respect to setting the stat[] vector.  Reported by Sepideh
>    Eskandarlou (via Mohammad Akhlaghi).

That is why we have put a warning in Warp's documentation about this and
encouraged users to install at least WCSLIB 7.12. However, some might simply
miss this important warning. Hence, we should check user's WCSLIB version
while running warp, and print a warning to prevent bad results.









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