[AstroPy] pywcs 1.10-4.7 install failure on Microsoft Windows

[Mark Sienkiewicz]

On 12/25/11 16:25, Tim Jenness wrote:
> On Sun, Dec 25, 2011 at 6:29 AM, Rahul Patel<rahpatel at ic.sunysb.edu>  wrote:
>> Ya.... I'm not really comfortable with commenting or changing that out.I
>> really wish there were some way for this to work.
>>
> The real fix is for pywcs to be modified so that it does not use a
> fucntion called wcsset() otherwise this clash is going to continue.
>


The problem is actually in the C code for wcslib, the library that pywcs is based on.  wcslib defines a function named wcsset (see pywcs/wcslib/C/wcs.c).  I seem to remember Mike Droettboom telling me that he has to patch wcslib every time he incorporates a new version into pywcs.

If you are in a hurry to make pywcs work, I can suggest either a hack around the problem (as has been discussed) or use an earlier version of pywcs from before the integration of wcslib-4.8 began.

I seem to remember that the pywcs that was include in STSCI_PYTHON 2.12 compiled on Windows.  You can download source code for stsci_python from http://www.stsci.edu/resources/software_hardware/stsci_python/current/download and then install only the pywcs package instead of the entire distribution.  Just "cd pywcs ; python setup.py install".

If it is not urgent, Mike can probably give you a more satisfactory solution when he comes back from the holidays.

Mark S.