[MacPorts] #62645: py*-pykerberos @1.2.1: error: implicit declaration of function 'mempcpy' is invalid in C99

[MacPorts]

#62645: py*-pykerberos @1.2.1: error: implicit declaration of function 'mempcpy' is
invalid in C99
----------------------------+-----------------------------
  Reporter:  cooljeanius    |      Owner:  (none)
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.6.4
Resolution:                 |   Keywords:  bigsur catalina
      Port:  py-pykerberos  |
----------------------------+-----------------------------

Comment (by ryandesign):

 As far as I can find out, `mempcpy` is not a standard function and it does
 not exist on macOS. The developers of pykerberos would need to provide an
 implementation of it. For example there is an implementation of it in
 gnulib: https://www.gnu.org/software/gnulib/manual/html_node/mempcpy.html

 Nevertheless, the build succeeds with just a warning when using Xcode 11
 or earlier. I don't understand why the build succeeds or where it's
 getting an implementation of `mempcpy` from.

 I would like to report this problem to the developers of pykerberos so
 that they can fix it but I cannot figure out where their homepage or bug
 tracker are located. They are not mentioned in the README or on the pypi
 page.

 What is mentioned in the README is this:

 > NOTE: this fork of ccs-kerberos is currently on life support mode as
 Apple has resumed work on upstream. Please try to use
 https://pypi.python.org/pypi/kerberos instead of this fork if possible.

 So perhaps we should switch to that. Perhaps Apple has already fixed the
 problem in their version. Apple's version is:

 https://github.com/apple/ccs-pykerberos

 At least I do not find any occurrences of `mempcpy` when I search that
 repo using the GitHub web site.

 I don't find any ports depending on py*-pykerberos so at least switching
 should not impact any other ports.

-- 
Ticket URL: <https://trac.macports.org/ticket/62645#comment:2>
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