[MacPorts] #68343: ffmpeg configure fails, clang unable to create executables

[MacPorts]

#68343: ffmpeg configure fails, clang unable to create executables
---------------------------+----------------------
  Reporter:  ShadSterling  |      Owner:  (none)
      Type:  defect        |     Status:  reopened
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.8.1
Resolution:                |   Keywords:
      Port:  ffmpeg        |
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Comment (by cjones051073):

 Replying to [comment:12 kencu]:
 > Chris, so this is twice now this issue shows up, where a user has Xcode
 15 installed but also has out of date command line tools, so this error
 comes up when the -ld_classic flag is sent to the older ld in the CLTs
 that doesn't understand it.
 >
 > I can't think of any good fix other than noticing the issue in their
 logs and telling people to update their CLTs, but Ryan is asking for one.
 >
 > Can you think up some magic incantation to get past this issue?

 I guess in principle it would be possible to query the CLT and xcode
 vesions, using something similar to what I do here

 https://github.com/macports/macports-
 ports/blob/master/lang/gcc13/Portfile#L174

 to detect when to apply the flag in gcc builds.

 It probably though would not make sense to do this at the port level, so
 its something someone would have to propose adding to base (perhaps adding
 it to port diagnose).

 That though will take a long time to get to users, and by then who knows
 perhaps Apple would have fixed the issue anyway...

 Until then, I think it is just a cause of being aware of this and looking
 out for it..

-- 
Ticket URL: <https://trac.macports.org/ticket/68343#comment:15>
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