[MacPorts] #63468: libde265 @1.0.8 fails to build on 10.5 i386

[MacPorts]

#63468: libde265 @1.0.8 fails to build on 10.5 i386
------------------------+--------------------
  Reporter:  fhgwright  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.7.1
Resolution:             |   Keywords:
      Port:  libde265   |
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Comment (by kencu):

 This issue goes back a few years now, and there are a number other tickets
 with the same error. Riccardo was running into this quite often, pushing
 the envelope as he did back then (he has since moved on to Linux, mostly,
 which is why we don't see Riccardo around here much any more).

 The way legacysupport was set up in 2018, certain symbols were redefined
 to the new, fixed ones we wanted to use. At the time, this was just fine
 to do. But things then changed in the compiler world.

 gcc still allows it, but as of a certain point, clang-7.0+ decided to
 disallow redefining symbols and make it an error.

 If you build your port with gcc or with clang-6.0 or less, it will
 probably build OK (symbol redefinition is still allowed there).

 Of late, MacPorts defaults to building with clang-7.0 if the gcc compilers
 have been disallowed.

 I know how to reverse the change in clang-7.0+ to allow symbol
 redefinition again to "fix" this. I suggested doing that a year or two ago
 but was over-ruled and told that was a poor plan. We were supposed to redo
 legacysupport's symbol changing plan instead.

 I don't have time or plans to ever do that, so I was going to go ahead and
 reverse the commit that disabled symbol redefinition on clang-7.0+ anyway,
 at least on < 10.6 where this is relevant.

 For now, try building this port with some clang < 7, or with gcc, and it
 *should* build. Please report back if it does or doesn't.

-- 
Ticket URL: <https://trac.macports.org/ticket/63468#comment:2>
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