[MacPorts] #56495: gstreamer1-gst-plugins-base @1.14.1 +universal: error: -fobjc-arc is not supported on platforms using the legacy runtime

[MacPorts]

#56495: gstreamer1-gst-plugins-base @1.14.1 +universal: error: -fobjc-arc is not
supported on platforms using the legacy runtime
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  Reporter:  ryandesign                   |      Owner:  (none)
      Type:  defect                       |     Status:  new
  Priority:  Normal                       |  Milestone:
 Component:  ports                        |    Version:
Resolution:                               |   Keywords:  legacy-os
      Port:  gstreamer1-gst-plugins-base  |
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Comment (by Ionic):

 Replying to [comment:11 ryandesign]:
 > The build failures occurred on the buildbot, which was building
 gstreamer1-gst-plugins-base universal as a dependency of wine. You can see
 in the [https://packages.macports.org/gstreamer1-gst-plugins-
 base/gstreamer1-gst-plugins-base packages directory] that binaries didn't
 get produced with the universal variant for darwin 13 and 14.

 Yes, that makes perfect sense, but I wasn't talking about Darwin 13 and
 14. The buildbot infrastructure did produce `+universal` builds for Darwin
 15, 16 and 17 and I don't understand how that would have worked in the
 first place. I suspect that Cocoa support was determined as unavailable by
 configure (since we [incorrectly] don't use `--enable-cocoa` as the
 default configure option and configure defaults to a enable-if-available-
 otherwise-disable autodetection if a parameter is not explicitly
 provided), which lead to the problematic code being skipped.

 We were already explicitly disabling Cocoa support for platforms < Darwin
 13, so that explains why we have `+universal` builds for such older
 systems.


 > It seems that full ARC support is available on 10.7 and later while 10.6
 only has "ARCLite". Apparently the difference is that ARCLite does not
 have zeroing weak references. I don't know whether that difference is
 important to gstreamer1-gst-plugins-base but we can try it out.

 Probably not. If it is, we can still adjust the checks.

 > ARC is also only supported on x86_64 so in addition to conflicting with
 the universal variant you would want to verify that `configure.build_arch`
 is x86_64.

 Yeah, I'm doing exactly this (well, using `${build_arch}` instead of
 `${configure.build_arch}`). Did you miss my patch-for-review in the latest
 comment?

-- 
Ticket URL: <https://trac.macports.org/ticket/56495#comment:12>
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