qt5 @5.6.2_0: please re-enable builds on 10.7

[mojca (Mojca Miklavec)]

Commit d1509f4a/macports-ports disabled building Qt 5.6 on 10.7 even though it seems to build without any major problems and the packages from the buildbot confirm that (5.6.1 is there for darwin11).

Can we please reenable support for OS X 10.7 (for version 5.6).

See also #51801.

[mojca (Mojca Miklavec)]

The only problem I found so far comes from building qt5-qtmultimedia:

:info:build avfcamerautility.mm:549:92: error: property 'firstObject' not found on object of type 'NSArray *'
:info:build         AVFrameRateRange *range = captureDevice.activeFormat.videoSupportedFrameRateRanges.firstObject;
:info:build                                                                                            ^
:info:build 1 error generated.

[mojca (Mojca Miklavec)]

According to ​https://developer.apple.com/reference/avfoundation/avcapturedeviceformat/1387592-videosupportedframerateranges the function videoSupportedFrameRateRanges is 10.10+, so I'm confused.

In any case, all other qt5 modules (that I installed earlier) compiled successfully.

[MarcusCalhoun-Lopez (Marcus Calhoun-Lopez)]

In 742c8676/macports-ports:

qt5 PortGroup: allow installation attempt on
unsupported platforms, with a warning

Even though Qt 5.6 is not supported on Mac OS X 10.7, there has been
some success in building it.
Allow the installation attempt at least until there is consensus that
Qt will not work.

Fixes #52913

[mojca (Mojca Miklavec)]

Thank you. Here's a link to the build on ​10.7. See #52922.