[MacPorts] #69406: build shared-mime-info for deployment target 10.14 fails on macOS Sonoma

[MacPorts]

#69406: build shared-mime-info for deployment target 10.14 fails on macOS Sonoma
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  Reporter:  MStraeten         |      Owner:  mascguy
      Type:  defect            |     Status:  assigned
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:  2.9.1
Resolution:                    |   Keywords:
      Port:  shared-mime-info  |
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Comment (by kencu):

 legacysupport doesn't use {{{os.major}}} at all, nor are there any places
 where it would be useful to substitute {{{macosx_deployment_target}}}.

 It uses {{{__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__}}} for it's
 testing, which would be properly set by setting the deployment target when
 building legacysupport.

 The problem I see is how the replacements work ... making sure that when
 building something against legacysupport on a system that HAS the symbols,
 to have them link against and use the ones in legacysupport instead so
 that when deployed on a system that doesn't have the symbols, something
 will be found.

 And this is really not right either -- you would want the legacysupport
 library to only use the replacement symbols when needed, and use the
 system symbols if they exist, which means runtime testing, not build-time
 testing.

 IE -- a big project, to do it right, and not something I'm prepared to do,
 certainly.

 And taking into account the fact that 99% of all open source software also
 does not properly handle the case of building on a new system to deploy on
 an old system -- that is why I say just build the damned software on a VM
 of your desired lowest target, and be done with it ...

-- 
Ticket URL: <https://trac.macports.org/ticket/69406#comment:8>
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