[MacPorts] #58779: base: ports cannot use SDK inside of Developer dir unless using Xcode build type

[MacPorts]

#58779: base: ports cannot use SDK inside of Developer dir unless using Xcode build
type
---------------------+-----------------------
  Reporter:  Ionic   |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  base    |    Version:  2.5.99
Resolution:          |   Keywords:  tracemode
      Port:          |
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Comment (by jmroot):

 Replying to [comment:2 Ionic]:
 > [6b27854906b3c19d209c50ff59a4fa78d42f3a03/macports-base] only set
 `use_xcode` to `true` if CLTs are not installed, but that's not relevant
 in this case.

 If you install both Xcode and the CLT then you won't have
 /Library/Developer/CommandLineTools/usr/bin/make, or at least I don't. If
 there is a case where that exists but the SDK inside Xcode is still used,
 that would be a problem.

 > Arguably, I guess we could tell qmake to use `/` as the SDK root if
 `configure.sdkroot` turns out to be empty... but do we really want this?

 That would match what is done elsewhere. Using the headers in /usr/include
 is safer than using the SDK in Xcode because the latter could be for a
 newer OS version, which causes problems with build-time detection of
 features.

-- 
Ticket URL: <https://trac.macports.org/ticket/58779#comment:3>
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