[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 satraul):

 My bad, I've confused the two. I submitted it because it built qt5-qtbase
 successfully. But let me get this straight first before submitting a fix..
 so this line
 {{{
                 if { ![file exists
 ${sdks_dir}/MacOSX${configure.sdk_version}.sdk] } {
                     configure.sdk_version
                 }
 }}}
 Clears `configure.sdk_version`? What is the purpose of this? In my
 understanding, it's checking to see if current version's SDK doesn't exist
 and if so "clear" it (which I assume is so qt can find the SDK by itself).

 In Clemens' patch, to avoid running (clearing) `configure.sdk_version`:
 1. Current version's SDK must be in Xcode's folder
 2. If MacPorts is using CLT as Developer_Dir, current version's SDK must
 be in CLT folder

 Why should we have both conditions met? Please correct my understanding.

-- 
Ticket URL: <https://trac.macports.org/ticket/58779#comment:15>
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