[MacPorts] #39699: Unable to build due to unknown compiler version?

[MacPorts]

#39699: Unable to build due to unknown compiler version?
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  Reporter:  frankdmartinez@…  |      Owner:  macports-tickets@…
      Type:  defect            |     Status:  new
  Priority:  Normal            |  Milestone:
 Component:  base              |    Version:  2.1.3
Resolution:                    |   Keywords:
      Port:                    |
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Comment (by frankdmartinez@…):

 Replying to [comment:9 larryv@…]:
 > Does these commands return anything?
 > {{{
 > % which -a clang
 > % xcrun -verbose -find clang
 > }}}
 They return
 >/usr/local/bin/clang
 and
 >xcrun via xcrun (xcrun)
 >DEVELOPER_DIR = '/Developer' via '/usr/share/xcode-select/xcode_dir_path'
 >Database Key is: clang____/Developer____
 >Looking up with '/Developer/usr/bin/xcodebuild -sdk '' -find 'clang''
 >Lookup resolved with 'xcodebuild -find' : '/usr/local/bin/clang'
 >cached in '/var/folders/Qe/QeIh0fytEYaAKflcqHsxaU+++TI/-Tmp-/xcrun_db'
 >failed -1 updating 'xcrun'
 >/usr/local/bin/clang
 respectively.

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Ticket URL: <https://trac.macports.org/ticket/39699#comment:10>
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