[MacPorts] #61474: gmp @6.2.0_1: clang: error: invalid version number in 'MACOSX_DEPLOYMENT_TARGET=11.0'

[MacPorts]

#61474: gmp @6.2.0_1: clang: error: invalid version number in
'MACOSX_DEPLOYMENT_TARGET=11.0'
-----------------------+--------------------
  Reporter:  pavibhai  |      Owner:  (none)
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.6.4
Resolution:            |   Keywords:  bigsur
      Port:            |
-----------------------+--------------------

Comment (by pavibhai):

 Replying to [comment:8 kencu]:
 > it hasn't changed...your CLTs are out of date.
 >
 > Try opening Xcode.
 >
 > If that doesn't work, and the update doesn't show up in software update,
 you'll have to get them from Apple's Dev website.

 I see. I don't get an update notification for the command line tools. Let
 me try the dev site.

-- 
Ticket URL: <https://trac.macports.org/ticket/61474#comment:9>
MacPorts <https://www.macports.org/>
Ports system for macOS