[MacPorts] #57633: I tried to upgrade macports. but this error showed up

[MacPorts]

#57633: I tried to upgrade macports. but this error showed up
----------------------+--------------------
  Reporter:  vvn29    |      Owner:  (none)
      Type:  defect   |     Status:  closed
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.5.4
Resolution:  invalid  |   Keywords:
      Port:           |
----------------------+--------------------

Comment (by jmroot):

 Either /usr/include (provided by the Command Line Tools) is missing, or
 macosx_sdk_version is not set to the current OS version.

 https://github.com/macports/macports-
 base/blob/v2.5.4/src/port1.0/portconfigure.tcl#L414

-- 
Ticket URL: <https://trac.macports.org/ticket/57633#comment:5>
MacPorts <https://www.macports.org/>
Ports system for macOS