[MacPorts] #70750: MacOS Sequoia: C++ headers are not found with CLTs installed

[MacPorts]

#70750: MacOS Sequoia: C++ headers are not found with CLTs installed
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  Reporter:  SaintBol  |      Owner:  (none)
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:  sequoia
      Port:            |
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Comment (by wdormann):

 Replying to [comment:34 kencu]:
 > Then I blew out the CLTs with {{{ sudo rm -rf
 /Library/Developer/CommandLineTools}}} and installed the current CLTs
 (Xcode 16, not Xcode 16.1 beta) and then everything works fine.


 OK, so this is interesting.  I attempted this (removing the directory) and
 then installing CLT via {{{xcode-select --install}}} on my system that has
 Xcode 16 installed.  The result of this?

 {{{
 Error: The installed version of the Command Line Tools for Xcode
 (15.3.0.0.1.1708646388) is too old to use on the installed OS version.
 Please install version 16 or later on macOS 15.
 Error: Follow https://guide.macports.org/#project.tickets if you believe
 there is a bug.
 Error: Processing of port pcre failed
 }}}

 So oddly the {{{xcode-select}}} tool (from Xcode 16? {{{xcode-select
 version 2409}}}), installs CLT 15.3.0.0.1.1708646388?  In the past I
 recall using {{{xcode-select}}} (I think?  It's a bit of a blur to me by
 now) to upgrade from the Terminal CLT 15.3.0.0.1.1708646388 to CLT 16, and
 that worked well enough to get MacPorts working, though in a semi-broken
 way as outlined in this bug.

 I don't have the environment available to me at the moment, but I wonder
 if somehow my broken state was encountered because the system somehow had
 both CLT 16 installed, but also remnants of the prior CLT
 15.3.0.0.1.1708646388?

 Anyway,
 I was able to get MacPorts fully working by:

 1. {{{sudo rm -rf /Library/Developer/CommandLineTools}}}
 1. Install CLT 16 from the DMG available from
 https://developer.apple.com/download/all/
 ({{{Command_Line_Tools_for_Xcode_16.dmg}}})

 After this, everything is working fine.

-- 
Ticket URL: <https://trac.macports.org/ticket/70750#comment:37>
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