[MacPorts] #62770: clang++ 11 broken by MacOS 11.3 update

[MacPorts]

#62770: clang++ 11 broken by MacOS 11.3 update
-----------------------+---------------------------
  Reporter:  haberg-1  |      Owner:  jeremyhu
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.6.4
Resolution:            |   Keywords:  bigsur x86_64
      Port:  clang-11  |
-----------------------+---------------------------

Comment (by cjones051073):

 I don't know, but diffing

 {{{
 kdiff3 /opt/local/libexec/llvm-11/include/c++/v1/__config
 /opt/local/libexec/llvm-devel/include/c++/v1/__config
 }}}

 there's a lot going on, particularly related to various LIBCPP defines.

-- 
Ticket URL: <https://trac.macports.org/ticket/62770#comment:10>
MacPorts <https://www.macports.org/>
Ports system for macOS