[MacPorts] #62261: Warning: The macOS 11.2 SDK does not appear to be installed. Ports may not build correctly.

[MacPorts]

#62261: Warning: The macOS 11.2 SDK does not appear to be installed. Ports may not
build correctly.
---------------------+---------------------
  Reporter:  erlisR  |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.6.4
Resolution:          |   Keywords:  big sur
      Port:          |
---------------------+---------------------

Comment (by erlisR):

 Thank you Ken, I appreciate your "induction" :-). Indeed, clang-11
 installs smoothly. The problem is that R doesn't seem to work yet with
 versions of clang >8.0. I tried using clang-11 to compile RcppArmadillo
 form source and I got this.


 {{{
 user at user-MacBook-Air % R CMD INSTALL RcppArmadillo_0.10.2.1.0.tar.gz
 * installing to library
 ‘/Library/Frameworks/R.framework/Versions/4.0/Resources/library’
 * installing *source* package ‘RcppArmadillo’ ...
 ** package ‘RcppArmadillo’ successfully unpacked and MD5 sums checked
 ** using staged installation
 checking whether the C++ compiler works... no
 configure: error: in
 `/private/var/folders/jv/tw8gd0wj4pxf729n5gmgc_pr0000gn/T/RtmpMcON9I/R.INSTALL419be64b4f8/RcppArmadillo':
 }}}

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Ticket URL: <https://trac.macports.org/ticket/62261#comment:2>
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