[MacPorts] #70925: cmake-bootstrap configure fails

[MacPorts]

#70925: cmake-bootstrap configure fails
---------------------------+-----------------------------
 Reporter:  murrayE        |      Owner:  (none)
     Type:  defect         |     Status:  new
 Priority:  Normal         |  Milestone:
Component:  ports          |    Version:  2.10.1
 Keywords:  sequoia arm64  |       Port:  cmake-bootstrap
---------------------------+-----------------------------
 Configure of cmake-bootstrap @3.9.6 failed during `sudo port migrate` from
 Sonoma to Sequoia 15.0.
 From `main.log`:

 {{{
 :info:configure CMake 3.9.6, Copyright 2000-2017 Kitware, Inc. and
 Contributors
 :info:configure C compiler on this system is: /usr/bin/clang -pipe -Os
 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk -arch arm64
 -std=gnu11
 :info:configure ---------------------------------------------
 :info:configure Error when bootstrapping CMake:
 :info:configure Cannot find appropriate C++ compiler on this system.
 :info:configure Please specify one using environment variable CXX.
 }}}

 As a result, a bunch of ports depending on `cmake-bootstrap` also failed
 to be restored: `OpenBLAS`, `R-rsvg`, `emacs`, `ffmpeg`, `freeglut`,
 `graphviz`, `graphviz-gui`, `gtk3`, `latex2html`, `libavif`, `libheif`,
 `....

-- 
Ticket URL: <https://trac.macports.org/ticket/70925>
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