[MacPorts] #69812: cmake-bootstrap @3.9.6 does not compile under rosetta2

[MacPorts]

#69812: cmake-bootstrap @3.9.6 does not compile under rosetta2
------------------------------+--------------------
  Reporter:  lukaso           |      Owner:  (none)
      Type:  defect           |     Status:  new
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:
Resolution:                   |   Keywords:
      Port:  cmake-bootstrap  |
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Comment (by kencu):

 there should be a way to make this work, with some shenanigans likely.

 the problem is not the C compiler line you quoted, but the CXX compiler is
 not finding the sysroot.

 see if you can open an x86_64 terminal as you do, and then compile a few
 simple test cxx files and see what happens

 {{{
 /usr/bin/clang++ -pipe -Os
 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX10.13.sdk -arch
 x86_64
 }}}

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Ticket URL: <https://trac.macports.org/ticket/69812#comment:6>
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