[MacPorts] #63115: R 4.1.0 does not configure on Big Sur M1

[MacPorts]

#63115: R 4.1.0 does not configure on Big Sur M1
---------------------------+--------------------
 Reporter:  diekhans       |      Owner:  (none)
     Type:  defect         |     Status:  new
 Priority:  Normal         |  Milestone:
Component:  ports          |    Version:  2.7.1
 Keywords:  arm64, bigsur  |       Port:  R
---------------------------+--------------------
 configure of R 4.1.0 fails with error:


 {{{
 :info:configure checking whether mixed C/Fortran code can be run...
 configure: WARNING: cannot run mixed C/Fortran code

 }}}

 config.log and main.log attached

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Ticket URL: <https://trac.macports.org/ticket/63115>
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