[MacPorts] #67860: nrsc5: Invalid configuration `arm64-apple-darwin20.6.0': machine `arm64-apple' not recognized

[MacPorts]

#67860: nrsc5: Invalid configuration `arm64-apple-darwin20.6.0': machine
`arm64-apple' not recognized
------------------------+-------------------------
 Reporter:  ryandesign  |      Owner:  trodemaster
     Type:  defect      |     Status:  assigned
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.8.1
 Keywords:  arm64       |       Port:  nrsc5
------------------------+-------------------------
 nrsc5 fails to build on Apple Silicon Macs:

 https://build.macports.org/builders/ports-
 11_arm64-builder/builds/98635/steps/install-port/logs/stdio

 {{{
 checking build system type... arm-apple-darwin20.6.0
 checking host system type... Invalid configuration `arm64-apple-
 darwin20.6.0': machine `arm64-apple' not recognized
 configure: error: /bin/sh
 /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_audio_nrsc5/nrsc5/work/build
 /fftw-prefix/src/fftw_external/config.sub arm64-apple-darwin20.6.0 failed
 }}}

 Needs updated config.guess and config.sub files to support Apple Silicon.
 See [05f186ed589e9caab0c4063720b4c97b0814317a/macports-ports] for an
 example of the block you would need to add to the Portfile, except that in
 the case of nrsc5 the problem is that it is downloading and extracting and
 building fftw 3.3.8 when the problem happens. Ideally, fix the build so it
 does not download anything. Instead, for example, have nrsc5 make use of
 the existing fftw-3 port.

-- 
Ticket URL: <https://trac.macports.org/ticket/67860>
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