[MacPorts] #62991: m4 @ 1.4.19+universal Failed to configure

[MacPorts]

#62991: m4 @ 1.4.19+universal Failed to configure
---------------------------+--------------------------
  Reporter:  FaradayLight  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.1
Resolution:                |   Keywords:  arm64 bigsur
      Port:  M4            |
---------------------------+--------------------------

Comment (by FaradayLight):

 From the config.log:


 {{{
 configure:6336: checking whether the compiler is clang
 configure:6358: /usr/bin/clang -c -pipe -Os
 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk -arch arm64
 -arch x86_64 -I/opt/local/include
 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX11.sdk conftest.c
 >&5
 conftest.c:13:12: error: unknown type name 'barfbarf'
 }}}

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Ticket URL: <https://trac.macports.org/ticket/62991#comment:1>
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