[MacPorts] #63806: sbcl @2.1.10 +fancy: Cannot build on macOS 12.0.1 with Xcode 13.1

[MacPorts]

#63806: sbcl @2.1.10 +fancy: Cannot build on macOS 12.0.1 with Xcode 13.1
------------------------------+----------------------
  Reporter:  foretspaisibles  |      Owner:  easye
      Type:  defect           |     Status:  assigned
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:
Resolution:                   |   Keywords:  monterey
      Port:  sbcl             |
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Comment (by foretspaisibles):

 I have been able to build and use SBCL by bootstrapping using CCL instead
 of SBCL. It can be done using the following variant definition:

 {{{
 variant ccl description {Uses CCL to boostrap SBCL.} {
     depends_build-append bin:ccl64:ccl
     set host_lisp "${prefix}/bin/ccl64"
 }
 }}}

 However I am not sure how to cleanup or reorganise the Portfile so that we
 do not download the binary of SBCL if we are not going to use it.

-- 
Ticket URL: <https://trac.macports.org/ticket/63806#comment:6>
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