[MacPorts] #62023: python39 @3.9.1 does not build universal on BigSur

[MacPorts]

#62023: python39 @3.9.1 does not build universal on BigSur
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  Reporter:  kencu     |      Owner:  jmroot
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:  BigSur universal
      Port:  python39  |
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Comment (by kencu):

 There is perhaps another approach to be explored, here:
 {{{
 It is possible to build a number of flavours of the universal binary
 build,
 the default is a 32-bit only binary (i386 and ppc). The flavour can be
 specified using the option ``--with-universal-archs=VALUE``. The following
 values are available:

   * ``32-bit``:   ``ppc``, ``i386``

   * ``64-bit``:   ``ppc64``, ``x86_64``

   * ``all``:      ``ppc``, ``ppc64``, ``i386``, ``x86_64``

   * ``3-way``:    ``ppc``, ``i386`` and ``x86_64``

   * ``intel``:    ``i386``, ``x86_64``

 To build a universal binary that includes a 64-bit architecture, you must
 build
 on a system running OSX 10.5 or later. The ``all`` flavour can only be
 built on
 OSX 10.5.

 The makefile for a framework build will install ``python32`` and
 ``pythonw32``
 binaries when the universal architecures includes at least one 32-bit
 architecture
 (that is, for all flavours but ``64-bit``).

 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/62023#comment:7>
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