[MacPorts] #61525: py38-scikit-learn fails to build on macOS 11 Big Sur

[MacPorts]

#61525: py38-scikit-learn fails to build on macOS 11 Big Sur
------------------------------+----------------------
  Reporter:  smeingast        |      Owner:  stromnov
      Type:  defect           |     Status:  assigned
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.6.4
Resolution:                   |   Keywords:
      Port:  py-scikit-learn  |
------------------------------+----------------------

Comment (by cjones051073):

 patch for clang-9.0 seems to have worked fine. Without patch

 {{{
 Oberon ~/cernbox/MacPorts/c++17 > MACOSX_DEPLOYMENT_TARGET=11.0
 clang++-mp-9.0 -std=c++17 test.cpp
 clang: error: invalid version number in 'MACOSX_DEPLOYMENT_TARGET=11.0'
 }}}

 with

 {{{
 Oberon ~/cernbox/MacPorts/c++17 > MACOSX_DEPLOYMENT_TARGET=11.0
 clang++-mp-9.0 -std=c++17 test.cpp
 Oberon ~/cernbox/MacPorts/c++17 >
 }}}

 will test similar one for clang 10, and then look to preparing a PR.

-- 
Ticket URL: <https://trac.macports.org/ticket/61525#comment:6>
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