[MacPorts] #65382: py310-pytomlpp @1.0.11: error: invalid value 'c++17' in '-std=c++17'

[MacPorts]

#65382: py310-pytomlpp @1.0.11: error: invalid value 'c++17' in '-std=c++17'
------------------------+-------------------------
 Reporter:  ryandesign  |      Owner:  Schamschula
     Type:  defect      |     Status:  assigned
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.7.2
 Keywords:              |       Port:  py-pytomlpp
------------------------+-------------------------
 https://build.macports.org/builders/ports-10.10_x86_64-builder/builds/184918/steps
 /install-port/logs/stdio
 {{{
 /opt/local/var/macports/build
 /_opt_bblocal_var_buildworker_ports_build_ports_python_py-
 pytomlpp/py310-pytomlpp/work/compwrap/cc/usr/bin/clang -Wno-unused-result
 -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv
 -O3 -Wall -pipe -Os -arch x86_64 -isysroot/
 -I/opt/local/var/macports/build
 /_opt_bblocal_var_buildworker_ports_build_ports_python_py-
 pytomlpp/py310-pytomlpp/work/pytomlpp-1.0.11/include
 -I/opt/local/var/macports/build
 /_opt_bblocal_var_buildworker_ports_build_ports_python_py-
 pytomlpp/py310-pytomlpp/work/pytomlpp-1.0.11/third_party
 -I/opt/local/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10
 /site-packages/pybind11/include
 -I/opt/local/Library/Frameworks/Python.framework/Versions/3.10/include/python3.10
 -c src/encoding_decoding.cpp -o
 build/temp.macosx-10.10-x86_64-cpython-310/src/encoding_decoding.o
 -std=c++17
 error: invalid value 'c++17' in '-std=c++17'
 }}}
 So on the one hand the portfile probably needs `compiler.cxx_standard
 2017` to make MacPorts select a C++17-capable compiler, but on the other
 hand it's weird to be sending `-std=c++17` to a C compiler.

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Ticket URL: <https://trac.macports.org/ticket/65382>
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