[MacPorts] #71551: nodejs22 @22.12.0_0: error: invalid value 'gnu++20' in '-std=gnu++20' (was: nodejs22 @22.12.0_0 : Failed to build nodejs22: command execution failed)

[MacPorts]

#71551: nodejs22 @22.12.0_0: error: invalid value 'gnu++20' in '-std=gnu++20'
-----------------------+----------------------
  Reporter:  axoide    |      Owner:  ci42
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.10.5
Resolution:            |   Keywords:  mojave
      Port:  nodejs22  |
-----------------------+----------------------
Changes (by ryandesign):

 * keywords:   => mojave


Comment:

 The error in the log is:

 {{{
 :info:build error: invalid value 'gnu++20' in '-std=gnu++20'
 :info:build note: use 'c++98' or 'c++03' for 'ISO C++ 1998 with
 amendments' standard
 :info:build note: use 'gnu++98' or 'gnu++03' for 'ISO C++ 1998 with
 amendments and GNU extensions' standard
 :info:build note: use 'c++11' for 'ISO C++ 2011 with amendments' standard
 :info:build note: use 'gnu++11' for 'ISO C++ 2011 with amendments and GNU
 extensions' standard
 :info:build note: use 'c++14' for 'ISO C++ 2014 with amendments' standard
 :info:build note: use 'gnu++14' for 'ISO C++ 2014 with amendments and GNU
 extensions' standard
 :info:build note: use 'c++17' for 'ISO C++ 2017 with amendments' standard
 :info:build note: use 'gnu++17' for 'ISO C++ 2017 with amendments and GNU
 extensions' standard
 :info:build note: use 'c++2a' for 'Working draft for ISO C++ 2020'
 standard
 :info:build note: use 'gnu++2a' for 'Working draft for ISO C++ 2020 with
 GNU extensions' standard
 }}}

 This is surprising. MacPorts has chosen MacPorts clang 17 and according to
 CompilerSelection MacPorts clang 16 and later (and Apple clang 15 and
 later) support C++20.

 The port says `compiler.cxx_standard 2017`. If it now requires C++20 that
 line should change to `2020` but that won't fix this problem.

 The log shows that it is using MacPorts clang 17 as the C compiler but
 Xcode clang as the C++ compiler. Fixing that should fix the problem.

-- 
Ticket URL: <https://trac.macports.org/ticket/71551#comment:2>
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