[MacPorts] #63101: clang-12 @12.0.0: error: non-constant-expression cannot be narrowed from type 'long long' to 'std::size_t' (aka 'unsigned long') in initializer list [-Wc++11-narrowing]

[MacPorts]

#63101: clang-12 @12.0.0: error: non-constant-expression cannot be narrowed from
type 'long long' to 'std::size_t' (aka 'unsigned long') in initializer list
[-Wc++11-narrowing]
------------------------+----------------------
 Reporter:  ryandesign  |      Owner:  kencu
     Type:  defect      |     Status:  assigned
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.7.99
 Keywords:  highsierra  |       Port:  clang-12
------------------------+----------------------
 I can't build clang-12 on High Sierra (with the universal variant in case
 that's relevant):
 {{{
 .../llvm-project-12.0.0.src/flang/lib/Evaluate/constant.cpp:254:30: error:
 non-constant-expression cannot be narrowed from type 'long long' to
 'std::size_t' (aka 'unsigned long') in initializer list
 [-Wc++11-narrowing]
     std::size_t elementBytes{length_ * sizeof(decltype(values_[0]))};
                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 }}}

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Ticket URL: <https://trac.macports.org/ticket/63101>
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