armv7 targeting (on aarch64, via poudriere-devel): system's clang 13 rejected building devel/lllvm13

There error was:

error: non-constant-expression cannot be narrowed from type 'long long' to 'std::size_t' (aka 'unsi
gned int') in initializer list [-Wc++11-narrowing]
  std::size_t resultBytes{size * elementBytes};
                          ^~~~~~~~~~~~~~~~~~~
/wrkdirs/usr/ports/devel/llvm13/work/llvm-project-13.0.0.src/flang/runtime/misc-intrinsic.cpp:50:27: note: insert an explicit cast to silence this issue
  std::size_t resultBytes{size * elementBytes};
                          ^~~~~~~~~~~~~~~~~~~
                          static_cast<size_t>( )

More context:

===> Compilation failed unexpectedly.
Try to set MAKE_JOBS_UNSAFE=yes and rebuild before reporting the failure to
the maintainer.
/usr/bin/c++ -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/wrkdirs/usr/ports/devel/llvm13/work/.build/tools/flang/runtime -I/wrkdi
rs/usr/ports/devel/llvm13/work/llvm-project-13.0.0.src/flang/runtime -I/wrkdirs/usr/ports/devel/llvm13/work/llvm-project-13.0.0.src/flang/include -I/wrkdirs/usr/ports/devel/llvm13/work/.build/tools/fl
ang/include -I/wrkdirs/usr/ports/devel/llvm13/work/.build/include -I/wrkdirs/usr/ports/devel/llvm13/work/llvm-project-13.0.0.src/llvm/include -isystem /wrkdirs/usr/ports/devel/llvm13/work/llvm-project
-13.0.0.src/llvm/../mlir/include -isystem /wrkdirs/usr/ports/devel/llvm13/work/.build/tools/mlir/include -isystem /wrkdirs/usr/ports/devel/llvm13/work/.build/tools/clang/include -isystem /wrkdirs/usr/
ports/devel/llvm13/work/llvm-project-13.0.0.src/llvm/../clang/include -O2 -pipe -mcpu=cortex-a7 -DNDEBUG -fstack-protector-strong -isystem /usr/local/include -fno-strict-aliasing -mcpu=cortex-a7  -DND
EBUG -isystem /usr/local/include -fPIC -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-
initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstr
ing-conversion -Wmisleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -Wno-deprecated-copy -Wno-string-conversion -Wno-unused-command-line-argument -Wstring-conversion       
    -Wcovered-switch-default -Wno-nested-anon-types -O2 -pipe -mcpu=cortex-a7 -DNDEBUG -fstack-protector-strong -isystem /usr/local/include -fno-strict-aliasing -mcpu=cortex-a7  -DNDEBUG -isystem /usr
/local/include -std=c++17  -fno-exceptions -MD -MT tools/flang/runtime/CMakeFiles/obj.FortranRuntime.dir/misc-intrinsic.cpp.o -MF tools/flang/runtime/CMakeFiles/obj.FortranRuntime.dir/misc-intrinsic.c
pp.o.d -o tools/flang/runtime/CMakeFiles/obj.FortranRuntime.dir/misc-intrinsic.cpp.o -c /wrkdirs/usr/ports/devel/llvm13/work/llvm-project-13.0.0.src/flang/runtime/misc-intrinsic.cpp
/wrkdirs/usr/ports/devel/llvm13/work/llvm-project-13.0.0.src/flang/runtime/misc-intrinsic.cpp:50:27: error: non-constant-expression cannot be narrowed from type 'long long' to 'std::size_t' (aka 'unsi
gned int') in initializer list [-Wc++11-narrowing]
  std::size_t resultBytes{size * elementBytes};
                          ^~~~~~~~~~~~~~~~~~~
/wrkdirs/usr/ports/devel/llvm13/work/llvm-project-13.0.0.src/flang/runtime/misc-intrinsic.cpp:50:27: note: insert an explicit cast to silence this issue
  std::size_t resultBytes{size * elementBytes};
                          ^~~~~~~~~~~~~~~~~~~
                          static_cast<size_t>( )
1 error generated.

===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)