[flang-commits] [flang] [llvm] [flang-rt] Add implementation for date_and_time on Windows (PR #190174)

[Michael Kruse via flang-commits]

https://github.com/Meinersbur approved this pull request.

Found the same discussion/code for 
MS STL: https://github.com/microsoft/STL/issues/624
libc++: https://github.com/llvm/llvm-project/commit/6e3a0cc404a74b7b9d7dd4228606d72f45114739
MinGW: https://github.com/mingw-w64/mingw-w64/commit/59195b2d7fe26549f70969b0dd487293819f023e

All three use `GetSystemTimePreciseAsFileTime` for `std::chrono::system_clock`, even though with C++ `std::chrono::high_resolution_clock` is also available.

https://github.com/llvm/llvm-project/pull/190174