[compiler-rt] [libcxx] [clang] [llvm] [libc] [flang] [lldb] [clang-tools-extra] [flang] FDATE extension implementation: get date and time in ctime format (PR #71222)

[Yi Wu via cfe-commits]

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@@ -22,6 +22,9 @@ extern "C" {
 // CALL FLUSH(n) antedates the Fortran 2003 FLUSH statement.
 void FORTRAN_PROCEDURE_NAME(flush)(const int &unit);
 
+// GNU extension subroutine FDATE
+void FORTRAN_PROCEDURE_NAME(fdate)(std::byte *string, std::int64_t length);
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yi-wu-arm wrote:

its my problem, I design the test wrong, it can be `char`, I will change it in the next commit

https://github.com/llvm/llvm-project/pull/71222