[flang-commits] [flang] [flang] Add EXECUTE_COMMAND_LINE runtime and lowering intrinsics implementation (PR #74077)

[Peter Klausler via flang-commits]

klausler wrote:

That makes sense, given that you want to use `system()` rather than `fork()` and `execvp()`.  On the asynchronous POSIX path you're actually creating two processes rather than one, unfortunately.

Do you ever use `waitpid()` to harvest these completed processes?  If not, they'll occupy system resources until the program exits.

https://github.com/llvm/llvm-project/pull/74077