Add stdio configuring to run-make Rustc

Author: clubby789

src/tools/run-make-support/src/macros.rs

@@ -70,6 +70,30 @@ macro_rules! impl_common_helpers {
 self
 }
 
+/// Configuration for the child process’s standard input (stdin) handle.
+///
+/// See [`std::process::Command::stdin`].
+pubfn stdin<T:Into<Stdio>>(&mutself, cfg:T) -> &mutSelf{
+self.cmd.stdin(cfg);
+self
+}
+
+/// Configuration for the child process’s standard output (stdout) handle.
+///
+/// See [`std::process::Command::stdout`].
+pubfn stdout<T:Into<Stdio>>(&mutself, cfg:T) -> &mutSelf{
+self.cmd.stdout(cfg);
+self
+}
+
+/// Configuration for the child process’s standard error (stderr) handle.
+///
+/// See [`std::process::Command::stderr`].
+pubfn stderr<T:Into<Stdio>>(&mutself, cfg:T) -> &mutSelf{
+self.cmd.stderr(cfg);
+self
+}
+
 /// Inspect what the underlying [`Command`] is up to the
 /// current construction.
 pubfn inspect<I>(&mutself, inspector:I) -> &mutSelf