Make two functions private

compiler/rustc_interface/src/util.rs

@@ -118,7 +118,7 @@ fn get_stack_size() -> Option<usize> {
 /// Like a `thread::Builder::spawn` followed by a `join()`, but avoids the need
 /// for `'static` bounds.
 #[cfg(not(parallel_compiler))]
-pub fn scoped_thread<F: FnOnce() -> R + Send, R: Send>(cfg: thread::Builder, f: F) -> R {
+fn scoped_thread<F: FnOnce() -> R + Send, R: Send>(cfg: thread::Builder, f: F) -> R {
     // SAFETY: join() is called immediately, so any closure captures are still
     // alive.
     match unsafe { cfg.spawn_unchecked(f) }.unwrap().join() {
@@ -379,7 +379,7 @@ fn sysroot_candidates() -> Vec<PathBuf> {
     }
 }
 
-pub fn get_codegen_sysroot(maybe_sysroot: &Option<PathBuf>, backend_name: &str) -> MakeBackendFn {
+fn get_codegen_sysroot(maybe_sysroot: &Option<PathBuf>, backend_name: &str) -> MakeBackendFn {
     // For now we only allow this function to be called once as it'll dlopen a
     // few things, which seems to work best if we only do that once. In
     // general this assertion never trips due to the once guard in `get_codegen_backend`,