Resolve clippy warnings

examples/demo/src/tests/matmul.rs

@@ -1,3 +1,6 @@
+#![allow(clippy::many_single_char_names)]
+#![allow(clippy::too_many_arguments)]
+
 use std::time::Instant;
 
 /// Code is derived Rayon's matmul example

examples/demo/src/tests/mod.rs

@@ -155,7 +155,7 @@ pub fn hello() -> Result<(), ()> {
 	println!("你好，世界");
 	println!("สวัสดีชาวโลก");
 	println!("Chào thế giới");
-	let crab = vec![0xF0 as u8, 0x9F as u8, 0xA6 as u8, 0x80 as u8];
+	let crab = vec![0xF0_u8, 0x9F_u8, 0xA6_u8, 0x80_u8];
 	println!(
 		"Crab emoji: {}",
 		String::from_utf8(crab).unwrap_or_default()

examples/httpd/src/main.rs

@@ -6,7 +6,7 @@ extern crate hermit_sys;
 extern crate tiny_http;
 
 fn main() {
-	let crab = vec![0xF0 as u8, 0x9F as u8, 0xA6 as u8, 0x80 as u8];
+	let crab = vec![0xF0_u8, 0x9F_u8, 0xA6_u8, 0x80_u8];
 	let text = format!(
 		"Hello from RustyHermit {}",
 		String::from_utf8(crab).unwrap_or_default()

hermit-abi/src/lib.rs

@@ -2,6 +2,9 @@
 //! [RustyHermit](https://github.com/hermitcore/libhermit-rs).
 
 #![no_std]
+#![allow(clippy::missing_safety_doc)]
+#![allow(clippy::result_unit_err)]
+
 extern crate libc;
 
 pub mod tcplistener;

hermit-sys/build.rs

@@ -89,8 +89,7 @@ fn build_hermit(src_dir: &Path, target_dir_opt: Option<&Path>) {
 		cmd.arg("vga");
 	}
 
-	let mut rustflags = Vec::new();
-	rustflags.push("-Zmutable-noalias=no".to_string());
+	let mut rustflags = vec!["-Zmutable-noalias=no".to_string()];
 
 	#[cfg(feature = "instrument")]
 	{
@@ -226,7 +225,7 @@ fn build() {
 #[cfg(all(not(feature = "rustc-dep-of-std"), feature = "with_submodule"))]
 fn build() {
 	let out_dir = PathBuf::from(env::var("OUT_DIR").unwrap());
-	let target_dir = out_dir.clone().join("target");
+	let target_dir = out_dir.join("target");
 	let src_dir = env::current_dir()
 		.unwrap()
 		.parent()