fix: support lib tests on Apple Silicon

.github/workflows/ci.yml

@@ -98,7 +98,7 @@ jobs:
       - uses: mkroening/rust-toolchain-toml@main
       - uses: Swatinem/rust-cache@v2
       - name: Unit tests
-        run: cargo test --lib --target x86_64-unknown-linux-gnu
+        run: cargo test --lib
         env:
           RUSTFLAGS: -Awarnings
       - name: Download loader

src/arch/aarch64/kernel/mod.rs

@@ -34,6 +34,7 @@ pub(crate) static CPU_ONLINE: AtomicU32 = AtomicU32::new(0);
 
 pub(crate) static CURRENT_STACK_ADDRESS: AtomicU64 = AtomicU64::new(0);
 
+#[cfg(target_os = "none")]
 global_asm!(include_str!("start.s"));
 
 /// Kernel header to announce machine features

src/arch/x86_64/kernel/mod.rs

@@ -188,7 +188,6 @@ pub fn message_output_init() {
 	*COM1.lock() = Some(serial_port);
 }
 
-#[cfg(target_os = "none")]
 pub fn output_message_buf(buf: &[u8]) {
 	// Output messages to the serial port and VGA screen in unikernel mode.
 	COM1.lock().as_mut().unwrap().send(buf);
@@ -201,13 +200,6 @@ pub fn output_message_buf(buf: &[u8]) {
 	}
 }
 
-#[cfg(not(target_os = "none"))]
-pub fn output_message_buf(buf: &[u8]) {
-	use std::io::Write;
-
-	std::io::stderr().write_all(buf).unwrap();
-}
-
 /// Real Boot Processor initialization as soon as we have put the first Welcome message on the screen.
 #[cfg(target_os = "none")]
 pub fn boot_processor_init() {
@@ -333,13 +325,3 @@ unsafe extern "C" fn pre_init(boot_info: &'static RawBootInfo, cpu_id: u32) -> !
 		crate::application_processor_main();
 	}
 }
-
-#[cfg(all(test, not(target_os = "none")))]
-mod tests {
-	use super::*;
-
-	#[test]
-	fn test_output() {
-		output_message_buf(b"test message\n");
-	}
-}

src/lib.rs

@@ -80,6 +80,7 @@ mod scheduler;
 mod synch;
 mod syscalls;
 
+#[cfg(target_os = "none")]
 hermit_entry::define_entry_version!();
 
 #[doc(hidden)]

src/macros.rs

@@ -3,6 +3,7 @@
 /// Adapted from [`std::print`].
 ///
 /// [`std::print`]: https://doc.rust-lang.org/stable/std/macro.print.html
+#[cfg(target_os = "none")]
 #[macro_export]
 macro_rules! print {
     ($($arg:tt)*) => {{
@@ -15,6 +16,7 @@ macro_rules! print {
 /// Adapted from [`std::println`].
 ///
 /// [`std::println`]: https://doc.rust-lang.org/stable/std/macro.println.html
+#[cfg(target_os = "none")]
 #[macro_export]
 macro_rules! println {
     () => {
@@ -28,6 +30,7 @@ macro_rules! println {
 /// Prints and returns the value of a given expression for quick and dirty
 /// debugging.
 // Copied from std/macros.rs
+#[cfg(target_os = "none")]
 #[macro_export]
 macro_rules! dbg {
     // NOTE: We cannot use `concat!` to make a static string as a format argument