Add cfgs to fix compilation in more situations.

Author: sunfishcode

src/backend/linux_raw/conv.rs

@@ -15,7 +15,7 @@
 
 use super::c;
 use super::fd::{AsRawFd, BorrowedFd, FromRawFd, RawFd};
-#[cfg(feature = "runtime")]
+#[cfg(any(feature = "event", feature = "runtime"))]
 use super::io::errno::try_decode_error;
 #[cfg(target_pointer_width = "64")]
 use super::io::errno::try_decode_u64;
@@ -874,7 +874,7 @@ pub(super) unsafe fn ret(raw: RetReg<R0>) -> io::Result<()> {
 ///
 /// The caller must ensure that this is the return value of a syscall which
 /// doesn't return on success.
-#[cfg(feature = "runtime")]
+#[cfg(any(feature = "event", feature = "runtime"))]
 #[inline]
 pub(super) unsafe fn ret_error(raw: RetReg<R0>) -> io::Errno {
     try_decode_error(raw)

src/backend/linux_raw/io/errno.rs

@@ -236,7 +236,7 @@ pub(in crate::backend) unsafe fn try_decode_void<Num: RetNumber>(
 /// # Safety
 ///
 /// This must only be used with syscalls which do not return on success.
-#[cfg(feature = "runtime")]
+#[cfg(any(feature = "event", feature = "runtime"))]
 #[inline]
 pub(in crate::backend) unsafe fn try_decode_error<Num: RetNumber>(raw: RetReg<Num>) -> io::Errno {
     debug_assert!(raw.is_in_range(-4095..0));

tests/net/cmsg.rs

@@ -1,3 +1,4 @@
+#[cfg(feature = "pipe")]
 #[test]
 fn test_empty_buffers() {
     use rustix::fd::AsFd;