diff --git a/src/header/arpa_inet/mod.rs b/src/header/arpa_inet/mod.rs
index 838f71f2ff..e982353f71 100644
--- a/src/header/arpa_inet/mod.rs
+++ b/src/header/arpa_inet/mod.rs
@@ -145,7 +145,10 @@ pub extern "C" fn inet_netof(r#in: in_addr) -> in_addr_t {
 #[deprecated]
 #[unsafe(no_mangle)]
 pub unsafe extern "C" fn inet_network(cp: *const c_char) -> in_addr_t {
-    ntohl(unsafe { inet_addr(cp) })
+    ntohl(unsafe {
+        #[allow(deprecated)]
+        inet_addr(cp)
+    })
 }
 
 /// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/inet_addr.html>.
diff --git a/src/header/netdb/mod.rs b/src/header/netdb/mod.rs
index 72ca178836..424270b907 100644
--- a/src/header/netdb/mod.rs
+++ b/src/header/netdb/mod.rs
@@ -348,7 +348,10 @@ pub unsafe extern "C" fn gethostbyname(name: *const c_char) -> *mut hostent {
     // Some implementations just skip resolution and copy the address to h_name
     if let Some(s_addr) = parse_ipv4_string(name_str) {
         let addr = in_addr { s_addr };
-        return unsafe { gethostbyaddr(ptr::from_ref(&addr).cast::<c_void>(), 4, AF_INET) };
+        return unsafe {
+            #[allow(deprecated)]
+            gethostbyaddr(ptr::from_ref(&addr).cast::<c_void>(), 4, AF_INET)
+        };
     }
 
     // check the hosts file first
@@ -1137,6 +1140,7 @@ pub extern "C" fn herror(prefix: *const c_char) {
     let code = H_ERRNO.get();
     // Safety: `hstrerror` handles every error code case and always returns a valid C string
     let error = unsafe {
+        #[allow(deprecated)]
         let msg_cstr = CStr::from_ptr(hstrerror(code));
         str::from_utf8_unchecked(msg_cstr.to_bytes())
     };
diff --git a/src/header/stdio/mod.rs b/src/header/stdio/mod.rs
index 0ece8d2ed8..a1d43be6c4 100644
--- a/src/header/stdio/mod.rs
+++ b/src/header/stdio/mod.rs
@@ -1299,7 +1299,12 @@ pub unsafe extern "C" fn tempnam(dir: *const c_char, pfx: *const c_char) -> *mut
         };
 
         // use the same mechanism as tmpnam to get the file name
-        if unsafe { tmpnam_inner(out_buf, dirname_len + 1 + prefix_len) }.is_null() {
+        if unsafe {
+            #[allow(deprecated)]
+            tmpnam_inner(out_buf, dirname_len + 1 + prefix_len)
+        }
+        .is_null()
+        {
             // failed to find a valid file name, so we need to free the buffer
             unsafe { platform::free(out_buf.cast()) };
             out_buf = ptr::null_mut();
@@ -1346,7 +1351,10 @@ pub unsafe extern "C" fn tmpnam(s: *mut c_char) -> *mut c_char {
     };
 
     unsafe { *buf = b'/' as _ };
-    unsafe { tmpnam_inner(buf, 1) }
+    unsafe {
+        #[allow(deprecated)]
+        tmpnam_inner(buf, 1)
+    }
 }
 
 #[deprecated]
@@ -1359,7 +1367,10 @@ unsafe extern "C" fn tmpnam_inner(buf: *mut c_char, offset: usize) -> *mut c_cha
     };
 
     let err = platform::ERRNO.get();
-    unsafe { stdlib::mktemp(buf) };
+    unsafe {
+        #[allow(deprecated)]
+        stdlib::mktemp(buf)
+    };
     platform::ERRNO.set(err);
 
     if unsafe { *buf } == 0 {
diff --git a/src/header/sys_time/mod.rs b/src/header/sys_time/mod.rs
index 152f145318..43b27324a9 100644
--- a/src/header/sys_time/mod.rs
+++ b/src/header/sys_time/mod.rs
@@ -69,6 +69,7 @@ pub struct timezone {
 /// The `getitimer()` function was marked obsolescent in the Open Group Base
 /// Specifications Issue 7, and removed in Issue 8.
 #[deprecated]
+#[allow(deprecated)]
 #[unsafe(no_mangle)]
 pub unsafe extern "C" fn getitimer(which: c_int, value: *mut itimerval) -> c_int {
     Sys::getitimer(which, unsafe { &mut *value })
@@ -100,6 +101,7 @@ pub unsafe extern "C" fn gettimeofday(tp: *mut timeval, tzp: *mut timezone) -> c
 /// The `setitimer()` function was marked obsolescent in the Open Group Base
 /// Specifications Issue 7, and removed in Issue 8.
 #[deprecated]
+#[allow(deprecated)]
 #[unsafe(no_mangle)]
 pub unsafe extern "C" fn setitimer(
     which: c_int,
diff --git a/src/header/sys_timeb/mod.rs b/src/header/sys_timeb/mod.rs
index b2294238e5..8935f5b474 100644
--- a/src/header/sys_timeb/mod.rs
+++ b/src/header/sys_timeb/mod.rs
@@ -9,11 +9,10 @@
 
 use core::ptr::NonNull;
 
+#[allow(deprecated)]
+use crate::header::sys_time::gettimeofday;
 use crate::{
-    header::{
-        sys_select::timeval,
-        sys_time::{gettimeofday, timezone},
-    },
+    header::{sys_select::timeval, sys_time::timezone},
     platform::types::{c_int, c_short, c_ushort, time_t},
 };
 
@@ -34,6 +33,7 @@ pub struct timeb {
 /// The caller must ensure that `tp` is convertible to a `&mut
 /// MaybeUninit<timeb>`.
 #[deprecated]
+#[allow(deprecated)]
 #[unsafe(no_mangle)]
 pub unsafe extern "C" fn ftime(tp: *mut timeb) -> c_int {
     // SAFETY: the caller is required to ensure that the pointer is valid.
@@ -44,10 +44,15 @@ pub unsafe extern "C" fn ftime(tp: *mut timeb) -> c_int {
 
     // SAFETY: tv and tz are created above, and thus will coerce to valid
     // pointers.
-    if unsafe { gettimeofday(&raw mut tv, &raw mut tz) } < 0 {
+    if unsafe {
+        #[allow(deprecated)]
+        gettimeofday(&raw mut tv, &raw mut tz)
+    } < 0
+    {
         return -1;
     }
 
+    #[allow(deprecated)]
     tp_maybe_uninit.write(timeb {
         time: tv.tv_sec,
         millitm: (tv.tv_usec / 1000) as c_ushort,
diff --git a/src/header/time/mod.rs b/src/header/time/mod.rs
index 2a7d4ca454..5260095f25 100644
--- a/src/header/time/mod.rs
+++ b/src/header/time/mod.rs
@@ -147,7 +147,10 @@ pub struct itimerspec {
 #[deprecated]
 #[unsafe(no_mangle)]
 pub unsafe extern "C" fn asctime(timeptr: *const tm) -> *mut c_char {
-    unsafe { asctime_r(timeptr, (&raw mut ASCTIME).cast()) }
+    unsafe {
+        #[allow(deprecated)]
+        asctime_r(timeptr, (&raw mut ASCTIME).cast())
+    }
 }
 
 /// See <https://pubs.opengroup.org/onlinepubs/9699919799/functions/asctime.html>.
@@ -296,7 +299,10 @@ pub unsafe extern "C" fn clock_settime(clock_id: clockid_t, tp: *const timespec)
 #[deprecated]
 #[unsafe(no_mangle)]
 pub unsafe extern "C" fn ctime(clock: *const time_t) -> *mut c_char {
-    unsafe { asctime(localtime(clock)) }
+    unsafe {
+        #[allow(deprecated)]
+        asctime(localtime(clock))
+    }
 }
 
 /// See <https://pubs.opengroup.org/onlinepubs/9699919799/functions/ctime.html>.
@@ -310,7 +316,10 @@ pub unsafe extern "C" fn ctime_r(clock: *const time_t, buf: *mut c_char) -> *mut
     // Using MaybeUninit<tm> seems to cause a panic during the build process
     let mut tm1 = blank_tm();
     unsafe { localtime_r(clock, &raw mut tm1) };
-    unsafe { asctime_r(&raw const tm1, buf) }
+    unsafe {
+        #[allow(deprecated)]
+        asctime_r(&raw const tm1, buf)
+    }
 }
 
 /// See <https://pubs.opengroup.org/onlinepubs/9799919799/functions/difftime.html>.
diff --git a/src/header/unistd/mod.rs b/src/header/unistd/mod.rs
index 6c00d74964..21df741655 100644
--- a/src/header/unistd/mod.rs
+++ b/src/header/unistd/mod.rs
@@ -9,6 +9,8 @@ use core::{
     ptr, slice,
 };
 
+#[allow(deprecated)]
+use crate::platform::types::useconds_t;
 use crate::{
     c_str::CStr,
     error::{Errno, ResultExt},
@@ -27,12 +29,12 @@ use crate::{
         self, ERRNO, Pal, PalSignal, Sys,
         types::{
             c_char, c_int, c_long, c_short, c_uint, c_ulonglong, c_void, gid_t, off_t, pid_t,
-            size_t, ssize_t, suseconds_t, time_t, uid_t, useconds_t,
+            size_t, ssize_t, suseconds_t, time_t, uid_t,
         },
     },
 };
 
-pub use self::{brk::*, getopt::*, getpass::getpass, pathconf::*, sysconf::*};
+pub use self::{brk::*, getopt::*, pathconf::*, sysconf::*};
 pub use crate::header::pthread::fork_hooks;
 
 // Inclusion of ctermid() prototype marked as obsolescent since Issue 7, cf.
@@ -1118,6 +1120,7 @@ pub extern "C" fn ttyname_r(fildes: c_int, name: *mut c_char, namesize: size_t)
 /// The `ualarm()` function was marked obsolescent in the Open Group Base
 /// Specifications Issue 6, and removed in Issue 7.
 #[deprecated]
+#[allow(deprecated)]
 #[unsafe(no_mangle)]
 pub extern "C" fn ualarm(usecs: useconds_t, interval: useconds_t) -> useconds_t {
     // TODO setitimer is unimplemented on Redox and obsolete
@@ -1167,6 +1170,7 @@ pub unsafe extern "C" fn unlinkat(fd: c_int, path: *const c_char, flags: c_int)
 /// The `usleep()` function was marked obsolescent in the Open Group Base
 /// Specifications Issue 6, and removed in Issue 7.
 #[deprecated]
+#[allow(deprecated)]
 #[unsafe(no_mangle)]
 pub extern "C" fn usleep(useconds: useconds_t) -> c_int {
     #[cfg(not(target_arch = "x86"))]
diff --git a/src/header/utime/mod.rs b/src/header/utime/mod.rs
index 75f5238560..88e10e1062 100644
--- a/src/header/utime/mod.rs
+++ b/src/header/utime/mod.rs
@@ -26,6 +26,7 @@ pub struct utimbuf {
 
 /// See <https://pubs.opengroup.org/onlinepubs/9699919799/functions/utime.html>.
 #[deprecated]
+#[allow(deprecated)]
 #[unsafe(no_mangle)]
 pub unsafe extern "C" fn utime(filename: *const c_char, times: *const utimbuf) -> c_int {
     let filename_cstr = unsafe { CStr::from_ptr(filename) };
diff --git a/src/io/error.rs b/src/io/error.rs
index f72eb42c24..203f628a88 100644
--- a/src/io/error.rs
+++ b/src/io/error.rs
@@ -219,7 +219,6 @@ struct Custom {
 ///
 /// [`io::Error`]: struct.Error.html
 #[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
-#[allow(deprecated)]
 #[non_exhaustive]
 pub enum ErrorKind {
     /// An entity was not found, often a file.
diff --git a/src/platform/linux/signal.rs b/src/platform/linux/signal.rs
index 8c571ffd67..d2b21fe1a2 100644
--- a/src/platform/linux/signal.rs
+++ b/src/platform/linux/signal.rs
@@ -10,18 +10,21 @@ use super::{
     },
     Sys, e_raw,
 };
+#[allow(deprecated)]
+use crate::header::sys_time::itimerval;
 use crate::{
     error::{Errno, Result},
     header::{
         bits_timespec::timespec,
         signal::{SA_RESTORER, SI_QUEUE, sigaction, siginfo_t, sigset_t, sigval, stack_t},
         sys_select::timeval,
-        sys_time::{self, itimerval},
+        sys_time,
     },
     platform,
 };
 
 impl PalSignal for Sys {
+    #[allow(deprecated)]
     fn getitimer(which: c_int, out: &mut itimerval) -> Result<()> {
         unsafe {
             e_raw(syscall!(GETITIMER, which, ptr::from_mut(out)))?;
@@ -58,6 +61,7 @@ impl PalSignal for Sys {
         Ok(())
     }
 
+    #[allow(deprecated)]
     fn setitimer(which: c_int, new: &itimerval, old: Option<&mut itimerval>) -> Result<()> {
         e_raw(unsafe {
             syscall!(
diff --git a/src/platform/pal/signal.rs b/src/platform/pal/signal.rs
index 8a8aaac346..94b3a3ae58 100644
--- a/src/platform/pal/signal.rs
+++ b/src/platform/pal/signal.rs
@@ -2,18 +2,20 @@ use super::super::{
     Pal,
     types::{c_int, c_uint, pid_t},
 };
+#[allow(deprecated)]
+use crate::header::sys_time::itimerval;
 use crate::{
     error::{Errno, Result},
     header::{
         bits_timespec::timespec,
         signal::{sigaction, siginfo_t, sigset_t, sigval, stack_t},
-        sys_time::itimerval,
     },
 };
 
 /// Platform abstraction of signal-related functionality.
 pub trait PalSignal: Pal {
     /// Platform implementation of [`getitimer()`](crate::header::sys_time::getitimer) from [`sys/time.h`](crate::header::sys_time).
+    #[allow(deprecated)]
     fn getitimer(which: c_int, out: &mut itimerval) -> Result<()>;
 
     /// Platform implementation of [`kill()`](crate::header::signal::kill) from [`signal.h`](crate::header::signal).
@@ -29,6 +31,7 @@ pub trait PalSignal: Pal {
     fn raise(sig: c_int) -> Result<()>;
 
     /// Platform implementation of [`setitimer()`](crate::header::sys_time::setitimer) from [`sys/time.h`](crate::header::sys_time).
+    #[allow(deprecated)]
     fn setitimer(which: c_int, new: &itimerval, old: Option<&mut itimerval>) -> Result<()>;
 
     /// Platform implementation of [`alarm()`](crate::header::unistd::alarm) from [`unistd.h`](crate::header::unistd).
diff --git a/src/platform/redox/signal.rs b/src/platform/redox/signal.rs
index e4b17865c1..7987528708 100644
--- a/src/platform/redox/signal.rs
+++ b/src/platform/redox/signal.rs
@@ -2,6 +2,8 @@ use super::{
     super::{Pal, PalSignal, types::*},
     Sys,
 };
+#[allow(deprecated)]
+use crate::header::sys_time::{ITIMER_REAL, itimerval};
 use crate::{
     error::{Errno, Result},
     header::{
@@ -12,7 +14,6 @@ use crate::{
             SS_DISABLE, SS_ONSTACK, sigaction, sigevent, siginfo_t, sigset_t, sigval, stack_t,
             ucontext_t,
         },
-        sys_time::{ITIMER_REAL, itimerval},
         time::{itimerspec, timer_internal_t},
     },
     out::Out,
@@ -58,6 +59,7 @@ const _: () = {
 };
 
 impl PalSignal for Sys {
+    #[allow(deprecated)]
     fn getitimer(which: c_int, out: &mut itimerval) -> Result<()> {
         let path = match which {
             ITIMER_REAL => "/scheme/itimer/1",
@@ -100,6 +102,7 @@ impl PalSignal for Sys {
         unsafe { Self::rlct_kill(Self::current_os_tid(), sig as _) }
     }
 
+    #[allow(deprecated)]
     fn setitimer(which: c_int, _new: &itimerval, old: Option<&mut itimerval>) -> Result<()> {
         // TODO: setitimer is no longer part of POSIX and should not be implemented in Redox
         // Change the platform-independent implementation to use POSIX timers.