diff --git a/Cargo.lock b/Cargo.lock
index 7c6c10cdbd726..4a92ef7c01dd8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5999,7 +5999,6 @@ dependencies = [
 name = "unwind"
 version = "0.0.0"
 dependencies = [
- "cfg-if",
  "compiler_builtins",
  "core",
  "libc",
diff --git a/library/core/src/ffi/mod.rs b/library/core/src/ffi/mod.rs
index 44200926a32eb..20d26334d1365 100644
--- a/library/core/src/ffi/mod.rs
+++ b/library/core/src/ffi/mod.rs
@@ -71,9 +71,9 @@ pub type c_ptrdiff_t = isize;
 pub type c_ssize_t = isize;
 
 mod c_char_definition {
-    cfg_if! {
+    crate::cfg_match! {
         // These are the targets on which c_char is unsigned.
-        if #[cfg(any(
+        cfg(any(
             all(
                 target_os = "linux",
                 any(
@@ -124,9 +124,10 @@ mod c_char_definition {
             ),
             all(target_os = "nto", target_arch = "aarch64"),
             target_os = "horizon"
-        ))] {
+        )) => {
             pub type c_char = u8;
-        } else {
+        }
+        _ => {
             // On every other target, c_char is signed.
             pub type c_char = i8;
         }
@@ -134,11 +135,12 @@ mod c_char_definition {
 }
 
 mod c_int_definition {
-    cfg_if! {
-        if #[cfg(any(target_arch = "avr", target_arch = "msp430"))] {
+    crate::cfg_match! {
+        cfg(any(target_arch = "avr", target_arch = "msp430")) => {
             pub type c_int = i16;
             pub type c_uint = u16;
-        } else {
+        }
+        _ => {
             pub type c_int = i32;
             pub type c_uint = u32;
         }
@@ -146,11 +148,12 @@ mod c_int_definition {
 }
 
 mod c_long_definition {
-    cfg_if! {
-        if #[cfg(all(target_pointer_width = "64", not(windows)))] {
+    crate::cfg_match! {
+        cfg(all(target_pointer_width = "64", not(windows))) => {
             pub type c_long = i64;
             pub type c_ulong = u64;
-        } else {
+        }
+        _ =>{
             // The minimal size of `long` in the C standard is 32 bits
             pub type c_long = i32;
             pub type c_ulong = u32;
diff --git a/library/core/src/internal_macros.rs b/library/core/src/internal_macros.rs
index bf53b2245ac59..238825e175520 100644
--- a/library/core/src/internal_macros.rs
+++ b/library/core/src/internal_macros.rs
@@ -120,80 +120,3 @@ macro_rules! impl_fn_for_zst {
         )+
     }
 }
-
-/// A macro for defining `#[cfg]` if-else statements.
-///
-/// `cfg_if` is similar to the `if/elif` C preprocessor macro by allowing definition of a cascade
-/// of `#[cfg]` cases, emitting the implementation which matches first.
-///
-/// This allows you to conveniently provide a long list `#[cfg]`'d blocks of code without having to
-/// rewrite each clause multiple times.
-///
-/// # Example
-///
-/// ```ignore(cannot-test-this-because-non-exported-macro)
-/// cfg_if! {
-///     if #[cfg(unix)] {
-///         fn foo() { /* unix specific functionality */ }
-///     } else if #[cfg(target_pointer_width = "32")] {
-///         fn foo() { /* non-unix, 32-bit functionality */ }
-///     } else {
-///         fn foo() { /* fallback implementation */ }
-///     }
-/// }
-///
-/// # fn main() {}
-/// ```
-// This is a copy of `cfg_if!` from the `cfg_if` crate.
-// The recursive invocations should use $crate if this is ever exported.
-macro_rules! cfg_if {
-    // match if/else chains with a final `else`
-    (
-        $(
-            if #[cfg( $i_meta:meta )] { $( $i_tokens:tt )* }
-        ) else+
-        else { $( $e_tokens:tt )* }
-    ) => {
-        cfg_if! {
-            @__items () ;
-            $(
-                (( $i_meta ) ( $( $i_tokens )* )) ,
-            )+
-            (() ( $( $e_tokens )* )) ,
-        }
-    };
-
-    // Internal and recursive macro to emit all the items
-    //
-    // Collects all the previous cfgs in a list at the beginning, so they can be
-    // negated. After the semicolon is all the remaining items.
-    (@__items ( $( $_:meta , )* ) ; ) => {};
-    (
-        @__items ( $( $no:meta , )* ) ;
-        (( $( $yes:meta )? ) ( $( $tokens:tt )* )) ,
-        $( $rest:tt , )*
-    ) => {
-        // Emit all items within one block, applying an appropriate #[cfg]. The
-        // #[cfg] will require all `$yes` matchers specified and must also negate
-        // all previous matchers.
-        #[cfg(all(
-            $( $yes , )?
-            not(any( $( $no ),* ))
-        ))]
-        cfg_if! { @__identity $( $tokens )* }
-
-        // Recurse to emit all other items in `$rest`, and when we do so add all
-        // our `$yes` matchers to the list of `$no` matchers as future emissions
-        // will have to negate everything we just matched as well.
-        cfg_if! {
-            @__items ( $( $no , )* $( $yes , )? ) ;
-            $( $rest , )*
-        }
-    };
-
-    // Internal macro to make __apply work out right for different match types,
-    // because of how macros match/expand stuff.
-    (@__identity $( $tokens:tt )* ) => {
-        $( $tokens )*
-    };
-}
diff --git a/library/core/src/lib.rs b/library/core/src/lib.rs
index b54680a61b4d8..1ead126b83b04 100644
--- a/library/core/src/lib.rs
+++ b/library/core/src/lib.rs
@@ -111,6 +111,7 @@
 //
 // Library features:
 // tidy-alphabetical-start
+#![feature(cfg_match)]
 #![feature(char_indices_offset)]
 #![feature(const_align_of_val)]
 #![feature(const_align_of_val_raw)]
diff --git a/library/panic_abort/src/lib.rs b/library/panic_abort/src/lib.rs
index c44f23eea8094..f1606edc1407d 100644
--- a/library/panic_abort/src/lib.rs
+++ b/library/panic_abort/src/lib.rs
@@ -8,6 +8,7 @@
 #![doc(issue_tracker_base_url = "https://github.com/rust-lang/rust/issues/")]
 #![panic_runtime]
 #![allow(unused_features)]
+#![feature(cfg_match)]
 #![feature(core_intrinsics)]
 #![feature(panic_runtime)]
 #![feature(std_internals)]
@@ -42,16 +43,17 @@ pub unsafe fn __rust_start_panic(_payload: &mut dyn PanicPayload) -> u32 {
 
     abort();
 
-    cfg_if::cfg_if! {
-        if #[cfg(any(unix, target_os = "solid_asp3"))] {
+    cfg_match! {
+        cfg(any(unix, target_os = "solid_asp3")) => {
             unsafe fn abort() -> ! {
                 libc::abort();
             }
-        } else if #[cfg(any(target_os = "hermit",
-                            all(target_vendor = "fortanix", target_env = "sgx"),
-                            target_os = "xous",
-                            target_os = "uefi",
-        ))] {
+        }
+        cfg(any(target_os = "hermit",
+            all(target_vendor = "fortanix", target_env = "sgx"),
+            target_os = "xous",
+            target_os = "uefi",
+        )) => {
             unsafe fn abort() -> ! {
                 // call std::sys::abort_internal
                 extern "C" {
@@ -59,7 +61,8 @@ pub unsafe fn __rust_start_panic(_payload: &mut dyn PanicPayload) -> u32 {
                 }
                 __rust_abort();
             }
-        } else if #[cfg(all(windows, not(miri)))] {
+        }
+        cfg(all(windows, not(miri))) => {
             // On Windows, use the processor-specific __fastfail mechanism. In Windows 8
             // and later, this will terminate the process immediately without running any
             // in-process exception handlers. In earlier versions of Windows, this
@@ -86,7 +89,8 @@ pub unsafe fn __rust_start_panic(_payload: &mut dyn PanicPayload) -> u32 {
                 }
                 core::intrinsics::unreachable();
             }
-        } else if #[cfg(target_os = "teeos")] {
+        }
+        cfg(target_os = "teeos") => {
             mod teeos {
                 extern "C" {
                     pub fn TEE_Panic(code: u32) -> !;
@@ -96,7 +100,8 @@ pub unsafe fn __rust_start_panic(_payload: &mut dyn PanicPayload) -> u32 {
             unsafe fn abort() -> ! {
                 teeos::TEE_Panic(1);
             }
-        } else {
+        }
+        _ => {
             unsafe fn abort() -> ! {
                 core::intrinsics::abort();
             }
diff --git a/library/panic_unwind/src/lib.rs b/library/panic_unwind/src/lib.rs
index 7a0bae34642d6..1c72bbe594e33 100644
--- a/library/panic_unwind/src/lib.rs
+++ b/library/panic_unwind/src/lib.rs
@@ -14,6 +14,7 @@
 #![no_std]
 #![unstable(feature = "panic_unwind", issue = "32837")]
 #![doc(issue_tracker_base_url = "https://github.com/rust-lang/rust/issues/")]
+#![feature(cfg_match)]
 #![feature(core_intrinsics)]
 #![feature(lang_items)]
 #![feature(panic_unwind)]
@@ -31,32 +32,37 @@ use alloc::boxed::Box;
 use core::any::Any;
 use core::panic::PanicPayload;
 
-cfg_if::cfg_if! {
-    if #[cfg(target_os = "emscripten")] {
+cfg_match! {
+    cfg(target_os = "emscripten") => {
         #[path = "emcc.rs"]
         mod real_imp;
-    } else if #[cfg(target_os = "hermit")] {
+    }
+    cfg(target_os = "hermit") => {
         #[path = "hermit.rs"]
         mod real_imp;
-    } else if #[cfg(target_os = "l4re")] {
+    }
+    cfg(target_os = "l4re") => {
         // L4Re is unix family but does not yet support unwinding.
         #[path = "dummy.rs"]
         mod real_imp;
-    } else if #[cfg(all(target_env = "msvc", not(target_arch = "arm")))] {
+    }
+    cfg(all(target_env = "msvc", not(target_arch = "arm"))) => {
         // LLVM does not support unwinding on 32 bit ARM msvc (thumbv7a-pc-windows-msvc)
         #[path = "seh.rs"]
         mod real_imp;
-    } else if #[cfg(any(
+    }
+    cfg(any(
         all(target_family = "windows", target_env = "gnu"),
         target_os = "psp",
         target_os = "xous",
         target_os = "solid_asp3",
         all(target_family = "unix", not(target_os = "espidf")),
         all(target_vendor = "fortanix", target_env = "sgx"),
-    ))] {
+    )) => {
         #[path = "gcc.rs"]
         mod real_imp;
-    } else {
+    }
+    _ => {
         // Targets that don't support unwinding.
         // - family=wasm
         // - os=none ("bare metal" targets)
@@ -69,14 +75,15 @@ cfg_if::cfg_if! {
     }
 }
 
-cfg_if::cfg_if! {
-    if #[cfg(miri)] {
+cfg_match! {
+    cfg(miri) => {
         // Use the Miri runtime.
         // We still need to also load the normal runtime above, as rustc expects certain lang
         // items from there to be defined.
         #[path = "miri.rs"]
         mod imp;
-    } else {
+    }
+    _ => {
         // Use the real runtime.
         use real_imp as imp;
     }
diff --git a/library/panic_unwind/src/seh.rs b/library/panic_unwind/src/seh.rs
index d3ba546d730d4..02bc623ef0587 100644
--- a/library/panic_unwind/src/seh.rs
+++ b/library/panic_unwind/src/seh.rs
@@ -253,10 +253,11 @@ macro_rules! define_cleanup {
         }
     }
 }
-cfg_if::cfg_if! {
-   if #[cfg(target_arch = "x86")] {
+cfg_match! {
+   cfg(target_arch = "x86") => {
        define_cleanup!("thiscall" "thiscall-unwind");
-   } else {
+   }
+   _ => {
        define_cleanup!("C" "C-unwind");
    }
 }
diff --git a/library/std/src/lib.rs b/library/std/src/lib.rs
index c6cd2c6786ad6..d65458c8ba689 100644
--- a/library/std/src/lib.rs
+++ b/library/std/src/lib.rs
@@ -314,6 +314,7 @@
 //
 // Library features (core):
 // tidy-alphabetical-start
+#![feature(cfg_match)]
 #![feature(char_internals)]
 #![feature(core_intrinsics)]
 #![feature(core_io_borrowed_buf)]
diff --git a/library/std/src/os/unix/process.rs b/library/std/src/os/unix/process.rs
index e45457b2e42b4..69e7853ca5c29 100644
--- a/library/std/src/os/unix/process.rs
+++ b/library/std/src/os/unix/process.rs
@@ -12,19 +12,19 @@ use crate::sealed::Sealed;
 use crate::sys;
 use crate::sys_common::{AsInner, AsInnerMut, FromInner, IntoInner};
 
-use cfg_if::cfg_if;
-
-cfg_if! {
-    if #[cfg(any(target_os = "vxworks", target_os = "espidf", target_os = "horizon", target_os = "vita"))] {
+cfg_match! {
+    cfg(any(target_os = "vxworks", target_os = "espidf", target_os = "horizon", target_os = "vita")) => {
         type UserId = u16;
         type GroupId = u16;
-    } else if #[cfg(target_os = "nto")] {
+    }
+    cfg(target_os = "nto") => {
         // Both IDs are signed, see `sys/target_nto.h` of the QNX Neutrino SDP.
         // Only positive values should be used, see e.g.
         // https://www.qnx.com/developers/docs/7.1/#com.qnx.doc.neutrino.lib_ref/topic/s/setuid.html
         type UserId = i32;
         type GroupId = i32;
-    } else {
+    }
+    _ => {
         type UserId = u32;
         type GroupId = u32;
     }
diff --git a/library/std/src/sys/pal/common/thread_local/mod.rs b/library/std/src/sys/pal/common/thread_local/mod.rs
index 8b2c839f837d4..b33ac8618d26f 100644
--- a/library/std/src/sys/pal/common/thread_local/mod.rs
+++ b/library/std/src/sys/pal/common/thread_local/mod.rs
@@ -5,18 +5,20 @@
 // "fast" key type is accessed via code generated via LLVM, where TLS keys are set up by the linker.
 // "static" is for single-threaded platforms where a global static is sufficient.
 
-cfg_if::cfg_if! {
-    if #[cfg(any(all(target_family = "wasm", not(target_feature = "atomics")), target_os = "uefi"))] {
+cfg_match! {
+    cfg(any(all(target_family = "wasm", not(target_feature = "atomics")), target_os = "uefi")) => {
         #[doc(hidden)]
         mod static_local;
         #[doc(hidden)]
         pub use static_local::{Key, thread_local_inner};
-    } else if #[cfg(target_thread_local)] {
+    }
+    cfg(target_thread_local) => {
         #[doc(hidden)]
         mod fast_local;
         #[doc(hidden)]
         pub use fast_local::{Key, thread_local_inner};
-    } else {
+    }
+    _ => {
         #[doc(hidden)]
         mod os_local;
         #[doc(hidden)]
diff --git a/library/std/src/sys/pal/unix/alloc.rs b/library/std/src/sys/pal/unix/alloc.rs
index af0089978ecbb..c289115891446 100644
--- a/library/std/src/sys/pal/unix/alloc.rs
+++ b/library/std/src/sys/pal/unix/alloc.rs
@@ -52,8 +52,8 @@ unsafe impl GlobalAlloc for System {
     }
 }
 
-cfg_if::cfg_if! {
-    if #[cfg(any(
+cfg_match! {
+    cfg(any(
         target_os = "android",
         target_os = "illumos",
         target_os = "redox",
@@ -61,7 +61,7 @@ cfg_if::cfg_if! {
         target_os = "espidf",
         target_os = "horizon",
         target_os = "vita",
-    ))] {
+    )) => {
         #[inline]
         unsafe fn aligned_malloc(layout: &Layout) -> *mut u8 {
             // On android we currently target API level 9 which unfortunately
@@ -83,7 +83,8 @@ cfg_if::cfg_if! {
             //                                       /memory/aligned_memory.cc
             libc::memalign(layout.align(), layout.size()) as *mut u8
         }
-    } else if #[cfg(target_os = "wasi")] {
+    }
+    cfg(target_os = "wasi") => {
         #[inline]
         unsafe fn aligned_malloc(layout: &Layout) -> *mut u8 {
             // C11 aligned_alloc requires that the size be a multiple of the alignment.
@@ -92,7 +93,8 @@ cfg_if::cfg_if! {
             let size = layout.size().next_multiple_of(align);
             libc::aligned_alloc(align, size) as *mut u8
         }
-    } else {
+    }
+    _ => {
         #[inline]
         unsafe fn aligned_malloc(layout: &Layout) -> *mut u8 {
             let mut out = ptr::null_mut();
diff --git a/library/std/src/sys/pal/unix/locks/mod.rs b/library/std/src/sys/pal/unix/locks/mod.rs
index a49247310b54c..eb07601e5541e 100644
--- a/library/std/src/sys/pal/unix/locks/mod.rs
+++ b/library/std/src/sys/pal/unix/locks/mod.rs
@@ -1,26 +1,28 @@
-cfg_if::cfg_if! {
-    if #[cfg(any(
+cfg_match! {
+    cfg(any(
         target_os = "linux",
         target_os = "android",
         all(target_os = "emscripten", target_feature = "atomics"),
         target_os = "freebsd",
         target_os = "openbsd",
         target_os = "dragonfly",
-    ))] {
+    )) => {
         mod futex_mutex;
         mod futex_rwlock;
         mod futex_condvar;
         pub(crate) use futex_mutex::Mutex;
         pub(crate) use futex_rwlock::RwLock;
         pub(crate) use futex_condvar::Condvar;
-    } else if #[cfg(target_os = "fuchsia")] {
+    }
+    cfg(target_os = "fuchsia") => {
         mod fuchsia_mutex;
         mod futex_rwlock;
         mod futex_condvar;
         pub(crate) use fuchsia_mutex::Mutex;
         pub(crate) use futex_rwlock::RwLock;
         pub(crate) use futex_condvar::Condvar;
-    } else {
+    }
+    _ => {
         mod pthread_mutex;
         mod pthread_condvar;
         mod queue_rwlock;
diff --git a/library/std/src/sys/pal/unix/mod.rs b/library/std/src/sys/pal/unix/mod.rs
index 976a437c17ff9..efd876ee894d2 100644
--- a/library/std/src/sys/pal/unix/mod.rs
+++ b/library/std/src/sys/pal/unix/mod.rs
@@ -371,31 +371,36 @@ pub fn abort_internal() -> ! {
     unsafe { libc::abort() }
 }
 
-cfg_if::cfg_if! {
-    if #[cfg(target_os = "android")] {
+cfg_match! {
+    cfg(target_os = "android") => {
         #[link(name = "dl", kind = "static", modifiers = "-bundle",
             cfg(target_feature = "crt-static"))]
         #[link(name = "dl", cfg(not(target_feature = "crt-static")))]
         #[link(name = "log", cfg(not(target_feature = "crt-static")))]
         extern "C" {}
-    } else if #[cfg(target_os = "freebsd")] {
+    }
+    cfg(target_os = "freebsd") => {
         #[link(name = "execinfo")]
         #[link(name = "pthread")]
         extern "C" {}
-    } else if #[cfg(target_os = "netbsd")] {
+    }
+    cfg(target_os = "netbsd") => {
         #[link(name = "pthread")]
         #[link(name = "rt")]
         extern "C" {}
-    } else if #[cfg(any(target_os = "dragonfly", target_os = "openbsd"))] {
+    }
+    cfg(any(target_os = "dragonfly", target_os = "openbsd")) => {
         #[link(name = "pthread")]
         extern "C" {}
-    } else if #[cfg(target_os = "solaris")] {
+    }
+    cfg(target_os = "solaris") => {
         #[link(name = "socket")]
         #[link(name = "posix4")]
         #[link(name = "pthread")]
         #[link(name = "resolv")]
         extern "C" {}
-    } else if #[cfg(target_os = "illumos")] {
+    }
+    cfg(target_os = "illumos") => {
         #[link(name = "socket")]
         #[link(name = "posix4")]
         #[link(name = "pthread")]
@@ -404,22 +409,27 @@ cfg_if::cfg_if! {
         // Use libumem for the (malloc-compatible) allocator
         #[link(name = "umem")]
         extern "C" {}
-    } else if #[cfg(target_os = "macos")] {
+    }
+    cfg(target_os = "macos") => {
         #[link(name = "System")]
         extern "C" {}
-    } else if #[cfg(any(target_os = "ios", target_os = "tvos", target_os = "watchos"))] {
+    }
+    cfg(any(target_os = "ios", target_os = "tvos", target_os = "watchos")) => {
         #[link(name = "System")]
         #[link(name = "objc")]
         #[link(name = "Foundation", kind = "framework")]
         extern "C" {}
-    } else if #[cfg(target_os = "fuchsia")] {
+    }
+    cfg(target_os = "fuchsia") => {
         #[link(name = "zircon")]
         #[link(name = "fdio")]
         extern "C" {}
-    } else if #[cfg(all(target_os = "linux", target_env = "uclibc"))] {
+    }
+    cfg(all(target_os = "linux", target_env = "uclibc")) => {
         #[link(name = "dl")]
         extern "C" {}
-    } else if #[cfg(target_os = "vita")] {
+    }
+    cfg(target_os = "vita") => {
         #[link(name = "pthread", kind = "static", modifiers = "-bundle")]
         extern "C" {}
     }
diff --git a/library/std/src/sys/pal/unix/os.rs b/library/std/src/sys/pal/unix/os.rs
index 881b3a25c5152..95676602c6194 100644
--- a/library/std/src/sys/pal/unix/os.rs
+++ b/library/std/src/sys/pal/unix/os.rs
@@ -31,10 +31,11 @@ use libc::{c_char, c_int, c_void};
 
 const TMPBUF_SZ: usize = 128;
 
-cfg_if::cfg_if! {
-    if #[cfg(target_os = "redox")] {
+cfg_match! {
+    cfg(target_os = "redox") => {
         const PATH_SEPARATOR: u8 = b';';
-    } else {
+    }
+    _ => {
         const PATH_SEPARATOR: u8 = b':';
     }
 }
diff --git a/library/std/src/sys/pal/unix/process/mod.rs b/library/std/src/sys/pal/unix/process/mod.rs
index 074f0a105e329..c7457e7b2c2b0 100644
--- a/library/std/src/sys/pal/unix/process/mod.rs
+++ b/library/std/src/sys/pal/unix/process/mod.rs
@@ -8,19 +8,22 @@ mod process_common;
 #[cfg(any(target_os = "espidf", target_os = "horizon", target_os = "vita"))]
 mod process_unsupported;
 
-cfg_if::cfg_if! {
-    if #[cfg(target_os = "fuchsia")] {
+cfg_match! {
+    cfg(target_os = "fuchsia") => {
         #[path = "process_fuchsia.rs"]
         mod process_inner;
         mod zircon;
-    } else if #[cfg(target_os = "vxworks")] {
+    }
+    cfg(target_os = "vxworks") => {
         #[path = "process_vxworks.rs"]
         mod process_inner;
-    } else if #[cfg(any(target_os = "espidf", target_os = "horizon", target_os = "vita"))] {
+    }
+    cfg(any(target_os = "espidf", target_os = "horizon", target_os = "vita")) => {
         mod process_inner {
             pub use super::process_unsupported::*;
         }
-    } else {
+    }
+    _ => {
         #[path = "process_unix.rs"]
         mod process_inner;
     }
diff --git a/library/std/src/sys/pal/unix/process/process_common.rs b/library/std/src/sys/pal/unix/process/process_common.rs
index f615e8086dccf..9fcc9df2e8102 100644
--- a/library/std/src/sys/pal/unix/process/process_common.rs
+++ b/library/std/src/sys/pal/unix/process/process_common.rs
@@ -20,14 +20,17 @@ use crate::sys::fs::OpenOptions;
 
 use libc::{c_char, c_int, gid_t, pid_t, uid_t, EXIT_FAILURE, EXIT_SUCCESS};
 
-cfg_if::cfg_if! {
-    if #[cfg(target_os = "fuchsia")] {
+cfg_match! {
+    cfg(target_os = "fuchsia") => {
         // fuchsia doesn't have /dev/null
-    } else if #[cfg(target_os = "redox")] {
+    }
+    cfg(target_os = "redox") => {
         const DEV_NULL: &CStr = c"null:";
-    } else if #[cfg(target_os = "vxworks")] {
+    }
+    cfg(target_os = "vxworks") => {
         const DEV_NULL: &CStr = c"/null";
-    } else {
+    }
+    _ => {
         const DEV_NULL: &CStr = c"/dev/null";
     }
 }
@@ -37,8 +40,8 @@ cfg_if::cfg_if! {
 // to support older Android version (independent of libc version).
 // The following implementations are based on
 // https://github.com/aosp-mirror/platform_bionic/blob/ad8dcd6023294b646e5a8288c0ed431b0845da49/libc/include/android/legacy_signal_inlines.h
-cfg_if::cfg_if! {
-    if #[cfg(target_os = "android")] {
+cfg_match! {
+    cfg(target_os = "android") => {
         #[allow(dead_code)]
         pub unsafe fn sigemptyset(set: *mut libc::sigset_t) -> libc::c_int {
             set.write_bytes(0u8, 1);
@@ -74,8 +77,8 @@ cfg_if::cfg_if! {
             raw[bit / LONG_BIT] |= 1 << (bit % LONG_BIT);
             return 0;
         }
-    } else {
-        #[allow(unused_imports)]
+    }
+    _ => {
         pub use libc::{sigemptyset, sigaddset};
     }
 }
diff --git a/library/std/src/sys/pal/unix/process/process_unix.rs b/library/std/src/sys/pal/unix/process/process_unix.rs
index d5a77085725c5..9207dc5a0298f 100644
--- a/library/std/src/sys/pal/unix/process/process_unix.rs
+++ b/library/std/src/sys/pal/unix/process/process_unix.rs
@@ -36,9 +36,8 @@ use libc::{c_int, pid_t};
 )))]
 use libc::{gid_t, uid_t};
 
-cfg_if::cfg_if! {
-    if #[cfg(all(target_os = "nto", target_env = "nto71"))] {
-        use crate::thread;
+cfg_match! {
+    cfg(all(target_os = "nto", target_env = "nto71")) => {
         use libc::{c_char, posix_spawn_file_actions_t, posix_spawnattr_t};
         use crate::time::Duration;
         use crate::sync::LazyLock;
diff --git a/library/std/src/sys/pal/unix/thread_parking/mod.rs b/library/std/src/sys/pal/unix/thread_parking/mod.rs
index 185333c072f49..b3c9b69d1a87f 100644
--- a/library/std/src/sys/pal/unix/thread_parking/mod.rs
+++ b/library/std/src/sys/pal/unix/thread_parking/mod.rs
@@ -10,8 +10,8 @@
     target_os = "fuchsia",
 )))]
 
-cfg_if::cfg_if! {
-    if #[cfg(all(
+cfg_match! {
+    cfg(all(
         any(
             target_os = "macos",
             target_os = "ios",
@@ -19,13 +19,15 @@ cfg_if::cfg_if! {
             target_os = "tvos",
         ),
         not(miri),
-    ))] {
+    )) => {
         mod darwin;
         pub use darwin::Parker;
-    } else if #[cfg(target_os = "netbsd")] {
+    }
+    cfg(target_os = "netbsd") => {
         mod netbsd;
         pub use netbsd::{current, park, park_timeout, unpark, ThreadId};
-    } else {
+    }
+    _ => {
         mod pthread;
         pub use pthread::Parker;
     }
diff --git a/library/std/src/sys/pal/wasi/mod.rs b/library/std/src/sys/pal/wasi/mod.rs
index 116878ee99681..6b737332f1f93 100644
--- a/library/std/src/sys/pal/wasi/mod.rs
+++ b/library/std/src/sys/pal/wasi/mod.rs
@@ -42,8 +42,8 @@ pub mod thread_local_dtor;
 pub mod thread_local_key;
 pub mod time;
 
-cfg_if::cfg_if! {
-    if #[cfg(target_feature = "atomics")] {
+cfg_match! {
+    cfg(target_feature = "atomics") => {
         #[path = "../unix/locks"]
         pub mod locks {
             #![allow(unsafe_op_in_unsafe_fn)]
@@ -54,7 +54,8 @@ cfg_if::cfg_if! {
             pub(crate) use futex_mutex::Mutex;
             pub(crate) use futex_rwlock::RwLock;
         }
-    } else {
+    }
+    _ => {
         #[path = "../unsupported/locks/mod.rs"]
         pub mod locks;
         #[path = "../unsupported/once.rs"]
diff --git a/library/std/src/sys/pal/wasi/os.rs b/library/std/src/sys/pal/wasi/os.rs
index 530d360217216..b79f502c2441e 100644
--- a/library/std/src/sys/pal/wasi/os.rs
+++ b/library/std/src/sys/pal/wasi/os.rs
@@ -25,8 +25,8 @@ mod libc {
     }
 }
 
-cfg_if::cfg_if! {
-    if #[cfg(target_feature = "atomics")] {
+cfg_match! {
+    cfg(target_feature = "atomics") => {
         // Access to the environment must be protected by a lock in multi-threaded scenarios.
         use crate::sync::{PoisonError, RwLock};
         static ENV_LOCK: RwLock<()> = RwLock::new(());
@@ -36,7 +36,8 @@ cfg_if::cfg_if! {
         pub fn env_write_lock() -> impl Drop {
             ENV_LOCK.write().unwrap_or_else(PoisonError::into_inner)
         }
-    } else {
+    }
+    _ => {
         // No need for a lock if we are single-threaded.
         pub fn env_read_lock() -> impl Drop {
             Box::new(())
diff --git a/library/std/src/sys/pal/wasi/thread.rs b/library/std/src/sys/pal/wasi/thread.rs
index 77d8b4378e7d5..342d81b03e5f4 100644
--- a/library/std/src/sys/pal/wasi/thread.rs
+++ b/library/std/src/sys/pal/wasi/thread.rs
@@ -5,8 +5,8 @@ use crate::num::NonZero;
 use crate::sys::unsupported;
 use crate::time::Duration;
 
-cfg_if::cfg_if! {
-    if #[cfg(target_feature = "atomics")] {
+cfg_match! {
+    cfg(target_feature = "atomics") => {
         use crate::cmp;
         use crate::ptr;
         use crate::sys::os;
@@ -61,7 +61,8 @@ cfg_if::cfg_if! {
                 debug_assert_eq!(ret, 0);
             }
         }
-    } else {
+    }
+    _ => {
         pub struct Thread(!);
     }
 }
@@ -70,8 +71,8 @@ pub const DEFAULT_MIN_STACK_SIZE: usize = 4096;
 
 impl Thread {
     // unsafe: see thread::Builder::spawn_unchecked for safety requirements
-    cfg_if::cfg_if! {
-        if #[cfg(target_feature = "atomics")] {
+    cfg_match! {
+        cfg(target_feature = "atomics") => {
             pub unsafe fn new(stack: usize, p: Box<dyn FnOnce()>) -> io::Result<Thread> {
                 let p = Box::into_raw(Box::new(p));
                 let mut native: libc::pthread_t = mem::zeroed();
@@ -118,7 +119,8 @@ impl Thread {
                     ptr::null_mut()
                 }
             }
-        } else {
+        }
+        _ => {
             pub unsafe fn new(_stack: usize, _p: Box<dyn FnOnce()>) -> io::Result<Thread> {
                 unsupported()
             }
diff --git a/library/std/src/sys/pal/wasm/mod.rs b/library/std/src/sys/pal/wasm/mod.rs
index 567555118d707..f722744714a8e 100644
--- a/library/std/src/sys/pal/wasm/mod.rs
+++ b/library/std/src/sys/pal/wasm/mod.rs
@@ -41,8 +41,8 @@ pub mod thread_local_key;
 #[path = "../unsupported/time.rs"]
 pub mod time;
 
-cfg_if::cfg_if! {
-    if #[cfg(target_feature = "atomics")] {
+cfg_match! {
+    cfg(target_feature = "atomics") => {
         #[path = "../unix/locks"]
         pub mod locks {
             #![allow(unsafe_op_in_unsafe_fn)]
@@ -57,7 +57,8 @@ cfg_if::cfg_if! {
         pub mod futex;
         #[path = "atomics/thread.rs"]
         pub mod thread;
-    } else {
+    }
+    _ => {
         #[path = "../unsupported/locks/mod.rs"]
         pub mod locks;
         #[path = "../unsupported/once.rs"]
diff --git a/library/std/src/sys/pal/windows/c.rs b/library/std/src/sys/pal/windows/c.rs
index 1a59ac9a9cadf..cd8a7d72e9e18 100644
--- a/library/std/src/sys/pal/windows/c.rs
+++ b/library/std/src/sys/pal/windows/c.rs
@@ -196,11 +196,8 @@ pub struct in6_addr {
 }
 
 // Desktop specific functions & types
-cfg_if::cfg_if! {
-if #[cfg(not(target_vendor = "uwp"))] {
-    pub const EXCEPTION_CONTINUE_SEARCH: i32 = 0;
-}
-}
+#[cfg(not(target_vendor = "uwp"))]
+pub const EXCEPTION_CONTINUE_SEARCH: i32 = 0;
 
 pub unsafe extern "system" fn WriteFileEx(
     hFile: BorrowedHandle<'_>,
@@ -270,8 +267,8 @@ pub unsafe fn getaddrinfo(
     windows_sys::getaddrinfo(node.cast::<u8>(), service.cast::<u8>(), hints, res)
 }
 
-cfg_if::cfg_if! {
-if #[cfg(not(target_vendor = "uwp"))] {
+cfg_match! {
+cfg(not(target_vendor = "uwp")) => {
 pub unsafe fn NtReadFile(
     filehandle: BorrowedHandle<'_>,
     event: HANDLE,
@@ -442,26 +439,27 @@ compat_fn_with_fallback! {
 // are not included in the win32 metadata. We work around that by defining them here.
 //
 // Where possible, these definitions should be kept in sync with https://docs.rs/windows-sys
-cfg_if::cfg_if! {
-if #[cfg(not(target_vendor = "uwp"))] {
-    #[link(name = "kernel32")]
-    extern "system" {
-        pub fn AddVectoredExceptionHandler(
-            first: u32,
-            handler: PVECTORED_EXCEPTION_HANDLER,
-        ) -> *mut c_void;
-    }
-    pub type PVECTORED_EXCEPTION_HANDLER = Option<
-        unsafe extern "system" fn(exceptioninfo: *mut EXCEPTION_POINTERS) -> i32,
-    >;
-    #[repr(C)]
-    pub struct EXCEPTION_POINTERS {
-        pub ExceptionRecord: *mut EXCEPTION_RECORD,
-        pub ContextRecord: *mut CONTEXT,
+cfg_match! {
+    cfg(not(target_vendor = "uwp")) => {
+        #[link(name = "kernel32")]
+        extern "system" {
+            pub fn AddVectoredExceptionHandler(
+                first: u32,
+                handler: PVECTORED_EXCEPTION_HANDLER,
+            ) -> *mut c_void;
+        }
+        pub type PVECTORED_EXCEPTION_HANDLER = Option<
+            unsafe extern "system" fn(exceptioninfo: *mut EXCEPTION_POINTERS) -> i32,
+        >;
+        #[repr(C)]
+        pub struct EXCEPTION_POINTERS {
+            pub ExceptionRecord: *mut EXCEPTION_RECORD,
+            pub ContextRecord: *mut CONTEXT,
+        }
+        #[cfg(target_arch = "arm")]
+        pub enum CONTEXT {}
     }
-    #[cfg(target_arch = "arm")]
-    pub enum CONTEXT {}
-}}
+}
 
 #[link(name = "ws2_32")]
 extern "system" {
diff --git a/library/std/src/sys/pal/windows/mod.rs b/library/std/src/sys/pal/windows/mod.rs
index 726a4509f280f..6ddb87334524b 100644
--- a/library/std/src/sys/pal/windows/mod.rs
+++ b/library/std/src/sys/pal/windows/mod.rs
@@ -32,10 +32,11 @@ pub mod thread_local_dtor;
 pub mod thread_local_key;
 pub mod thread_parking;
 pub mod time;
-cfg_if::cfg_if! {
-    if #[cfg(not(target_vendor = "uwp"))] {
+cfg_match! {
+    cfg(not(target_vendor = "uwp")) => {
         pub mod stack_overflow;
-    } else {
+    }
+    _ => {
         pub mod stack_overflow_uwp;
         pub use self::stack_overflow_uwp as stack_overflow;
     }
diff --git a/library/std/src/sys/personality/gcc.rs b/library/std/src/sys/personality/gcc.rs
index 6f317131145ae..49e85c2623e12 100644
--- a/library/std/src/sys/personality/gcc.rs
+++ b/library/std/src/sys/personality/gcc.rs
@@ -91,8 +91,8 @@ const UNWIND_DATA_REG: (i32, i32) = (4, 5); // a0, a1
 // https://github.com/gcc-mirror/gcc/blob/master/libstdc++-v3/libsupc++/eh_personality.cc
 // https://github.com/gcc-mirror/gcc/blob/trunk/libgcc/unwind-c.c
 
-cfg_if::cfg_if! {
-    if #[cfg(all(target_arch = "arm", not(target_os = "ios"), not(target_os = "tvos"), not(target_os = "watchos"), not(target_os = "netbsd")))] {
+cfg_match! {
+    cfg(all(target_arch = "arm", not(target_os = "ios"), not(target_os = "tvos"), not(target_os = "watchos"), not(target_os = "netbsd"))) => {
         // ARM EHABI personality routine.
         // https://web.archive.org/web/20190728160938/https://infocenter.arm.com/help/topic/com.arm.doc.ihi0038b/IHI0038B_ehabi.pdf
         //
@@ -189,7 +189,8 @@ cfg_if::cfg_if! {
                 ) -> uw::_Unwind_Reason_Code;
             }
         }
-    } else {
+    }
+    _ => {
         // Default personality routine, which is used directly on most targets
         // and indirectly on Windows x86_64 via SEH.
         unsafe extern "C" fn rust_eh_personality_impl(
@@ -232,8 +233,8 @@ cfg_if::cfg_if! {
             }
         }
 
-        cfg_if::cfg_if! {
-            if #[cfg(all(windows, any(target_arch = "aarch64", target_arch = "x86_64"), target_env = "gnu"))] {
+        cfg_match! {
+            cfg(all(windows, any(target_arch = "aarch64", target_arch = "x86_64"), target_env = "gnu")) => {
                 // On x86_64 MinGW targets, the unwinding mechanism is SEH however the unwind
                 // handler data (aka LSDA) uses GCC-compatible encoding.
                 #[lang = "eh_personality"]
@@ -252,7 +253,8 @@ cfg_if::cfg_if! {
                         rust_eh_personality_impl,
                     )
                 }
-            } else {
+            }
+            _ => {
                 // The personality routine for most of our targets.
                 #[lang = "eh_personality"]
                 unsafe extern "C" fn rust_eh_personality(
diff --git a/library/std/src/sys/personality/mod.rs b/library/std/src/sys/personality/mod.rs
index d37b8ce634654..6bfb67307f43b 100644
--- a/library/std/src/sys/personality/mod.rs
+++ b/library/std/src/sys/personality/mod.rs
@@ -13,10 +13,11 @@
 mod dwarf;
 
 #[cfg(not(any(test, doctest)))]
-cfg_if::cfg_if! {
-    if #[cfg(target_os = "emscripten")] {
+cfg_match! {
+    cfg(target_os = "emscripten") => {
         mod emcc;
-    } else if #[cfg(target_env = "msvc")] {
+    }
+    cfg(target_env = "msvc") => {
         // This is required by the compiler to exist (e.g., it's a lang item),
         // but it's never actually called by the compiler because
         // _CxxFrameHandler3 is the personality function that is always used.
@@ -25,16 +26,18 @@ cfg_if::cfg_if! {
         fn rust_eh_personality() {
             core::intrinsics::abort()
         }
-    } else if #[cfg(any(
+    }
+    cfg(any(
         all(target_family = "windows", target_env = "gnu"),
         target_os = "psp",
         target_os = "xous",
         target_os = "solid_asp3",
         all(target_family = "unix", not(target_os = "espidf"), not(target_os = "l4re")),
         all(target_vendor = "fortanix", target_env = "sgx"),
-    ))] {
+    )) => {
         mod gcc;
-    } else {
+    }
+    _ => {
         // Targets that don't support unwinding.
         // - family=wasm
         // - os=none ("bare metal" targets)
diff --git a/library/std/src/sys_common/mod.rs b/library/std/src/sys_common/mod.rs
index 01f83ecb41452..198998ad112c4 100644
--- a/library/std/src/sys_common/mod.rs
+++ b/library/std/src/sys_common/mod.rs
@@ -34,23 +34,25 @@ pub mod thread_parking;
 pub mod wstr;
 pub mod wtf8;
 
-cfg_if::cfg_if! {
-    if #[cfg(target_os = "windows")] {
+cfg_match! {
+    cfg(target_os = "windows") => {
         pub use crate::sys::thread_local_key;
-    } else {
+    }
+    _ => {
         pub mod thread_local_key;
     }
 }
 
-cfg_if::cfg_if! {
-    if #[cfg(any(
+cfg_match! {
+    cfg(any(
         all(unix, not(target_os = "l4re")),
         windows,
         target_os = "hermit",
         target_os = "solid_asp3"
-    ))] {
+    )) => {
         pub mod net;
-    } else {
+    }
+    _ => {
         pub use crate::sys::net;
     }
 }
diff --git a/library/std/src/sys_common/net.rs b/library/std/src/sys_common/net.rs
index 8712bd2eca763..dcbd8c0fbbae1 100644
--- a/library/std/src/sys_common/net.rs
+++ b/library/std/src/sys_common/net.rs
@@ -15,42 +15,46 @@ use crate::time::Duration;
 
 use crate::ffi::{c_int, c_void};
 
-cfg_if::cfg_if! {
-    if #[cfg(any(
+cfg_match! {
+    cfg(any(
         target_os = "dragonfly", target_os = "freebsd",
         target_os = "ios", target_os = "tvos", target_os = "macos", target_os = "watchos",
         target_os = "openbsd", target_os = "netbsd", target_os = "illumos",
-        target_os = "solaris", target_os = "haiku", target_os = "l4re", target_os = "nto"))] {
+        target_os = "solaris", target_os = "haiku", target_os = "l4re", target_os = "nto")) => {
         use crate::sys::net::netc::IPV6_JOIN_GROUP as IPV6_ADD_MEMBERSHIP;
         use crate::sys::net::netc::IPV6_LEAVE_GROUP as IPV6_DROP_MEMBERSHIP;
-    } else {
+    }
+    _ => {
         use crate::sys::net::netc::IPV6_ADD_MEMBERSHIP;
         use crate::sys::net::netc::IPV6_DROP_MEMBERSHIP;
     }
 }
 
-cfg_if::cfg_if! {
-    if #[cfg(any(
+cfg_match! {
+    cfg(any(
         target_os = "linux", target_os = "android",
         target_os = "hurd",
         target_os = "dragonfly", target_os = "freebsd",
         target_os = "openbsd", target_os = "netbsd",
-        target_os = "haiku", target_os = "nto"))] {
+        target_os = "haiku", target_os = "nto")
+    ) => {
         use libc::MSG_NOSIGNAL;
-    } else {
+    }
+    _ => {
         const MSG_NOSIGNAL: c_int = 0x0;
     }
 }
 
-cfg_if::cfg_if! {
-    if #[cfg(any(
+cfg_match! {
+    cfg(any(
         target_os = "dragonfly", target_os = "freebsd",
         target_os = "openbsd", target_os = "netbsd",
         target_os = "solaris", target_os = "illumos",
-        target_os = "nto"))] {
+        target_os = "nto")) => {
         use crate::ffi::c_uchar;
         type IpV4MultiCastType = c_uchar;
-    } else {
+    }
+    _ => {
         type IpV4MultiCastType = c_int;
     }
 }
diff --git a/library/std/src/sys_common/once/mod.rs b/library/std/src/sys_common/once/mod.rs
index ec57568c54c4f..8702ba6c876ef 100644
--- a/library/std/src/sys_common/once/mod.rs
+++ b/library/std/src/sys_common/once/mod.rs
@@ -7,8 +7,8 @@
 // This also gives us the opportunity to optimize the implementation a bit which
 // should help the fast path on call sites.
 
-cfg_if::cfg_if! {
-    if #[cfg(any(
+cfg_match! {
+    cfg(any(
         target_os = "linux",
         target_os = "android",
         all(target_arch = "wasm32", target_feature = "atomics"),
@@ -17,19 +17,21 @@ cfg_if::cfg_if! {
         target_os = "dragonfly",
         target_os = "fuchsia",
         target_os = "hermit",
-    ))] {
+    )) => {
         mod futex;
         pub use futex::{Once, OnceState};
-    } else if #[cfg(any(
+    }
+    cfg(any(
         windows,
         target_family = "unix",
         all(target_vendor = "fortanix", target_env = "sgx"),
         target_os = "solid_asp3",
         target_os = "xous",
-    ))] {
+    )) => {
         mod queue;
         pub use queue::{Once, OnceState};
-    } else {
+    }
+    _ => {
         pub use crate::sys::once::{Once, OnceState};
     }
 }
diff --git a/library/std/src/sys_common/thread_parking/mod.rs b/library/std/src/sys_common/thread_parking/mod.rs
index c4d3f9ea2f427..ea3c4cfbab2cc 100644
--- a/library/std/src/sys_common/thread_parking/mod.rs
+++ b/library/std/src/sys_common/thread_parking/mod.rs
@@ -1,5 +1,5 @@
-cfg_if::cfg_if! {
-    if #[cfg(any(
+cfg_match! {
+    cfg(any(
         target_os = "linux",
         target_os = "android",
         all(target_arch = "wasm32", target_feature = "atomics"),
@@ -8,17 +8,19 @@ cfg_if::cfg_if! {
         target_os = "dragonfly",
         target_os = "fuchsia",
         target_os = "hermit",
-    ))] {
+    )) => {
         mod futex;
         pub use futex::Parker;
-    } else if #[cfg(any(
+    }
+    cfg(any(
         target_os = "netbsd",
         all(target_vendor = "fortanix", target_env = "sgx"),
         target_os = "solid_asp3",
-    ))] {
+    )) => {
         mod id;
         pub use id::Parker;
-    } else {
+    }
+    _ => {
         pub use crate::sys::thread_parking::Parker;
     }
 }
diff --git a/library/unwind/Cargo.toml b/library/unwind/Cargo.toml
index b7418d1189c77..3157e525ee5c3 100644
--- a/library/unwind/Cargo.toml
+++ b/library/unwind/Cargo.toml
@@ -17,7 +17,6 @@ doc = false
 core = { path = "../core" }
 libc = { version = "0.2.140", features = ['rustc-dep-of-std'], default-features = false }
 compiler_builtins = "0.1.0"
-cfg-if = "1.0"
 
 [target.'cfg(target_os = "xous")'.dependencies]
 unwinding = { version = "0.2.1", features = ['rustc-dep-of-std', 'unwinder', 'fde-custom'], default-features = false }
diff --git a/library/unwind/src/lib.rs b/library/unwind/src/lib.rs
index f5988a4df1364..a582b8738eb1f 100644
--- a/library/unwind/src/lib.rs
+++ b/library/unwind/src/lib.rs
@@ -1,5 +1,6 @@
 #![no_std]
 #![unstable(feature = "panic_unwind", issue = "32837")]
+#![feature(cfg_match)]
 #![feature(link_cfg)]
 #![feature(staged_api)]
 #![feature(c_unwind)]
@@ -8,28 +9,32 @@
 #![cfg_attr(not(target_env = "msvc"), feature(libc))]
 #![allow(internal_features)]
 
-cfg_if::cfg_if! {
-    if #[cfg(target_env = "msvc")] {
+cfg_match! {
+    cfg(target_env = "msvc") => {
         // Windows MSVC no extra unwinder support needed
-    } else if #[cfg(any(
+    }
+    cfg(any(
         target_os = "l4re",
         target_os = "none",
         target_os = "espidf",
-    ))] {
+    )) => {
         // These "unix" family members do not have unwinder.
-    } else if #[cfg(any(
+    }
+    cfg(any(
         unix,
         windows,
         target_os = "psp",
         target_os = "solid_asp3",
         all(target_vendor = "fortanix", target_env = "sgx"),
-    ))] {
+    )) => {
         mod libunwind;
         pub use libunwind::*;
-    } else if #[cfg(target_os = "xous")] {
+    }
+    cfg(target_os = "xous") => {
         mod unwinding;
         pub use unwinding::*;
-    } else {
+    }
+    _ => {
         // no unwinder on the system!
         // - wasm32 (not emscripten, which is "unix" family)
         // - os=none ("bare metal" targets)
@@ -42,17 +47,20 @@ cfg_if::cfg_if! {
 }
 
 #[cfg(target_env = "musl")]
-cfg_if::cfg_if! {
-    if #[cfg(all(feature = "llvm-libunwind", feature = "system-llvm-libunwind"))] {
+cfg_match! {
+    cfg(all(feature = "llvm-libunwind", feature = "system-llvm-libunwind")) => {
         compile_error!("`llvm-libunwind` and `system-llvm-libunwind` cannot be enabled at the same time");
-    } else if #[cfg(feature = "llvm-libunwind")] {
+    }
+    cfg(feature = "llvm-libunwind") => {
         #[link(name = "unwind", kind = "static", modifiers = "-bundle")]
         extern "C" {}
-    } else if #[cfg(feature = "system-llvm-libunwind")] {
+    }
+    cfg(feature = "system-llvm-libunwind") => {
         #[link(name = "unwind", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
         #[link(name = "unwind", cfg(not(target_feature = "crt-static")))]
         extern "C" {}
-    } else {
+    }
+    _ => {
         #[link(name = "unwind", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
         #[link(name = "gcc_s", cfg(not(target_feature = "crt-static")))]
         extern "C" {}
@@ -62,13 +70,15 @@ cfg_if::cfg_if! {
 // This is the same as musl except that we default to using the system libunwind
 // instead of libgcc.
 #[cfg(target_env = "ohos")]
-cfg_if::cfg_if! {
-    if #[cfg(all(feature = "llvm-libunwind", feature = "system-llvm-libunwind"))] {
+cfg_match! {
+    cfg(all(feature = "llvm-libunwind", feature = "system-llvm-libunwind")) => {
         compile_error!("`llvm-libunwind` and `system-llvm-libunwind` cannot be enabled at the same time");
-    } else if #[cfg(feature = "llvm-libunwind")] {
+    }
+    cfg(feature = "llvm-libunwind") => {
         #[link(name = "unwind", kind = "static", modifiers = "-bundle")]
         extern "C" {}
-    } else {
+    }
+    _ => {
         #[link(name = "unwind", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
         #[link(name = "unwind", cfg(not(target_feature = "crt-static")))]
         extern "C" {}
@@ -76,10 +86,11 @@ cfg_if::cfg_if! {
 }
 
 #[cfg(target_os = "android")]
-cfg_if::cfg_if! {
-    if #[cfg(feature = "llvm-libunwind")] {
+cfg_match! {
+    cfg(feature = "llvm-libunwind") => {
         compile_error!("`llvm-libunwind` is not supported for Android targets");
-    } else {
+    }
+    _ => {
         #[link(name = "unwind", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
         #[link(name = "unwind", cfg(not(target_feature = "crt-static")))]
         extern "C" {}
diff --git a/library/unwind/src/libunwind.rs b/library/unwind/src/libunwind.rs
index 1b5f6f9dde36c..3cf4e7af0c606 100644
--- a/library/unwind/src/libunwind.rs
+++ b/library/unwind/src/libunwind.rs
@@ -122,8 +122,8 @@ extern "C" {
     pub fn _Unwind_GetDataRelBase(ctx: *mut _Unwind_Context) -> _Unwind_Ptr;
 }
 
-cfg_if::cfg_if! {
-if #[cfg(any(target_os = "ios", target_os = "tvos", target_os = "watchos", target_os = "netbsd", not(target_arch = "arm")))] {
+cfg_match! {
+cfg(any(target_os = "ios", target_os = "tvos", target_os = "watchos", target_os = "netbsd", not(target_arch = "arm"))) => {
     // Not ARM EHABI
     #[repr(C)]
     #[derive(Copy, Clone, PartialEq)]
@@ -149,8 +149,8 @@ if #[cfg(any(target_os = "ios", target_os = "tvos", target_os = "watchos", targe
                                  -> _Unwind_Word;
         pub fn _Unwind_FindEnclosingFunction(pc: *mut c_void) -> *mut c_void;
     }
-
-} else {
+}
+_ => {
     // ARM EHABI
     #[repr(C)]
     #[derive(Copy, Clone, PartialEq)]
@@ -257,8 +257,8 @@ if #[cfg(any(target_os = "ios", target_os = "tvos", target_os = "watchos", targe
 }
 } // cfg_if!
 
-cfg_if::cfg_if! {
-if #[cfg(not(all(target_os = "ios", target_arch = "arm")))] {
+cfg_match! {
+cfg(not(all(target_os = "ios", target_arch = "arm"))) => {
     // Not 32-bit iOS
     #[cfg_attr(
         all(feature = "llvm-libunwind", any(target_os = "fuchsia", target_os = "linux", target_os = "xous")),
@@ -276,7 +276,8 @@ if #[cfg(not(all(target_os = "ios", target_arch = "arm")))] {
                                  trace_argument: *mut c_void)
                                  -> _Unwind_Reason_Code;
     }
-} else {
+}
+_ => {
     // 32-bit iOS uses SjLj and does not provide _Unwind_Backtrace()
     extern "C-unwind" {
         pub fn _Unwind_SjLj_RaiseException(e: *mut _Unwind_Exception) -> _Unwind_Reason_Code;
@@ -286,8 +287,8 @@ if #[cfg(not(all(target_os = "ios", target_arch = "arm")))] {
 }
 } // cfg_if!
 
-cfg_if::cfg_if! {
-if #[cfg(all(windows, any(target_arch = "aarch64", target_arch = "x86_64"), target_env = "gnu"))] {
+cfg_match! {
+cfg(all(windows, any(target_arch = "aarch64", target_arch = "x86_64"), target_env = "gnu")) => {
     // We declare these as opaque types. This is fine since you just need to
     // pass them to _GCC_specific_handler and forget about them.
     pub enum EXCEPTION_RECORD {}