diff --git a/library/std/src/process.rs b/library/std/src/process.rs
index c1da395bfc5..62ce2cb33dc 100644
--- a/library/std/src/process.rs
+++ b/library/std/src/process.rs
@@ -2164,18 +2164,11 @@ pub fn id() -> u32 {
 /// to provide similar functionality.
 #[cfg_attr(not(test), lang = "termination")]
 #[stable(feature = "termination_trait_lib", since = "1.61.0")]
-#[rustc_on_unimplemented(
-    on(
-        all(not(bootstrap), cause = "MainFunctionType"),
-        message = "`main` has invalid return type `{Self}`",
-        label = "`main` can only return types that implement `{Termination}`"
-    ),
-    on(
-        bootstrap,
-        message = "`main` has invalid return type `{Self}`",
-        label = "`main` can only return types that implement `{Termination}`"
-    )
-)]
+#[rustc_on_unimplemented(on(
+    cause = "MainFunctionType",
+    message = "`main` has invalid return type `{Self}`",
+    label = "`main` can only return types that implement `{Termination}`"
+))]
 pub trait Termination {
     /// Is called to get the representation of the value as status code.
     /// This status code is returned to the operating system.
diff --git a/library/std/src/sys/unix/mod.rs b/library/std/src/sys/unix/mod.rs
index 83a43b6ee26..233e4a26bdc 100644
--- a/library/std/src/sys/unix/mod.rs
+++ b/library/std/src/sys/unix/mod.rs
@@ -184,12 +184,7 @@ pub unsafe fn init(argc: isize, argv: *const *const u8, sigpipe: u8) {
                 sigpipe::SIG_DFL => (true, Some(libc::SIG_DFL)),
                 _ => unreachable!(),
             };
-            // The bootstrap compiler doesn't know about sigpipe::DEFAULT, and always passes in
-            // SIG_IGN. This causes some tests to fail because they expect SIGPIPE to be reset to
-            // default on process spawning (which doesn't happen if #[unix_sigpipe] is specified).
-            // Since we can't differentiate between the cases here, treat SIG_IGN as DEFAULT
-            // unconditionally.
-            if sigpipe_attr_specified && !(cfg!(bootstrap) && sigpipe == sigpipe::SIG_IGN) {
+            if sigpipe_attr_specified {
                 UNIX_SIGPIPE_ATTR_SPECIFIED.store(true, crate::sync::atomic::Ordering::Relaxed);
             }
             if let Some(handler) = handler {
diff --git a/library/std/tests/run-time-detect.rs b/library/std/tests/run-time-detect.rs
index 02c076f1bb5..7fbfe3daaa8 100644
--- a/library/std/tests/run-time-detect.rs
+++ b/library/std/tests/run-time-detect.rs
@@ -3,7 +3,6 @@
 #![cfg_attr(
     any(
         all(target_arch = "arm", any(target_os = "linux", target_os = "android")),
-        all(bootstrap, target_arch = "aarch64", any(target_os = "linux", target_os = "android")),
         all(target_arch = "powerpc", target_os = "linux"),
         all(target_arch = "powerpc64", target_os = "linux"),
     ),
diff --git a/src/bootstrap/compile.rs b/src/bootstrap/compile.rs
index 427e1a3863e..ae5dfdea19f 100644
--- a/src/bootstrap/compile.rs
+++ b/src/bootstrap/compile.rs
@@ -691,26 +691,23 @@ impl Step for Rustc {
             ));
         }
 
-        // cfg(bootstrap): remove if condition once the bootstrap compiler supports dylib LTO
-        if compiler.stage != 0 {
-            match builder.config.rust_lto {
-                RustcLto::Thin | RustcLto::Fat => {
-                    // Since using LTO for optimizing dylibs is currently experimental,
-                    // we need to pass -Zdylib-lto.
-                    cargo.rustflag("-Zdylib-lto");
-                    // Cargo by default passes `-Cembed-bitcode=no` and doesn't pass `-Clto` when
-                    // compiling dylibs (and their dependencies), even when LTO is enabled for the
-                    // crate. Therefore, we need to override `-Clto` and `-Cembed-bitcode` here.
-                    let lto_type = match builder.config.rust_lto {
-                        RustcLto::Thin => "thin",
-                        RustcLto::Fat => "fat",
-                        _ => unreachable!(),
-                    };
-                    cargo.rustflag(&format!("-Clto={}", lto_type));
-                    cargo.rustflag("-Cembed-bitcode=yes");
-                }
-                RustcLto::ThinLocal => { /* Do nothing, this is the default */ }
+        match builder.config.rust_lto {
+            RustcLto::Thin | RustcLto::Fat => {
+                // Since using LTO for optimizing dylibs is currently experimental,
+                // we need to pass -Zdylib-lto.
+                cargo.rustflag("-Zdylib-lto");
+                // Cargo by default passes `-Cembed-bitcode=no` and doesn't pass `-Clto` when
+                // compiling dylibs (and their dependencies), even when LTO is enabled for the
+                // crate. Therefore, we need to override `-Clto` and `-Cembed-bitcode` here.
+                let lto_type = match builder.config.rust_lto {
+                    RustcLto::Thin => "thin",
+                    RustcLto::Fat => "fat",
+                    _ => unreachable!(),
+                };
+                cargo.rustflag(&format!("-Clto={}", lto_type));
+                cargo.rustflag("-Cembed-bitcode=yes");
             }
+            RustcLto::ThinLocal => { /* Do nothing, this is the default */ }
         }
 
         builder.info(&format!(