diff --git a/compiler/rustc_resolve/src/def_collector.rs b/compiler/rustc_resolve/src/def_collector.rs
index fb6e55f2b7bdf..60789c083133f 100644
--- a/compiler/rustc_resolve/src/def_collector.rs
+++ b/compiler/rustc_resolve/src/def_collector.rs
@@ -343,6 +343,9 @@ impl<'a, 'b, 'tcx> visit::Visitor<'a> for DefCollector<'a, 'b, 'tcx> {
                 self.create_def(expr.id, kw::Empty, DefKind::Closure, expr.span)
             }
             ExprKind::ConstBlock(ref constant) => {
+                for attr in &expr.attrs {
+                    visit::walk_attribute(self, attr);
+                }
                 let def = self.create_def(
                     constant.id,
                     kw::Empty,
diff --git a/library/core/src/lib.rs b/library/core/src/lib.rs
index a533a7938f13b..94ad8fbd5df07 100644
--- a/library/core/src/lib.rs
+++ b/library/core/src/lib.rs
@@ -209,7 +209,6 @@
 #![feature(cfg_sanitize)]
 #![feature(cfg_target_has_atomic)]
 #![feature(cfg_target_has_atomic_equal_alignment)]
-#![feature(const_closures)]
 #![feature(const_fn_floating_point_arithmetic)]
 #![feature(const_for)]
 #![feature(const_mut_refs)]
diff --git a/src/tools/run-make-support/src/rustc.rs b/src/tools/run-make-support/src/rustc.rs
index 331e1a5ab8b32..a377dad99d6a4 100644
--- a/src/tools/run-make-support/src/rustc.rs
+++ b/src/tools/run-make-support/src/rustc.rs
@@ -73,6 +73,12 @@ impl Rustc {
         self
     }
 
+    /// Incorporate a hashed string to mangled symbols.
+    pub fn metadata(&mut self, meta: &str) -> &mut Self {
+        self.cmd.arg(format!("-Cmetadata={meta}"));
+        self
+    }
+
     /// Add a suffix in each output filename.
     pub fn extra_filename(&mut self, suffix: &str) -> &mut Self {
         self.cmd.arg(format!("-Cextra-filename={suffix}"));
@@ -230,6 +236,12 @@ impl Rustc {
         self
     }
 
+    /// Add multiple extra arguments to the linker invocation, via `-Clink-args`.
+    pub fn link_args(&mut self, link_args: &str) -> &mut Self {
+        self.cmd.arg(format!("-Clink-args={link_args}"));
+        self
+    }
+
     /// Specify a stdin input
     pub fn stdin<I: AsRef<[u8]>>(&mut self, input: I) -> &mut Self {
         self.cmd.set_stdin(input.as_ref().to_vec().into_boxed_slice());
@@ -248,4 +260,10 @@ impl Rustc {
         self.cmd.arg(format!("-Clinker={linker}"));
         self
     }
+
+    /// Specify the linker flavor
+    pub fn linker_flavor(&mut self, linker_flavor: &str) -> &mut Self {
+        self.cmd.arg(format!("-Clinker-flavor={linker_flavor}"));
+        self
+    }
 }
diff --git a/src/tools/tidy/src/allowed_run_make_makefiles.txt b/src/tools/tidy/src/allowed_run_make_makefiles.txt
index 4e64181c6f528..f32413540498d 100644
--- a/src/tools/tidy/src/allowed_run_make_makefiles.txt
+++ b/src/tools/tidy/src/allowed_run_make_makefiles.txt
@@ -13,7 +13,6 @@ run-make/cdylib-fewer-symbols/Makefile
 run-make/compiler-lookup-paths-2/Makefile
 run-make/compiler-lookup-paths/Makefile
 run-make/compiler-rt-works-on-mingw/Makefile
-run-make/compressed-debuginfo/Makefile
 run-make/crate-hash-rustc-version/Makefile
 run-make/crate-name-priority/Makefile
 run-make/cross-lang-lto-clang/Makefile
@@ -21,7 +20,6 @@ run-make/cross-lang-lto-pgo-smoketest/Makefile
 run-make/cross-lang-lto-upstream-rlibs/Makefile
 run-make/cross-lang-lto/Makefile
 run-make/debug-assertions/Makefile
-run-make/debugger-visualizer-dep-info/Makefile
 run-make/dep-info-doesnt-run-much/Makefile
 run-make/dep-info-spaces/Makefile
 run-make/dep-info/Makefile
@@ -38,7 +36,6 @@ run-make/export-executable-symbols/Makefile
 run-make/extern-diff-internal-name/Makefile
 run-make/extern-flag-disambiguates/Makefile
 run-make/extern-flag-pathless/Makefile
-run-make/extern-flag-rename-transitive/Makefile
 run-make/extern-fn-explicit-align/Makefile
 run-make/extern-fn-generic/Makefile
 run-make/extern-fn-mangle/Makefile
@@ -49,10 +46,8 @@ run-make/extern-fn-with-packed-struct/Makefile
 run-make/extern-fn-with-union/Makefile
 run-make/extern-multiple-copies/Makefile
 run-make/extern-multiple-copies2/Makefile
-run-make/extern-overrides-distribution/Makefile
 run-make/extra-filename-with-temp-outputs/Makefile
 run-make/fmt-write-bloat/Makefile
-run-make/forced-unwind-terminate-pof/Makefile
 run-make/foreign-double-unwind/Makefile
 run-make/foreign-exceptions/Makefile
 run-make/foreign-rust-exceptions/Makefile
@@ -96,7 +91,6 @@ run-make/libtest-json/Makefile
 run-make/libtest-junit/Makefile
 run-make/libtest-padding/Makefile
 run-make/libtest-thread-limit/Makefile
-run-make/link-args-order/Makefile
 run-make/link-cfg/Makefile
 run-make/link-framework/Makefile
 run-make/link-path-order/Makefile
@@ -105,19 +99,16 @@ run-make/llvm-ident/Makefile
 run-make/long-linker-command-lines-cmd-exe/Makefile
 run-make/long-linker-command-lines/Makefile
 run-make/longjmp-across-rust/Makefile
-run-make/ls-metadata/Makefile
 run-make/lto-dylib-dep/Makefile
 run-make/lto-empty/Makefile
 run-make/lto-linkage-used-attr/Makefile
 run-make/lto-no-link-whole-rlib/Makefile
-run-make/lto-readonly-lib/Makefile
 run-make/lto-smoke-c/Makefile
 run-make/macos-deployment-target/Makefile
 run-make/macos-fat-archive/Makefile
 run-make/manual-link/Makefile
 run-make/many-crates-but-no-match/Makefile
 run-make/metadata-dep-info/Makefile
-run-make/metadata-flag-frobs-symbols/Makefile
 run-make/min-global-align/Makefile
 run-make/mingw-export-call-convention/Makefile
 run-make/mismatching-target-triples/Makefile
diff --git a/tests/run-make/compressed-debuginfo/Makefile b/tests/run-make/compressed-debuginfo/Makefile
deleted file mode 100644
index d2f24dde00d7b..0000000000000
--- a/tests/run-make/compressed-debuginfo/Makefile
+++ /dev/null
@@ -1,14 +0,0 @@
-# ignore-cross-compile
-include ../tools.mk
-
-# only-linux
-#
-# This tests debuginfo-compression.
-
-all: zlib zstandard
-
-zlib:
-	test "`$(RUSTC) --crate-name=foo --crate-type=lib --emit=obj -C debuginfo=full -Z debuginfo-compression=zlib foo.rs 2>&1 | sed 's/.*unknown.*zlib.*/missing/' | head -n 1`" = missing || readelf -t $(TMPDIR)/foo.o | grep -q ZLIB
-
-zstandard:
-	test "`$(RUSTC) --crate-name=foo --crate-type=lib --emit=obj -C debuginfo=full -Z debuginfo-compression=zstd foo.rs 2>&1 | sed 's/.*unknown.*zstd.*/missing/' | head -n 1`" = missing || readelf -t $(TMPDIR)/foo.o | grep -q ZST
diff --git a/tests/run-make/compressed-debuginfo/rmake.rs b/tests/run-make/compressed-debuginfo/rmake.rs
new file mode 100644
index 0000000000000..9c6d50ab243cd
--- /dev/null
+++ b/tests/run-make/compressed-debuginfo/rmake.rs
@@ -0,0 +1,36 @@
+// Checks the `debuginfo-compression` option.
+
+//@ only-linux
+//@ ignore-cross-compile
+
+// FIXME: This test isn't comprehensive and isn't covering all possible combinations.
+
+use run_make_support::{assert_contains, cmd, run_in_tmpdir, rustc};
+
+fn check_compression(compression: &str, to_find: &str) {
+    run_in_tmpdir(|| {
+        let out = rustc()
+            .crate_name("foo")
+            .crate_type("lib")
+            .emit("obj")
+            .arg("-Cdebuginfo=full")
+            .arg(&format!("-Zdebuginfo-compression={compression}"))
+            .input("foo.rs")
+            .run();
+        let stderr = out.stderr_utf8();
+        if stderr.is_empty() {
+            // FIXME: `readelf` might need to be replaced with `llvm-readelf`.
+            cmd("readelf").arg("-t").arg("foo.o").run().assert_stdout_contains(to_find);
+        } else {
+            assert_contains(
+                &stderr,
+                &format!("unknown debuginfo compression algorithm {compression}"),
+            );
+        }
+    });
+}
+
+fn main() {
+    check_compression("zlib", "ZLIB");
+    check_compression("zstd", "ZSTD");
+}
diff --git a/tests/run-make/debugger-visualizer-dep-info/Makefile b/tests/run-make/debugger-visualizer-dep-info/Makefile
deleted file mode 100644
index 0877998a74fe7..0000000000000
--- a/tests/run-make/debugger-visualizer-dep-info/Makefile
+++ /dev/null
@@ -1,9 +0,0 @@
-include ../tools.mk
-
-# This test makes sure that files referenced via #[debugger_visualizer] are
-# included in `--emit dep-info` output.
-
-all:
-	$(RUSTC) --emit dep-info main.rs
-	$(CGREP) "foo.py" < $(TMPDIR)/main.d
-	$(CGREP) "my_visualizers/bar.natvis" < $(TMPDIR)/main.d
diff --git a/tests/run-make/debugger-visualizer-dep-info/rmake.rs b/tests/run-make/debugger-visualizer-dep-info/rmake.rs
new file mode 100644
index 0000000000000..65ffb2373e7c4
--- /dev/null
+++ b/tests/run-make/debugger-visualizer-dep-info/rmake.rs
@@ -0,0 +1,11 @@
+// This test checks that files referenced via #[debugger_visualizer] are
+// included in `--emit dep-info` output.
+// See https://github.com/rust-lang/rust/pull/111641
+
+use run_make_support::{invalid_utf8_contains, rustc};
+
+fn main() {
+    rustc().emit("dep-info").input("main.rs").run();
+    invalid_utf8_contains("main.d", "foo.py");
+    invalid_utf8_contains("main.d", "my_visualizers/bar.natvis");
+}
diff --git a/tests/run-make/extern-flag-rename-transitive/Makefile b/tests/run-make/extern-flag-rename-transitive/Makefile
deleted file mode 100644
index d16a8e20868ef..0000000000000
--- a/tests/run-make/extern-flag-rename-transitive/Makefile
+++ /dev/null
@@ -1,7 +0,0 @@
-include ../tools.mk
-
-all:
-	$(RUSTC) foo.rs
-	$(RUSTC) bar.rs
-	$(RUSTC) baz.rs --extern a=$(TMPDIR)/libfoo.rlib
-
diff --git a/tests/run-make/extern-flag-rename-transitive/rmake.rs b/tests/run-make/extern-flag-rename-transitive/rmake.rs
new file mode 100644
index 0000000000000..0090d487f03d6
--- /dev/null
+++ b/tests/run-make/extern-flag-rename-transitive/rmake.rs
@@ -0,0 +1,14 @@
+// In this test, baz.rs is looking for an extern crate "a" which
+// does not exist, and can only run through the --extern rustc flag
+// defining that the "a" crate is in fact just "foo". This test
+// checks that the --extern flag takes precedence over the extern
+// crate statement in the code.
+// See https://github.com/rust-lang/rust/pull/52723
+
+use run_make_support::{rust_lib_name, rustc};
+
+fn main() {
+    rustc().input("foo.rs").run();
+    rustc().input("bar.rs").run();
+    rustc().input("baz.rs").extern_("a", rust_lib_name("foo")).run();
+}
diff --git a/tests/run-make/extern-overrides-distribution/Makefile b/tests/run-make/extern-overrides-distribution/Makefile
deleted file mode 100644
index bfd0dd6991ba7..0000000000000
--- a/tests/run-make/extern-overrides-distribution/Makefile
+++ /dev/null
@@ -1,6 +0,0 @@
-# ignore-cross-compile
-include ../tools.mk
-
-all:
-	$(RUSTC) libc.rs -Cmetadata=foo
-	$(RUSTC) main.rs --extern libc=$(TMPDIR)/liblibc.rlib
diff --git a/tests/run-make/extern-overrides-distribution/rmake.rs b/tests/run-make/extern-overrides-distribution/rmake.rs
new file mode 100644
index 0000000000000..bd2553d4134a4
--- /dev/null
+++ b/tests/run-make/extern-overrides-distribution/rmake.rs
@@ -0,0 +1,14 @@
+// The --extern flag should override any "crate_type" declarations in the
+// Rust files themselves. In this test, libc is compiled as "lib", but
+// main.rs will only run with an rlib, which checks if the --extern flag
+// is successfully overriding the default behaviour.
+// See https://github.com/rust-lang/rust/pull/21782
+
+//@ ignore-cross-compile
+
+use run_make_support::{rust_lib_name, rustc};
+
+fn main() {
+    rustc().input("libc.rs").metadata("foo").run();
+    rustc().input("main.rs").extern_("libc", rust_lib_name("libc")).run();
+}
diff --git a/tests/run-make/forced-unwind-terminate-pof/Makefile b/tests/run-make/forced-unwind-terminate-pof/Makefile
deleted file mode 100644
index 871621520b910..0000000000000
--- a/tests/run-make/forced-unwind-terminate-pof/Makefile
+++ /dev/null
@@ -1,9 +0,0 @@
-# ignore-cross-compile
-# only-linux
-include ../tools.mk
-
-all: foo
-	$(call RUN,foo) | $(CGREP) -v "cannot unwind"
-
-foo: foo.rs
-	$(RUSTC) $<
diff --git a/tests/run-make/forced-unwind-terminate-pof/rmake.rs b/tests/run-make/forced-unwind-terminate-pof/rmake.rs
new file mode 100644
index 0000000000000..320ddb172b6ec
--- /dev/null
+++ b/tests/run-make/forced-unwind-terminate-pof/rmake.rs
@@ -0,0 +1,16 @@
+// During a forced unwind, crossing the non-Plain Old Frame
+// would define the forced unwind as undefined behaviour, and
+// immediately abort the unwinding process. This test checks
+// that the forced unwinding takes precedence.
+// See https://github.com/rust-lang/rust/issues/101469
+
+//@ ignore-cross-compile
+//@ ignore-windows
+//Reason: pthread (POSIX threads) is not available on Windows
+
+use run_make_support::{run, rustc};
+
+fn main() {
+    rustc().input("foo.rs").run();
+    run("foo").assert_stdout_not_contains("cannot unwind");
+}
diff --git a/tests/run-make/link-args-order/Makefile b/tests/run-make/link-args-order/Makefile
deleted file mode 100644
index c562cc1b396fa..0000000000000
--- a/tests/run-make/link-args-order/Makefile
+++ /dev/null
@@ -1,10 +0,0 @@
-# ignore-msvc
-
-include ../tools.mk
-
-RUSTC_FLAGS = -C linker-flavor=ld -C link-arg=a -C link-args="b c" -C link-args="d e" -C link-arg=f
-RUSTC_FLAGS_PRE = -C linker-flavor=ld -Z pre-link-arg=a -Z pre-link-args="b c" -Z pre-link-args="d e" -Z pre-link-arg=f
-
-all:
-	$(RUSTC) $(RUSTC_FLAGS) empty.rs 2>&1 | $(CGREP) '"a" "b" "c" "d" "e" "f"'
-	$(RUSTC) $(RUSTC_FLAGS_PRE) empty.rs 2>&1 | $(CGREP) '"a" "b" "c" "d" "e" "f"'
diff --git a/tests/run-make/link-args-order/rmake.rs b/tests/run-make/link-args-order/rmake.rs
new file mode 100644
index 0000000000000..d238ad23f27c7
--- /dev/null
+++ b/tests/run-make/link-args-order/rmake.rs
@@ -0,0 +1,30 @@
+// Passing linker arguments to the compiler used to be lost or reordered in a messy way
+// as they were passed further to the linker. This was fixed in #70665, and this test
+// checks that linker arguments remain intact and in the order they were originally passed in.
+// See https://github.com/rust-lang/rust/pull/70665
+
+//@ ignore-msvc
+// Reason: the ld linker does not exist on Windows.
+
+use run_make_support::rustc;
+
+fn main() {
+    rustc()
+        .input("empty.rs")
+        .linker_flavor("ld")
+        .link_arg("a")
+        .link_args("b c")
+        .link_args("d e")
+        .link_arg("f")
+        .run_fail()
+        .assert_stderr_contains(r#""a" "b" "c" "d" "e" "f""#);
+    rustc()
+        .input("empty.rs")
+        .linker_flavor("ld")
+        .arg("-Zpre-link-arg=a")
+        .arg("-Zpre-link-args=b c")
+        .arg("-Zpre-link-args=d e")
+        .arg("-Zpre-link-arg=f")
+        .run_fail()
+        .assert_stderr_contains(r#""a" "b" "c" "d" "e" "f""#);
+}
diff --git a/tests/run-make/ls-metadata/Makefile b/tests/run-make/ls-metadata/Makefile
deleted file mode 100644
index f03569baef7f2..0000000000000
--- a/tests/run-make/ls-metadata/Makefile
+++ /dev/null
@@ -1,8 +0,0 @@
-# ignore-cross-compile
-include ../tools.mk
-
-all:
-	$(RUSTC) foo.rs
-	$(RUSTC) -Z ls=root $(TMPDIR)/foo
-	touch $(TMPDIR)/bar
-	$(RUSTC) -Z ls=root $(TMPDIR)/bar
diff --git a/tests/run-make/ls-metadata/rmake.rs b/tests/run-make/ls-metadata/rmake.rs
new file mode 100644
index 0000000000000..0e60f2c46787a
--- /dev/null
+++ b/tests/run-make/ls-metadata/rmake.rs
@@ -0,0 +1,17 @@
+// Passing invalid files to -Z ls (which lists the symbols
+// defined by a library crate) used to cause a segmentation fault.
+// As this was fixed in #11262, this test checks that no segfault
+// occurs when passing the invalid file `bar` to -Z ls.
+// See https://github.com/rust-lang/rust/issues/11259
+
+//@ ignore-cross-compile
+
+use run_make_support::fs_wrapper;
+use run_make_support::rustc;
+
+fn main() {
+    rustc().input("foo.rs").run();
+    rustc().arg("-Zls=root").input("foo").run();
+    fs_wrapper::create_file("bar");
+    rustc().arg("-Zls=root").input("bar").run();
+}
diff --git a/tests/run-make/lto-readonly-lib/Makefile b/tests/run-make/lto-readonly-lib/Makefile
deleted file mode 100644
index 11d944e3e3d4b..0000000000000
--- a/tests/run-make/lto-readonly-lib/Makefile
+++ /dev/null
@@ -1,13 +0,0 @@
-# ignore-cross-compile
-include ../tools.mk
-
-all:
-	$(RUSTC) lib.rs
-
-	# the compiler needs to copy and modify the rlib file when performing
-	# LTO, so we should ensure that it can cope with the original rlib
-	# being read-only.
-	chmod 444 $(TMPDIR)/*.rlib
-
-	$(RUSTC) main.rs -C lto
-	$(call RUN,main)
diff --git a/tests/run-make/lto-readonly-lib/rmake.rs b/tests/run-make/lto-readonly-lib/rmake.rs
new file mode 100644
index 0000000000000..9eb135addd9ec
--- /dev/null
+++ b/tests/run-make/lto-readonly-lib/rmake.rs
@@ -0,0 +1,19 @@
+// When the compiler is performing link time optimization, it will
+// need to copy the original rlib file, set the copy's permissions to read/write,
+// and modify that copy - even if the original
+// file is read-only. This test creates a read-only rlib, and checks that
+// compilation with LTO succeeds.
+// See https://github.com/rust-lang/rust/pull/17619
+
+//@ ignore-cross-compile
+
+use run_make_support::fs_wrapper;
+use run_make_support::{run, rust_lib_name, rustc, test_while_readonly};
+
+fn main() {
+    rustc().input("lib.rs").run();
+    test_while_readonly(rust_lib_name("lib"), || {
+        rustc().input("main.rs").arg("-Clto").run();
+        run("main");
+    });
+}
diff --git a/tests/run-make/metadata-flag-frobs-symbols/Makefile b/tests/run-make/metadata-flag-frobs-symbols/Makefile
deleted file mode 100644
index 53d7d0657695f..0000000000000
--- a/tests/run-make/metadata-flag-frobs-symbols/Makefile
+++ /dev/null
@@ -1,11 +0,0 @@
-# ignore-cross-compile
-include ../tools.mk
-
-all:
-	$(RUSTC) foo.rs -C metadata=a -C extra-filename=-a
-	$(RUSTC) foo.rs -C metadata=b -C extra-filename=-b
-	$(RUSTC) bar.rs \
-		--extern foo1=$(TMPDIR)/libfoo-a.rlib \
-		--extern foo2=$(TMPDIR)/libfoo-b.rlib \
-		--print link-args
-	$(call RUN,bar)
diff --git a/tests/run-make/metadata-flag-frobs-symbols/rmake.rs b/tests/run-make/metadata-flag-frobs-symbols/rmake.rs
new file mode 100644
index 0000000000000..938886957fb9a
--- /dev/null
+++ b/tests/run-make/metadata-flag-frobs-symbols/rmake.rs
@@ -0,0 +1,20 @@
+// In this test, foo.rs is compiled twice with different hashes tied to its
+// symbols thanks to the metadata flag. bar.rs then ensures that the memory locations
+// of foo's symbols are different even though they came from the same original source code.
+// This checks that the metadata flag is doing its job.
+// See https://github.com/rust-lang/rust/issues/14471
+
+//@ ignore-cross-compile
+
+use run_make_support::{run, rust_lib_name, rustc};
+
+fn main() {
+    rustc().input("foo.rs").metadata("a").extra_filename("-a").run();
+    rustc().input("foo.rs").metadata("b").extra_filename("-b").run();
+    rustc()
+        .input("bar.rs")
+        .extern_("foo1", rust_lib_name("foo-a"))
+        .extern_("foo2", rust_lib_name("foo-b"))
+        .run();
+    run("bar");
+}
diff --git a/tests/ui/lifetimes/tail-expr-lock-poisoning.rs b/tests/ui/lifetimes/tail-expr-lock-poisoning.rs
index 69b8f286d774f..cdfd35304b44e 100644
--- a/tests/ui/lifetimes/tail-expr-lock-poisoning.rs
+++ b/tests/ui/lifetimes/tail-expr-lock-poisoning.rs
@@ -3,6 +3,7 @@
 //@ [edition2024] compile-flags: -Zunstable-options
 //@ [edition2024] edition: 2024
 //@ run-pass
+//@ needs-unwind
 #![cfg_attr(edition2024, feature(shorter_tail_lifetimes))]
 
 use std::sync::Mutex;
diff --git a/tests/ui/resolve/path-attr-in-const-block.rs b/tests/ui/resolve/path-attr-in-const-block.rs
new file mode 100644
index 0000000000000..076511d26d6d3
--- /dev/null
+++ b/tests/ui/resolve/path-attr-in-const-block.rs
@@ -0,0 +1,9 @@
+// issue#126516
+// issue#126647
+
+fn main() {
+    const {
+        #![path = foo!()]
+        //~^ ERROR: cannot find macro `foo` in this scope
+    }
+}
diff --git a/tests/ui/resolve/path-attr-in-const-block.stderr b/tests/ui/resolve/path-attr-in-const-block.stderr
new file mode 100644
index 0000000000000..8f9e58157c809
--- /dev/null
+++ b/tests/ui/resolve/path-attr-in-const-block.stderr
@@ -0,0 +1,8 @@
+error: cannot find macro `foo` in this scope
+  --> $DIR/path-attr-in-const-block.rs:6:19
+   |
+LL |         #![path = foo!()]
+   |                   ^^^
+
+error: aborting due to 1 previous error
+