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-rw-r--r--src/bootstrap/lib.rs2
-rw-r--r--src/test/run-make-fulldeps/alloc-no-rc/Makefile4
-rw-r--r--src/test/run-make-fulldeps/alloc-no-sync/Makefile4
3 files changed, 10 insertions, 0 deletions
diff --git a/src/bootstrap/lib.rs b/src/bootstrap/lib.rs
index dcfa92d1004..944c4fa811a 100644
--- a/src/bootstrap/lib.rs
+++ b/src/bootstrap/lib.rs
@@ -197,6 +197,8 @@ const EXTRA_CHECK_CFGS: &[(Option<Mode>, &'static str, Option<&[&'static str]>)]
     (Some(Mode::Std), "stdarch_intel_sde", None),
     (Some(Mode::Std), "no_fp_fmt_parse", None),
     (Some(Mode::Std), "no_global_oom_handling", None),
+    (Some(Mode::Std), "no_rc", None),
+    (Some(Mode::Std), "no_sync", None),
     (Some(Mode::Std), "freebsd12", None),
     (Some(Mode::Std), "backtrace_in_libstd", None),
     /* Extra values not defined in the built-in targets yet, but used in std */
diff --git a/src/test/run-make-fulldeps/alloc-no-rc/Makefile b/src/test/run-make-fulldeps/alloc-no-rc/Makefile
new file mode 100644
index 00000000000..5f7ae70fa02
--- /dev/null
+++ b/src/test/run-make-fulldeps/alloc-no-rc/Makefile
@@ -0,0 +1,4 @@
+include ../tools.mk
+
+all:
+	$(RUSTC) --edition=2021 -Dwarnings --crate-type=rlib ../../../../library/alloc/src/lib.rs --cfg no_rc
diff --git a/src/test/run-make-fulldeps/alloc-no-sync/Makefile b/src/test/run-make-fulldeps/alloc-no-sync/Makefile
new file mode 100644
index 00000000000..6a258a2ddfd
--- /dev/null
+++ b/src/test/run-make-fulldeps/alloc-no-sync/Makefile
@@ -0,0 +1,4 @@
+include ../tools.mk
+
+all:
+	$(RUSTC) --edition=2021 -Dwarnings --crate-type=rlib ../../../../library/alloc/src/lib.rs --cfg no_sync