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-rw-r--r--compiler/rustc_session/src/config/cfg.rs4
1 files changed, 4 insertions, 0 deletions
diff --git a/compiler/rustc_session/src/config/cfg.rs b/compiler/rustc_session/src/config/cfg.rs
index 231ca434962..cbfe9e0da6a 100644
--- a/compiler/rustc_session/src/config/cfg.rs
+++ b/compiler/rustc_session/src/config/cfg.rs
@@ -142,6 +142,10 @@ pub(crate) fn disallow_cfgs(sess: &Session, user_cfgs: &Cfg) {
             | (sym::target_has_atomic, Some(_))
             | (sym::target_has_atomic_equal_alignment, Some(_))
             | (sym::target_has_atomic_load_store, Some(_))
+            | (sym::target_has_reliable_f16, None | Some(_))
+            | (sym::target_has_reliable_f16_math, None | Some(_))
+            | (sym::target_has_reliable_f128, None | Some(_))
+            | (sym::target_has_reliable_f128_math, None | Some(_))
             | (sym::target_thread_local, None) => disallow(cfg, "--target"),
             (sym::fmt_debug, None | Some(_)) => disallow(cfg, "-Z fmt-debug"),
             (sym::emscripten_wasm_eh, None | Some(_)) => disallow(cfg, "-Z emscripten_wasm_eh"),