Rollup merge of #92528 - tmiasko:combine-commutative, r=michaelwoerister

[rust.git] / compiler / rustc_session / src / config.rs

diff --git a/compiler/rustc_session/src/config.rs b/compiler/rustc_session/src/config.rs
index 92ad0723f4879f31690307761dffb600296f75ce..d2d5b06ad67b622553d6930cad8eb46e652f4c86 100644 (file)
--- a/compiler/rustc_session/src/config.rs
+++ b/compiler/rustc_session/src/config.rs
@@ -12,7 +12,7 @@
 use rustc_data_structures::impl_stable_hash_via_hash;
 
 use rustc_target::abi::{Align, TargetDataLayout};
-use rustc_target::spec::{SplitDebuginfo, Target, TargetTriple, TargetWarnings};
+use rustc_target::spec::{LinkerFlavor, SplitDebuginfo, Target, TargetTriple, TargetWarnings};
 
 use rustc_serialize::json;
 
@@ -1188,7 +1188,7 @@ pub fn rustc_short_optgroups() -> Vec<RustcOptGroup> {
             "Compiler information to print on stdout",
             "[crate-name|file-names|sysroot|target-libdir|cfg|target-list|\
              target-cpus|target-features|relocation-models|code-models|\
-             tls-models|target-spec-json|native-static-libs|stack-protector-strategies\
+             tls-models|target-spec-json|native-static-libs|stack-protector-strategies|\
              link-args]",
         ),
         opt::flagmulti_s("g", "", "Equivalent to -C debuginfo=2"),
@@ -2237,6 +2237,16 @@ pub fn build_session_options(matches: &getopts::Matches) -> Options {
         }
     }
 
+    if cg.linker_flavor == Some(LinkerFlavor::L4Bender)
+        && !nightly_options::is_unstable_enabled(matches)
+    {
+        early_error(
+            error_format,
+            "`l4-bender` linker flavor is unstable, `-Z unstable-options` \
+             flag must also be passed to explicitly use it",
+        );
+    }
+
     let prints = collect_print_requests(&mut cg, &mut debugging_opts, matches, error_format);
 
     let cg = cg;