From 99605a0389e42a711f4e87272faa5f3c7f1c3a87 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A9my=20Rakic?= <remy.rakic+github@gmail.com>
Date: Wed, 21 Jun 2023 15:46:50 +0000
Subject: [PATCH] add whether `LinkerFlavor` uses `lld`

---
 compiler/rustc_target/src/spec/mod.rs | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/compiler/rustc_target/src/spec/mod.rs b/compiler/rustc_target/src/spec/mod.rs
index 0a42c4c2544..876c3818e6a 100644
--- a/compiler/rustc_target/src/spec/mod.rs
+++ b/compiler/rustc_target/src/spec/mod.rs
@@ -349,6 +349,24 @@ impl LinkerFlavor {
     pub fn is_gnu(self) -> bool {
         matches!(self, LinkerFlavor::Gnu(..))
     }
+
+    /// Returns whether the flavor uses the `lld` linker.
+    pub fn uses_lld(self) -> bool {
+        // Exhaustive match in case new flavors are added in the future.
+        match self {
+            LinkerFlavor::Gnu(_, Lld::Yes)
+            | LinkerFlavor::Darwin(_, Lld::Yes)
+            | LinkerFlavor::WasmLld(..)
+            | LinkerFlavor::EmCc
+            | LinkerFlavor::Msvc(Lld::Yes) => true,
+            LinkerFlavor::Gnu(..)
+            | LinkerFlavor::Darwin(..)
+            | LinkerFlavor::Msvc(_)
+            | LinkerFlavor::Unix(_)
+            | LinkerFlavor::Bpf
+            | LinkerFlavor::Ptx => false,
+        }
+    }
 }
 
 macro_rules! linker_flavor_cli_impls {