add default_lld_opt_in_targets method and modified test accordingly

Author: Shourya742

src/bootstrap/src/core/builder/tests.rs

@@ -1631,59 +1631,33 @@ mod snapshot {
     #[test]
     fn doc_core_no_std_target() {
         let ctx = TestCtx::new();
-        if host_target() == "x86_64-unknown-linux-gnu" {
-            insta::assert_snapshot!(
-                ctx.config("doc")
-                    .path("core")
-                    .override_target_no_std(&host_target())
-                    .render_steps(), @r"
-            [build] llvm <host>
-            [build] rustc 0 <host> -> rustc 1 <host>
-            [build] rustc 0 <host> -> LldWrapper 1 <host>
-            [build] rustdoc 0 <host>
-            [doc] std 1 <host> crates=[core]
-            ");
-        } else {
-            insta::assert_snapshot!(
-                ctx.config("doc")
-                    .path("core")
-                    .override_target_no_std(&host_target())
-                    .render_steps(), @r"
-            [build] llvm <host>
-            [build] rustc 0 <host> -> rustc 1 <host>
-            [build] rustdoc 0 <host>
-            [doc] std 1 <host> crates=[core]
-            ");
-        }
+
+        insta::assert_snapshot!(
+            ctx.config("doc")
+                .path("core")
+                .override_target_no_std(&host_target())
+                .render_steps(), @r"
+        [build] llvm <host>
+        [build] rustc 0 <host> -> rustc 1 <host>
+        [build] rustdoc 0 <host>
+        [doc] std 1 <host> crates=[core]
+        ");
     }
 
     #[test]
     fn doc_library_no_std_target() {
         let ctx = TestCtx::new();
-        if host_target() == "x86_64-unknown-linux-gnu" {
-            insta::assert_snapshot!(
-                ctx.config("doc")
-                    .path("library")
-                    .override_target_no_std(&host_target())
-                    .render_steps(), @r"
-            [build] llvm <host>
-            [build] rustc 0 <host> -> rustc 1 <host>
-            [build] rustc 0 <host> -> LldWrapper 1 <host>
-            [build] rustdoc 0 <host>
-            [doc] std 1 <host> crates=[alloc,core]
-            ");
-        } else {
-            insta::assert_snapshot!(
-                ctx.config("doc")
-                    .path("library")
-                    .override_target_no_std(&host_target())
-                    .render_steps(), @r"
-            [build] llvm <host>
-            [build] rustc 0 <host> -> rustc 1 <host>
-            [build] rustdoc 0 <host>
-            [doc] std 1 <host> crates=[alloc,core]
-            ");
-        }
+
+        insta::assert_snapshot!(
+            ctx.config("doc")
+                .path("library")
+                .override_target_no_std(&host_target())
+                .render_steps(), @r"
+        [build] llvm <host>
+        [build] rustc 0 <host> -> rustc 1 <host>
+        [build] rustdoc 0 <host>
+        [doc] std 1 <host> crates=[alloc,core]
+        ");
     }
 
     #[test]

src/bootstrap/src/core/config/toml/rust.rs

@@ -409,6 +409,14 @@ pub(crate) fn validate_codegen_backends(backends: Vec<String>, section: &str) ->
     }
     backends
 }
+#[cfg(not(test))]
+fn default_lld_opt_in_targets() -> &'static [&'static str] {
+    &["x86_64-unknown-linux-gnu"]
+}
+#[cfg(test)]
+fn default_lld_opt_in_targets() -> &'static [&'static str] {
+    &[]
+}
 
 impl Config {
     pub fn apply_rust_config(&mut self, toml_rust: Option<Rust>, warnings: Warnings) {
@@ -609,7 +617,8 @@ impl Config {
         //   thus, disabled
         // - similarly, lld will not be built nor used by default when explicitly asked not to, e.g.
         //   when the config sets `rust.lld = false`
-        if self.host_target.triple == "x86_64-unknown-linux-gnu" && self.hosts == [self.host_target]
+        if default_lld_opt_in_targets().contains(&self.host_target.triple.to_string().as_str())
+            && self.hosts == [self.host_target]
         {
             let no_llvm_config = self
                 .target_config