Description: Use system compiler-rt from clang, EXPERIMENTAL AND NOT WORKING YET
Forwarded: not-needed
--- a/src/bootstrap/compile.rs
+++ b/src/bootstrap/compile.rs
@@ -200,6 +200,12 @@
         let mut features = builder.std_features();
         features.push_str(&compiler_builtins_c_feature);
 
+        // In Debian this is always available
+        let llvm_config = builder.ensure(native::Llvm {
+            target: builder.config.build,
+            emscripten: false,
+        });
+        cargo.env("LLVM_CONFIG", llvm_config);
         if compiler.stage != 0 && builder.config.sanitizers {
             // This variable is used by the sanitizer runtime crates, e.g.
             // rustc_lsan, to build the sanitizer runtime from C code
@@ -208,11 +214,6 @@
             // missing
             // We also only build the runtimes when --enable-sanitizers (or its
             // config.toml equivalent) is used
-            let llvm_config = builder.ensure(native::Llvm {
-                target: builder.config.build,
-                emscripten: false,
-            });
-            cargo.env("LLVM_CONFIG", llvm_config);
             cargo.env("RUSTC_BUILD_SANITIZERS", "1");
         }
 
--- a/vendor/compiler_builtins/Cargo.toml
+++ b/vendor/compiler_builtins/Cargo.toml
@@ -49,7 +49,7 @@
 # LLVM_CONFIG or CLANG (more reliable) must be set.
 c-system = []
 
-c = ["c-vendor"]
+c = ["c-system"]
 compiler-builtins = []
 default = ["compiler-builtins"]
 mangled-names = []