2 files changed, 40 insertions, 0 deletions
diff --git a/pkgs/build-support/rust/rustc-wrapper/default.nix b/pkgs/build-support/rust/rustc-wrapper/default.nix
new file mode 100644
index 000000000000..06cfcbb5457f
--- /dev/null
+++ b/pkgs/build-support/rust/rustc-wrapper/default.nix
@@ -0,0 +1,29 @@
+{ lib, runCommand, rustc-unwrapped }:
+
+runCommand "${rustc-unwrapped.pname}-wrapper-${rustc-unwrapped.version}" {
+  preferLocalBuild = true;
+  strictDeps = true;
+  inherit (rustc-unwrapped) outputs;
+
+  env = {
+    prog = "${rustc-unwrapped}/bin/rustc";
+  };
+
+  passthru = {
+    inherit (rustc-unwrapped) pname version src llvm llvmPackages;
+    unwrapped = rustc-unwrapped;
+  };
+
+  meta = rustc-unwrapped.meta // {
+    description = "${rustc-unwrapped.meta.description} (wrapper script)";
+    priority = 10;
+  };
+} ''
+  mkdir -p $out/bin
+  ln -s ${rustc-unwrapped}/bin/* $out/bin
+  rm $out/bin/rustc
+  substituteAll ${./rustc-wrapper.sh} $out/bin/rustc
+  chmod +x $out/bin/rustc
+  ${lib.concatMapStrings (output: "ln -s ${rustc-unwrapped.${output}} \$${output}\n")
+    (lib.remove "out" rustc-unwrapped.outputs)}
+''
diff --git a/pkgs/build-support/rust/rustc-wrapper/rustc-wrapper.sh b/pkgs/build-support/rust/rustc-wrapper/rustc-wrapper.sh
new file mode 100644
index 000000000000..866a6912e090
--- /dev/null
+++ b/pkgs/build-support/rust/rustc-wrapper/rustc-wrapper.sh
@@ -0,0 +1,11 @@
+#!@shell@
+
+# Optionally print debug info.
+if (( "${NIX_DEBUG:-0}" >= 1 )); then
+    echo "original flags to @prog@:" >&2
+    printf "  %q\n" "$@" >&2
+    echo "extra flags after to @prog@:" >&2
+    printf "  %q\n" $NIX_RUSTFLAGS >&2
+fi
+
+exec @prog@ "$@" $NIX_RUSTFLAGS