Merge pull request #112449 from angerman/angerman/response-files

Add response file support when compiling with clang

pkgs/build-support/cc-wrapper/cc-wrapper.sh

@@ -198,7 +198,15 @@ fi
 
 PATH="$path_backup"
 # Old bash workaround, see above.
-exec @prog@ \
-    ${extraBefore+"${extraBefore[@]}"} \
-    ${params+"${params[@]}"} \
-    ${extraAfter+"${extraAfter[@]}"}
+
+if (( "${NIX_CC_USE_RESPONSE_FILE:-@use_response_file_by_default@}" >= 1 )); then
+    exec @prog@ "@<(printf "%q\n" \
+       ${extraBefore+"${extraBefore[@]}"} \
+       ${params+"${params[@]}"} \
+       ${extraAfter+"${extraAfter[@]}"})"
+else
+    exec @prog@ \
+       ${extraBefore+"${extraBefore[@]}"} \
+       ${params+"${params[@]}"} \
+       ${extraAfter+"${extraAfter[@]}"}
+fi

pkgs/build-support/cc-wrapper/default.nix

@@ -160,6 +160,7 @@ stdenv.mkDerivation {
         local dst="$1"
         local wrapper="$2"
         export prog="$3"
+        export use_response_file_by_default=${if isClang then "1" else "0"}
         substituteAll "$wrapper" "$out/bin/$dst"
         chmod +x "$out/bin/$dst"
       }