expand-response-params: Pull out of cc-wrapper

No hashes were changed

pkgs/build-support/expand-response-params/default.nix

@@ -0,0 +1,13 @@
+{ stdenv }:
+
+stdenv.mkDerivation {
+  name = "expand-response-params";
+  src = ./expand-response-params.c;
+  buildCommand = ''
+    # Work around "stdenv-darwin-boot-2 is not allowed to refer to path /nix/store/...-expand-response-params.c"
+    cp "$src" expand-response-params.c
+    "$CC" -std=c99 -O3 -o "$out" expand-response-params.c
+    strip -S $out
+    ${stdenv.lib.optionalString stdenv.hostPlatform.isLinux "patchelf --shrink-rpath $out"}
+  '';
+}