gccgo: wrap go binary (#207670)

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

@@ -264,6 +264,7 @@ stdenv.mkDerivation {
 
     + optionalString cc.langGo or false ''
       wrap ${targetPrefix}gccgo $wrapper $ccPath/${targetPrefix}gccgo
+      wrap ${targetPrefix}go ${./go-wrapper.sh} $ccPath/${targetPrefix}go
     '';
 
   strictDeps = true;

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

@@ -0,0 +1,11 @@
+#! @shell@
+set -eu -o pipefail +o posix
+shopt -s nullglob
+
+if (( "${NIX_DEBUG:-0}" >= 7 )); then
+    set -x
+fi
+
+export GCCGO="@out@/bin/gccgo"
+
+exec @prog@ "$@"