diff --git a/src/library/compiler/emit_cpp.cpp b/src/library/compiler/emit_cpp.cpp
index 7d5423bf76..0417bff752 100644
--- a/src/library/compiler/emit_cpp.cpp
+++ b/src/library/compiler/emit_cpp.cpp
@@ -5,10 +5,65 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Author: Leonardo de Moura
 */
 #include <fstream>
+#include "runtime/utf8.h"
 #include "library/compiler/emit_cpp.h"
 
 namespace lean {
-environment emit_cpp(environment const & env, comp_decls const &) {
+static std::string mangle(std::string const & s) {
+    std::string out;
+    size_t i = 0;
+    while (i < s.size()) {
+        unsigned c = next_utf8(s, i);
+        if (c < 255) {
+            if (isalnum(c)) {
+                out += static_cast<unsigned char>(c);
+            } else if (c == '_') {
+                out += "__";
+            } else {
+                out += "_x";
+                out += ('0' + (c / 16));
+                out += ('0' + (c % 16));
+            }
+        } else {
+            out += "_u";
+            out += ('0' + (c / 4096));
+            c %= 4096;
+            out += ('0' + (c / 256));
+            c %= 256;
+            out += ('0' + (c / 16));
+            out += ('0' + (c % 16));
+        }
+    }
+    return out;
+}
+
+static void mangle(name const & n, std::string & out) {
+    if (n.is_anonymous()) {
+        return;
+    } else if (n.is_numeral()) {
+        mangle(n.get_prefix(), out);
+        out += "_";
+        out += n.get_numeral().to_std_string();
+        out += "_";
+    } else {
+        lean_assert(n.is_string());
+        mangle(n.get_prefix(), out);
+        out += "_s";
+        std::string s = mangle(n.get_string().to_std_string());
+        unsigned len  = s.size();
+        out += std::to_string(len);
+        out += "_";
+        out += s;
+    }
+}
+
+std::string mangle(name const & n) {
+    std::string out("_l");
+    mangle(n, out);
+    return out;
+}
+
+environment emit_cpp(environment const & env, comp_decls const & /* ds */) {
     // TODO(Leo)
     return env;
 }