diff --git a/.gitmodules b/.gitmodules
index dc081eedea4..f6262ecb05b 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -17,6 +17,7 @@
 	path = contracts/libc++/upstream
 	url = https://github.com/EOSIO/libcxx.git
 	branch = eosio
-[submodule "external/binaryen"]
-	path = external/binaryen
-	url = https://github.com/EOSIO/binaryen.git
+[submodule "externals/binaryen"]
+	path = externals/binaryen
+	url = https://github.com/EOSIO/binaryen
+
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 799be7dc5c9..60dbd71638c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -164,7 +164,7 @@ if(ENABLE_COVERAGE_TESTING)
   find_program( GENHTML_PATH NAMES genhtml)
 endif()
 
-add_subdirectory(external)
+add_subdirectory( externals )
 
 include(wasm)
 if(WASM_TOOLCHAIN_FOUND)
diff --git a/CMakeModules/wasm.cmake b/CMakeModules/wasm.cmake
index 7a96ee7db47..d7518f1a242 100644
--- a/CMakeModules/wasm.cmake
+++ b/CMakeModules/wasm.cmake
@@ -148,7 +148,7 @@ macro(add_wast_executable)
 
   add_custom_command(OUTPUT ${DESTINATION_FOLDER}/${target}.wast
     DEPENDS ${target}.s
-    COMMAND "$<TARGET_FILE:s2wasm>" -o ${DESTINATION_FOLDER}/${target}.wast -s 4096 ${MAX_MEMORY_PARAM} ${target}.s
+    COMMAND $<TARGET_FILE:eosio-s2wasm> -o ${DESTINATION_FOLDER}/${target}.wast -s 4096 ${MAX_MEMORY_PARAM} ${target}.s
     COMMENT "Generating WAST ${target}.wast"
     WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
     VERBATIM
diff --git a/eosio_build.sh b/eosio_build.sh
index f5d842b12e4..001971d9f37 100755
--- a/eosio_build.sh
+++ b/eosio_build.sh
@@ -119,8 +119,8 @@
 	
 	# Build EOS
 	$CMAKE -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE} -DCMAKE_CXX_COMPILER=${CXX_COMPILER} \
-        -DCMAKE_C_COMPILER=${C_COMPILER} -DWASM_ROOT=${WASM_ROOT} \
-        -DOPENSSL_ROOT_DIR=${OPENSSL_ROOT_DIR} \
+  -DCMAKE_C_COMPILER=${C_COMPILER} -DWASM_ROOT=${WASM_ROOT} \
+  -DOPENSSL_ROOT_DIR=${OPENSSL_ROOT_DIR} \
 	-DOPENSSL_LIBRARIES=${OPENSSL_LIBRARIES} ..
 	if [ $? -ne 0 ]; then
 		printf "\n\t>>>>>>>>>>>>>>>>>>>> CMAKE building EOSIO has exited with the above error.\n\n"
diff --git a/externals/CMakeLists.txt b/externals/CMakeLists.txt
new file mode 100644
index 00000000000..4fac3528746
--- /dev/null
+++ b/externals/CMakeLists.txt
@@ -0,0 +1 @@
+add_subdirectory( binaryen )
diff --git a/externals/binaryen b/externals/binaryen
new file mode 160000
index 00000000000..0b980a9e877
--- /dev/null
+++ b/externals/binaryen
@@ -0,0 +1 @@
+Subproject commit 0b980a9e87740db4d657ee38b2668da35752264e
diff --git a/libraries/chain/name.cpp b/libraries/chain/name.cpp
index 262e2dc221a..6cb09b34906 100644
--- a/libraries/chain/name.cpp
+++ b/libraries/chain/name.cpp
@@ -7,12 +7,13 @@
 namespace eosio { namespace chain { 
 
    void name::set( const char* str ) {
-   try {
-      const auto len = strnlen(str,14);
-      EOS_ASSERT( len <= 13, name_type_exception, "Name is longer than 13 characters (${name}) ", ("name",string(str)) );
+      const auto len = strnlen(str, 14);
+      EOS_ASSERT(len <= 13, name_type_exception, "Name is longer than 13 characters (${name}) ", ("name", string(str)));
       value = string_to_name(str);
-      EOS_ASSERT( to_string() == string(str), name_type_exception, "Name not properly normalized (name: ${name}, normalized: ${normalized}) ", ("name",string(str))("normalized",to_string())  );
-   }FC_CAPTURE_AND_RETHROW( (str) ) }
+      EOS_ASSERT(to_string() == string(str), name_type_exception,
+                 "Name not properly normalized (name: ${name}, normalized: ${normalized}) ",
+                 ("name", string(str))("normalized", to_string()));
+   }
 
    name::operator string()const {
      static const char* charmap = ".12345abcdefghijklmnopqrstuvwxyz";
diff --git a/plugins/account_history_api_plugin/account_history_api_plugin.cpp b/plugins/account_history_api_plugin/account_history_api_plugin.cpp
index 242a20ea198..2202adda3f2 100644
--- a/plugins/account_history_api_plugin/account_history_api_plugin.cpp
+++ b/plugins/account_history_api_plugin/account_history_api_plugin.cpp
@@ -28,11 +28,11 @@ void account_history_api_plugin::plugin_initialize(const variables_map&) {}
              auto result = api_handle.call_name(fc::json::from_string(body).as<api_namespace::call_name ## _params>()); \
              cb(200, fc::json::to_string(result)); \
           } catch (fc::eof_exception& e) { \
-             error_results results{400, "Bad Request", e.to_string()}; \
+             error_results results{400, "Bad Request", e}; \
              cb(400, fc::json::to_string(results)); \
              elog("Unable to parse arguments: ${args}", ("args", body)); \
           } catch (fc::exception& e) { \
-             error_results results{500, "Internal Service Error", e.to_detail_string()}; \
+             error_results results{500, "Internal Service Error", e}; \
              cb(500, fc::json::to_string(results)); \
              elog("Exception encountered while processing ${call}: ${e}", ("call", #api_name "." #call_name)("e", e)); \
           } \
diff --git a/plugins/chain_api_plugin/chain_api_plugin.cpp b/plugins/chain_api_plugin/chain_api_plugin.cpp
index 3f2deb2f2c1..a51cb21a19d 100644
--- a/plugins/chain_api_plugin/chain_api_plugin.cpp
+++ b/plugins/chain_api_plugin/chain_api_plugin.cpp
@@ -36,20 +36,20 @@ void chain_api_plugin::plugin_initialize(const variables_map&) {}
              auto result = api_handle.call_name(fc::json::from_string(body).as<api_namespace::call_name ## _params>()); \
              cb(http_response_code, fc::json::to_string(result)); \
           } catch (chain::tx_missing_sigs& e) { \
-             error_results results{401, "UnAuthorized", e.to_string()}; \
+             error_results results{401, "UnAuthorized", e}; \
              cb(401, fc::json::to_string(results)); \
           } catch (chain::tx_duplicate& e) { \
-             error_results results{409, "Conflict", e.to_string()}; \
+             error_results results{409, "Conflict", e}; \
              cb(409, fc::json::to_string(results)); \
           } catch (chain::transaction_exception& e) { \
-             error_results results{400, "Bad Request", e.to_string()}; \
+             error_results results{400, "Bad Request", e}; \
              cb(400, fc::json::to_string(results)); \
           } catch (fc::eof_exception& e) { \
-             error_results results{400, "Bad Request", e.to_string()}; \
+             error_results results{400, "Bad Request", e}; \
              cb(400, fc::json::to_string(results)); \
              elog("Unable to parse arguments: ${args}", ("args", body)); \
           } catch (fc::exception& e) { \
-             error_results results{500, "Internal Service Error", e.to_detail_string()}; \
+             error_results results{500, "Internal Service Error", e}; \
              cb(500, fc::json::to_string(results)); \
              elog("Exception encountered while processing ${call}: ${e}", ("call", #api_name "." #call_name)("e", e)); \
           } \
diff --git a/plugins/faucet_testnet_plugin/faucet_testnet_plugin.cpp b/plugins/faucet_testnet_plugin/faucet_testnet_plugin.cpp
index f9bf9f2305e..6b7acb31eef 100644
--- a/plugins/faucet_testnet_plugin/faucet_testnet_plugin.cpp
+++ b/plugins/faucet_testnet_plugin/faucet_testnet_plugin.cpp
@@ -63,11 +63,11 @@ using results_pair = std::pair<uint32_t,fc::variant>;
              const auto result = api_handle->invoke_cb(body); \
              response_cb(result.first, fc::json::to_string(result.second)); \
           } catch (fc::eof_exception& e) { \
-             error_results results{400, "Bad Request", e.to_string()}; \
+             error_results results{400, "Bad Request", e}; \
              response_cb(400, fc::json::to_string(results)); \
              elog("Unable to parse arguments: ${args}", ("args", body)); \
           } catch (fc::exception& e) { \
-             error_results results{500, "Internal Service Error", e.to_detail_string()}; \
+             error_results results{500, "Internal Service Error", e}; \
              response_cb(500, fc::json::to_string(results)); \
              elog("Exception encountered while processing ${call}: ${e}", ("call", #api_name "." #call_name)("e", e)); \
           } \
diff --git a/plugins/http_plugin/http_plugin.cpp b/plugins/http_plugin/http_plugin.cpp
index 7f853401aa8..1c62389ccf2 100644
--- a/plugins/http_plugin/http_plugin.cpp
+++ b/plugins/http_plugin/http_plugin.cpp
@@ -186,25 +186,25 @@ namespace eosio {
                      } else {
                         wlog("404 - not found: ${ep}", ("ep",resource));
                         error_results results{websocketpp::http::status_code::not_found,
-                                              "Not Found", "Unknown Endpoint"};
+                                              "Not Found", fc::exception(FC_LOG_MESSAGE(error, "Unknown Endpoint"))};
                         con->set_body(fc::json::to_string(results));
                         con->set_status(websocketpp::http::status_code::not_found);
                      }
                   } catch( const fc::exception& e ) {
                      elog( "http: ${e}", ("e",e.to_detail_string()));
                      error_results results{websocketpp::http::status_code::internal_server_error,
-                                           "Internal Service Error", e.to_detail_string()};
+                                           "Internal Service Error", e};
                      con->set_body(fc::json::to_string(results));
                      con->set_status(websocketpp::http::status_code::internal_server_error);
                   } catch( const std::exception& e ) {
                      elog( "http: ${e}", ("e",e.what()));
                      error_results results{websocketpp::http::status_code::internal_server_error,
-                                           "Internal Service Error", e.what()};
+                                           "Internal Service Error", fc::exception(FC_LOG_MESSAGE(error, e.what()))};
                      con->set_body(fc::json::to_string(results));
                      con->set_status(websocketpp::http::status_code::internal_server_error);
                   } catch( ... ) {
                      error_results results{websocketpp::http::status_code::internal_server_error,
-                                           "Internal Service Error", "unknown exception"};
+                                           "Internal Service Error", fc::exception(FC_LOG_MESSAGE(error, "Unknown Exception"))};
                      con->set_body(fc::json::to_string(results));
                      con->set_status(websocketpp::http::status_code::internal_server_error);
                   }
diff --git a/plugins/http_plugin/include/eosio/http_plugin/http_plugin.hpp b/plugins/http_plugin/include/eosio/http_plugin/http_plugin.hpp
index 428f4f3e8e7..3ee8851154b 100644
--- a/plugins/http_plugin/include/eosio/http_plugin/http_plugin.hpp
+++ b/plugins/http_plugin/include/eosio/http_plugin/http_plugin.hpp
@@ -4,6 +4,7 @@
  */
 #pragma once
 #include <appbase/application.hpp>
+#include <fc/exception/exception.hpp>
 
 #include <fc/reflect/reflect.hpp>
 
@@ -80,10 +81,36 @@ namespace eosio {
     * @brief Structure used to create JSON error responses
     */
    struct error_results {
-     uint16_t code;
-     string message;
-     string details;
+      struct error_detail {
+         int64_t code;
+         string name;
+         string message;
+         string details;
+         vector<fc::log_context> stack_trace;
+
+         static const uint8_t stack_trace_limit = 10;
+
+         error_detail() {};
+
+         error_detail(const fc::exception& exc) {
+            code = exc.code();
+            name = exc.name();
+            message = exc.what();
+            details = exc.top_message();
+            for (auto itr = exc.get_log().begin(); itr != exc.get_log().end(); ++itr) {
+               // Prevent sending trace that are too big
+               if (stack_trace.size() >= stack_trace_limit) break;
+               // Append context
+               stack_trace.emplace_back(itr->get_context());
+            }
+         }
+      };
+
+      uint16_t code;
+      string message;
+      error_detail error;
    };
 }
 
-FC_REFLECT(eosio::error_results, (code)(message)(details))
+FC_REFLECT(eosio::error_results::error_detail, (code)(name)(message)(details)(stack_trace))
+FC_REFLECT(eosio::error_results, (code)(message)(error))
diff --git a/plugins/net_api_plugin/net_api_plugin.cpp b/plugins/net_api_plugin/net_api_plugin.cpp
index f8651e3a6e2..54d3d25c104 100644
--- a/plugins/net_api_plugin/net_api_plugin.cpp
+++ b/plugins/net_api_plugin/net_api_plugin.cpp
@@ -31,11 +31,11 @@ using namespace eosio;
              INVOKE \
              cb(http_response_code, fc::json::to_string(result)); \
           } catch (fc::eof_exception& e) { \
-             error_results results{400, "Bad Request", e.to_string()}; \
+             error_results results{400, "Bad Request", e}; \
              cb(400, fc::json::to_string(results)); \
              elog("Unable to parse arguments: ${args}", ("args", body)); \
           } catch (fc::exception& e) { \
-             error_results results{500, "Internal Service Error", e.to_detail_string()}; \
+             error_results results{500, "Internal Service Error", e}; \
              cb(500, fc::json::to_string(results)); \
              elog("Exception encountered while processing ${call}: ${e}", ("call", #api_name "." #call_name)("e", e)); \
           } \
diff --git a/plugins/txn_test_gen_plugin/txn_test_gen_plugin.cpp b/plugins/txn_test_gen_plugin/txn_test_gen_plugin.cpp
index f4e442af7ac..1bc02dd246e 100644
--- a/plugins/txn_test_gen_plugin/txn_test_gen_plugin.cpp
+++ b/plugins/txn_test_gen_plugin/txn_test_gen_plugin.cpp
@@ -46,11 +46,11 @@ using namespace eosio::chain;
              INVOKE \
              cb(http_response_code, fc::json::to_string(result)); \
           } catch (fc::eof_exception& e) { \
-             error_results results{400, "Bad Request", e.to_string()}; \
+             error_results results{400, "Bad Request", e}; \
              cb(400, fc::json::to_string(results)); \
              elog("Unable to parse arguments: ${args}", ("args", body)); \
           } catch (fc::exception& e) { \
-             error_results results{500, "Internal Service Error", e.to_detail_string()}; \
+             error_results results{500, "Internal Service Error", e}; \
              cb(500, fc::json::to_string(results)); \
              elog("Exception encountered while processing ${call}: ${e}", ("call", #api_name "." #call_name)("e", e)); \
           } \
diff --git a/plugins/wallet_api_plugin/wallet_api_plugin.cpp b/plugins/wallet_api_plugin/wallet_api_plugin.cpp
index c4ae48e8cdf..4bd46dec174 100644
--- a/plugins/wallet_api_plugin/wallet_api_plugin.cpp
+++ b/plugins/wallet_api_plugin/wallet_api_plugin.cpp
@@ -32,11 +32,11 @@ using namespace eosio;
              INVOKE \
              cb(http_response_code, fc::json::to_string(result)); \
           } catch (fc::eof_exception& e) { \
-             error_results results{400, "Bad Request", e.to_string()}; \
+             error_results results{400, "Bad Request", e}; \
              cb(400, fc::json::to_string(results)); \
              elog("Unable to parse arguments: ${args}", ("args", body)); \
           } catch (fc::exception& e) { \
-             error_results results{500, "Internal Service Error", e.to_detail_string()}; \
+             error_results results{500, "Internal Service Error", e}; \
              cb(500, fc::json::to_string(results)); \
              elog("Exception encountered while processing ${call}: ${e}", ("call", #api_name "." #call_name)("e", e)); \
           } \
diff --git a/programs/eosioc/help_text.cpp b/programs/eosioc/help_text.cpp
index 2f799d58d81..5b8f6f06107 100644
--- a/programs/eosioc/help_text.cpp
+++ b/programs/eosioc/help_text.cpp
@@ -5,6 +5,7 @@
 #include "help_text.hpp"
 #include "localize.hpp"
 #include <regex>
+#include <fc/io/json.hpp>
 
 using namespace eosio::client::localize;
 
@@ -182,22 +183,25 @@ e.g.
   }]
 })=====";
 
+const char* error_advice_3030002 =  R"=====(Ensure that you have the related private keys inside your wallet)=====";
+
 const std::map<int64_t, std::string> error_advice = {
    { 3120001, error_advice_3120001 },
    { 3120002, error_advice_3120002 },
    { 3120003, error_advice_3120003 },
    { 3120004, error_advice_3120004 },
    { 3120005, error_advice_3120005 },
-   { 3120006, error_advice_3120006 }
+   { 3120006, error_advice_3120006 },
+   { 3030002, error_advice_3030002 }
 };
 
 
 namespace eosio { namespace client { namespace help {
-bool print_recognized_error_code(const fc::exception& e) {
+bool print_recognized_error_code(const fc::exception& e, const bool verbose_errors) {
    // eos recognized error code is from 3000000 to 3999999
    // refer to libraries/chain/include/eosio/chain/exceptions.hpp
    if (e.code() >= 3000000 && e.code() <= 3999999) {
-      std::string advice, explanation;
+      std::string advice, explanation, stack_trace;
 
       // Get advice, if any
       const auto advice_itr = error_advice.find(e.code());
@@ -209,21 +213,35 @@ bool print_recognized_error_code(const fc::exception& e) {
          if (!log.get_format().empty()) {
             // Localize the message as needed
             explanation += "\n  " + localized_with_variant(log.get_format().data(), log.get_data());
+         } else if (log.get_data().size() > 0 && verbose_errors) {
+            // Show data-only log only if verbose_errors option is enabled
+            explanation += "\n  " + fc::json::to_string(log.get_data());
+         }
+         // Check if there's stack trace to be added
+         if (!log.get_context().get_method().empty() && verbose_errors) {
+            stack_trace += "\n  " +
+                           log.get_context().get_file() +  ":" +
+                           fc::to_string(log.get_context().get_line_number())  + " " +
+                           log.get_context().get_method();
          }
       }
+      // Append header
       if (!explanation.empty()) explanation = std::string("Error Details:") + explanation;
+      if (!stack_trace.empty()) stack_trace = std::string("Stack Trace:") + stack_trace;
 
       std::cerr << "\033[31m" << "Error " << e.code() << ": " << e.what() << "\033[0m";
       if (!advice.empty()) std::cerr << "\n" << "\033[32m" << advice << "\033[0m";
-      if (!explanation.empty()) std::cerr  << "\n" << "\033[33m" << explanation << "\033[0m" << std::endl;
+      if (!explanation.empty()) std::cerr  << "\n" << "\033[33m" << explanation << "\033[0m";
+      if (!stack_trace.empty()) std::cerr  << "\n" << stack_trace;
+      std::cerr << std::endl;
       return true;
    }
    return false;
 }
 
-bool print_help_text(const fc::exception& e) {
+bool print_help_text(const fc::exception& e, const bool verbose_errors) {
    // Check if the exception has recognized error code
-   if (print_recognized_error_code(e)) return true;
+   if (print_recognized_error_code(e, verbose_errors)) return true;
    bool result = false;
    // Large input strings to std::regex can cause SIGSEGV, this is a known bug in libstdc++.
    // See https://stackoverflow.com/questions/36304204/%D0%A1-regex-segfault-on-long-sequences
diff --git a/programs/eosioc/help_text.hpp b/programs/eosioc/help_text.hpp
index 9a05e176af4..a62652bdcc2 100644
--- a/programs/eosioc/help_text.hpp
+++ b/programs/eosioc/help_text.hpp
@@ -6,5 +6,5 @@
 #include <fc/exception/exception.hpp>
 
 namespace eosio { namespace client { namespace help {
-   bool print_help_text(const fc::exception& e);
+   bool print_help_text(const fc::exception& e, const bool verbose_errors);
 }}}
\ No newline at end of file
diff --git a/programs/eosioc/httpc.cpp b/programs/eosioc/httpc.cpp
index dc433b7c373..cbdc6d2c25a 100644
--- a/programs/eosioc/httpc.cpp
+++ b/programs/eosioc/httpc.cpp
@@ -16,6 +16,8 @@
 #include <fc/variant.hpp>
 #include <fc/io/json.hpp>
 #include <fc/exception/exception.hpp>
+#include <eosio/http_plugin/http_plugin.hpp>
+#include <eosio/chain_plugin/chain_plugin.hpp>
 
 using boost::asio::ip::tcp;
 
@@ -106,13 +108,34 @@ fc::variant call( const std::string& server, uint16_t port,
          throw boost::system::system_error(error);
 
      //  std::cout << re.str() <<"\n";
+       const auto response_result = fc::json::from_string(re.str());
        if( status_code == 200 || status_code == 201 || status_code == 202 ) {
-          return fc::json::from_string(re.str());
+          return response_result;
+       } else {
+          auto &&error = response_result.as<eosio::error_results>().error;
+
+          // eos recognized error code is from 3000000 to 3999999
+          // refer to libraries/chain/include/eosio/chain/exceptions.hpp
+          if (error.code >= 3000000 && error.code <= 3999999) {
+             // Construct fc exception from error
+             const auto &stack_trace = error.stack_trace;
+             fc::exception new_exception(error.code, error.name, error.message);
+             if (stack_trace.empty()) {
+                new_exception.append_log(FC_LOG_MESSAGE(error, error.details));
+             } else {
+                for (auto itr = stack_trace.begin(); itr != stack_trace.end(); itr++) {
+                   const auto &error_message = itr == stack_trace.begin() ? error.details : std::string();
+                   new_exception.append_log(fc::log_message(*itr, error_message));
+                }
+             }
+             throw new_exception;
+          }
        }
 
        FC_ASSERT( status_code == 200, "Error code ${c}\n: ${msg}\n", ("c", status_code)("msg", re.str()) );
     }
 
     FC_ASSERT( !"unable to connect" );
-  } FC_CAPTURE_AND_RETHROW( (server)(port)(path)(postdata) ) 
+  } FC_RETHROW_EXCEPTIONS( error, "Request Path: ${server}:${port}${path}\n  Request Post Data: ${postdata}}" ,
+                           ("server", server)("port", port)("path", path)("postdata", postdata) )
 }
diff --git a/programs/eosioc/main.cpp b/programs/eosioc/main.cpp
index 16a14ea1442..f5973a7253e 100644
--- a/programs/eosioc/main.cpp
+++ b/programs/eosioc/main.cpp
@@ -1006,7 +1006,7 @@ int main( int argc, char** argv ) {
          }
       } else {
          // attempt to extract the error code if one is present
-         if (verbose_errors || !print_help_text(e)) {
+         if (!print_help_text(e, verbose_errors) && verbose_errors) {
             elog("Failed with error: ${e}", ("e", verbose_errors ? e.to_detail_string() : e.to_string()));
          }
       }
diff --git a/scripts/eosio_build_amazon.sh b/scripts/eosio_build_amazon.sh
index b2e51cfba02..efa49cf05e2 100644
--- a/scripts/eosio_build_amazon.sh
+++ b/scripts/eosio_build_amazon.sh
@@ -172,27 +172,6 @@
 		printf "\tsecp256k1 found\n"
 	fi
 	
-	printf "\n\tChecking for binaryen\n"
-	if [ ! -d ${HOME}/opt/binaryen ]; then
-		# Install binaryen v1.37.14:
-		printf "\tInstalling binaryen v1.37.14:\n"
-		cd ${TEMP_DIR}
-		git clone https://github.com/WebAssembly/binaryen
-		cd binaryen
-		git checkout tags/1.37.14
-		$CMAKE . && make -j${CPU_CORE}
-		if [ $? -ne 0 ]; then
-			printf "\tError compiling binaryen.\n"
-			printf "\tExiting now.\n\n"
-			exit;
-		fi
-		mkdir -p ${HOME}/opt/binaryen/ 2>/dev/null
-		mv ${TEMP_DIR}/binaryen/bin ${HOME}/opt/binaryen/
-		rm -rf ${TEMP_DIR}/binaryen
-	else
-		printf "\tBinaryen found at ${HOME}/opt/binaryen\n"
-	fi
-	
 	printf "\n\tChecking for LLVM with WASM support.\n"
 	if [ ! -d ${HOME}/opt/wasm/bin ]; then
 		# Build LLVM and clang with EXPERIMENTAL WASM support:
diff --git a/scripts/eosio_build_darwin.sh b/scripts/eosio_build_darwin.sh
index 5242462687b..ab253023ed2 100644
--- a/scripts/eosio_build_darwin.sh
+++ b/scripts/eosio_build_darwin.sh
@@ -181,26 +181,6 @@
 		printf "\tsecp256k1 found at /usr/local/lib/\n"
 	fi
 
-	printf "\n\tChecking for binaryen\n"
-	if [ ! -e /usr/local/binaryen/bin/binaryen.js ]; then
-		cd ${TEMP_DIR}
-		git clone https://github.com/WebAssembly/binaryen
-		cd binaryen
-		git checkout tags/1.37.14
-		cmake . && make -j${CPU_CORE}
-		if [ $? -ne 0 ]; then
-			printf "\tError compiling binaryen.\n"
-			printf "\tExiting now.\n\n"
-			exit;
-		fi
-		sudo mkdir /usr/local/binaryen
-		sudo mv ${TEMP_DIR}/binaryen/bin /usr/local/binaryen
-		sudo ln -s /usr/local/binaryen/bin/* /usr/local
-		sudo rm -rf ${TEMP_DIR}/binaryen
-	else
-		printf "\tBinaryen found at /usr/local/binaryen/bin/\n"
-	fi
-
 	printf "\n\tChecking for WASM\n"
 	if [ ! -d /usr/local/wasm/bin ]; then
 		# Build LLVM and clang for WASM:
diff --git a/scripts/eosio_build_fedora.sh b/scripts/eosio_build_fedora.sh
index 94a83e93854..159fb37d34d 100644
--- a/scripts/eosio_build_fedora.sh
+++ b/scripts/eosio_build_fedora.sh
@@ -145,27 +145,6 @@
 		printf "\tsecp256k1 found\n"
 	fi
 	
-	printf "\n\tChecking for binaryen\n"
-	if [ ! -d ${HOME}/opt/binaryen ]; then
-		# Install binaryen v1.37.14:
-		printf "\tInstalling binaryen v1.37.14:\n"
-		cd ${TEMP_DIR}
-		git clone https://github.com/WebAssembly/binaryen
-		cd binaryen
-		git checkout tags/1.37.14
-		cmake . && make -j${CPU_CORE}
-		if [ $? -ne 0 ]; then
-			printf "\tError compiling binaryen.\n"
-			printf "\tExiting now.\n\n"
-			exit;
-		fi
-		mkdir -p ${HOME}/opt/binaryen/ 2>/dev/null
-		mv ${TEMP_DIR}/binaryen/bin ${HOME}/opt/binaryen/
-		rm -rf ${TEMP_DIR}/binaryen
-	else
-		printf "\tBinaryen found at ${HOME}/opt/binaryen\n"
-	fi
-	
 	printf "\n\tChecking for LLVM with WASM support.\n"
 	if [ ! -d ${HOME}/opt/wasm/bin ]; then
 		# Build LLVM and clang with EXPERIMENTAL WASM support:
diff --git a/scripts/eosio_build_ubuntu.sh b/scripts/eosio_build_ubuntu.sh
index 6c3926ea26a..c394167d561 100644
--- a/scripts/eosio_build_ubuntu.sh
+++ b/scripts/eosio_build_ubuntu.sh
@@ -127,27 +127,6 @@
 		printf "\tsecp256k1 found\n"
 	fi
 	
-	printf "\n\tChecking for binaryen\n"
-	if [ ! -d ${HOME}/opt/binaryen ]; then
-		# Install binaryen v1.37.14:
-		printf "\tInstalling binaryen v1.37.14:\n"
-		cd ${TEMP_DIR}
-		git clone https://github.com/WebAssembly/binaryen
-		cd binaryen
-		git checkout tags/1.37.14
-		cmake . && make -j${CPU_CORE}
-		if [ $? -ne 0 ]; then
-			printf "\tError compiling binaryen.\n"
-			printf "\tExiting now.\n\n"
-			exit;
-		fi
-		mkdir -p ${HOME}/opt/binaryen/ 2>/dev/null
-		mv ${TEMP_DIR}/binaryen/bin ${HOME}/opt/binaryen/
-		rm -rf ${TEMP_DIR}/binaryen
-	else
-		printf "\tBinaryen found at ${HOME}/opt/binaryen\n"
-	fi
-	
 	printf "\n\tChecking for LLVM with WASM support.\n"
 	if [ ! -d ${HOME}/opt/wasm/bin ]; then
 		# Build LLVM and clang for WASM:
diff --git a/tools/eosiocpp.in b/tools/eosiocpp.in
index 4664ecfc0fd..8a55ed0c034 100755
--- a/tools/eosiocpp.in
+++ b/tools/eosiocpp.in
@@ -40,8 +40,8 @@ function build_contract {
     @WASM_LLVM_LINK@ -o $workdir/linked.bc $workdir/built/*
 #    echo @WASM_LLC@ --asm-verbose=false -o $workdir/assembly.s $workdir/linked.bc
     @WASM_LLC@ --asm-verbose=false -o $workdir/assembly.s $workdir/linked.bc
-#  echo @BINARYEN_BIN@/s2wasm -o $outname -s 16384 $workdir/assembly.s
-    @BINARYEN_BIN@/s2wasm -o $outname -s 16384 $workdir/assembly.s
+#  echo ${EOSIO_INSTALL_DIR}/bin/eosio-s2wasm -o $outname -s 16384 $workdir/assembly.s
+    ${EOSIO_INSTALL_DIR}/bin/eosio-s2wasm -o $outname -s 16384 $workdir/assembly.s
 
 #    echo rm -rf $workdir
     rm -rf $workdir