diff --git a/CMakeLists.txt b/CMakeLists.txt
index ce5cbe2c..d01726fd 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,11 @@ cmake_minimum_required (VERSION 3.2)
 
 project (DROGON CXX)
 message (STATUS "os:" ${CMAKE_SYSTEM_NAME})
-IF (CMAKE_SYSTEM_NAME MATCHES "Linux")
+if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+#Clang, use c++17
+    set(CMAKE_CXX_STD_FLAGS c++17)
+    set(CXX_STD 17)
+else()
     EXEC_PROGRAM (gcc ARGS "--version | grep '^gcc'|awk '{print $3}' | sed s'/)//g' | sed s'/-.*//g'" OUTPUT_VARIABLE version)
     MESSAGE(STATUS "This is gcc version:: " ${version})
     if(version LESS 5.4.0)
@@ -17,10 +21,6 @@ IF (CMAKE_SYSTEM_NAME MATCHES "Linux")
         set(CXX_STD 17)
         MESSAGE(STATUS "c++17")
     endif()
-else()
-#MacOS use c++17
-    set(CMAKE_CXX_STD_FLAGS c++17)
-    set(CXX_STD 17)
 endif()
 
 include_directories(${PROJECT_SOURCE_DIR}/trantor ${PROJECT_SOURCE_DIR}/lib/inc ${PROJECT_SOURCE_DIR}/orm_lib/inc)
@@ -161,14 +161,16 @@ else()
     file(APPEND "${CONFIG_HEADER}" "#define USE_ORM 0\n")
 endif()
 
-
-
 string(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_LOWER)
 if(CMAKE_BUILD_TYPE_LOWER STREQUAL release)
-    file(APPEND "${CONFIG_HEADER}" "\n" "const char compileFlags[]=\"" ${CMAKE_CXX_FLAGS_RELEASE} "\";")
+    file(APPEND "${CONFIG_HEADER}" "\n" "const char compileFlags[] = \"" ${CMAKE_CXX_FLAGS_RELEASE} "\";\n")
 else()
-    file(APPEND "${CONFIG_HEADER}" "\n" "const char compileFlags[]=\"" ${CMAKE_CXX_FLAGS_DEBUG} "\";")
+    file(APPEND "${CONFIG_HEADER}" "\n" "const char compileFlags[] = \"" ${CMAKE_CXX_FLAGS_DEBUG} "\";\n")
 endif()
+
+file(APPEND "${CONFIG_HEADER}" "const char compilerCommand[] = \"${CMAKE_CXX_COMPILER}\";\n")
+file(APPEND "${CONFIG_HEADER}" "const char compilerId[] = \"${CMAKE_CXX_COMPILER_ID}\";\n")
+
 get_target_property(INS drogon INCLUDE_DIRECTORIES)
 
 file(APPEND "${CONFIG_HEADER}" "\nconst char includeDirs[]=\"")
diff --git a/lib/src/DrClassMap.cc b/lib/src/DrClassMap.cc
index ebe086cb..d65d3236 100755
--- a/lib/src/DrClassMap.cc
+++ b/lib/src/DrClassMap.cc
@@ -14,10 +14,10 @@
 
 #include <drogon/DrClassMap.h>
 #include <drogon/DrObject.h>
-#include <iostream>
+#include <trantor/utils/Logger.h>
+
 using namespace drogon;
-//std::map <std::string,DrAllocFunc> * DrClassMap::classMap=nullptr;
-//std::once_flag DrClassMap::flag;
+
 namespace drogon
 {
 namespace internal
@@ -40,6 +40,7 @@ static std::mutex &getMapMutex()
 
 void DrClassMap::registerClass(const std::string &className, const DrAllocFunc &func)
 {
+    LOG_TRACE << "Register class:" << className;
     getMap().insert(std::make_pair(className, func));
 }
 
diff --git a/lib/src/HttpResponseImpl.cc b/lib/src/HttpResponseImpl.cc
index 8a9cf47b..c13ca6e2 100755
--- a/lib/src/HttpResponseImpl.cc
+++ b/lib/src/HttpResponseImpl.cc
@@ -48,7 +48,7 @@ HttpResponsePtr HttpResponse::newHttpJsonResponse(const Json::Value &data)
 HttpResponsePtr HttpResponse::newNotFoundResponse()
 {
     auto &resp = HttpAppFrameworkImpl::instance().getCustom404Page();
-    if(resp)
+    if (resp)
     {
         return resp;
     }
@@ -64,8 +64,6 @@ HttpResponsePtr HttpResponse::newNotFoundResponse()
         });
         return notFoundResp;
     }
-    
-   
 }
 HttpResponsePtr HttpResponse::newLocationRedirectResponse(const std::string &path)
 {
diff --git a/lib/src/SharedLibManager.cc b/lib/src/SharedLibManager.cc
index 0a79b601..735d50e0 100755
--- a/lib/src/SharedLibManager.cc
+++ b/lib/src/SharedLibManager.cc
@@ -110,9 +110,9 @@ void SharedLibManager::managerLibs()
                             return;
                     }
 
-                    //                    {
-                    //                        std::ofstream fout(lockFile);
-                    //                    }
+                    {
+                        std::ofstream fout(lockFile);
+                    }
                     std::string cmd = "drogon_ctl create view ";
                     cmd.append(filename).append(" -o ").append(libPath);
                     LOG_TRACE << cmd;
@@ -150,13 +150,23 @@ void SharedLibManager::managerLibs()
 void *SharedLibManager::loadLibs(const std::string &sourceFile, void *oldHld)
 {
     LOG_TRACE << "src:" << sourceFile;
-    std::string cmd = "g++ ";
-    cmd.append(sourceFile).append(" ").append(compileFlags).append(" ").append(includeDirs).append(" -shared -fPIC --no-gnu-unique -o ");
-    auto pos = sourceFile.rfind(".");
+    std::string cmd = compilerCommand;
+    auto pos = cmd.rfind("/");
+    if (pos != std::string::npos)
+    {
+        cmd = cmd.substr(pos + 1);
+    }
+    cmd.append(" ").append(sourceFile).append(" ").append(compileFlags).append(" ").append(includeDirs);
+    if (std::string(compilerId).find("Clang") != std::string::npos)
+        cmd.append(" -shared -fPIC -undefined dynamic_lookup -o ");
+    else
+        cmd.append(" -shared -fPIC --no-gnu-unique -o ");
+    pos = sourceFile.rfind(".");
     auto soFile = sourceFile.substr(0, pos);
     soFile.append(".so");
     cmd.append(soFile);
     void *Handle = nullptr;
+    LOG_TRACE << cmd;
     if (system(cmd.c_str()) == 0)
     {
         LOG_TRACE << "Compiled successfully";