add missing export variable (#102)

Add CLASS_LOADER_PUBLIC to ClassLoader::has_unmananged_instance_been_created_ or it won't build on Windows

Author: johnsonshih

CMakeLists.txt

@@ -56,7 +56,12 @@ set(${PROJECT_NAME}_HDRS
   include/class_loader/multi_library_class_loader.hpp
   include/class_loader/register_macro.hpp
 )
-add_library(${PROJECT_NAME} ${${PROJECT_NAME}_SRCS} ${${PROJECT_NAME}_HDRS})
+if(WIN32)
+  add_library(${PROJECT_NAME} SHARED ${${PROJECT_NAME}_SRCS} ${${PROJECT_NAME}_HDRS})
+else()
+  add_library(${PROJECT_NAME} ${${PROJECT_NAME}_SRCS} ${${PROJECT_NAME}_HDRS})
+endif()
+
 target_link_libraries(${PROJECT_NAME} ${Boost_LIBRARIES} ${console_bridge_LIBRARIES} ${Poco_LIBRARIES})
 if(WIN32)
   # Causes the visibility macros to use dllexport rather than dllimport

include/class_loader/class_loader.hpp

@@ -330,6 +330,8 @@ class ClassLoader
   boost::recursive_mutex load_ref_count_mutex_;
   int plugin_ref_count_;
   boost::recursive_mutex plugin_ref_count_mutex_;
+
+  CLASS_LOADER_PUBLIC
   static bool has_unmananged_instance_been_created_;
 };
 

include/class_loader/meta_object.hpp

@@ -36,6 +36,8 @@
 #define CLASS_LOADER__META_OBJECT_HPP_
 
 #include <console_bridge/console.h>
+#include "class_loader/visibility_control.hpp"
+
 #include <typeinfo>
 #include <string>
 #include <vector>
@@ -54,7 +56,7 @@ typedef std::vector<class_loader::ClassLoader *> ClassLoaderVector;
  * @class AbstractMetaObjectBase
  * @brief A base class for MetaObjects that excludes a polymorphic type parameter. Subclasses are class templates though.
  */
-class AbstractMetaObjectBase
+class CLASS_LOADER_PUBLIC AbstractMetaObjectBase
 {
 public:
   /**