[Server] Do not export all symbols

apps/openmw-mp/CMakeLists.txt

@@ -202,7 +202,7 @@ if (UNIX)
     target_link_libraries(tes3mp-server dl)
     # Fix for not visible pthreads functions for linker with glibc 2.15
     if(NOT APPLE)
-        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -rdynamic") # TODO: use -Wl,--dynamic-list=list.txt instead
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wl,--exclude-libs,ALL -rdynamic -fvisibility=hidden")
         target_link_libraries(tes3mp-server ${CMAKE_THREAD_LIBS_INIT})
     endif(NOT APPLE)
 endif(UNIX)

apps/openmw-mp/Script/Platform.hpp

@@ -21,7 +21,7 @@
 #define EXPORT_APIFUNCTION extern "C" __declspec(dllexport)
 #define CDECL __cdecl
 #else
-#define EXPORT_APIFUNCTION extern "C"
+#define EXPORT_APIFUNCTION extern "C" __attribute__ ((visibility ("default")))
 #define CDECL
 #endif