applications: Export TgaxVideoTraffic symbols for MSVC/ClangCL compatibility

Author: Gabrielcarvfer

src/applications/CMakeLists.txt

@@ -69,4 +69,5 @@ build_lib(
     test/tgax-voip-traffic-test-suite.cc
     test/tgax-virtual-desktop-test-suite.cc
     test/rta-tig-mobile-gaming-test-suite.cc
+  GENERATE_EXPORT_HEADER
 )

src/applications/model/tgax-video-traffic.h

@@ -11,6 +11,7 @@
 
 #include "source-application.h"
 
+#include "ns3/applications-export.h"
 #include "ns3/data-rate.h"
 #include "ns3/event-id.h"
 #include "ns3/traced-callback.h"
@@ -33,7 +34,7 @@ class GammaRandomVariable;
  * 802.11-14/0571r12 - 11ax Evaluation Methodology (see applications documentation for
  * full citation).
  */
-class TgaxVideoTraffic : public SourceApplication
+class APPLICATIONS_EXPORT TgaxVideoTraffic : public SourceApplication
 {
   public:
     /**