Use iostream stuff to ensure stdlibc++ linking is ok.

manual tests/3 standalone binaries/myapp.cpp

@@ -1,10 +1,14 @@
 #include<SDL.h>
 #include<memory>
+#include<iostream>
+#include<string>
 
 int main(int argc, char **argv) {
   SDL_Surface *screenSurface;
   SDL_Event e;
   int keepGoing = 1;
+  std::string message;
+
   if(SDL_Init( SDL_INIT_VIDEO ) < 0) {
     printf( "SDL could not initialize! SDL_Error: %s\n", SDL_GetError() );
   }
@@ -13,6 +17,12 @@ int main(int argc, char **argv) {
   std::unique_ptr<SDL_Window, void(*)(SDL_Window*)> window(SDL_CreateWindow( "My application", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 640, 480, SDL_WINDOW_SHOWN), SDL_DestroyWindow);
   screenSurface = SDL_GetWindowSurface(window.get());
 
+  // Use iostream etc to make sure we have not screwed
+  // up libstdc++ linking.
+  message = "Window created.";
+  message += " Starting main loop.";
+  std::cout << message << std::endl;
+
   while(keepGoing) {
     while(SDL_PollEvent(&e) != 0) {
       if(e.type == SDL_QUIT) {