From adf705863c0ccfe0b688aa615c306836caa9687f Mon Sep 17 00:00:00 2001
From: Rolf Eike Beer <eike@sf-mail.de>
Date: Sun, 9 Sep 2012 16:08:45 +0200
Subject: [PATCH] FindSDL: add SDLMAIN_LIBRARY only once (#13262)

---
 Modules/FindSDL.cmake | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/Modules/FindSDL.cmake b/Modules/FindSDL.cmake
index 487c5d346..adaec95a2 100644
--- a/Modules/FindSDL.cmake
+++ b/Modules/FindSDL.cmake
@@ -133,10 +133,12 @@ endif()
 
 if(SDL_LIBRARY_TEMP)
   # For SDLmain
-  if(NOT SDL_BUILDING_LIBRARY)
-    if(SDLMAIN_LIBRARY)
-      set(SDL_LIBRARY_TEMP ${SDLMAIN_LIBRARY} ${SDL_LIBRARY_TEMP})
+  if(SDLMAIN_LIBRARY AND NOT SDL_BUILDING_LIBRARY)
+    list(FIND SDL_LIBRARY_TEMP "${SDLMAIN_LIBRARY}" _SDL_MAIN_INDEX)
+    if(_SDL_MAIN_INDEX EQUAL -1)
+      list(APPEND SDL_LIBRARY_TEMP "${SDLMAIN_LIBRARY}")
     endif()
+    unset(_SDL_MAIN_INDEX)
   endif()
 
   # For OS X, SDL uses Cocoa as a backend so it must link to Cocoa.