cmake option to use system tinyxml instead of embedded one

CMakeLists.txt

@@ -161,6 +161,19 @@ if (NOT FFMPEG_FOUND)
     message(WARNING "--------------------")
 endif (NOT FFMPEG_FOUND)
 
+# TinyXML
+option(USE_SYSTEM_TINYXML "Use system TinyXML library instead of internal." OFF)
+if(USE_SYSTEM_TINYXML)
+    find_library(TINYXML_LIBRARIES tinyxml)
+    find_path(TINYXML_INCLUDE_DIR tinyxml.h)
+    message(STATUS "Found TinyXML: ${TINYXML_LIBRARIES} ${TINYXML_INCLUDE_DIR}")
+    if(TINYXML_LIBRARIES AND TINYXML_INCLUDE_DIR)
+        include_directories(${TINYXML_INCLUDE_DIR})
+        message(STATUS "Using system TinyXML library.")
+    else()
+        message(FATAL_ERROR "Detection of system TinyXML incomplete.")
+    endif()
+endif()
 
 # Platform specific
 if (WIN32)

extern/oics/CMakeLists.txt

@@ -9,12 +9,23 @@ set(OICS_SOURCE_FILES
 	ICSInputControlSystem_keyboard.cpp
 	ICSInputControlSystem_mouse.cpp
 	ICSInputControlSystem_joystick.cpp
+)
+
+set(TINYXML_SOURCE_FILES
 	tinyxml.cpp
 	tinyxmlparser.cpp
 	tinyxmlerror.cpp
-    tinystr.cpp
+	tinystr.cpp	
 )
 
-add_library(${OICS_LIBRARY} STATIC ${OICS_SOURCE_FILES})
+if(USE_SYSTEM_TINYXML)
+    add_library(${OICS_LIBRARY} STATIC ${OICS_SOURCE_FILES})
+    target_link_libraries(${OICS_LIBRARY} ${TINYXML_LIBRARIES})
+else()
+    add_library(${OICS_LIBRARY} STATIC
+    ${OICS_SOURCE_FILES}
+    ${TINYXML_SOURCE_FILES})
+endif()
 
+# Does this do anything?
 link_directories(${CMAKE_CURRENT_BINARY_DIR})