CMake: fixed configure of application if TUTTLE_PYTHON_VERSION is not set

Author: Clement Champetier

applications/CMakeLists.txt

@@ -5,14 +5,16 @@ add_subdirectory(sam)
 add_subdirectory(script)
 
 # Edit python scripts if the host is built with python3
-if(${TUTTLE_PYTHON_VERSION} VERSION_GREATER "3")
-    set(BASH_PYTHON2 "#!/usr/bin/env python")
-    set(BASH_PYTHON3 "#!/usr/bin/env python3")
+if(DEFINED TUTTLE_PYTHON_VERSION)
+    if(${TUTTLE_PYTHON_VERSION} VERSION_GREATER "3")
+        set(BASH_PYTHON2 "#!/usr/bin/env python")
+        set(BASH_PYTHON3 "#!/usr/bin/env python3")
 
-    file(GLOB_RECURSE PYTHON_APPS sam/*.py script/*.py)
-    foreach(PYTHON_APP ${PYTHON_APPS})
-        file(READ "${PYTHON_APP}" APP_CONTENT_PYTHON2)
-        string(REGEX REPLACE ${BASH_PYTHON2} ${BASH_PYTHON3} APP_CONTENT_PYTHON3  "${APP_CONTENT_PYTHON2}" )
-        file(WRITE "${PYTHON_APP}" "${APP_CONTENT_PYTHON3}")
-    endforeach()
+        file(GLOB_RECURSE PYTHON_APPS sam/*.py script/*.py)
+        foreach(PYTHON_APP ${PYTHON_APPS})
+            file(READ "${PYTHON_APP}" APP_CONTENT_PYTHON2)
+            string(REGEX REPLACE ${BASH_PYTHON2} ${BASH_PYTHON3} APP_CONTENT_PYTHON3  "${APP_CONTENT_PYTHON2}" )
+            file(WRITE "${PYTHON_APP}" "${APP_CONTENT_PYTHON3}")
+        endforeach()
+    endif()
 endif()