Index: config/FindPythonLibrary.cmake
===================================================================
--- config/FindPythonLibrary.cmake	(revision 34658)
+++ config/FindPythonLibrary.cmake	(working copy)
@@ -31,10 +31,15 @@
   set(PYTHONLIBRARY_FOUND TRUE)
 else(EXISTS PYTHON_LIBRARY)
 
-  FIND_PACKAGE(PythonInterp)
+  EXECUTE_PROCESS(COMMAND which python OUTPUT_VARIABLE PYTHON_WHICH)
+  STRING(REGEX REPLACE "(.*)\n" "\\1" PYTHON_EXECUTABLE ${PYTHON_WHICH})
+  if(PYTHON_EXECUTABLE STREQUAL "")
+    FIND_PACKAGE(PythonInterp)
+  else(PYTHON_EXECUTABLE STREQUAL "")
+    set(PYTHONINTERP_FOUND TRUE)
+  endif(PYTHON_EXECUTABLE STREQUAL "")
 
   if(PYTHONINTERP_FOUND)
-
     FIND_FILE(_find_lib_python_py FindLibPython.py PATHS ${CMAKE_MODULE_PATH})
 
     EXECUTE_PROCESS(COMMAND ${PYTHON_EXECUTABLE}  ${_find_lib_python_py} OUTPUT_VARIABLE python_config)