Index: llvm/CMakeLists.txt
===================================================================
--- llvm/CMakeLists.txt
+++ llvm/CMakeLists.txt
@@ -641,8 +641,6 @@
 
 include(HandleLLVMOptions)
 
-# We support both Python 2 and 3.
-set(Python_ADDITIONAL_VERSIONS 3.7 3.6 3.5 2.7)
 include(FindPythonInterp)
 if( NOT PYTHONINTERP_FOUND )
   message(FATAL_ERROR
Index: llvm/docs/GettingStarted.rst
===================================================================
--- llvm/docs/GettingStarted.rst
+++ llvm/docs/GettingStarted.rst
@@ -598,6 +598,11 @@
 | CMAKE_INSTALL_PREFIX    | Specifies the install directory to target when     |
 |                         | running the install action of the build files.     |
 +-------------------------+----------------------------------------------------+
+| PYTHON_EXECUTABLE       | Forces CMake to use a specific Python version by   |
+|                         | passing a path to a Python interpreter. By default |
+|                         | the Python version of the interpreter in your PATH |
+|                         | is used.                                           |
++-------------------------+----------------------------------------------------+
 | LLVM_TARGETS_TO_BUILD   | A semicolon delimited list controlling which       |
 |                         | targets will be built and linked into llvm.        |
 |                         | The default list is defined as                     |