From 36c23bd5fd92ad846cdbf8b7ecd6a87b7d3efae4 Mon Sep 17 00:00:00 2001
From: Haowei Hsu <71438617+hwhsu1231@users.noreply.github.com>
Date: Thu, 18 Aug 2022 05:18:39 +0800
Subject: [PATCH] Prepare for deprecating FindPythonInterp module. (#3040)

* Prepare for deprecating FindPythonInterp module.

Since FindPythonInterp module is deprecated after CMake 3.12, it is better to start using the new FindPython module.

* Add the proper punctuation in comments.
---
 doc/CMakeLists.txt | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/doc/CMakeLists.txt b/doc/CMakeLists.txt
index 610d2bf1..fd9f4d1e 100644
--- a/doc/CMakeLists.txt
+++ b/doc/CMakeLists.txt
@@ -6,7 +6,14 @@ if (NOT DOXYGEN)
   return ()
 endif ()
 
-find_package(PythonInterp QUIET REQUIRED)
+# Find the Python interpreter and set the PYTHON_EXECUTABLE variable.
+if (CMAKE_VERSION VERSION_LESS 3.12)
+  # This logic is deprecated in CMake after 3.12.
+  find_package(PythonInterp QUIET REQUIRED)
+else ()
+  find_package(Python QUIET REQUIRED)
+  set(PYTHON_EXECUTABLE ${Python_EXECUTABLE})
+endif ()
 
 add_custom_target(doc
   COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/build.py