From 69b35f985711efc55740bc9e10567c5717e130a6 Mon Sep 17 00:00:00 2001
From: Ryan Pavlik <ryan.pavlik@collabora.com>
Date: Tue, 13 Oct 2020 16:36:33 -0500
Subject: [PATCH] build: Actually search for Python 3 interpreter before using
 it.

---
 CMakeLists.txt | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 32e7b7ed0..93237f82a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -43,6 +43,17 @@ find_package(cJSON)
 find_package(Systemd)
 find_package(OpenGLES COMPONENTS V3)
 
+if(NOT CMAKE_VERSION VERSION_LESS 3.12)
+	find_package(Python3 REQUIRED Interpreter)
+	set(PYTHON_EXECUTABLE Python3::Interpreter)
+else()
+	find_package(PythonInterp REQUIRED VERSION 3)
+	if(PYTHON_EXECUTABLE MATCHES "WindowsApps")
+		# If you hit this error, you will have to install Python 3 or try harder to tell CMake where it is.
+		message(FATAL_ERROR "Found WindowsApps alias for Python. Make sure Python3 is installed, then choose 'Manage App Execution Aliases' in Start and disable the aliases for Python.")
+	endif()
+endif()
+
 add_library(xrt-pthreads INTERFACE)
 if(WIN32)
 	find_package(pthreads_windows REQUIRED)