From 21955af0e5a30f0cabbdf128cb27acc1ea6c28c4 Mon Sep 17 00:00:00 2001
From: Kefu Chai <tchaikov@gmail.com>
Date: Fri, 12 Oct 2018 18:10:07 +0800
Subject: doc: build use python3

use python3 as an alternative of python (python2)
---
 doc/CMakeLists.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/doc/CMakeLists.txt b/doc/CMakeLists.txt
index 66b4bd1..87ad9ec 100644
--- a/doc/CMakeLists.txt
+++ b/doc/CMakeLists.txt
@@ -4,11 +4,13 @@ if (NOT DOXYGEN)
   return ()
 endif ()
 
+find_package(PythonInterp
+  QUIET REQUIRED)
 find_program(SPHINX_EXECUTABLE
   NAMES sphinx-build sphinx-build-3)
 add_custom_target(doc
   COMMAND ${CMAKE_COMMAND} -E env SPHINX_EXECUTABLE=${SPHINX_EXECUTABLE}
-    ${CMAKE_CURRENT_SOURCE_DIR}/build.py ${FMT_VERSION}
+    ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/build.py ${FMT_VERSION}
   SOURCES api.rst syntax.rst build.py conf.py _templates/layout.html)
 
 install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/html/
-- 
2.19.1