update cmakelists

CMakeLists.txt

@@ -66,13 +66,15 @@ include_directories(${Boost_INCLUDE_DIRS})
 
 include_directories(${CMAKE_CURRENT_SOURCE_DIR}/src/third-party/plog)
 
+set(python_version_required 3.8)
+
 if(NOT PYTHON_EXECUTABLE)
   if(BUILD_NEW_GENERATORS OR Testing OR Document)
     if(${CMAKE_VERSION} VERSION_LESS 3.12)
-      find_package(PythonInterp 3.6 REQUIRED)
+      find_package(PythonInterp ${python_version_required} REQUIRED)
       set(python_version_mm "${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}")
     else(${CMAKE_VERSION} VERSION_LESS 3.12)
-      find_package(Python3 3.6 COMPONENTS Interpreter REQUIRED)
+      find_package(Python3 ${python_version_required} COMPONENTS Interpreter REQUIRED)
       set(PYTHON_EXECUTABLE ${Python3_EXECUTABLE})
       set(python_version_mm "${Python3_VERSION_MAJOR}.${Python3_VERSION_MINOR}")
     endif(${CMAKE_VERSION} VERSION_LESS 3.12)
@@ -87,8 +89,8 @@ else()
   message(STATUS "Given Python interpreter: ${PYTHON_EXECUTABLE}")
   string(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" result "${result}")
   message(STATUS "Python version: ${result}")
-  if("${result}" VERSION_LESS 3.6)
-    message(FATAL_ERROR "Python ${result} is not supported (3.6 or later is required)")
+  if("${result}" VERSION_LESS ${python_version_required})
+    message(FATAL_ERROR "Python ${result} is not supported (${python_version_required} or later is required)")
   endif()
   string(REPLACE "." ";" result "${result}")
   set(result "${result}")