Python: bump minimum version to 3.10

Since Python 3.10 is now supported on all platform,
bump the minimum version to reduce the number of Python versions that
need to be supported simultaneously.

Reviewed By: LazyDodo, sybren, mont29, brecht

Ref D13943

CMakeLists.txt

@@ -906,8 +906,8 @@ if(WITH_PYTHON)
   # Do this before main 'platform_*' checks,
   # because UNIX will search for the old Python paths which may not exist.
   # giving errors about missing paths before this case is met.
-  if(DEFINED PYTHON_VERSION AND "${PYTHON_VERSION}" VERSION_LESS "3.9")
-    message(FATAL_ERROR "At least Python 3.9 is required to build, but found Python ${PYTHON_VERSION}")
+  if(DEFINED PYTHON_VERSION AND "${PYTHON_VERSION}" VERSION_LESS "3.10")
+    message(FATAL_ERROR "At least Python 3.10 is required to build, but found Python ${PYTHON_VERSION}")
   endif()
 
   file(GLOB RESULT "${CMAKE_SOURCE_DIR}/release/scripts/addons")

build_files/build_environment/install_deps.sh

@@ -381,7 +381,7 @@ CLANG_FORMAT_VERSION_MEX="10.0"
 
 PYTHON_VERSION="3.10.2"
 PYTHON_VERSION_SHORT="3.10"
-PYTHON_VERSION_MIN="3.9"
+PYTHON_VERSION_MIN="3.10"
 PYTHON_VERSION_MEX="3.12"
 PYTHON_VERSION_INSTALLED=$PYTHON_VERSION_SHORT
 PYTHON_FORCE_BUILD=false

source/blender/python/intern/bpy_capi_utils.h

@@ -20,8 +20,8 @@
 
 #pragma once
 
-#if PY_VERSION_HEX < 0x03090000
-#  error "Python 3.9 or greater is required, you'll need to update your Python."
+#if PY_VERSION_HEX < 0x030a0000
+#  error "Python 3.10 or greater is required, you'll need to update your Python."
 #endif
 
 #ifdef __cplusplus

source/blender/python/mathutils/mathutils.c

@@ -90,11 +90,7 @@ Py_hash_t mathutils_array_hash(const float *array, size_t array_len)
   x = 0x345678UL;
   i = 0;
   while (--len >= 0) {
-#if PY_VERSION_HEX >= 0x30a0000 /* Version: 3.10. */
     y = _Py_HashDouble(NULL, (double)(array[i++]));
-#else
-    y = _Py_HashDouble((double)(array[i++]));
-#endif
     if (y == -1) {
       return -1;
     }