i#2626: Force python3 for aarch64 codec gen (#6914)

Previously we selected the default python interpreter to run the codec
this *usually* found python3 but on some systems would resolve to
python2 and cause the codec generator to fail. This change enforces
python3 as a requirement

issue: #2626

core/ir/aarch64/codec.py

@@ -1,8 +1,8 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 # **********************************************************
 # Copyright (c) 2021 Google, Inc.   All rights reserved.
-# Copyright (c) 2016 - 2023 ARM Limited. All rights reserved.
+# Copyright (c) 2016 - 2024 ARM Limited. All rights reserved.
 # **********************************************************
 
 # Redistribution and use in source and binary forms, with or without

make/CMake_aarch64_gen_codec.cmake

@@ -1,6 +1,6 @@
 # **********************************************************
 # Copyright (c) 2020-2021 Google, Inc.   All rights reserved.
-# Copyright (c) 2018-2022 Arm Limited    All rights reserved.
+# Copyright (c) 2018-2024 Arm Limited    All rights reserved.
 # **********************************************************
 
 # Redistribution and use in source and binary forms, with or without
@@ -30,9 +30,9 @@
 # DAMAGE.
 
 # Commands to automatically create the codec files from core/arch/aarch64/codec.txt.
-find_package(PythonInterp)
+find_package(Python3)
 
-if (NOT PYTHONINTERP_FOUND)
+if (NOT PYTHON3_FOUND)
   message(FATAL_ERROR "Python interpreter not found")
 endif ()
 
@@ -63,7 +63,7 @@ set(AARCH64_CODEC_GEN_SRCS
 set_source_files_properties(${AARCH64_CODEC_GEN_SRCS} PROPERTIES GENERATED true)
 
 execute_process(
-  COMMAND ${PYTHON_EXECUTABLE}
+  COMMAND ${PYTHON3_EXECUTABLE}
           "${PROJECT_SOURCE_DIR}/make/aarch64_check_codec_order.py"
           "${PROJECT_SOURCE_DIR}/core/ir/aarch64"
           "${PROJECT_BINARY_DIR}"
@@ -91,7 +91,7 @@ add_custom_command(
           ${PROJECT_SOURCE_DIR}/core/ir/${ARCH_NAME}/codec_v87.txt
           ${PROJECT_SOURCE_DIR}/core/ir/${ARCH_NAME}/codec_sve.txt
           ${PROJECT_SOURCE_DIR}/core/ir/${ARCH_NAME}/codec_sve2.txt
-  COMMAND ${PYTHON_EXECUTABLE}
+  COMMAND ${PYTHON3_EXECUTABLE}
   ARGS ${PROJECT_SOURCE_DIR}/core/ir/${ARCH_NAME}/codec.py
        ${PROJECT_SOURCE_DIR}/core/ir/${ARCH_NAME}
        ${PROJECT_BINARY_DIR}

make/aarch64_check_codec_order.py

@@ -1,7 +1,7 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # **********************************************************
-# Copyright (c) 2022-2023 Arm Limited    All rights reserved.
+# Copyright (c) 2022-2024 Arm Limited    All rights reserved.
 # **********************************************************
 
 # Redistribution and use in source and binary forms, with or without