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#----------------------------------------------------------------------------
# SPDX-FileCopyrightText: Copyright 2021 - 2022 Arm Limited and/or its affiliates <open-source-office@arm.com>
# SPDX-License-Identifier: Apache-2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#----------------------------------------------------------------------------
if (DEFINED ENV{CMAKE_BUILD_PARALLEL_LEVEL})
set(PARALLEL_JOBS $ENV{CMAKE_BUILD_PARALLEL_LEVEL})
else()
include(ProcessorCount)
ProcessorCount(PARALLEL_JOBS)
endif()
if (CMAKE_BUILD_TYPE STREQUAL Debug)
set(TENSORFLOW_LITE_MICRO_CORE_OPTIMIZATION_LEVEL "-O0")
set(TENSORFLOW_LITE_MICRO_KERNEL_OPTIMIZATION_LEVEL "-O0")
elseif (CMAKE_BUILD_TYPE STREQUAL Release)
set(TENSORFLOW_LITE_MICRO_CORE_OPTIMIZATION_LEVEL "-O3")
set(TENSORFLOW_LITE_MICRO_KERNEL_OPTIMIZATION_LEVEL "-O3")
endif()
assert_defined(TENSORFLOW_LITE_MICRO_BUILD_TYPE)
assert_defined(TENSORFLOW_LITE_MICRO_CLEAN_DOWNLOADS)
assert_defined(TENSORFLOW_LITE_MICRO_CLEAN_BUILD)
if (CMAKE_CXX_COMPILER_ID STREQUAL "ARMClang")
set(TENSORFLOW_LITE_MICRO_TOOLCHAIN "armclang")
elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
set(TENSORFLOW_LITE_MICRO_TOOLCHAIN "gcc")
else ()
message(FATAL_ERROR "No compiler ID is set")
endif()
get_filename_component(TENSORFLOW_LITE_MICRO_TARGET_TOOLCHAIN_ROOT ${CMAKE_C_COMPILER} DIRECTORY)
set(TENSORFLOW_LITE_MICRO_TARGET_TOOLCHAIN_ROOT "${TENSORFLOW_LITE_MICRO_TARGET_TOOLCHAIN_ROOT}/")
set(TENSORFLOW_LITE_MICRO_PATH "${TENSORFLOW_SRC_PATH}/tensorflow/lite/micro")
set(TENSORFLOW_LITE_MICRO_GENDIR ${CMAKE_CURRENT_BINARY_DIR}/tensorflow/)
set(TENSORFLOW_LITE_MICRO_PLATFORM_LIB_NAME "libtensorflow-microlite.a")
if (TARGET_PLATFORM STREQUAL native)
set(TENSORFLOW_LITE_MICRO_TARGET "linux")
set(TENSORFLOW_LITE_MICRO_TARGET_ARCH x86_64)
else()
set(TENSORFLOW_LITE_MICRO_TARGET "cortex_m_generic")
if ("${CMAKE_SYSTEM_ARCH}" STREQUAL "armv8.1-m.main")
set(TENSORFLOW_LITE_MICRO_TARGET_ARCH "cortex-m55")
else()
set(TENSORFLOW_LITE_MICRO_TARGET_ARCH "${CMAKE_SYSTEM_PROCESSOR}")
endif()
if(ETHOS_U_NPU_ENABLED)
# Arm Ethos-U55 NPU is the co-processor for ML workload:
set(TENSORFLOW_LITE_MICRO_CO_PROCESSOR "ethos_u")
set(ETHOS_U_NPU_ID "u55") # Currently only u55 is supported by TFLite Micro.
endif()
set(TENSORFLOW_LITE_MICRO_OPTIMIZED_KERNEL "cmsis_nn")
endif()
if (TENSORFLOW_LITE_MICRO_CLEAN_DOWNLOADS)
list(APPEND MAKE_TARGETS_LIST "clean_downloads")
endif()
if (TENSORFLOW_LITE_MICRO_CLEAN_BUILD)
list(APPEND MAKE_TARGETS_LIST "clean")
endif()
# Primary target
list(APPEND MAKE_TARGETS_LIST "microlite")
message(STATUS "TensorFlow Lite Micro build to be called for these targets: ${MAKE_TARGETS_LIST}")
# Add virtual environment's Python directory path to the system path.
# NOTE: This path is passed to the TensorFlow Lite Micro's make env
# as it depends on some basic Python packages (like Pillow) installed
# and the system-wide Python installation might not have them.
set(ENV_PATH "${PYTHON_VENV}/bin:$ENV{PATH}")
# Commands and targets
add_custom_target(tensorflow_build ALL
# Command to build the TensorFlow Lite Micro library
COMMAND ${CMAKE_COMMAND} -E env PATH=${ENV_PATH}
make -j${PARALLEL_JOBS} -f ${TENSORFLOW_LITE_MICRO_PATH}/tools/make/Makefile ${MAKE_TARGETS_LIST}
TARGET_TOOLCHAIN_ROOT=${TENSORFLOW_LITE_MICRO_TARGET_TOOLCHAIN_ROOT}
TOOLCHAIN=${TENSORFLOW_LITE_MICRO_TOOLCHAIN}
GENDIR=${TENSORFLOW_LITE_MICRO_GENDIR}
TARGET=${TENSORFLOW_LITE_MICRO_TARGET}
TARGET_ARCH=${TENSORFLOW_LITE_MICRO_TARGET_ARCH}
BUILD_TYPE=${TENSORFLOW_LITE_MICRO_BUILD_TYPE}
CMSIS_PATH=${CMSIS_SRC_PATH}
# Conditional arguments
$<$<BOOL:${ETHOS_U_NPU_ENABLED}>:ETHOSU_ARCH=${ETHOS_U_NPU_ID}>
$<$<BOOL:${ETHOS_U_NPU_ENABLED}>:ETHOSU_DRIVER_PATH=${ETHOS_U_NPU_DRIVER_SRC_PATH}>
$<$<BOOL:${ETHOS_U_NPU_ENABLED}>:ETHOSU_DRIVER_LIBS=$<TARGET_FILE:ethosu_core_driver>>
$<$<BOOL:${TENSORFLOW_LITE_MICRO_CORE_OPTIMIZATION_LEVEL}>:CORE_OPTIMIZATION_LEVEL=${TENSORFLOW_LITE_MICRO_CORE_OPTIMIZATION_LEVEL}>
$<$<BOOL:${TENSORFLOW_LITE_MICRO_KERNEL_OPTIMIZATION_LEVEL}>:KERNEL_OPTIMIZATION_LEVEL=${TENSORFLOW_LITE_MICRO_KERNEL_OPTIMIZATION_LEVEL}>
$<$<BOOL:${TENSORFLOW_LITE_MICRO_OPTIMIZED_KERNEL}>:OPTIMIZED_KERNEL_DIR=${TENSORFLOW_LITE_MICRO_OPTIMIZED_KERNEL}>
$<$<BOOL:${TENSORFLOW_LITE_MICRO_CO_PROCESSOR}>:CO_PROCESSOR=${TENSORFLOW_LITE_MICRO_CO_PROCESSOR}>
# Command to copy over the generated library to the local build tree.
COMMAND ${CMAKE_COMMAND} -E copy ${TENSORFLOW_LITE_MICRO_GENDIR}/lib/${TENSORFLOW_LITE_MICRO_PLATFORM_LIB_NAME}
${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${TENSORFLOW_LITE_MICRO_PLATFORM_LIB_NAME}
COMMENT "Building TensorFlow Lite Micro library..."
BYPRODUCTS ${TENSORFLOW_SRC_PATH}/tensorflow/tensorflow/lite/micro/tools/make/downloads
${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${TENSORFLOW_LITE_MICRO_PLATFORM_LIB_NAME}
${TENSORFLOW_LITE_MICRO_GENDIR}/lib/${TENSORFLOW_LITE_MICRO_PLATFORM_LIB_NAME}
WORKING_DIRECTORY ${TENSORFLOW_SRC_PATH})
# Create library
set(TENSORFLOW_LITE_MICRO_TARGET tensorflow-lite-micro)
add_library(${TENSORFLOW_LITE_MICRO_TARGET} STATIC IMPORTED)
if(ETHOS_U_NPU_ENABLED)
add_dependencies(tensorflow_build ethosu_core_driver)
endif()
add_dependencies(tensorflow-lite-micro tensorflow_build)
set_property(TARGET tensorflow-lite-micro PROPERTY IMPORTED_LOCATION
"${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${TENSORFLOW_LITE_MICRO_PLATFORM_LIB_NAME}")
target_include_directories(tensorflow-lite-micro
INTERFACE
${TENSORFLOW_SRC_PATH})
target_compile_definitions(tensorflow-lite-micro
INTERFACE
TF_LITE_STATIC_MEMORY)
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