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Diffstat (limited to 'external/nanopb/nanopb.cmake')
-rw-r--r-- | external/nanopb/nanopb.cmake | 294 |
1 files changed, 294 insertions, 0 deletions
diff --git a/external/nanopb/nanopb.cmake b/external/nanopb/nanopb.cmake new file mode 100644 index 000000000..eda00e4a1 --- /dev/null +++ b/external/nanopb/nanopb.cmake @@ -0,0 +1,294 @@ +#------------------------------------------------------------------------------- +# Copyright (c) 2020, Arm Limited and Contributors. All rights reserved. +# +# SPDX-License-Identifier: BSD-3-Clause +# +#------------------------------------------------------------------------------- + +#[===[.rst: +NonoPB integration for cmake +---------------------------- + +This module will: + - download nanopb if not available locally + - build the runtime static library and the generator + - import the static library to the build + - define a function to provide access to the generator + +Note: the python module created by the generator build will be installed under +Python_SITELIB ("Third-party platform independent installation directory.") +This means the build may alter the state of your system. Please use virtualenv. + +Note: see requirements.txt for dependnecies which need to be installed before +running this module. + +#]===] + +#### Get the dependency + +set(NANOPB_URL "https://github.com/nanopb/nanopb.git" CACHE STRING "nanopb repository URL") +set(NANOPB_REFSPEC "nanopb-0.4.2" CACHE STRING "nanopb git refspec") +set(NANOPB_INSTALL_PATH "${CMAKE_CURRENT_BINARY_DIR}/nanopb_install" CACHE PATH "nanopb installation directory") +set(NANOPB_PACKAGE_PATH "${NANOPB_INSTALL_PATH}/libnanopb/cmake" CACHE PATH "nanopb CMake package directory") + +include(FetchContent) + +# Checking git +find_program(GIT_COMMAND "git") +if (NOT GIT_COMMAND) + message(FATAL_ERROR "Please install git") +endif() + +# Fetching nanopb +FetchContent_Declare( + nanopb + GIT_REPOSITORY ${NANOPB_URL} + GIT_TAG ${NANOPB_REFSPEC} + GIT_SHALLOW TRUE + #See the .patch file for details on why it is needed. + PATCH_COMMAND git stash + COMMAND git apply ${CMAKE_CURRENT_LIST_DIR}/fix-pyhon-name.patch +) + +# FetchContent_GetProperties exports nanopb_SOURCE_DIR and nanopb_BINARY_DIR variables +FetchContent_GetProperties(nanopb) +if(NOT nanopb_POPULATED) + message(STATUS "Fetching nanopb") + FetchContent_Populate(nanopb) +endif() + +#### Build the runtime and the generator. +if( NOT CMAKE_CROSSCOMPILING) + execute_process(COMMAND + ${CMAKE_COMMAND} + -DBUILD_SHARED_LIBS=Off + -DBUILD_STATIC_LIBS=On + -Dnanopb_BUILD_RUNTIME=On + -Dnanopb_BUILD_GENERATOR=On + -Dnanopb_PROTOC_PATH=${nanopb_SOURCE_DIR}/generator/protoc + -Dnanopb_MSVC_STATIC_RUNTIME=Off + -DCMAKE_INSTALL_PREFIX=${NANOPB_INSTALL_PATH} + -DCMAKE_TOOLCHAIN_FILE=${TS_EXTERNAL_LIB_TOOLCHAIN_FILE} + -GUnix\ Makefiles + ${nanopb_SOURCE_DIR} + WORKING_DIRECTORY + ${nanopb_BINARY_DIR} + RESULT_VARIABLE _exec_error + ) +else() + execute_process(COMMAND + ${CMAKE_COMMAND} + -DBUILD_SHARED_LIBS=Off + -DBUILD_STATIC_LIBS=On + -Dnanopb_BUILD_RUNTIME=On + -Dnanopb_BUILD_GENERATOR=On + -Dnanopb_PROTOC_PATH=${nanopb_SOURCE_DIR}/generator/protoc + -Dnanopb_MSVC_STATIC_RUNTIME=Off + -DCMAKE_INSTALL_PREFIX=${NANOPB_INSTALL_PATH} + -DCMAKE_TOOLCHAIN_FILE=${TS_EXTERNAL_LIB_TOOLCHAIN_FILE} + -DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY + -GUnix\ Makefiles + ${nanopb_SOURCE_DIR} + WORKING_DIRECTORY + ${nanopb_BINARY_DIR} + RESULT_VARIABLE _exec_error + ) +endif() + +if (_exec_error) + message(FATAL_ERROR "Configuration step of nanopb runtime failed with ${_exec_error}.") +endif() + +execute_process(COMMAND + ${CMAKE_COMMAND} --build ${nanopb_BINARY_DIR} -- install -j8 + RESULT_VARIABLE _exec_error + ) +if (_exec_error) + message(FATAL_ERROR "Build step of nanopb runtime failed with ${_exec_error}.") +endif() + +#### Include Nanopb runtime in the build. +find_package(Nanopb + PATHS "${NANOPB_INSTALL_PATH}" + NO_DEFAULT_PATH + ) + +#### Build access to the protobuf compiler +#TODO: verify protoc dependencies: python3-protobuf +find_package(Python3 COMPONENTS Interpreter) + +if (NOT Python3_Interpreter_FOUND) + message(FATAL_ERROR "Failed to find python3 interpreter.") +endif() + +find_file(NANOPB_GENERATOR_PATH + NAMES nanopb_generator.py + PATHS ${nanopb_SOURCE_DIR}/generator + DOC "nanopb protobuf compiler" + NO_DEFAULT_PATH + ) + +if (NOT NANOPB_GENERATOR_PATH) + message(FATAL_ERROR "Nanopb generator was not found!") +endif() + +#[===[.rst: +.. cmake:command:: protobuf_generate + + .. code-block:: cmake + + protobuf_generate(SRC file.proto + TGT foo + NAMESPACE bar + BASE_DIR "proto/definitions") + + Run the ``nanopb_generator`` to compile a protobuf definition file into C source. + Generated source file will be added to the source list of ``TGT``. Protobuf + compilation will take part before TGT+NAMESPACE is built. + + Protobuf file names added to the same TGT must not collide. + + Inputs: + + ``SRC`` + Path to of the protobuf file to process. Either absoluto or relative to the + callers location. + + ``TGT`` + Name of target to compile generated source files. + + ``NAMESPACE`` + Namespace to put generated files under. Specifies include path and allows + separating colliding protobuf files. + + ``BASE_DIR`` + Base directory. Generated files are located reletive to this base. + +#]===] +function(protobuf_generate) + set(_options ) + set(_oneValueArgs SRC TGT NAMESPACE BASE_DIR) + set(_multiValueArgs ) + + cmake_parse_arguments(PARAMS "${_options}" "${_oneValueArgs}" "${_multiValueArgs}" ${ARGN}) + + #Verify mandatory parameters + if (NOT DEFINED PARAMS_SRC) + message(FATAL_ERROR "nanopb_generate(): mandatory parameter SRC missing.") + endif() + if (NOT DEFINED PARAMS_TGT) + message(FATAL_ERROR "nanopb_generate(): mandatory parameter TGT missing.") + endif() + if (NOT DEFINED PARAMS_NAMESPACE) + message(FATAL_ERROR "nanopb_generate(): mandatory parameter NAMESPACE missing.") + endif() + if (NOT DEFINED PARAMS_BASE_DIR) + message(FATAL_ERROR "nanopb_generate(): mandatory parameter BASE_DIR missing.") + endif() + + #If SRC is not abolute make it relative to the callers location. + if (NOT IS_ABSOLUTE ${PARAMS_SRC}) + set(PARAMS_SRC "${CMAKE_CURRENT_LIST_DIR}/${PARAMS_SRC}") + endif() + + #Calculate the output directory + set(_OUT_DIR_BASE ${CMAKE_BINARY_DIR}/src/${PARAMS_NAMESPACE}) + #Calculate output file names + get_filename_component(_BASENAME ${PARAMS_SRC} NAME_WE) + + #Get relative path or SRC to BASE_DIR + file(RELATIVE_PATH _SRC_REL ${PARAMS_BASE_DIR} ${PARAMS_SRC}) + get_filename_component(_OUT_DIR_REL ${_SRC_REL} DIRECTORY ) + + #Calculate output file paths + set(_OUT_C "${_OUT_DIR_BASE}/${_OUT_DIR_REL}/${_BASENAME}.pb.c") + set(_OUT_H "${_OUT_DIR_BASE}/${_OUT_DIR_REL}/${_BASENAME}.pb.h") + + #some helper variables for the purpose of readability + set(_nanopb_target "nanopb_generate_${PARAMS_TGT}_${PARAMS_NAMESPACE}") + set(_nanopb_fake_file "nanopb_generate_ff_${PARAMS_TGT}") + + if (NOT TARGET "${_nanopb_target}") + #Create a custom target which depends on a "fake" file. + add_custom_target("${_nanopb_target}" + DEPENDS "${_nanopb_fake_file}") + #Tell cmake the dependency (source) file is fake. + set_source_files_properties("${_nanopb_fake_file}" PROPERTIES SYMBOLIC "true") + #Add a cutom command to the target to create output directory. + add_custom_command(OUTPUT "${_nanopb_fake_file}" + COMMAND ${CMAKE_COMMAND} -E make_directory ${_OUT_DIR_BASE} + COMMENT "Generating source from protobuf definitions for target ${PARAMS_TGT}") + #Ensure protobuf build happens before test target. + add_dependencies(${PARAMS_TGT} ${_nanopb_target}) + #Add include path to protobuf output. + target_include_directories(${PARAMS_TGT} PRIVATE ${_OUT_DIR_BASE}) + endif() + + #Append a protobuf generator command to the nanopb_generate target. + add_custom_command(OUTPUT "${_nanopb_fake_file}" "${_OUT_C}" "${_OUT_H}" + APPEND + COMMAND ${Python3_EXECUTABLE} ${NANOPB_GENERATOR_PATH} + -I ${PARAMS_BASE_DIR} + -D ${_OUT_DIR_BASE} + ${_SRC_REL} + DEPENDS "${PARAMS_SRC}") + + #Add generated file to the target + set_property(SOURCE "${_OUT_C}" PROPERTY GENERATED TRUE) + target_sources(${PARAMS_TGT} PRIVATE "${_OUT_C}") +endfunction() + +#[===[.rst: +.. cmake:command:: protobuf_generate_all + + .. code-block:: cmake + + protobuf_generate_all(TGT foo + NAMESPACE bar + BASE_DIR "proto/definitions") + + Generates C code from all .proto files listed in the target + property PROTOBUF_FILES. + + Inputs: + + ``TGT`` + Name of target to compile generated source files. + + ``NAMESPACE`` + Namespace to put generated files under. Specifies include path and allows + separating colliding protobuf files. + + ``BASE_DIR`` + Base directory. Generated files are located reletive to this base. + +#]===] +function(protobuf_generate_all) + set(_options ) + set(_oneValueArgs TGT NAMESPACE BASE_DIR) + set(_multiValueArgs ) + + cmake_parse_arguments(PARAMS "${_options}" "${_oneValueArgs}" "${_multiValueArgs}" ${ARGN}) + + #Verify mandatory parameters + if (NOT DEFINED PARAMS_TGT) + message(FATAL_ERROR "nanopb_generate_all(): mandatory parameter TGT missing.") + endif() + if (NOT DEFINED PARAMS_NAMESPACE) + message(FATAL_ERROR "nanopb_generate_all(): mandatory parameter NAMESPACE missing.") + endif() + if (NOT DEFINED PARAMS_BASE_DIR) + message(FATAL_ERROR "nanopb_generate_all(): mandatory parameter BASE_DIR missing.") + endif() + + get_property(_protolist TARGET ${PARAMS_TGT} PROPERTY PROTOBUF_FILES) + + #Build of each .proto file + foreach(_file IN LISTS _protolist) + protobuf_generate( + TGT ${PARAMS_TGT} + SRC "${_file}" + NAMESPACE ${PARAMS_NAMESPACE} + BASE_DIR ${PARAMS_BASE_DIR}) + endforeach() +endfunction()
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