kopia lustrzana https://github.com/raspberrypi/pico-playground
Add standalone/static_sdk helper for figuring out compile/link args for external build including SDK code
graham sanderson
rodzic
d157b5cad2
commit
b4130d01c3
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Directory of standalone projects; i.e. they are not included in the main build.
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You should do a cmake build from within them
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# THIS IS A SLIGHTLY HACKY EXAMPLE PROJECT DESIGNED TO HELP YOU TOWARDS INCLUDING THE PICO SDK
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# CODE OUTSIDE OF THE CMAKE BUILD
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#
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# Note that the Pico SDK is designed to make it easy for users to build applications rather to build
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# other runtimes for the Pico.
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#
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# There is no included "static library" of the Pico SDK because all of the Pico SDK Libraries are configurable
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# on a per binary basis, and are always compiled from scratch per binary within the normal Pico SDK CMake build
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#
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# Note you would want to customize this to add or remove the dependencies you want (e.g. you mau not want
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# to depend on pico_stdlib, but rather pick and mix some of its constituents to give you a finer grain of control
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#
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# Note that this example produces a build_info.txt in the output with some approximate (we're not trying to
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# rewrite CMake here!) compile and link flags based on the setup of your static_sdk library
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#
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# Finally note that even copying the build and link flags from build_info.txt and linking against the generated
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# library does not get you all the way, as you still need a second stage boot at the start of the binary (0x000-0x100)
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cmake_minimum_required(VERSION 3.12)
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# Pull in PICO SDK (must be before project)
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include(pico_sdk_import.cmake)
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project(static_sdk C CXX)
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set(CMAKE_C_STANDARD 11)
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set(CMAKE_CXX_STANDARD 17)
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pico_sdk_init()
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if (PICO_ON_DEVICE)
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include(hacky_cmake_helper.cmake)
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add_library(static_sdk
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dummy.c)
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target_compile_definitions(static_sdk PUBLIC
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PICO_NO_BUILD_TYPE_FEATURE=1)
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target_link_libraries(static_sdk PUBLIC pico_stdlib)
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# our hacky_cmake_helper does not deal with generator expressions for libraries, so pick some (assuming we want the pico versions)
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# you might choose not to have these libraries (which are mostly redirecting AEABI functions to our faster (possible ROM) equivalents
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# especially if you are skipping SDK initialization (which is required for some of them)
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target_link_libraries(static_sdk PUBLIC
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pico_printf_pico
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pico_bit_ops_pico
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pico_divider_hardware
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pico_float_pico
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pico_double_pico
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pico_mem_ops_pico
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pico_int64_ops_pico
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pico_stdio_uart
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#pico_stdio_usb
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)
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# Compile definitions
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gather_vars(COMPILE_DEFINITIONS INTERFACE_COMPILE_DEFINITIONS _touched_cd static_sdk)
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list(REMOVE_DUPLICATES COMPILE_DEFINITIONS)
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List(PREPEND COMPILE_DEFINITIONS "") # need a -D at the beginning
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string(REPLACE ";" " -D" COMPILE_DEFINITIONS "${COMPILE_DEFINITIONS}")
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# Compile options
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gather_vars(COMPILE_OPTIONS INTERFACE_COMPILE_OPTIONS _touched_cf static_sdk)
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list(REMOVE_DUPLICATES COMPILE_OPTIONS)
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string(REPLACE ";" " " COMPILE_OPTIONS "${COMPILE_OPTIONS}")
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# Note that the Pico SDK has some options specific to the language being compiled. All
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# SDK has already been compiled, so we'll just strip these and you'll have to deal with these yourselves
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string(REGEX REPLACE "\\$<\\$<COMPILE_LANGUAGE:CXX>:.*>" "" COMPILE_OPTIONS ${COMPILE_OPTIONS})
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# Include dirs
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gather_vars(INCLUDE_DIRECTORIES INTERFACE_INCLUDE_DIRECTORIES _touched_id static_sdk)
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list(REMOVE_DUPLICATES INCLUDE_DIRECTORIES)
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string(REPLACE ";" " " INCLUDE_DIRECTORIES "${INCLUDE_DIRECTORIES}")
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# Link options
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gather_vars(LINK_FLAGS INTERFACE_LINK_OPTIONS _touched_l static_sdk)
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string(REPLACE ";" " " LINK_FLAGS "${LINK_FLAGS}")
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string(REPLACE "LINKER:" "-Wl," LINK_FLAGS "${LINK_FLAGS}")
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# Target properties were scoped to the target being built, lets scope them to static_sdk
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string(REPLACE "$<TARGET_PROPERTY:" "$<TARGET_PROPERTY:static_sdk," COMPILE_DEFINITIONS "${COMPILE_DEFINITIONS}")
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string(REPLACE "$<TARGET_PROPERTY:" "$<TARGET_PROPERTY:static_sdk," COMPILE_OPTIONS "${COMPILE_OPTIONS}")
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string(REPLACE "$<TARGET_PROPERTY:" "$<TARGET_PROPERTY:static_sdk," INCLUDE_DIRECTORIES "${INCLUDE_DIRECTORIES}")
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string(REPLACE "$<TARGET_PROPERTY:" "$<TARGET_PROPERTY:static_sdk," LINK_FLAGS "${LINK_FLAGS}")
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# The only way to get CMake to do some generator expression evaluation is to generate a file
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file(GENERATE OUTPUT build_info.txt CONTENT
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"Compile definitions: ${COMPILE_DEFINITIONS}
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Compile options : ${COMPILE_OPTIONS}
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Include dirs : ${INCLUDE_DIRECTORIES}
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Link flags : ${LINK_FLAGS}")
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endif()
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function(gather_vars VAR_NAME PROPERTY_NAME INCLUDED_VAR_NAME LIB)
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#message("${VAR_NAME}:${PROPERTY_NAME}:${INCLUDED_VAR_NAME}:${LIB}")
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if (NOT ${LIB} IN_LIST ${INCLUDED_VAR_NAME})
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string(FIND "${LIB}" "$<" HAS_GENERATOR_EXPRESSIONS)
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string(FIND "${LIB}" "$<" HAS_GENERATOR_EXPRESSIONS)
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if (LIB MATCHES "\\$<")
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message("Skipping generator expression in ${VAR_NAME}: ${LIB}")
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elseif (LIB MATCHES "::@")
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# todo what are these?
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else()
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list(APPEND ${INCLUDED_VAR_NAME} ${LIB})
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set(${INCLUDED_VAR_NAME} ${${INCLUDED_VAR_NAME}} PARENT_SCOPE)
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get_target_property(new_items ${LIB} ${PROPERTY_NAME})
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if (new_items)
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list(APPEND ${VAR_NAME} ${new_items})
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endif()
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get_target_property(trans_depend ${LIB} INTERFACE_LINK_LIBRARIES)
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# message("Tdep ${trans_depend}")
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if (trans_depend)
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foreach(SUB_LIB ${trans_depend})
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gather_vars(${VAR_NAME} ${PROPERTY_NAME} ${INCLUDED_VAR_NAME} ${SUB_LIB})
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endforeach()
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endif()
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set(${VAR_NAME} ${${VAR_NAME}} PARENT_SCOPE)
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endif()
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endif()
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endfunction()
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# This is a copy of <PICO_SDK_PATH>/external/pico_sdk_import.cmake
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# This can be dropped into an external project to help locate this SDK
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# It should be include()ed prior to project()
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if (DEFINED ENV{PICO_SDK_PATH} AND (NOT PICO_SDK_PATH))
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set(PICO_SDK_PATH $ENV{PICO_SDK_PATH})
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message("Using PICO_SDK_PATH from environment ('${PICO_SDK_PATH}')")
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endif ()
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if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT} AND (NOT PICO_SDK_FETCH_FROM_GIT))
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set(PICO_SDK_FETCH_FROM_GIT $ENV{PICO_SDK_FETCH_FROM_GIT})
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message("Using PICO_SDK_FETCH_FROM_GIT from environment ('${PICO_SDK_FETCH_FROM_GIT}')")
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endif ()
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if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT_PATH} AND (NOT PICO_SDK_FETCH_FROM_GIT_PATH))
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set(PICO_SDK_FETCH_FROM_GIT_PATH $ENV{PICO_SDK_FETCH_FROM_GIT_PATH})
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message("Using PICO_SDK_FETCH_FROM_GIT_PATH from environment ('${PICO_SDK_FETCH_FROM_GIT_PATH}')")
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endif ()
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set(PICO_SDK_PATH "${PICO_SDK_PATH}" CACHE PATH "Path to the PICO SDK")
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set(PICO_SDK_FETCH_FROM_GIT "${PICO_SDK_FETCH_FROM_GIT}" CACHE BOOL "Set to ON to fetch copy of PICO SDK from git if not otherwise locatable")
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set(PICO_SDK_FETCH_FROM_GIT_PATH "${PICO_SDK_FETCH_FROM_GIT_PATH}" CACHE FILEPATH "location to download SDK")
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if (NOT PICO_SDK_PATH)
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if (PICO_SDK_FETCH_FROM_GIT)
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include(FetchContent)
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set(FETCHCONTENT_BASE_DIR_SAVE ${FETCHCONTENT_BASE_DIR})
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if (PICO_SDK_FETCH_FROM_GIT_PATH)
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get_filename_component(FETCHCONTENT_BASE_DIR "${PICO_SDK_FETCH_FROM_GIT_PATH}" REALPATH BASE_DIR "${CMAKE_SOURCE_DIR}")
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endif ()
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FetchContent_Declare(
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pico_sdk
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GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
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GIT_TAG master
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)
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if (NOT pico_sdk)
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message("Downloading PICO SDK")
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FetchContent_Populate(pico_sdk)
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set(PICO_SDK_PATH ${pico_sdk_SOURCE_DIR})
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endif ()
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set(FETCHCONTENT_BASE_DIR ${FETCHCONTENT_BASE_DIR_SAVE})
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else ()
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message(FATAL_ERROR
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"PICO SDK location was not specified. Please set PICO_SDK_PATH or set PICO_SDK_FETCH_FROM_GIT to on to fetch from git."
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)
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endif ()
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endif ()
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get_filename_component(PICO_SDK_PATH "${PICO_SDK_PATH}" REALPATH BASE_DIR "${CMAKE_BINARY_DIR}")
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if (NOT EXISTS ${PICO_SDK_PATH})
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message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' not found")
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endif ()
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set(PICO_SDK_INIT_CMAKE_FILE ${PICO_SDK_PATH}/pico_sdk_init.cmake)
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if (NOT EXISTS ${PICO_SDK_INIT_CMAKE_FILE})
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message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' does not appear to contain the PICO SDK")
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endif ()
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set(PICO_SDK_PATH ${PICO_SDK_PATH} CACHE PATH "Path to the PICO SDK" FORCE)
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include(${PICO_SDK_INIT_CMAKE_FILE})
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