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# SPDX-License-Identifier: Apache-2.0
########################################################
# Table of contents
########################################################
# 1. Zephyr-aware extensions
# 1.1. zephyr_*
# 1.2. zephyr_library_*
# 1.2.1 zephyr_interface_library_*
# 1.3. generate_inc_*
# 1.4. board_*
# 1.5. Misc.
# 2. Kconfig-aware extensions
# 2.1 Misc
# 3. CMake-generic extensions
# 3.1. *_ifdef
# 3.2. *_ifndef
# 3.3. *_option compiler compatibility checks
# 3.3.1 Toolchain integration
# 3.4. Debugging CMake
# 3.5. File system management
# 4. Devicetree extensions
# 4.1 dt_*
# 5. Zephyr linker functions
# 5.1. zephyr_linker*
########################################################
# 1. Zephyr-aware extensions
########################################################
# 1.1. zephyr_*
#
# The following methods are for modifying the CMake library[0] called
# "zephyr". zephyr is a catch-all CMake library for source files that
# can be built purely with the include paths, defines, and other
# compiler flags that all zephyr source files use.
# [0] https://cmake.org/cmake/help/latest/manual/cmake-buildsystem.7.html
#
# Example usage:
# zephyr_sources(
# random_esp32.c
# utils.c
# )
#
# Is short for:
# target_sources(zephyr PRIVATE
# ${CMAKE_CURRENT_SOURCE_DIR}/random_esp32.c
# ${CMAKE_CURRENT_SOURCE_DIR}/utils.c
# )
#
# As a very high-level introduction here are two call graphs that are
# purposely minimalistic and incomplete.
#
# zephyr_library_cc_option()
# |
# v
# zephyr_library_compile_options() --> target_compile_options()
#
#
# zephyr_cc_option() ---> target_cc_option()
# |
# v
# zephyr_cc_option_fallback() ---> target_cc_option_fallback()
# |
# v
# zephyr_compile_options() ---> target_compile_options()
#
# https://cmake.org/cmake/help/latest/command/target_sources.html
function(zephyr_sources)
foreach(arg ${ARGV})
if(IS_DIRECTORY ${arg})
message(FATAL_ERROR "zephyr_sources() was called on a directory")
endif()
target_sources(zephyr PRIVATE ${arg})
endforeach()
endfunction()
# https://cmake.org/cmake/help/latest/command/target_include_directories.html
function(zephyr_include_directories)
foreach(arg ${ARGV})
if(IS_ABSOLUTE ${arg})
set(path ${arg})
else()
set(path ${CMAKE_CURRENT_SOURCE_DIR}/${arg})
endif()
target_include_directories(zephyr_interface INTERFACE ${path})
endforeach()
endfunction()
# https://cmake.org/cmake/help/latest/command/target_include_directories.html
function(zephyr_system_include_directories)
foreach(arg ${ARGV})
if(IS_ABSOLUTE ${arg})
set(path ${arg})
else()
set(path ${CMAKE_CURRENT_SOURCE_DIR}/${arg})
endif()
target_include_directories(zephyr_interface SYSTEM INTERFACE ${path})
endforeach()
endfunction()
# https://cmake.org/cmake/help/latest/command/target_compile_definitions.html
function(zephyr_compile_definitions)
target_compile_definitions(zephyr_interface INTERFACE ${ARGV})
endfunction()
# https://cmake.org/cmake/help/latest/command/target_compile_options.html
function(zephyr_compile_options)
target_compile_options(zephyr_interface INTERFACE ${ARGV})
endfunction()
# https://cmake.org/cmake/help/latest/command/target_link_libraries.html
function(zephyr_link_libraries)
target_link_libraries(zephyr_interface INTERFACE ${ARGV})
endfunction()
# See this file section 3.1. target_cc_option
function(zephyr_cc_option)
foreach(arg ${ARGV})
target_cc_option(zephyr_interface INTERFACE ${arg})
endforeach()
endfunction()
function(zephyr_cc_option_fallback option1 option2)
target_cc_option_fallback(zephyr_interface INTERFACE ${option1} ${option2})
endfunction()
function(zephyr_ld_options)
target_ld_options(zephyr_interface INTERFACE ${ARGV})
endfunction()
# Getter functions for extracting build information from
# zephyr_interface. Returning lists, and strings is supported, as is
# requesting specific categories of build information (defines,
# includes, options).
#
# The naming convention follows:
# zephyr_get_${build_information}_for_lang${format}(lang x [STRIP_PREFIX])
# Where
# the argument 'x' is written with the result
# and
# ${build_information} can be one of
# - include_directories # -I directories
# - system_include_directories # -isystem directories
# - compile_definitions # -D'efines
# - compile_options # misc. compiler flags
# and
# ${format} can be
# - the empty string '', signifying that it should be returned as a list
# - _as_string signifying that it should be returned as a string
# and
# ${lang} can be one of
# - C
# - CXX
# - ASM
#
# STRIP_PREFIX
#
# By default the result will be returned ready to be passed directly
# to a compiler, e.g. prefixed with -D, or -I, but it is possible to
# omit this prefix by specifying 'STRIP_PREFIX' . This option has no
# effect for 'compile_options'.
#
# e.g.
# zephyr_get_include_directories_for_lang(ASM x)
# writes "-Isome_dir;-Isome/other/dir" to x
function(zephyr_get_include_directories_for_lang_as_string lang i)
zephyr_get_include_directories_for_lang(${lang} list_of_flags DELIMITER " " ${ARGN})
convert_list_of_flags_to_string_of_flags(list_of_flags str_of_flags)
set(${i} ${str_of_flags} PARENT_SCOPE)
endfunction()
function(zephyr_get_system_include_directories_for_lang_as_string lang i)
zephyr_get_system_include_directories_for_lang(${lang} list_of_flags DELIMITER " " ${ARGN})
convert_list_of_flags_to_string_of_flags(list_of_flags str_of_flags)
set(${i} ${str_of_flags} PARENT_SCOPE)
endfunction()
function(zephyr_get_compile_definitions_for_lang_as_string lang i)
zephyr_get_compile_definitions_for_lang(${lang} list_of_flags DELIMITER " " ${ARGN})
convert_list_of_flags_to_string_of_flags(list_of_flags str_of_flags)
set(${i} ${str_of_flags} PARENT_SCOPE)
endfunction()
function(zephyr_get_compile_options_for_lang_as_string lang i)
zephyr_get_compile_options_for_lang(${lang} list_of_flags DELIMITER " ")
convert_list_of_flags_to_string_of_flags(list_of_flags str_of_flags)
set(${i} ${str_of_flags} PARENT_SCOPE)
endfunction()
function(zephyr_get_include_directories_for_lang lang i)
zephyr_get_parse_args(args ${ARGN})
get_property(flags TARGET zephyr_interface PROPERTY INTERFACE_INCLUDE_DIRECTORIES)
process_flags(${lang} flags output_list)
string(REPLACE ";" "$<SEMICOLON>" genexp_output_list "${output_list}")
if(NOT ARGN)
set(result_output_list "-I$<JOIN:${genexp_output_list},$<SEMICOLON>-I>")
elseif(args_STRIP_PREFIX)
# The list has no prefix, so don't add it.
set(result_output_list ${output_list})
elseif(args_DELIMITER)
set(result_output_list "-I$<JOIN:${genexp_output_list},${args_DELIMITER}-I>")
endif()
set(${i} ${result_output_list} PARENT_SCOPE)
endfunction()
function(zephyr_get_system_include_directories_for_lang lang i)
zephyr_get_parse_args(args ${ARGN})
get_property(flags TARGET zephyr_interface PROPERTY INTERFACE_SYSTEM_INCLUDE_DIRECTORIES)
process_flags(${lang} flags output_list)
string(REPLACE ";" "$<SEMICOLON>" genexp_output_list "${output_list}")
set_ifndef(args_DELIMITER "$<SEMICOLON>")
set(result_output_list "$<$<BOOL:${genexp_output_list}>:-isystem$<JOIN:${genexp_output_list},${args_DELIMITER}-isystem>>")
set(${i} ${result_output_list} PARENT_SCOPE)
endfunction()
function(zephyr_get_compile_definitions_for_lang lang i)
zephyr_get_parse_args(args ${ARGN})
get_property(flags TARGET zephyr_interface PROPERTY INTERFACE_COMPILE_DEFINITIONS)
process_flags(${lang} flags output_list)
string(REPLACE ";" "$<SEMICOLON>" genexp_output_list "${output_list}")
set_ifndef(args_DELIMITER "$<SEMICOLON>")
set(result_output_list "-D$<JOIN:${genexp_output_list},${args_DELIMITER}-D>")
set(${i} ${result_output_list} PARENT_SCOPE)
endfunction()
function(zephyr_get_compile_options_for_lang lang i)
zephyr_get_parse_args(args ${ARGN})
get_property(flags TARGET zephyr_interface PROPERTY INTERFACE_COMPILE_OPTIONS)
process_flags(${lang} flags output_list)
string(REPLACE ";" "$<SEMICOLON>" genexp_output_list "${output_list}")
set_ifndef(args_DELIMITER "$<SEMICOLON>")
set(result_output_list "$<JOIN:${genexp_output_list},${args_DELIMITER}>")
set(${i} ${result_output_list} PARENT_SCOPE)
endfunction()
# This function writes a dict to it's output parameter
# 'return_dict'. The dict has information about the parsed arguments,
#
# Usage:
# zephyr_get_parse_args(foo ${ARGN})
# print(foo_STRIP_PREFIX) # foo_STRIP_PREFIX might be set to 1
function(zephyr_get_parse_args return_dict)
foreach(x ${ARGN})
if(DEFINED single_argument)
set(${single_argument} ${x} PARENT_SCOPE)
unset(single_argument)
else()
if(x STREQUAL STRIP_PREFIX)
set(${return_dict}_STRIP_PREFIX 1 PARENT_SCOPE)
elseif(x STREQUAL NO_SPLIT)
set(${return_dict}_NO_SPLIT 1 PARENT_SCOPE)
elseif(x STREQUAL DELIMITER)
set(single_argument ${return_dict}_DELIMITER)
endif()
endif()
endforeach()
endfunction()
function(process_flags lang input output)
# The flags might contains compile language generator expressions that
# look like this:
# $<$<COMPILE_LANGUAGE:CXX>:-fno-exceptions>
# $<$<COMPILE_LANGUAGE:CXX>:$<OTHER_EXPRESSION>>
#
# Flags that don't specify a language like this apply to all
# languages.
#
# See COMPILE_LANGUAGE in
# https://cmake.org/cmake/help/v3.3/manual/cmake-generator-expressions.7.html
#
# To deal with this, we apply a regex to extract the flag and also
# to find out if the language matches.
#
# If this doesn't work out we might need to ban the use of
# COMPILE_LANGUAGE and instead partition C, CXX, and ASM into
# different libraries
set(languages C CXX ASM)
set(tmp_list "")
foreach(flag ${${input}})
set(is_compile_lang_generator_expression 0)
foreach(l ${languages})
if(flag MATCHES "<COMPILE_LANGUAGE:${l}>:([^>]+)>")
set(updated_flag ${CMAKE_MATCH_1})
set(is_compile_lang_generator_expression 1)
if(${l} STREQUAL ${lang})
# This test will match in case there are more generator expressions in the flag.
# As example: $<$<COMPILE_LANGUAGE:C>:$<OTHER_EXPRESSION>>
# $<$<OTHER_EXPRESSION:$<COMPILE_LANGUAGE:C>:something>>
string(REGEX MATCH "(\\\$<)[^\\\$]*(\\\$<)[^\\\$]*(\\\$<)" IGNORE_RESULT ${flag})
if(CMAKE_MATCH_2)
# Nested generator expressions are used, just substitue `$<COMPILE_LANGUAGE:${l}>` to `1`
string(REGEX REPLACE "\\\$<COMPILE_LANGUAGE:${l}>" "1" updated_flag ${flag})
endif()
list(APPEND tmp_list ${updated_flag})
break()
endif()
endif()
endforeach()
if(NOT is_compile_lang_generator_expression)
# SHELL is used to avoid de-deplucation, but when process flags
# then this tag must be removed to return real compile/linker flags.
if(flag MATCHES "SHELL:[ ]*(.*)")
separate_arguments(flag UNIX_COMMAND ${CMAKE_MATCH_1})
endif()
# Flags may be placed inside generator expression, therefore any flag
# which is not already a generator expression must have commas converted.
if(NOT flag MATCHES "\\\$<.*>")
string(REPLACE "," "$<COMMA>" flag "${flag}")
endif()
list(APPEND tmp_list ${flag})
endif()
endforeach()
set(${output} ${tmp_list} PARENT_SCOPE)
endfunction()
function(convert_list_of_flags_to_string_of_flags ptr_list_of_flags string_of_flags)
# Convert the list to a string so we can do string replace
# operations on it and replace the ";" list separators with a
# whitespace so the flags are spaced out
string(REPLACE ";" " " locally_scoped_string_of_flags "${${ptr_list_of_flags}}")
# Set the output variable in the parent scope
set(${string_of_flags} ${locally_scoped_string_of_flags} PARENT_SCOPE)
endfunction()
macro(get_property_and_add_prefix result target property prefix)
zephyr_get_parse_args(args ${ARGN})
if(args_STRIP_PREFIX)
set(maybe_prefix "")
else()
set(maybe_prefix ${prefix})
endif()
get_property(target_property TARGET ${target} PROPERTY ${property})
foreach(x ${target_property})
list(APPEND ${result} ${maybe_prefix}${x})
endforeach()
endmacro()
# 1.2 zephyr_library_*
#
# Zephyr libraries use CMake's library concept and a set of
# assumptions about how zephyr code is organized to cut down on
# boilerplate code.
#
# A Zephyr library can be constructed by the function zephyr_library
# or zephyr_library_named. The constructors create a CMake library
# with a name accessible through the variable ZEPHYR_CURRENT_LIBRARY.
#
# The variable ZEPHYR_CURRENT_LIBRARY should seldom be needed since
# the zephyr libraries have methods that modify the libraries. These
# methods have the signature: zephyr_library_<target-function>
#
# The methods are wrappers around the CMake target_* functions. See
# https://cmake.org/cmake/help/latest/manual/cmake-commands.7.html for
# documentation on the underlying target_* functions.
#
# The methods modify the CMake target_* API to reduce boilerplate;
# PRIVATE is assumed
# The target is assumed to be ZEPHYR_CURRENT_LIBRARY
#
# When a flag that is given through the zephyr_* API conflicts with
# the zephyr_library_* API then precedence will be given to the
# zephyr_library_* API. In other words, local configuration overrides
# global configuration.
# Constructor with a directory-inferred name
macro(zephyr_library)
zephyr_library_get_current_dir_lib_name(${ZEPHYR_BASE} lib_name)
zephyr_library_named(${lib_name})
endmacro()
# Determines what the current directory's lib name would be according to the
# provided base and writes it to the argument "lib_name"
macro(zephyr_library_get_current_dir_lib_name base lib_name)
# Remove the prefix (/home/sebo/zephyr/driver/serial/CMakeLists.txt => driver/serial/CMakeLists.txt)
file(RELATIVE_PATH name ${base} ${CMAKE_CURRENT_LIST_FILE})
# Remove the filename (driver/serial/CMakeLists.txt => driver/serial)
get_filename_component(name ${name} DIRECTORY)
# Replace / with __ (driver/serial => driver__serial)
string(REGEX REPLACE "/" "__" name ${name})
set(${lib_name} ${name})
endmacro()
# Constructor with an explicitly given name.
macro(zephyr_library_named name)
# This is a macro because we need add_library() to be executed
# within the scope of the caller.
set(ZEPHYR_CURRENT_LIBRARY ${name})
add_library(${name} STATIC "")
zephyr_append_cmake_library(${name})
target_link_libraries(${name} PUBLIC zephyr_interface)
endmacro()
# Provides amend functionality to a Zephyr library for out-of-tree usage.
#
# When called from a Zephyr module, the corresponding zephyr library defined
# within Zephyr will be looked up.
#
# Note, in order to ensure correct library when amending, the folder structure in the
# Zephyr module must resemble the structure used in Zephyr, as example:
#
# Example: to amend the zephyr library created in
# ZEPHYR_BASE/drivers/entropy/CMakeLists.txt
# add the following file:
# ZEPHYR_MODULE/drivers/entropy/CMakeLists.txt
# with content:
# zephyr_library_amend()
# zephyr_libray_add_sources(...)
#
# It is also possible to use generator expression when amending to Zephyr
# libraries.
#
# For example, in case it is required to expose the Zephyr library's folder as
# include path then the following is possible:
# zephyr_library_amend()
# zephyr_library_include_directories($<TARGET_PROPERTY:SOURCE_DIR>)
#
# See the CMake documentation for more target properties or generator
# expressions.
#
macro(zephyr_library_amend)
# This is a macro because we need to ensure the ZEPHYR_CURRENT_LIBRARY and
# following zephyr_library_* calls are executed within the scope of the
# caller.
if(NOT ZEPHYR_CURRENT_MODULE_DIR)
message(FATAL_ERROR "Function only available for Zephyr modules.")
endif()
zephyr_library_get_current_dir_lib_name(${ZEPHYR_CURRENT_MODULE_DIR} lib_name)
set(ZEPHYR_CURRENT_LIBRARY ${lib_name})
endmacro()
function(zephyr_link_interface interface)
target_link_libraries(${interface} INTERFACE zephyr_interface)
endfunction()
#
# zephyr_library versions of normal CMake target_<func> functions
#
function(zephyr_library_sources source)
target_sources(${ZEPHYR_CURRENT_LIBRARY} PRIVATE ${source} ${ARGN})
endfunction()
function(zephyr_library_include_directories)
target_include_directories(${ZEPHYR_CURRENT_LIBRARY} PRIVATE ${ARGN})
endfunction()
function(zephyr_library_link_libraries item)
target_link_libraries(${ZEPHYR_CURRENT_LIBRARY} PUBLIC ${item} ${ARGN})
endfunction()
function(zephyr_library_compile_definitions item)
target_compile_definitions(${ZEPHYR_CURRENT_LIBRARY} PRIVATE ${item} ${ARGN})
endfunction()
function(zephyr_library_compile_options item)
# The compiler is relied upon for sane behaviour when flags are in
# conflict. Compilers generally give precedence to flags given late
# on the command line. So to ensure that zephyr_library_* flags are
# placed late on the command line we create a dummy interface
# library and link with it to obtain the flags.
#
# Linking with a dummy interface library will place flags later on
# the command line than the the flags from zephyr_interface because
# zephyr_interface will be the first interface library that flags
# are taken from.
string(MD5 uniqueness ${item})
set(lib_name options_interface_lib_${uniqueness})
if (TARGET ${lib_name})
# ${item} already added, ignoring duplicate just like CMake does
return()
endif()
add_library( ${lib_name} INTERFACE)
target_compile_options(${lib_name} INTERFACE ${item} ${ARGN})
target_link_libraries(${ZEPHYR_CURRENT_LIBRARY} PRIVATE ${lib_name})
endfunction()
function(zephyr_library_cc_option)
foreach(option ${ARGV})
string(MAKE_C_IDENTIFIER check${option} check)
zephyr_check_compiler_flag(C ${option} ${check})
if(${check})
zephyr_library_compile_options(${option})
endif()
endforeach()
endfunction()
# Add the existing CMake library 'library' to the global list of
# Zephyr CMake libraries. This is done automatically by the
# constructor but must called explicitly on CMake libraries that do
# not use a zephyr library constructor.
function(zephyr_append_cmake_library library)
if(TARGET zephyr_prebuilt)
message(WARNING
"zephyr_library() or zephyr_library_named() called in Zephyr CMake "
"application mode. `${library}` will not be treated as a Zephyr library."
"To create a Zephyr library in Zephyr CMake kernel mode consider "
"creating a Zephyr module. See more here: "
"https://docs.zephyrproject.org/latest/guides/modules.html"
)
endif()
set_property(GLOBAL APPEND PROPERTY ZEPHYR_LIBS ${library})
endfunction()
# Add the imported library 'library_name', located at 'library_path' to the
# global list of Zephyr CMake libraries.
function(zephyr_library_import library_name library_path)
add_library(${library_name} STATIC IMPORTED GLOBAL)
set_target_properties(${library_name}
PROPERTIES IMPORTED_LOCATION
${library_path}
)
zephyr_append_cmake_library(${library_name})
endfunction()
# Place the current zephyr library in the application memory partition.
#
# The partition argument is the name of the partition where the library shall
# be placed.
#
# Note: Ensure the given partition has been define using
# K_APPMEM_PARTITION_DEFINE in source code.
function(zephyr_library_app_memory partition)
set_property(TARGET zephyr_property_target
APPEND PROPERTY COMPILE_OPTIONS
"-l" $<TARGET_FILE_NAME:${ZEPHYR_CURRENT_LIBRARY}> "${partition}")
endfunction()
# 1.2.1 zephyr_interface_library_*
#
# A Zephyr interface library is a thin wrapper over a CMake INTERFACE
# library. The most important responsibility of this abstraction is to
# ensure that when a user KConfig-enables a library then the header
# files of this library will be accessible to the 'app' library.
#
# This is done because when a user uses Kconfig to enable a library he
# expects to be able to include it's header files and call it's
# functions out-of-the box.
#
# A Zephyr interface library should be used when there exists some
# build information (include directories, defines, compiler flags,
# etc.) that should be applied to a set of Zephyr libraries and 'app'
# might be one of these libraries.
#
# Zephyr libraries must explicitly call
# zephyr_library_link_libraries(<interface_library>) to use this build
# information. 'app' is treated as a special case for usability
# reasons; a Kconfig option (CONFIG_APP_LINK_WITH_<interface_library>)
# should exist for each interface_library and will determine if 'app'
# links with the interface_library.
#
# This API has a constructor like the zephyr_library API has, but it
# does not have wrappers over the other cmake target functions.
macro(zephyr_interface_library_named name)
add_library(${name} INTERFACE)
set_property(GLOBAL APPEND PROPERTY ZEPHYR_INTERFACE_LIBS ${name})
endmacro()
# 1.3 generate_inc_*
# These functions are useful if there is a need to generate a file
# that can be included into the application at build time. The file
# can also be compressed automatically when embedding it.
#
# See tests/application_development/gen_inc_file for an example of
# usage.
function(generate_inc_file
source_file # The source file to be converted to hex
generated_file # The generated file
)
add_custom_command(
OUTPUT ${generated_file}
COMMAND
${PYTHON_EXECUTABLE}
${ZEPHYR_BASE}/scripts/file2hex.py
${ARGN} # Extra arguments are passed to file2hex.py
--file ${source_file}
> ${generated_file} # Does pipe redirection work on Windows?
DEPENDS ${source_file}
WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
)
endfunction()
function(generate_inc_file_for_gen_target
target # The cmake target that depends on the generated file
source_file # The source file to be converted to hex
generated_file # The generated file
gen_target # The generated file target we depend on
# Any additional arguments are passed on to file2hex.py
)
generate_inc_file(${source_file} ${generated_file} ${ARGN})
# Ensure 'generated_file' is generated before 'target' by creating a
# dependency between the two targets
add_dependencies(${target} ${gen_target})
endfunction()
function(generate_inc_file_for_target
target # The cmake target that depends on the generated file
source_file # The source file to be converted to hex
generated_file # The generated file
# Any additional arguments are passed on to file2hex.py
)
# Ensure 'generated_file' is generated before 'target' by creating a
# 'custom_target' for it and setting up a dependency between the two
# targets
# But first create a unique name for the custom target
generate_unique_target_name_from_filename(${generated_file} generated_target_name)
add_custom_target(${generated_target_name} DEPENDS ${generated_file})
generate_inc_file_for_gen_target(${target} ${source_file} ${generated_file} ${generated_target_name} ${ARGN})
endfunction()
# 1.4. board_*
#
# This section is for extensions related to Zephyr board handling.
#
# Zephyr board extensions current contains:
# - Board runners
# - Board revision
# Zephyr board runners:
# Zephyr board runner extension functions control Zephyr's board runners
# from the build system. The Zephyr build system has targets for
# flashing and debugging supported boards. These are wrappers around a
# "runner" Python subpackage that is part of Zephyr's "west" tool.
#
# This section provides glue between CMake and the Python code that
# manages the runners.
function(_board_check_runner_type type) # private helper
if (NOT (("${type}" STREQUAL "FLASH") OR ("${type}" STREQUAL "DEBUG")))
message(FATAL_ERROR "invalid type ${type}; should be FLASH or DEBUG")
endif()
endfunction()
# This function sets the runner for the board unconditionally. It's
# meant to be used from application CMakeLists.txt files.
#
# NOTE: Usually board_set_xxx_ifnset() is best in board.cmake files.
# This lets the user set the runner at cmake time, or in their
# own application's CMakeLists.txt.
#
# Usage:
# board_set_runner(FLASH pyocd)
#
# This would set the board's flash runner to "pyocd".
#
# In general, "type" is FLASH or DEBUG, and "runner" is the name of a
# runner.
function(board_set_runner type runner)
_board_check_runner_type(${type})
if (DEFINED BOARD_${type}_RUNNER)
message(STATUS "overriding ${type} runner ${BOARD_${type}_RUNNER}; it's now ${runner}")
endif()
set(BOARD_${type}_RUNNER ${runner} PARENT_SCOPE)
endfunction()
# This macro is like board_set_runner(), but will only make a change
# if that runner is currently not set.
#
# See also board_set_flasher_ifnset() and board_set_debugger_ifnset().
macro(board_set_runner_ifnset type runner)
_board_check_runner_type(${type})
# This is a macro because set_ifndef() works at parent scope.
# If this were a function, that would be this function's scope,
# which wouldn't work.
set_ifndef(BOARD_${type}_RUNNER ${runner})
endmacro()
# A convenience macro for board_set_runner(FLASH ${runner}).
macro(board_set_flasher runner)
board_set_runner(FLASH ${runner})
endmacro()
# A convenience macro for board_set_runner(DEBUG ${runner}).
macro(board_set_debugger runner)
board_set_runner(DEBUG ${runner})
endmacro()
# A convenience macro for board_set_runner_ifnset(FLASH ${runner}).
macro(board_set_flasher_ifnset runner)
board_set_runner_ifnset(FLASH ${runner})
endmacro()
# A convenience macro for board_set_runner_ifnset(DEBUG ${runner}).
macro(board_set_debugger_ifnset runner)
board_set_runner_ifnset(DEBUG ${runner})
endmacro()
# This function is intended for board.cmake files and application
# CMakeLists.txt files.
#
# Usage from board.cmake files:
# board_runner_args(runner "--some-arg=val1" "--another-arg=val2")
#
# The build system will then ensure the command line used to
# create the runner contains:
# --some-arg=val1 --another-arg=val2
#
# Within application CMakeLists.txt files, ensure that all calls to
# board_runner_args() are part of a macro named app_set_runner_args(),
# like this, which is defined before including the boilerplate file:
# macro(app_set_runner_args)
# board_runner_args(runner "--some-app-setting=value")
# endmacro()
#
# The build system tests for the existence of the macro and will
# invoke it at the appropriate time if it is defined.
#
# Any explicitly provided settings given by this function override
# defaults provided by the build system.
function(board_runner_args runner)
string(MAKE_C_IDENTIFIER ${runner} runner_id)
# Note the "_EXPLICIT_" here, and see below.
set_property(GLOBAL APPEND PROPERTY BOARD_RUNNER_ARGS_EXPLICIT_${runner_id} ${ARGN})
endfunction()
# This function is intended for internal use by
# boards/common/runner.board.cmake files.
#
# Basic usage:
# board_finalize_runner_args(runner)
#
# This ensures the build system captures all arguments added in any
# board_runner_args() calls, and otherwise finishes registering a
# runner for use.
#
# Extended usage:
# board_runner_args(runner "--some-arg=default-value")
#
# This provides common or default values for arguments. These are
# placed before board_runner_args() calls, so they generally take
# precedence, except for arguments which can be given multiple times
# (use these with caution).
function(board_finalize_runner_args runner)
# If the application provided a macro to add additional runner
# arguments, handle them.
if(COMMAND app_set_runner_args)
app_set_runner_args()
endif()
# Retrieve the list of explicitly set arguments.
string(MAKE_C_IDENTIFIER ${runner} runner_id)
get_property(explicit GLOBAL PROPERTY "BOARD_RUNNER_ARGS_EXPLICIT_${runner_id}")
# Note no _EXPLICIT_ here. This property contains the final list.
set_property(GLOBAL APPEND PROPERTY BOARD_RUNNER_ARGS_${runner_id}
# Default arguments from the common runner file come first.
${ARGN}
# Arguments explicitly given with board_runner_args() come
# last, so they take precedence.
${explicit}
)
# Add the finalized runner to the global property list.
set_property(GLOBAL APPEND PROPERTY ZEPHYR_RUNNERS ${runner})
endfunction()
# Zephyr board revision:
#
# This section provides a function for revision checking.
# Usage:
# board_check_revision(FORMAT <LETTER | MAJOR.MINOR.PATCH>
# [EXACT]
# [DEFAULT_REVISION <revision>]
# [HIGHEST_REVISION <revision>]
# )
#
# Zephyr board extension function.
#
# This function can be used in `boards/<board>/revision.cmake` to check a user
# requested revision against available board revisions.
#
# The function will check the revision from `-DBOARD=<board>@<revision>` that
# is provided by the user according to the arguments.
# When `EXACT` is not specified, this function will set the Zephyr build system
# variable `ACTIVE_BOARD_REVISION` with the selected revision.
#
# FORMAT <LETTER | MAJOR.MINOR.PATCH>: Specify the revision format.
# LETTER: Revision format is a single letter from A - Z.
# MAJOR.MINOR.PATCH: Revision format is three numbers, separated by `.`,
# `x.y.z`. Trailing zeroes may be omitted on the
# command line, which means:
# 1.0.0 == 1.0 == 1
#
# EXACT: Revision is required to be an exact match. As example, available revisions are:
# 0.1.0 and 0.3.0, and user provides 0.2.0, then an error is reported
# when `EXACT` is given.
# If `EXACT` is not provided, then closest lower revision will be selected
# as the active revision, which in the example will be `0.1.0`.
#
# DEFAULT_REVISION: Provides a default revision to use when user has not selected
# a revision number. If no default revision is provided then
# user will be printed with an error if no revision is given
# on the command line.
#
# HIGHEST_REVISION: Allows to specify highest valid revision for a board.
# This can be used to ensure that a newer board cannot be used
# with an older Zephyr. As example, if current board supports
# revisions 0.x.0-0.99.99 and 1.0.0-1.99.99, and it is expected
# that current board implementation will not work with board
# revision 2.0.0, then HIGHEST_REVISION can be set to 1.99.99,
# and user will be printed with an error if using
# `<board>@2.0.0` or higher.
# This field is not needed when `EXACT` is used.
#
# VALID_REVISIONS: A list of valid revisions for this board.
# If this argument is not provided, then each Kconfig fragment
# of the form ``<board>_<revision>.conf`` in the board folder
# will be used as a valid revision for the board.
#
function(board_check_revision)
set(options EXACT)
set(single_args FORMAT DEFAULT_REVISION HIGHEST_REVISION)
set(multi_args VALID_REVISIONS)
cmake_parse_arguments(BOARD_REV "${options}" "${single_args}" "${multi_args}" ${ARGN})
string(TOUPPER ${BOARD_REV_FORMAT} BOARD_REV_FORMAT)
if(NOT DEFINED BOARD_REVISION)
if(DEFINED BOARD_REV_DEFAULT_REVISION)
set(BOARD_REVISION ${BOARD_REV_DEFAULT_REVISION})
set(BOARD_REVISION ${BOARD_REVISION} PARENT_SCOPE)
else()
message(FATAL_ERROR "No board revision specified, Board: `${BOARD}` \
requires a revision. Please use: `-DBOARD=${BOARD}@<revision>`")
endif()
endif()
if(DEFINED BOARD_REV_HIGHEST_REVISION)
if(((BOARD_REV_FORMAT STREQUAL LETTER) AND
(BOARD_REVISION STRGREATER BOARD_REV_HIGHEST_REVISION)) OR
((BOARD_REV_FORMAT MATCHES "^MAJOR\.MINOR\.PATCH$") AND
(BOARD_REVISION VERSION_GREATER BOARD_REV_HIGHEST_REVISION))
)
message(FATAL_ERROR "Board revision `${BOARD_REVISION}` greater than \
highest supported revision `${BOARD_REV_HIGHEST_REVISION}`. \
Please specify a valid board revision.")
endif()
endif()
if(BOARD_REV_FORMAT STREQUAL LETTER)
set(revision_regex "([A-Z])")
elseif(BOARD_REV_FORMAT MATCHES "^MAJOR\.MINOR\.PATCH$")
set(revision_regex "((0|[1-9][0-9]*)(\.[0-9]+)(\.[0-9]+))")
# We allow loose <board>@<revision> typing on command line.
# so append missing zeroes.
if(BOARD_REVISION MATCHES "((0|[1-9][0-9]*)(\.[0-9]+)?(\.[0-9]+)?)")
if(NOT CMAKE_MATCH_3)
set(BOARD_REVISION ${BOARD_REVISION}.0)
set(BOARD_REVISION ${BOARD_REVISION} PARENT_SCOPE)
endif()
if(NOT CMAKE_MATCH_4)
set(BOARD_REVISION ${BOARD_REVISION}.0)
set(BOARD_REVISION ${BOARD_REVISION} PARENT_SCOPE)
endif()
endif()
else()
message(FATAL_ERROR "Invalid format specified for \
`board_check_revision(FORMAT <LETTER | MAJOR.MINOR.PATCH>)`")
endif()
if(NOT (BOARD_REVISION MATCHES "^${revision_regex}$"))
message(FATAL_ERROR "Invalid revision format used for `${BOARD_REVISION}`. \
Board `${BOARD}` uses revision format: ${BOARD_REV_FORMAT}.")
endif()
if(NOT DEFINED BOARD_REV_VALID_REVISIONS)
file(GLOB revision_candidates LIST_DIRECTORIES false RELATIVE ${BOARD_DIR}
${BOARD_DIR}/${BOARD}_*.conf
)
string(REPLACE "." "_" underscore_revision_regex ${revision_regex})
set(file_revision_regex "${BOARD}_${underscore_revision_regex}.conf")
foreach(candidate ${revision_candidates})
if(${candidate} MATCHES "${file_revision_regex}")
string(REPLACE "_" "." FOUND_BOARD_REVISION ${CMAKE_MATCH_1})
list(APPEND BOARD_REV_VALID_REVISIONS ${FOUND_BOARD_REVISION})
endif()
endforeach()
endif()
if(${BOARD_REVISION} IN_LIST BOARD_REV_VALID_REVISIONS)
# Found exact match.
return()
endif()
if(NOT BOARD_REV_EXACT)
foreach(TEST_REVISION ${BOARD_REV_VALID_REVISIONS})
if((BOARD_REV_FORMAT MATCHES "^MAJOR\.MINOR\.PATCH$") AND
(${BOARD_REVISION} VERSION_GREATER_EQUAL ${TEST_REVISION}) AND
(${TEST_REVISION} VERSION_GREATER_EQUAL "${ACTIVE_BOARD_REVISION}")
)
set(ACTIVE_BOARD_REVISION ${TEST_REVISION})
elseif((BOARD_REV_FORMAT STREQUAL LETTER) AND
(${BOARD_REVISION} STRGREATER ${TEST_REVISION}) AND
(${TEST_REVISION} STRGREATER "${ACTIVE_BOARD_REVISION}")
)
set(ACTIVE_BOARD_REVISION ${TEST_REVISION})
endif()
endforeach()
endif()
if(BOARD_REV_EXACT OR NOT DEFINED ACTIVE_BOARD_REVISION)
message(FATAL_ERROR "Board revision `${BOARD_REVISION}` for board \
`${BOARD}` not found. Please specify a valid board revision.")
endif()
set(ACTIVE_BOARD_REVISION ${ACTIVE_BOARD_REVISION} PARENT_SCOPE)
endfunction()
# 1.5. Misc.
# zephyr_check_compiler_flag is a part of Zephyr's toolchain
# infrastructure. It should be used when testing toolchain
# capabilities and it should normally be used in place of the
# functions:
#
# check_compiler_flag
# check_c_compiler_flag
# check_cxx_compiler_flag
#
# See check_compiler_flag() for API documentation as it has the same
# API.
#
# It is implemented as a wrapper on top of check_compiler_flag, which
# again wraps the CMake-builtin's check_c_compiler_flag and
# check_cxx_compiler_flag.
#
# It takes time to check for compatibility of flags against toolchains
# so we cache the capability test results in USER_CACHE_DIR (This
# caching comes in addition to the caching that CMake does in the
# build folder's CMakeCache.txt)
function(zephyr_check_compiler_flag lang option check)
# Check if the option is covered by any hardcoded check before doing
# an automated test.
zephyr_check_compiler_flag_hardcoded(${lang} "${option}" check exists)
if(exists)
set(check ${check} PARENT_SCOPE)
return()
endif()
# Locate the cache directory
set_ifndef(
ZEPHYR_TOOLCHAIN_CAPABILITY_CACHE_DIR
${USER_CACHE_DIR}/ToolchainCapabilityDatabase
)
# The toolchain capability database/cache is maintained as a
# directory of files. The filenames in the directory are keys, and
# the file contents are the values in this key-value store.
# We need to create a unique key wrt. testing the toolchain
# capability. This key must include everything that can affect the
# toolchain test.
#
# Also, to fit the key into a filename we calculate the MD5 sum of
# the key.
# The 'cacheformat' must be bumped if a bug in the caching mechanism
# is detected and all old keys must be invalidated.
set(cacheformat 3)
set(key_string "")
set(key_string "${key_string}${cacheformat}_")
set(key_string "${key_string}${TOOLCHAIN_SIGNATURE}_")
set(key_string "${key_string}${lang}_")
set(key_string "${key_string}${option}_")
set(key_string "${key_string}${CMAKE_REQUIRED_FLAGS}_")
string(MD5 key ${key_string})
# Check the cache
set(key_path ${ZEPHYR_TOOLCHAIN_CAPABILITY_CACHE_DIR}/${key})
if(EXISTS ${key_path})
file(READ
${key_path} # File to be read
key_value # Output variable
LIMIT 1 # Read at most 1 byte ('0' or '1')
)
set(${check} ${key_value} PARENT_SCOPE)
return()
endif()
# Flags that start with -Wno-<warning> can not be tested by
# check_compiler_flag, they will always pass, but -W<warning> can be
# tested, so to test -Wno-<warning> flags we test -W<warning>
# instead.
if("${option}" MATCHES "-Wno-(.*)")
set(possibly_translated_option -W${CMAKE_MATCH_1})
else()
set(possibly_translated_option ${option})
endif()
check_compiler_flag(${lang} "${possibly_translated_option}" inner_check)
set(${check} ${inner_check} PARENT_SCOPE)
# Populate the cache
if(NOT (EXISTS ${key_path}))
# This is racy. As often with race conditions, this one can easily be
# made worse and demonstrated with a simple delay:
# execute_process(COMMAND "sleep" "5")
# Delete the cache, add the sleep above and run twister with a
# large number of JOBS. Once it's done look at the log.txt file
# below and you will see that concurrent cmake processes created the
# same files multiple times.
# While there are a number of reasons why this race seems both very
# unlikely and harmless, let's play it safe anyway and write to a
# private, temporary file first. All modern filesystems seem to
# support at least one atomic rename API and cmake's file(RENAME
# ...) officially leverages that.
string(RANDOM LENGTH 8 tempsuffix)
file(
WRITE
"${key_path}_tmp_${tempsuffix}"
${inner_check}
)
file(
RENAME
"${key_path}_tmp_${tempsuffix}" "${key_path}"
)
# Populate a metadata file (only intended for trouble shooting)
# with information about the hash, the toolchain capability
# result, and the toolchain test.
file(
APPEND
${ZEPHYR_TOOLCHAIN_CAPABILITY_CACHE_DIR}/log.txt
"${inner_check} ${key} ${key_string}\n"
)
endif()
endfunction()
function(zephyr_check_compiler_flag_hardcoded lang option check exists)
# Various flags that are not supported for CXX may not be testable
# because they would produce a warning instead of an error during
# the test. Exclude them by toolchain-specific blocklist.
if((${lang} STREQUAL CXX) AND ("${option}" IN_LIST CXX_EXCLUDED_OPTIONS))
set(check 0 PARENT_SCOPE)
set(exists 1 PARENT_SCOPE)
else()
# There does not exist a hardcoded check for this option.
set(exists 0 PARENT_SCOPE)
endif()
endfunction(zephyr_check_compiler_flag_hardcoded)
# zephyr_linker_sources(<location> [SORT_KEY <sort_key>] <files>)
#
# <files> is one or more .ld formatted files whose contents will be
# copied/included verbatim into the given <location> in the global linker.ld.
# Preprocessor directives work inside <files>. Relative paths are resolved
# relative to the calling file, like zephyr_sources().
# <location> is one of
# NOINIT Inside the noinit output section.
# RWDATA Inside the data output section.
# RODATA Inside the rodata output section.
# ROM_START Inside the first output section of the image. This option is
# currently only available on ARM Cortex-M, ARM Cortex-R,
# x86, ARC, openisa_rv32m1, and RISC-V.
# Note: On RISC-V the rom_start section will be after vector section.
# RAM_SECTIONS Inside the RAMABLE_REGION GROUP, not initialized.
# DATA_SECTIONS Inside the RAMABLE_REGION GROUP, initialized.
# SECTIONS Near the end of the file. Don't use this when linking into
# RAMABLE_REGION, use RAM_SECTIONS instead.
# <sort_key> is an optional key to sort by inside of each location. The key must
# be alphanumeric, and the keys are sorted alphabetically. If no key is
# given, the key 'default' is used. Keys are case-sensitive.
#
# Use NOINIT, RWDATA, and RODATA unless they don't work for your use case.
#
# When placing into NOINIT, RWDATA, RODATA, ROM_START, the contents of the files
# will be placed inside an output section, so assume the section definition is
# already present, e.g.:
# _mysection_start = .;
# KEEP(*(.mysection));
# _mysection_end = .;
# _mysection_size = ABSOLUTE(_mysection_end - _mysection_start);
#
# When placing into SECTIONS, RAM_SECTIONS or DATA_SECTIONS, the files must
# instead define their own output sections to achieve the same thing:
# SECTION_PROLOGUE(.mysection,,)
# {
# _mysection_start = .;
# KEEP(*(.mysection))
# _mysection_end = .;
# } GROUP_LINK_IN(ROMABLE_REGION)
# _mysection_size = _mysection_end - _mysection_start;
#
# Note about the above examples: If the first example was used with RODATA, and
# the second with SECTIONS, the two examples do the same thing from a user
# perspective.
#
# Friendly reminder: Beware of the different ways the location counter ('.')
# behaves inside vs. outside section definitions.
function(zephyr_linker_sources location)
# Set up the paths to the destination files. These files are #included inside
# the global linker.ld.
set(snippet_base "${__build_dir}/include/generated")
set(sections_path "${snippet_base}/snippets-sections.ld")
set(ram_sections_path "${snippet_base}/snippets-ram-sections.ld")
set(data_sections_path "${snippet_base}/snippets-data-sections.ld")
set(rom_start_path "${snippet_base}/snippets-rom-start.ld")
set(noinit_path "${snippet_base}/snippets-noinit.ld")
set(rwdata_path "${snippet_base}/snippets-rwdata.ld")
set(rodata_path "${snippet_base}/snippets-rodata.ld")
# Clear destination files if this is the first time the function is called.
get_property(cleared GLOBAL PROPERTY snippet_files_cleared)
if (NOT DEFINED cleared)
file(WRITE ${sections_path} "")
file(WRITE ${ram_sections_path} "")
file(WRITE ${data_sections_path} "")
file(WRITE ${rom_start_path} "")
file(WRITE ${noinit_path} "")
file(WRITE ${rwdata_path} "")
file(WRITE ${rodata_path} "")
set_property(GLOBAL PROPERTY snippet_files_cleared true)
endif()
# Choose destination file, based on the <location> argument.
if ("${location}" STREQUAL "SECTIONS")
set(snippet_path "${sections_path}")
elseif("${location}" STREQUAL "RAM_SECTIONS")
set(snippet_path "${ram_sections_path}")
elseif("${location}" STREQUAL "DATA_SECTIONS")
set(snippet_path "${data_sections_path}")
elseif("${location}" STREQUAL "ROM_START")
set(snippet_path "${rom_start_path}")
elseif("${location}" STREQUAL "NOINIT")
set(snippet_path "${noinit_path}")
elseif("${location}" STREQUAL "RWDATA")
set(snippet_path "${rwdata_path}")
elseif("${location}" STREQUAL "RODATA")
set(snippet_path "${rodata_path}")
else()
message(fatal_error "Must choose valid location for linker snippet.")
endif()
cmake_parse_arguments(L "" "SORT_KEY" "" ${ARGN})
set(SORT_KEY default)
if(DEFINED L_SORT_KEY)
set(SORT_KEY ${L_SORT_KEY})
endif()
foreach(file IN ITEMS ${L_UNPARSED_ARGUMENTS})
# Resolve path.
if(IS_ABSOLUTE ${file})
set(path ${file})
else()
set(path ${CMAKE_CURRENT_SOURCE_DIR}/${file})
endif()
if(IS_DIRECTORY ${path})
message(FATAL_ERROR "zephyr_linker_sources() was called on a directory")
endif()
# Find the relative path to the linker file from the include folder.
file(RELATIVE_PATH relpath ${ZEPHYR_BASE}/include ${path})
# Create strings to be written into the file
set (include_str "/* Sort key: \"${SORT_KEY}\" */#include \"${relpath}\"")
# Add new line to existing lines, sort them, and write them back.
file(STRINGS ${snippet_path} lines) # Get current lines (without newlines).
list(APPEND lines ${include_str})
list(SORT lines)
string(REPLACE ";" "\n;" lines "${lines}") # Add newline to each line.
file(WRITE ${snippet_path} ${lines} "\n")
endforeach()
endfunction(zephyr_linker_sources)
# Helper function for CONFIG_CODE_DATA_RELOCATION
# Call this function with 2 arguments file and then memory location
function(zephyr_code_relocate file location)
if(NOT IS_ABSOLUTE ${file})
set(file ${CMAKE_CURRENT_SOURCE_DIR}/${file})
endif()
set_property(TARGET code_data_relocation_target
APPEND PROPERTY COMPILE_DEFINITIONS
"${location}:${file}")
endfunction()
# Usage:
# check_dtc_flag("-Wtest" DTC_WARN_TEST)
#
# Writes 1 to the output variable 'ok' if
# the flag is supported, otherwise writes 0.
#
# using
function(check_dtc_flag flag ok)
execute_process(
COMMAND
${DTC} ${flag} -v
ERROR_QUIET
OUTPUT_QUIET
RESULT_VARIABLE dtc_check_ret
)
if (dtc_check_ret EQUAL 0)
set(${ok} 1 PARENT_SCOPE)
else()
set(${ok} 0 PARENT_SCOPE)
endif()
endfunction()
# Function to round number to next power of two.
#
# Usage:
# pow2round(<variable>)
#
# Example:
# set(test 2)
# pow2round(test)
# # test is still 2
#
# set(test 5)
# pow2round(test)
# # test is now 8
#
# Arguments:
# n = Variable containing the number to round
function(pow2round n)
math(EXPR x "${${n}} & (${${n}} - 1)")
if(${x} EQUAL 0)
return()
endif()
math(EXPR ${n} "${${n}} | (${${n}} >> 1)")
math(EXPR ${n} "${${n}} | (${${n}} >> 2)")
math(EXPR ${n} "${${n}} | (${${n}} >> 4)")
math(EXPR ${n} "${${n}} | (${${n}} >> 8)")
math(EXPR ${n} "${${n}} | (${${n}} >> 16)")
math(EXPR ${n} "${${n}} | (${${n}} >> 32)")
math(EXPR ${n} "${${n}} + 1")
set(${n} ${${n}} PARENT_SCOPE)
endfunction()
########################################################
# 2. Kconfig-aware extensions
########################################################
#
# Kconfig is a configuration language developed for the Linux
# kernel. The below functions integrate CMake with Kconfig.
#
# 2.1 Misc
#
# import_kconfig(<prefix> <kconfig_fragment> [<keys>])
#
# Parse a KConfig fragment (typically with extension .config) and
# introduce all the symbols that are prefixed with 'prefix' into the
# CMake namespace. List all created variable names in the 'keys'
# output variable if present.
function(import_kconfig prefix kconfig_fragment)
# Parse the lines prefixed with 'prefix' in ${kconfig_fragment}
file(
STRINGS
${kconfig_fragment}
DOT_CONFIG_LIST
REGEX "^${prefix}"
ENCODING "UTF-8"
)
foreach (CONFIG ${DOT_CONFIG_LIST})
# CONFIG could look like: CONFIG_NET_BUF=y
# Match the first part, the variable name
string(REGEX MATCH "[^=]+" CONF_VARIABLE_NAME ${CONFIG})
# Match the second part, variable value
string(REGEX MATCH "=(.+$)" CONF_VARIABLE_VALUE ${CONFIG})
# The variable name match we just did included the '=' symbol. To just get the
# part on the RHS we use match group 1
set(CONF_VARIABLE_VALUE ${CMAKE_MATCH_1})
if("${CONF_VARIABLE_VALUE}" MATCHES "^\"(.*)\"$") # Is surrounded by quotes
set(CONF_VARIABLE_VALUE ${CMAKE_MATCH_1})
endif()
set("${CONF_VARIABLE_NAME}" "${CONF_VARIABLE_VALUE}" PARENT_SCOPE)
list(APPEND keys "${CONF_VARIABLE_NAME}")
endforeach()
foreach(outvar ${ARGN})
set(${outvar} "${keys}" PARENT_SCOPE)
endforeach()
endfunction()
########################################################
# 3. CMake-generic extensions
########################################################
#
# These functions extend the CMake API in a way that is not particular
# to Zephyr. Primarily they work around limitations in the CMake
# language to allow cleaner build scripts.
# 3.1. *_ifdef
#
# Functions for conditionally executing CMake functions with oneliners
# e.g.
#
# if(CONFIG_FFT)
# zephyr_library_source(
# fft_32.c
# fft_utils.c
# )
# endif()
#
# Becomes
#
# zephyr_source_ifdef(
# CONFIG_FFT
# fft_32.c
# fft_utils.c
# )
#
# More Generally
# "<function-name>_ifdef(CONDITION args)"
# Becomes
# """
# if(CONDITION)
# <function-name>(args)
# endif()
# """
#
# ifdef functions are added on an as-need basis. See
# https://cmake.org/cmake/help/latest/manual/cmake-commands.7.html for
# a list of available functions.
function(add_subdirectory_ifdef feature_toggle source_dir)
if(${${feature_toggle}})
add_subdirectory(${source_dir} ${ARGN})
endif()
endfunction()
function(target_sources_ifdef feature_toggle target scope item)
if(${${feature_toggle}})
target_sources(${target} ${scope} ${item} ${ARGN})
endif()
endfunction()
function(target_compile_definitions_ifdef feature_toggle target scope item)
if(${${feature_toggle}})
target_compile_definitions(${target} ${scope} ${item} ${ARGN})
endif()
endfunction()
function(target_include_directories_ifdef feature_toggle target scope item)
if(${${feature_toggle}})
target_include_directories(${target} ${scope} ${item} ${ARGN})
endif()
endfunction()
function(target_link_libraries_ifdef feature_toggle target item)
if(${${feature_toggle}})
target_link_libraries(${target} ${item} ${ARGN})
endif()
endfunction()
function(add_compile_option_ifdef feature_toggle option)
if(${${feature_toggle}})
add_compile_options(${option})
endif()
endfunction()
function(target_compile_option_ifdef feature_toggle target scope option)
if(${feature_toggle})
target_compile_options(${target} ${scope} ${option})
endif()
endfunction()
function(target_cc_option_ifdef feature_toggle target scope option)
if(${feature_toggle})
target_cc_option(${target} ${scope} ${option})
endif()
endfunction()
function(zephyr_library_sources_ifdef feature_toggle source)
if(${${feature_toggle}})
zephyr_library_sources(${source} ${ARGN})
endif()
endfunction()
function(zephyr_sources_ifdef feature_toggle)
if(${${feature_toggle}})
zephyr_sources(${ARGN})
endif()
endfunction()
function(zephyr_cc_option_ifdef feature_toggle)
if(${${feature_toggle}})
zephyr_cc_option(${ARGN})
endif()
endfunction()
function(zephyr_ld_option_ifdef feature_toggle)
if(${${feature_toggle}})
zephyr_ld_options(${ARGN})
endif()
endfunction()
function(zephyr_link_libraries_ifdef feature_toggle)
if(${${feature_toggle}})
zephyr_link_libraries(${ARGN})
endif()
endfunction()
function(zephyr_compile_options_ifdef feature_toggle)
if(${${feature_toggle}})
zephyr_compile_options(${ARGN})
endif()
endfunction()
function(zephyr_compile_definitions_ifdef feature_toggle)
if(${${feature_toggle}})
zephyr_compile_definitions(${ARGN})
endif()
endfunction()
function(zephyr_include_directories_ifdef feature_toggle)
if(${${feature_toggle}})
zephyr_include_directories(${ARGN})
endif()
endfunction()
function(zephyr_library_compile_definitions_ifdef feature_toggle item)
if(${${feature_toggle}})
zephyr_library_compile_definitions(${item} ${ARGN})
endif()
endfunction()
function(zephyr_library_include_directories_ifdef feature_toggle)
if(${${feature_toggle}})
zephyr_library_include_directories(${ARGN})
endif()
endfunction()
function(zephyr_library_compile_options_ifdef feature_toggle item)
if(${${feature_toggle}})
zephyr_library_compile_options(${item} ${ARGN})
endif()
endfunction()
function(zephyr_link_interface_ifdef feature_toggle interface)
if(${${feature_toggle}})
target_link_libraries(${interface} INTERFACE zephyr_interface)
endif()
endfunction()
function(zephyr_library_link_libraries_ifdef feature_toggle item)
if(${${feature_toggle}})
zephyr_library_link_libraries(${item})
endif()
endfunction()
function(zephyr_linker_sources_ifdef feature_toggle)
if(${${feature_toggle}})
zephyr_linker_sources(${ARGN})
endif()
endfunction()
macro(list_append_ifdef feature_toggle list)
if(${${feature_toggle}})
list(APPEND ${list} ${ARGN})
endif()
endmacro()
# 3.2. *_ifndef
# See 3.1 *_ifdef
function(set_ifndef variable value)
if(NOT ${variable})
set(${variable} ${value} ${ARGN} PARENT_SCOPE)
endif()
endfunction()
function(add_subdirectory_ifndef feature_toggle source_dir)
if(NOT ${feature_toggle})
add_subdirectory(${source_dir} ${ARGN})
endif()
endfunction()
function(target_sources_ifndef feature_toggle target scope item)
if(NOT ${feature_toggle})
target_sources(${target} ${scope} ${item} ${ARGN})
endif()
endfunction()
function(target_compile_definitions_ifndef feature_toggle target scope item)
if(NOT ${feature_toggle})
target_compile_definitions(${target} ${scope} ${item} ${ARGN})
endif()
endfunction()
function(target_include_directories_ifndef feature_toggle target scope item)
if(NOT ${feature_toggle})
target_include_directories(${target} ${scope} ${item} ${ARGN})
endif()
endfunction()
function(target_link_libraries_ifndef feature_toggle target item)
if(NOT ${feature_toggle})
target_link_libraries(${target} ${item} ${ARGN})
endif()
endfunction()
function(add_compile_option_ifndef feature_toggle option)
if(NOT ${feature_toggle})
add_compile_options(${option})
endif()
endfunction()
function(target_compile_option_ifndef feature_toggle target scope option)
if(NOT ${feature_toggle})
target_compile_options(${target} ${scope} ${option})
endif()
endfunction()
function(target_cc_option_ifndef feature_toggle target scope option)
if(NOT ${feature_toggle})
target_cc_option(${target} ${scope} ${option})
endif()
endfunction()
function(zephyr_library_sources_ifndef feature_toggle source)
if(NOT ${feature_toggle})
zephyr_library_sources(${source} ${ARGN})
endif()
endfunction()
function(zephyr_sources_ifndef feature_toggle)
if(NOT ${feature_toggle})
zephyr_sources(${ARGN})
endif()
endfunction()
function(zephyr_cc_option_ifndef feature_toggle)
if(NOT ${feature_toggle})
zephyr_cc_option(${ARGN})
endif()
endfunction()
function(zephyr_ld_option_ifndef feature_toggle)
if(NOT ${feature_toggle})
zephyr_ld_options(${ARGN})
endif()
endfunction()
function(zephyr_link_libraries_ifndef feature_toggle)
if(NOT ${feature_toggle})
zephyr_link_libraries(${ARGN})
endif()
endfunction()
function(zephyr_compile_options_ifndef feature_toggle)
if(NOT ${feature_toggle})
zephyr_compile_options(${ARGN})
endif()
endfunction()
function(zephyr_compile_definitions_ifndef feature_toggle)
if(NOT ${feature_toggle})
zephyr_compile_definitions(${ARGN})
endif()
endfunction()
function(zephyr_include_directories_ifndef feature_toggle)
if(NOT ${feature_toggle})
zephyr_include_directories(${ARGN})
endif()
endfunction()
function(zephyr_library_compile_definitions_ifndef feature_toggle item)
if(NOT ${feature_toggle})
zephyr_library_compile_definitions(${item} ${ARGN})
endif()
endfunction()
function(zephyr_library_include_directories_ifndef feature_toggle)
if(NOT ${feature_toggle})
zephyr_library_include_directories(${ARGN})
endif()
endfunction()
function(zephyr_library_compile_options_ifndef feature_toggle item)
if(NOT ${feature_toggle})
zephyr_library_compile_options(${item} ${ARGN})
endif()
endfunction()
function(zephyr_link_interface_ifndef feature_toggle interface)
if(NOT ${feature_toggle})
target_link_libraries(${interface} INTERFACE zephyr_interface)
endif()
endfunction()
function(zephyr_library_link_libraries_ifndef feature_toggle item)
if(NOT ${feature_toggle})
zephyr_library_link_libraries(${item})
endif()
endfunction()
function(zephyr_linker_sources_ifndef feature_toggle)
if(NOT ${feature_toggle})
zephyr_linker_sources(${ARGN})
endif()
endfunction()
macro(list_append_ifndef feature_toggle list)
if(NOT ${feature_toggle})
list(APPEND ${list} ${ARGN})
endif()
endmacro()
# 3.3. *_option Compiler-compatibility checks
#
# Utility functions for silently omitting compiler flags when the
# compiler lacks support. *_cc_option was ported from KBuild, see
# cc-option in
# https://www.kernel.org/doc/Documentation/kbuild/makefiles.txt
# Writes 1 to the output variable 'ok' for the language 'lang' if
# the flag is supported, otherwise writes 0.
#
# lang must be C or CXX
#
# TODO: Support ASM
#
# Usage:
#
# check_compiler_flag(C "-Wall" my_check)
# print(my_check) # my_check is now 1
function(check_compiler_flag lang option ok)
if(NOT DEFINED CMAKE_REQUIRED_QUIET)
set(CMAKE_REQUIRED_QUIET 1)
endif()
string(MAKE_C_IDENTIFIER
check${option}_${lang}_${CMAKE_REQUIRED_FLAGS}
${ok}
)
if(${lang} STREQUAL C)
check_c_compiler_flag("${option}" ${${ok}})
else()
check_cxx_compiler_flag("${option}" ${${ok}})
endif()
if(${${${ok}}})
set(ret 1)
else()
set(ret 0)
endif()
set(${ok} ${ret} PARENT_SCOPE)
endfunction()
function(target_cc_option target scope option)
target_cc_option_fallback(${target} ${scope} ${option} "")
endfunction()
# Support an optional second option for when the first option is not
# supported.
function(target_cc_option_fallback target scope option1 option2)
if(CONFIG_CPLUSPLUS)
foreach(lang C CXX)
# For now, we assume that all flags that apply to C/CXX also
# apply to ASM.
zephyr_check_compiler_flag(${lang} ${option1} check)
if(${check})
target_compile_options(${target} ${scope}
$<$<COMPILE_LANGUAGE:${lang}>:${option1}>
$<$<COMPILE_LANGUAGE:ASM>:${option1}>
)
elseif(option2)
target_compile_options(${target} ${scope}
$<$<COMPILE_LANGUAGE:${lang}>:${option2}>
$<$<COMPILE_LANGUAGE:ASM>:${option2}>
)
endif()
endforeach()
else()
zephyr_check_compiler_flag(C ${option1} check)
if(${check})
target_compile_options(${target} ${scope} ${option1})
elseif(option2)
target_compile_options(${target} ${scope} ${option2})
endif()
endif()
endfunction()
function(target_ld_options target scope)
zephyr_get_parse_args(args ${ARGN})
list(REMOVE_ITEM ARGN NO_SPLIT)
foreach(option ${ARGN})
if(args_NO_SPLIT)
set(option ${ARGN})
endif()
string(JOIN "" check_identifier "check" ${option})
string(MAKE_C_IDENTIFIER ${check_identifier} check)
set(SAVED_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
string(JOIN " " CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS} ${option})
zephyr_check_compiler_flag(C "" ${check})
set(CMAKE_REQUIRED_FLAGS ${SAVED_CMAKE_REQUIRED_FLAGS})
target_link_libraries_ifdef(${check} ${target} ${scope} ${option})
if(args_NO_SPLIT)
break()
endif()
endforeach()
endfunction()
# 3.3.1 Toolchain integration
#
# 'toolchain_parse_make_rule' is a function that parses the output of
# 'gcc -M'.
#
# The argument 'input_file' is in input parameter with the path to the
# file with the dependency information.
#
# The argument 'include_files' is an output parameter with the result
# of parsing the include files.
function(toolchain_parse_make_rule input_file include_files)
file(READ ${input_file} input)
# The file is formatted like this:
# empty_file.o: misc/empty_file.c \
# nrf52840dk_nrf52840/nrf52840dk_nrf52840.dts \
# nrf52840_qiaa.dtsi
# Get rid of the backslashes
string(REPLACE "\\" ";" input_as_list ${input})
# Pop the first line and treat it specially
list(GET input_as_list 0 first_input_line)
string(FIND ${first_input_line} ": " index)
math(EXPR j "${index} + 2")
string(SUBSTRING ${first_input_line} ${j} -1 first_include_file)
list(REMOVE_AT input_as_list 0)
list(APPEND result ${first_include_file})
# Add the other lines
list(APPEND result ${input_as_list})
# Strip away the newlines and whitespaces
list(TRANSFORM result STRIP)
set(${include_files} ${result} PARENT_SCOPE)
endfunction()
# 'check_set_linker_property' is a function that check the provided linker
# flag and only set the linker property if the check succeeds
#
# This function is similar in nature to the CMake set_property function, but
# with the extension that it will check that the linker supports the flag before
# setting the property.
#
# APPEND: Flag indicated that the property should be appended to the existing
# value list for the property.
# TARGET: Name of target on which to add the property (commonly: linker)
# PROPERTY: Name of property with the value(s) following immediately after
# property name
function(check_set_linker_property)
set(options APPEND)
set(single_args TARGET)
set(multi_args PROPERTY)
cmake_parse_arguments(LINKER_PROPERTY "${options}" "${single_args}" "${multi_args}" ${ARGN})
if(LINKER_PROPERTY_APPEND)
set(APPEND "APPEND")
endif()
list(GET LINKER_PROPERTY_PROPERTY 0 property)
list(REMOVE_AT LINKER_PROPERTY_PROPERTY 0)
set(option ${LINKER_PROPERTY_PROPERTY})
string(MAKE_C_IDENTIFIER check${option} check)
set(SAVED_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${option}")
zephyr_check_compiler_flag(C "" ${check})
set(CMAKE_REQUIRED_FLAGS ${SAVED_CMAKE_REQUIRED_FLAGS})
if(${check})
set_property(TARGET ${LINKER_PROPERTY_TARGET} ${APPEND} PROPERTY ${property} ${option})
endif()
endfunction()
# 'set_compiler_property' is a function that sets the property for the C and
# C++ property targets used for toolchain abstraction.
#
# This function is similar in nature to the CMake set_property function, but
# with the extension that it will set the property on both the compile and
# compiler-cpp targets.
#
# APPEND: Flag indicated that the property should be appended to the existing
# value list for the property.
# PROPERTY: Name of property with the value(s) following immediately after
# property name
function(set_compiler_property)
set(options APPEND)
set(multi_args PROPERTY)
cmake_parse_arguments(COMPILER_PROPERTY "${options}" "${single_args}" "${multi_args}" ${ARGN})
if(COMPILER_PROPERTY_APPEND)
set(APPEND "APPEND")
set(APPEND-CPP "APPEND")
endif()
set_property(TARGET compiler ${APPEND} PROPERTY ${COMPILER_PROPERTY_PROPERTY})
set_property(TARGET compiler-cpp ${APPEND} PROPERTY ${COMPILER_PROPERTY_PROPERTY})
endfunction()
# 'check_set_compiler_property' is a function that check the provided compiler
# flag and only set the compiler or compiler-cpp property if the check succeeds
#
# This function is similar in nature to the CMake set_property function, but
# with the extension that it will check that the compiler supports the flag
# before setting the property on compiler or compiler-cpp targets.
#
# APPEND: Flag indicated that the property should be appended to the existing
# value list for the property.
# PROPERTY: Name of property with the value(s) following immediately after
# property name
function(check_set_compiler_property)
set(options APPEND)
set(multi_args PROPERTY)
cmake_parse_arguments(COMPILER_PROPERTY "${options}" "${single_args}" "${multi_args}" ${ARGN})
if(COMPILER_PROPERTY_APPEND)
set(APPEND "APPEND")
set(APPEND-CPP "APPEND")
endif()
list(GET COMPILER_PROPERTY_PROPERTY 0 property)
list(REMOVE_AT COMPILER_PROPERTY_PROPERTY 0)
foreach(option ${COMPILER_PROPERTY_PROPERTY})
if(CONFIG_CPLUSPLUS)
zephyr_check_compiler_flag(CXX ${option} check)
if(${check})
set_property(TARGET compiler-cpp ${APPEND-CPP} PROPERTY ${property} ${option})
set(APPEND-CPP "APPEND")
endif()
endif()
zephyr_check_compiler_flag(C ${option} check)
if(${check})
set_property(TARGET compiler ${APPEND} PROPERTY ${property} ${option})
set(APPEND "APPEND")
endif()
endforeach()
endfunction()
# 3.4. Debugging CMake
# Usage:
# print(BOARD)
#
# will print: "BOARD: nrf52dk_nrf52832"
function(print arg)
message(STATUS "${arg}: ${${arg}}")
endfunction()
# Usage:
# assert(ZEPHYR_TOOLCHAIN_VARIANT "ZEPHYR_TOOLCHAIN_VARIANT not set.")
#
# will cause a FATAL_ERROR and print an error message if the first
# expression is false
macro(assert test comment)
if(NOT ${test})
message(FATAL_ERROR "Assertion failed: ${comment}")
endif()
endmacro()
# Usage:
# assert_not(OBSOLETE_VAR "OBSOLETE_VAR has been removed; use NEW_VAR instead")
#
# will cause a FATAL_ERROR and print an error message if the first
# expression is true
macro(assert_not test comment)
if(${test})
message(FATAL_ERROR "Assertion failed: ${comment}")
endif()
endmacro()
# Usage:
# assert_exists(CMAKE_READELF)
#
# will cause a FATAL_ERROR if there is no file or directory behind the
# variable
macro(assert_exists var)
if(NOT EXISTS ${${var}})
message(FATAL_ERROR "No such file or directory: ${var}: '${${var}}'")
endif()
endmacro()
# 3.5. File system management
function(check_if_directory_is_writeable dir ok)
execute_process(
COMMAND
${PYTHON_EXECUTABLE}
${ZEPHYR_BASE}/scripts/dir_is_writeable.py
${dir}
RESULT_VARIABLE ret
)
if("${ret}" STREQUAL "0")
# The directory is write-able
set(${ok} 1 PARENT_SCOPE)
else()
set(${ok} 0 PARENT_SCOPE)
endif()
endfunction()
function(find_appropriate_cache_directory dir)
set(env_suffix_LOCALAPPDATA .cache)
if(CMAKE_HOST_APPLE)
# On macOS, ~/Library/Caches is the preferred cache directory.
set(env_suffix_HOME Library/Caches)
else()
set(env_suffix_HOME .cache)
endif()
# Determine which env vars should be checked
if(CMAKE_HOST_APPLE)
set(dirs HOME)
elseif(CMAKE_HOST_WIN32)
set(dirs LOCALAPPDATA)
else()
# Assume Linux when we did not detect 'mac' or 'win'
#
# On Linux, freedesktop.org recommends using $XDG_CACHE_HOME if
# that is defined and defaulting to $HOME/.cache otherwise.
set(dirs
XDG_CACHE_HOME
HOME
)
endif()
foreach(env_var ${dirs})
if(DEFINED ENV{${env_var}})
set(env_dir $ENV{${env_var}})
set(test_user_dir ${env_dir}/${env_suffix_${env_var}})
check_if_directory_is_writeable(${test_user_dir} ok)
if(${ok})
# The directory is write-able
set(user_dir ${test_user_dir})
break()
else()
# The directory was not writeable, keep looking for a suitable
# directory
endif()
endif()
endforeach()
# Populate local_dir with a suitable directory for caching
# files. Prefer a directory outside of the git repository because it
# is good practice to have clean git repositories.
if(DEFINED user_dir)
# Zephyr's cache files go in the "zephyr" subdirectory of the
# user's cache directory.
set(local_dir ${user_dir}/zephyr)
else()
set(local_dir ${ZEPHYR_BASE}/.cache)
endif()
set(${dir} ${local_dir} PARENT_SCOPE)
endfunction()
function(generate_unique_target_name_from_filename filename target_name)
get_filename_component(basename ${filename} NAME)
string(REPLACE "." "_" x ${basename})
string(REPLACE "@" "_" x ${x})
string(MD5 unique_chars ${filename})
set(${target_name} gen_${x}_${unique_chars} PARENT_SCOPE)
endfunction()
# Usage:
# zephyr_file(<mode> <arg> ...)
#
# Zephyr file function extension.
# This function currently support the following <modes>
#
# APPLICATION_ROOT <path>: Check all paths in provided variable, and convert
# those paths that are defined with `-D<path>=<val>`
# to absolute path, relative from `APPLICATION_SOURCE_DIR`
# Issue an error for any relative path not specified
# by user with `-D<path>`
#
# CONF_FILES <path>: Find all configuration files in path and return them in a
# list. Configuration files will be:
# - DTS: Overlay files (.overlay)
# - Kconfig: Config fragments (.conf)
# The conf file search will return existing configuration
# files for the current board.
# CONF_FILES takes the following additional arguments:
# BOARD <board>: Find configuration files for specified board.
# BOARD_REVISION <revision>: Find configuration files for specified board
# revision. Requires BOARD to be specified.
#
# If no board is given the current BOARD and
# BOARD_REVISION will be used.
#
# DTS <list>: List to populate with DTS overlay files
# KCONF <list>: List to populate with Kconfig fragment files
# BUILD <type>: Build type to include for search.
# For example:
# BUILD debug, will look for <board>_debug.conf
# and <board>_debug.overlay, instead of <board>.conf
#
# returns an updated list of absolute paths
function(zephyr_file)
set(file_options APPLICATION_ROOT CONF_FILES)
if((ARGC EQUAL 0) OR (NOT (ARGV0 IN_LIST file_options)))
message(FATAL_ERROR "No <mode> given to `zephyr_file(<mode> <args>...)` function,\n \
Please provide one of following: APPLICATION_ROOT, CONF_FILES")
endif()
if(${ARGV0} STREQUAL APPLICATION_ROOT)
set(single_args APPLICATION_ROOT)
elseif(${ARGV0} STREQUAL CONF_FILES)
set(single_args CONF_FILES BOARD BOARD_REVISION DTS KCONF BUILD)
endif()
cmake_parse_arguments(FILE "" "${single_args}" "" ${ARGN})
if(FILE_UNPARSED_ARGUMENTS)
message(FATAL_ERROR "zephyr_file(${ARGV0} <path> ...) given unknown arguments: ${FILE_UNPARSED_ARGUMENTS}")
endif()
if(FILE_APPLICATION_ROOT)
# Note: user can do: `-D<var>=<relative-path>` and app can at same
# time specify `list(APPEND <var> <abs-path>)`
# Thus need to check and update only CACHED variables (-D<var>).
set(CACHED_PATH $CACHE{${FILE_APPLICATION_ROOT}})
foreach(path ${CACHED_PATH})
# The cached variable is relative path, i.e. provided by `-D<var>` or
# `set(<var> CACHE)`, so let's update current scope variable to absolute
# path from `APPLICATION_SOURCE_DIR`.
if(NOT IS_ABSOLUTE ${path})
set(abs_path ${APPLICATION_SOURCE_DIR}/${path})
list(FIND ${FILE_APPLICATION_ROOT} ${path} index)
if(NOT ${index} LESS 0)
list(REMOVE_AT ${FILE_APPLICATION_ROOT} ${index})
list(INSERT ${FILE_APPLICATION_ROOT} ${index} ${abs_path})
endif()
endif()
endforeach()
# Now all cached relative paths has been updated.
# Let's check if anyone uses relative path as scoped variable, and fail
foreach(path ${${FILE_APPLICATION_ROOT}})
if(NOT IS_ABSOLUTE ${path})
message(FATAL_ERROR
"Relative path encountered in scoped variable: ${FILE_APPLICATION_ROOT}, value=${path}\n \
Please adjust any `set(${FILE_APPLICATION_ROOT} ${path})` or `list(APPEND ${FILE_APPLICATION_ROOT} ${path})`\n \
to absolute path using `\${CMAKE_CURRENT_SOURCE_DIR}/${path}` or similar. \n \
Relative paths are only allowed with `-D${ARGV1}=<path>`")
endif()
endforeach()
# This updates the provided argument in parent scope (callers scope)
set(${FILE_APPLICATION_ROOT} ${${FILE_APPLICATION_ROOT}} PARENT_SCOPE)
endif()
if(FILE_CONF_FILES)
if(DEFINED FILE_BOARD_REVISION AND NOT FILE_BOARD)
message(FATAL_ERROR
"zephyr_file(${ARGV0} <path> BOARD_REVISION ${FILE_BOARD_REVISION} ...)"
" given without BOARD argument, please specify BOARD"
)
endif()
if(NOT DEFINED FILE_BOARD)
# Defaulting to system wide settings when BOARD is not given as argument
set(FILE_BOARD ${BOARD})
if(DEFINED BOARD_REVISION)
set(FILE_BOARD_REVISION ${BOARD_REVISION})
endif()
endif()
set(FILENAMES ${FILE_BOARD})
if(DEFINED FILE_BOARD_REVISION)
string(REPLACE "." "_" revision_string ${FILE_BOARD_REVISION})
list(APPEND FILENAMES "${FILE_BOARD}_${revision_string}")
endif()
if(FILE_DTS)
foreach(filename ${FILENAMES})
if(EXISTS ${FILE_CONF_FILES}/${filename}.overlay)
list(APPEND ${FILE_DTS} ${FILE_CONF_FILES}/${filename}.overlay)
endif()
endforeach()
# This updates the provided list in parent scope (callers scope)
set(${FILE_DTS} ${${FILE_DTS}} PARENT_SCOPE)
endif()
if(FILE_KCONF)
foreach(filename ${FILENAMES})
if(FILE_BUILD)
set(filename "${filename}_${FILE_BUILD}")
endif()
if(EXISTS ${FILE_CONF_FILES}/${filename}.conf)
list(APPEND ${FILE_KCONF} ${FILE_CONF_FILES}/${filename}.conf)
endif()
endforeach()
# This updates the provided list in parent scope (callers scope)
set(${FILE_KCONF} ${${FILE_KCONF}} PARENT_SCOPE)
endif()
endif()
endfunction()
# Usage:
# zephyr_string(<mode> <out-var> <input> ...)
#
# Zephyr string function extension.
# This function extends the CMake string function by providing additional
# manipulation arguments to CMake string.
#
# SANITIZE: Ensure that the output string does not contain any special
# characters. Special characters, such as -, +, =, $, etc. are
# converted to underscores '_'.
#
# SANITIZE TOUPPER: Ensure that the output string does not contain any special
# characters. Special characters, such as -, +, =, $, etc. are
# converted to underscores '_'.
# The sanitized string will be returned in UPPER case.
#
# returns the updated string
function(zephyr_string)
set(options SANITIZE TOUPPER)
cmake_parse_arguments(ZEPHYR_STRING "${options}" "" "" ${ARGN})
if (NOT ZEPHYR_STRING_UNPARSED_ARGUMENTS)
message(FATAL_ERROR "Function zephyr_string() called without a return variable")
endif()
list(GET ZEPHYR_STRING_UNPARSED_ARGUMENTS 0 return_arg)
list(REMOVE_AT ZEPHYR_STRING_UNPARSED_ARGUMENTS 0)
list(JOIN ZEPHYR_STRING_UNPARSED_ARGUMENTS "" work_string)
if(ZEPHYR_STRING_SANITIZE)
string(REGEX REPLACE "[^a-zA-Z0-9_]" "_" work_string ${work_string})
endif()
if(ZEPHYR_STRING_TOUPPER)
string(TOUPPER ${work_string} work_string)
endif()
set(${return_arg} ${work_string} PARENT_SCOPE)
endfunction()
# Usage:
# zephyr_check_cache(<variable> [REQUIRED])
#
# Check the current CMake cache for <variable> and warn the user if the value
# is being modified.
#
# This can be used to ensure the user does not accidentally try to change
# Zephyr build variables, such as:
# - BOARD
# - SHIELD
#
# variable: Name of <variable> to check and set, for example BOARD.
# REQUIRED: Optional flag. If specified, then an unset <variable> will be
# treated as an error.
# WATCH: Optional flag. If specified, watch the variable and print a warning if
# the variable is later being changed.
#
# Details:
# <variable> can be set by 3 sources.
# - Using CMake argument, -D<variable>
# - Using an environment variable
# - In the project CMakeLists.txt before `find_package(Zephyr)`.
#
# CLI has the highest precedence, then comes environment variables,
# and then finally CMakeLists.txt.
#
# The value defined on the first CMake invocation will be stored in the CMake
# cache as CACHED_<variable>. This allows the Zephyr build system to detect
# when a user reconfigures a sticky variable.
#
# A user can ignore all the precedence rules if the same source is always used
# E.g. always specifies -D<variable>= on the command line,
# always has an environment <variable> set, or always has a set(<variable> foo)
# line in his CMakeLists.txt and avoids mixing sources.
#
# The selected <variable> can be accessed through the variable '<variable>' in
# following Zephyr CMake code.
#
# If the user tries to change <variable> to a new value, then a warning will
# be printed, and the previously cached value (CACHED_<variable>) will be
# used, as it has precedence.
#
# Together with the warning, user is informed that in order to change
# <variable> the build directory must be cleaned.
#
function(zephyr_check_cache variable)
cmake_parse_arguments(CACHE_VAR "REQUIRED;WATCH" "" "" ${ARGN})
string(TOLOWER ${variable} variable_text)
string(REPLACE "_" " " variable_text ${variable_text})
get_property(cached_value CACHE ${variable} PROPERTY VALUE)
# If the build has already been configured in an earlier CMake invocation,
# then CACHED_${variable} is set. The CACHED_${variable} setting takes
# precedence over any user or CMakeLists.txt input.
# If we detect that user tries to change the setting, then print a warning
# that a pristine build is needed.
# If user uses -D<variable>=<new_value>, then cli_argument will hold the new
# value, otherwise cli_argument will hold the existing (old) value.
set(cli_argument ${cached_value})
if(cli_argument STREQUAL CACHED_${variable})
# The is no changes to the <variable> value.
unset(cli_argument)
endif()
set(app_cmake_lists ${${variable}})
if(cached_value STREQUAL ${variable})
# The app build scripts did not set a default, The BOARD we are
# reading is the cached value from the CLI
unset(app_cmake_lists)
endif()
if(DEFINED CACHED_${variable})
# Warn the user if it looks like he is trying to change the board
# without cleaning first
if(cli_argument)
if(NOT ((CACHED_${variable} STREQUAL cli_argument) OR (${variable}_DEPRECATED STREQUAL cli_argument)))
message(WARNING "The build directory must be cleaned pristinely when "
"changing ${variable_text},\n"
"Current value=\"${CACHED_${variable}}\", "
"Ignored value=\"${cli_argument}\"")
endif()
endif()
if(CACHED_${variable})
set(${variable} ${CACHED_${variable}} PARENT_SCOPE)
# This resets the user provided value with previous (working) value.
set(${variable} ${CACHED_${variable}} CACHE STRING "Selected ${variable_text}" FORCE)
else()
unset(${variable} PARENT_SCOPE)
unset(${variable} CACHE)
endif()
elseif(cli_argument)
set(${variable} ${cli_argument})
elseif(DEFINED ENV{${variable}})
set(${variable} $ENV{${variable}})
elseif(app_cmake_lists)
set(${variable} ${app_cmake_lists})
elseif(${CACHE_VAR_REQUIRED})
message(FATAL_ERROR "${variable} is not being defined on the CMake command-line in the environment or by the app.")
endif()
# Store the specified variable in parent scope and the cache
set(${variable} ${${variable}} PARENT_SCOPE)
set(CACHED_${variable} ${${variable}} CACHE STRING "Selected ${variable_text}")
if(CACHE_VAR_WATCH)
# The variable is now set to its final value.
zephyr_boilerplate_watch(${variable})
endif()
endfunction(zephyr_check_cache variable)
# Usage:
# zephyr_boilerplate_watch(SOME_BOILERPLATE_VAR)
#
# Inform the build system that SOME_BOILERPLATE_VAR, a variable
# handled in cmake/app/boilerplate.cmake, is now fixed and should no
# longer be changed.
#
# This function uses variable_watch() to print a noisy warning
# if the variable is set after it returns.
function(zephyr_boilerplate_watch variable)
variable_watch(${variable} zephyr_variable_set_too_late)
endfunction()
function(zephyr_variable_set_too_late variable access value current_list_file)
if (access STREQUAL "MODIFIED_ACCESS")
message(WARNING
"
**********************************************************************
*
* WARNING
*
* CMake variable ${variable} set to \"${value}\" in:
* ${current_list_file}
*
* This is too late to make changes! The change was ignored.
*
* Hint: ${variable} must be set before calling find_package(Zephyr ...).
*
**********************************************************************
")
endif()
endfunction()
# Usage:
# zephyr_get_targets(<directory> <types> <targets>)
#
# Get build targets for a given directory and sub-directories.
#
# This functions will traverse the build tree, starting from <directory>.
# It will read the `BUILDSYSTEM_TARGETS` for each directory in the build tree
# and return the build types matching the <types> list.
# Example of types: OBJECT_LIBRARY, STATIC_LIBRARY, INTERFACE_LIBRARY, UTILITY.
#
# returns a list of targets in <targets> matching the required <types>.
function(zephyr_get_targets directory types targets)
get_property(sub_directories DIRECTORY ${directory} PROPERTY SUBDIRECTORIES)
get_property(dir_targets DIRECTORY ${directory} PROPERTY BUILDSYSTEM_TARGETS)
foreach(dir_target ${dir_targets})
get_property(target_type TARGET ${dir_target} PROPERTY TYPE)
if(${target_type} IN_LIST types)
list(APPEND ${targets} ${dir_target})
endif()
endforeach()
foreach(directory ${sub_directories})
zephyr_get_targets(${directory} "${types}" ${targets})
endforeach()
set(${targets} ${${targets}} PARENT_SCOPE)
endfunction()
# Usage:
# target_byproducts(TARGET <target> BYPRODUCTS <file> [<file>...])
#
# Specify additional BYPRODUCTS that this target produces.
#
# This function allows the build system to specify additional byproducts to
# target created with `add_executable()`. When linking an executable the linker
# may produce additional files, like map files. Those files are not known to the
# build system. This function makes it possible to describe such additional
# byproducts in an easy manner.
function(target_byproducts)
cmake_parse_arguments(TB "" "TARGET" "BYPRODUCTS" ${ARGN})
if(NOT DEFINED TB_TARGET)
message(FATAL_ERROR "target_byproducts() missing parameter: TARGET <target>")
endif()
add_custom_command(TARGET ${TB_TARGET}
POST_BUILD COMMAND ${CMAKE_COMMAND} -E echo ""
BYPRODUCTS ${TB_BYPRODUCTS}
COMMENT "Logical command for additional byproducts on target: ${TB_TARGET}"
)
endfunction()
########################################################
# 4. Zephyr devicetree function
########################################################
# 4.1. dt_*
#
# The following methods are for retrieving devicetree information in CMake.
#
# Note: In CMake we refer to the nodes using the node's path, therefore there
# is no dt_path(...) function for obtaining a node identifier.
# Usage:
# dt_nodelabel(<var> NODELABEL <label>)
#
# Function for retrieving the node path for the node having nodelabel
# <label>.
#
# Example devicetree fragment:
#
# / {
# soc {
# nvic: interrupt-controller@e000e100 { ... };
# };
# };
#
# Example usage:
#
# # Sets 'nvic_path' to "/soc/interrupt-controller@e000e100"
# dt_nodelabel(nvic_path NODELABEL "nvic")
#
# The node's path will be returned in the <var> parameter.
# <var> will be undefined if node does not exist.
#
# <var> : Return variable where the node path will be stored
# NODELABEL <label> : Node label
function(dt_nodelabel var)
set(req_single_args "NODELABEL")
cmake_parse_arguments(DT_LABEL "" "${req_single_args}" "" ${ARGN})
if(${ARGV0} IN_LIST req_single_args)
message(FATAL_ERROR "dt_nodelabel(${ARGV0} ...) missing return parameter.")
endif()
foreach(arg ${req_single_args})
if(NOT DEFINED DT_LABEL_${arg})
message(FATAL_ERROR "dt_nodelabel(${ARGV0} ...) "
"missing required argument: ${arg}"
)
endif()
endforeach()
get_target_property(${var} devicetree_target "DT_NODELABEL|${DT_LABEL_NODELABEL}")
if(${${var}} STREQUAL ${var}-NOTFOUND)
set(${var})
endif()
set(${var} ${${var}} PARENT_SCOPE)
endfunction()
# Usage:
# dt_node_exists(<var> PATH <path>)
#
# Tests whether a node with path <path> exists in the devicetree.
#
# The result of the check, either TRUE or FALSE, will be returned in
# the <var> parameter.
#
# <var> : Return variable where the check result will be returned
# PATH <path> : Node path
function(dt_node_exists var)
set(req_single_args "PATH")
cmake_parse_arguments(DT_NODE "" "${req_single_args}" "" ${ARGN})
if(${ARGV0} IN_LIST req_single_args)
message(FATAL_ERROR "dt_node_existsl(${ARGV0} ...) missing return parameter.")
endif()
foreach(arg ${req_single_args})
if(NOT DEFINED DT_NODE_${arg})
message(FATAL_ERROR "dt_node_exists(${ARGV0} ...) "
"missing required argument: ${arg}"
)
endif()
endforeach()
get_target_property(${var} devicetree_target "DT_NODE|${DT_NODE_PATH}")
if(${var})
set(${var} ${${var}} PARENT_SCOPE)
else()
set(${var} FALSE PARENT_SCOPE)
endif()
endfunction()
# Usage:
# dt_node_has_status(<var> PATH <path> STATUS <status>)
#
# Tests whether <path> refers to a node which:
# - exists in the devicetree, and
# - has a status property matching the <status> argument
# (a missing status or an “ok” status is treated as if it
# were “okay” instead)
#
# The result of the check, either TRUE or FALSE, will be returned in
# the <var> parameter.
#
# <var> : Return variable where the check result will be returned
# PATH <path> : Node path
# STATUS <status> : Status to check
function(dt_node_has_status var)
set(req_single_args "PATH;STATUS")
cmake_parse_arguments(DT_NODE "" "${req_single_args}" "" ${ARGN})
if(${ARGV0} IN_LIST req_single_args)
message(FATAL_ERROR "dt_node_has_status(${ARGV0} ...) missing return parameter.")
endif()
foreach(arg ${req_single_args})
if(NOT DEFINED DT_NODE_${arg})
message(FATAL_ERROR "dt_node_has_status(${ARGV0} ...) "
"missing required argument: ${arg}"
)
endif()
endforeach()
dt_node_exists(${var} PATH ${DT_NODE_PATH})
if(NOT ${${var}})
set(${var} FALSE PARENT_SCOPE)
endif()
dt_prop(${var} PATH ${DT_NODE_PATH} PROPERTY status)
if(NOT DEFINED ${var} OR "${${var}}" STREQUAL ok)
set(${var} okay)
endif()
if(${var} STREQUAL ${DT_NODE_STATUS})
set(${var} TRUE PARENT_SCOPE)
else()
set(${var} FALSE PARENT_SCOPE)
endif()
endfunction()
# Usage:
#
# dt_prop(<var> PATH <path> PROPERTY <prop> [INDEX <idx>])
#
# Get a devicetree property value. The value will be returned in the
# <var> parameter.
#
# This function currently only supports properties with the following
# devicetree binding types: string, int, boolean, array, uint8-array,
# string-array, path.
#
# For array valued properties (including uint8-array and
# string-array), the entire array is returned as a CMake list unless
# INDEX is given. If INDEX is given, just the array element at index
# <idx> is returned.
#
# The property value will be returned in the <var> parameter if the
# node exists and has a property <prop> with one of the above types.
# <var> will be undefined otherwise.
#
# To test if the property is defined before using it, use DEFINED on
# the return <var>, like this:
#
# dt_prop(reserved_ranges PATH "/soc/gpio@deadbeef" PROPERTY "gpio-reserved-ranges")
# if(DEFINED reserved_ranges)
# # Node exists and has the "gpio-reserved-ranges" property.
# endif()
#
# To distinguish a missing node from a missing property, combine
# dt_prop() and dt_node_exists(), like this:
#
# dt_node_exists(node_exists PATH "/soc/gpio@deadbeef")
# dt_prop(reserved_ranges PATH "/soc/gpio@deadbeef" PROPERTY "gpio-reserved-ranges")
# if(DEFINED reserved_ranges)
# # Node "/soc/gpio@deadbeef" exists and has the "gpio-reserved-ranges" property
# elseif(node_exists)
# # Node exists, but doesn't have the property, or the property has an unsupported type.
# endif()
#
# <var> : Return variable where the property value will be stored
# PATH <path> : Node path
# PROPERTY <prop>: Property for which a value should be returned, as it
# appears in the DTS source
# INDEX <idx> : Optional index when retrieving a value in an array property
function(dt_prop var)
set(req_single_args "PATH;PROPERTY")
set(single_args "INDEX")
cmake_parse_arguments(DT_PROP "" "${req_single_args};${single_args}" "" ${ARGN})
if(${ARGV0} IN_LIST req_single_args)
message(FATAL_ERROR "dt_prop(${ARGV0} ...) missing return parameter.")
endif()
foreach(arg ${req_single_args})
if(NOT DEFINED DT_PROP_${arg})
message(FATAL_ERROR "dt_prop(${ARGV0} ...) "
"missing required argument: ${arg}"
)
endif()
endforeach()
get_property(exists TARGET devicetree_target
PROPERTY "DT_PROP|${DT_PROP_PATH}|${DT_PROP_PROPERTY}"
SET
)
if(NOT exists)
set(${var} PARENT_SCOPE)
return()
endif()
get_target_property(val devicetree_target
"DT_PROP|${DT_PROP_PATH}|${DT_PROP_PROPERTY}"
)
if(DEFINED DT_PROP_INDEX)
list(GET val ${DT_PROP_INDEX} element)
set(${var} "${element}" PARENT_SCOPE)
else()
set(${var} "${val}" PARENT_SCOPE)
endif()
endfunction()
# Usage:
# dt_num_regs(<var> PATH <path>)
#
# Get the number of register blocks in the node's reg property;
# this may be zero.
#
# The value will be returned in the <var> parameter.
#
# <var> : Return variable where the property value will be stored
# PATH <path> : Node path
function(dt_num_regs var)
set(req_single_args "PATH")
cmake_parse_arguments(DT_REG "" "${req_single_args}" "" ${ARGN})
if(${ARGV0} IN_LIST req_single_args)
message(FATAL_ERROR "dt_num_regs(${ARGV0} ...) missing return parameter.")
endif()
foreach(arg ${req_single_args})
if(NOT DEFINED DT_REG_${arg})
message(FATAL_ERROR "dt_num_regs(${ARGV0} ...) "
"missing required argument: ${arg}"
)
endif()
endforeach()
get_target_property(${var} devicetree_target "DT_REG|${DT_REG_PATH}|NUM")
set(${var} ${${var}} PARENT_SCOPE)
endfunction()
# Usage:
# dt_reg_addr(<var> PATH <path> [INDEX <idx>])
#
# Get the base address of the register block at index <idx>.
# If <idx> is omitted, then the value at index 0 will be returned.
#
# The value will be returned in the <var> parameter.
#
# Results can be:
# - The base address of the register block
# - <var> will be undefined if node does not exists or does not have a register
# block at the requested index.
#
# <var> : Return variable where the address value will be stored
# PATH <path> : Node path
# INDEX <idx> : Index number
function(dt_reg_addr var)
set(req_single_args "PATH")
set(single_args "INDEX")
cmake_parse_arguments(DT_REG "" "${req_single_args};${single_args}" "" ${ARGN})
if(${ARGV0} IN_LIST req_single_args)
message(FATAL_ERROR "dt_reg_addr(${ARGV0} ...) missing return parameter.")
endif()
foreach(arg ${req_single_args})
if(NOT DEFINED DT_REG_${arg})
message(FATAL_ERROR "dt_reg_addr(${ARGV0} ...) "
"missing required argument: ${arg}"
)
endif()
endforeach()
if(NOT DEFINED DT_REG_INDEX)
set(DT_REG_INDEX 0)
endif()
get_target_property(${var}_list devicetree_target "DT_REG|${DT_REG_PATH}|ADDR")
list(GET ${var}_list ${DT_REG_INDEX} ${var})
if("${var}" STREQUAL NONE)
set(${var})
endif()
set(${var} ${${var}} PARENT_SCOPE)
endfunction()
# Usage:
# dt_reg_size(<var> PATH <path> [INDEX <idx>])
#
# Get the size of the register block at index <idx>.
# If INDEX is omitted, then the value at index 0 will be returned.
#
# The value will be returned in the <value> parameter.
#
# <var> : Return variable where the size value will be stored
# PATH <path> : Node path
# INDEX <idx> : Index number
function(dt_reg_size var)
set(req_single_args "PATH")
set(single_args "INDEX")
cmake_parse_arguments(DT_REG "" "${req_single_args};${single_args}" "" ${ARGN})
if(${ARGV0} IN_LIST req_single_args)
message(FATAL_ERROR "dt_reg_size(${ARGV0} ...) missing return parameter.")
endif()
foreach(arg ${req_single_args})
if(NOT DEFINED DT_REG_${arg})
message(FATAL_ERROR "dt_reg_size(${ARGV0} ...) "
"missing required argument: ${arg}"
)
endif()
endforeach()
if(NOT DEFINED DT_REG_INDEX)
set(DT_REG_INDEX 0)
endif()
get_target_property(${var}_list devicetree_target "DT_REG|${DT_REG_PATH}|SIZE")
list(GET ${var}_list ${DT_REG_INDEX} ${var})
if("${var}" STREQUAL NONE)
set(${var})
endif()
set(${var} ${${var}} PARENT_SCOPE)
endfunction()
# Usage:
# dt_has_chosen(<var> PROPERTY <prop>)
#
# Test if the devicetree's /chosen node has a given property
# <prop> which contains the path to a node.
#
# Example devicetree fragment:
#
# chosen {
# foo = &bar;
# };
#
# Example usage:
#
# # Sets 'result' to TRUE
# dt_has_chosen(result PROPERTY "foo")
#
# # Sets 'result' to FALSE
# dt_has_chosen(result PROPERTY "baz")
#
# The result of the check, either TRUE or FALSE, will be stored in the
# <var> parameter.
#
# <var> : Return variable
# PROPERTY <prop> : Chosen property
function(dt_has_chosen var)
set(req_single_args "PROPERTY")
cmake_parse_arguments(DT_CHOSEN "" "${req_single_args}" "" ${ARGN})
if(${ARGV0} IN_LIST req_single_args)
message(FATAL_ERROR "dt_has_chosen(${ARGV0} ...) missing return parameter.")
endif()
foreach(arg ${req_single_args})
if(NOT DEFINED DT_CHOSEN_${arg})
message(FATAL_ERROR "dt_has_chosen(${ARGV0} ...) "
"missing required argument: ${arg}"
)
endif()
endforeach()
get_target_property(exists devicetree_target "DT_CHOSEN|${DT_CHOSEN_PROPERTY}")
if(${exists} STREQUAL exists-NOTFOUND)
set(${var} FALSE PARENT_SCOPE)
else()
set(${var} TRUE PARENT_SCOPE)
endif()
endfunction()
# Usage:
# dt_chosen(<var> PROPERTY <prop>)
#
# Get a node path for a /chosen node property.
#
# the node path will be returned in the <value> parameter.
#
# <var> : Return variable where the node path will be stored
# PROPERTY <prop> : Chosen property
function(dt_chosen var)
set(req_single_args "PROPERTY")
cmake_parse_arguments(DT_CHOSEN "" "${req_single_args}" "" ${ARGN})
if(${ARGV0} IN_LIST req_single_args)
message(FATAL_ERROR "dt_has_chosen(${ARGV0} ...) missing return parameter.")
endif()
foreach(arg ${req_single_args})
if(NOT DEFINED DT_CHOSEN_${arg})
message(FATAL_ERROR "dt_chosen(${ARGV0} ...) "
"missing required argument: ${arg}"
)
endif()
endforeach()
get_target_property(${var} devicetree_target "DT_CHOSEN|${DT_CHOSEN_PROPERTY}")
if(${${var}} STREQUAL ${var}-NOTFOUND)
set(${var} PARENT_SCOPE)
else()
set(${var} ${${var}} PARENT_SCOPE)
endif()
endfunction()
########################################################
# 5. Zephyr linker function
########################################################
# 5.1. zephyr_linker*
#
# The following methods are for defining linker structure using CMake functions.
#
# This allows Zephyr developers to define linker sections and their content and
# have this configuration rendered into an appropriate linker script based on
# the toolchain in use.
# For example:
# ld linker scripts with GNU ld
# ARM scatter files with ARM linker.
#
# Example usage:
# zephyr_linker_section(
# NAME my_data
# VMA RAM
# LMA FLASH
# )
#
# and to configure special input sections for the section
# zephyr_linker_section_configure(
# SECTION my_data
# INPUT "my_custom_data"
# KEEP
# )
# Usage:
# zephyr_linker([FORMAT <format>]
# [ENTRY <entry symbol>]
# )
#
# Zephyr linker general settings.
# This function specifies general settings for the linker script to be generated.
#
# FORMAT <format>: The output format of the linked executable.
# ENTRY <entry symbolformat>: The code entry symbol.
#
function(zephyr_linker)
set(single_args "ENTRY;FORMAT")
cmake_parse_arguments(LINKER "" "${single_args}" "" ${ARGN})
if(LINKER_UNPARSED_ARGUMENTS)
message(FATAL_ERROR "zephyr_linker(${ARGV0} ...) given unknown "
"arguments: ${LINKER_UNPARSED_ARGUMENTS}"
)
endif()
if(DEFINED LINKER_FORMAT)
get_property(format_defined TARGET linker PROPERTY FORMAT SET)
if(format_defined)
message(FATAL_ERROR "zephyr_linker(FORMAT ...) already configured.")
else()
set_property(TARGET linker PROPERTY FORMAT ${LINKER_FORMAT})
endif()
endif()
if(DEFINED LINKER_ENTRY)
get_property(entry_defined TARGET linker PROPERTY ENTRY SET)
if(entry_defined)
message(FATAL_ERROR "zephyr_linker(ENTRY ...) already configured.")
else()
set_property(TARGET linker PROPERTY ENTRY ${LINKER_ENTRY})
endif()
endif()
endfunction()
# Usage:
# zephyr_linker_memory(NAME <name> START <address> SIZE <size> FLAGS <flags>)
#
# Zephyr linker memory.
# This function specifies a memory region for the platform in use.
#
# Note:
# This function should generally be called with values obtained from
# devicetree or Kconfig.
#
# NAME <name> : Name of the memory region, for example FLASH.
# START <address>: Start address of the memory region.
# Start address can be given as decimal or hex value.
# SIZE <size> : Size of the memory region.
# Size can be given as decimal value, hex value, or decimal with postfix k or m.
# All the following are valid values:
# 1048576, 0x10000, 1024k, 1024K, 1m, and 1M.
# FLAGS <flags> : Flags describing properties of the memory region.
# Currently supported:
# r: Read-only region
# w: Read-write region
# x: Executable region
# The flags r and x, or w and x may be combined like: rx, wx.
function(zephyr_linker_memory)
set(single_args "FLAGS;NAME;SIZE;START")
cmake_parse_arguments(MEMORY "" "${single_args}" "" ${ARGN})
if(MEMORY_UNPARSED_ARGUMENTS)
message(FATAL_ERROR "zephyr_linker_memory(${ARGV0} ...) given unknown "
"arguments: ${MEMORY_UNPARSED_ARGUMENTS}"
)
endif()
foreach(arg ${single_args})
if(NOT DEFINED MEMORY_${arg})
message(FATAL_ERROR "zephyr_linker_memory(${ARGV0} ...) missing required "
"argument: ${arg}"
)
endif()
endforeach()
set(MEMORY)
zephyr_linker_arg_val_list(MEMORY "${single_args}")
string(REPLACE ";" "\;" MEMORY "${MEMORY}")
set_property(TARGET linker
APPEND PROPERTY MEMORY_REGIONS "{${MEMORY}}"
)
endfunction()
# Usage:
# zephyr_linker_memory_ifdef(<setting> NAME <name> START <address> SIZE <size> FLAGS <flags>)
#
# Will create memory region if <setting> is enabled.
#
# <setting>: Setting to check for True value before invoking
# zephyr_linker_memory()
#
# See zephyr_linker_memory() description for other supported arguments.
#
macro(zephyr_linker_memory_ifdef feature_toggle)
if(${${feature_toggle}})
zephyr_linker_memory(${ARGN})
endif()
endmacro()
# Usage:
# zephyr_linker_dts_memory(NAME <name> PATH <path> FLAGS <flags>)
# zephyr_linker_dts_memory(NAME <name> NODELABEL <nodelabel> FLAGS <flags>)
# zephyr_linker_dts_memory(NAME <name> CHOSEN <prop> FLAGS <flags>)
#
# Zephyr linker devicetree memory.
# This function specifies a memory region for the platform in use based on its
# devicetree configuration.
#
# The memory will only be defined if the devicetree node or a devicetree node
# matching the nodelabel exists and has status okay.
#
# Only one of PATH, NODELABEL, and CHOSEN parameters may be given.
#
# NAME <name> : Name of the memory region, for example FLASH.
# PATH <path> : Devicetree node identifier.
# NODELABEL <label>: Node label
# CHOSEN <prop> : Chosen property, add memory section described by the
# /chosen property if it exists.
# FLAGS <flags> : Flags describing properties of the memory region.
# Currently supported:
# r: Read-only region
# w: Read-write region
# x: Executable region
# The flags r and x, or w and x may be combined like: rx, wx.
#
function(zephyr_linker_dts_memory)
set(single_args "CHOSEN;FLAGS;NAME;PATH;NODELABEL")
cmake_parse_arguments(DTS_MEMORY "" "${single_args}" "" ${ARGN})
if(DTS_MEMORY_UNPARSED_ARGUMENTS)
message(FATAL_ERROR "zephyr_linker_dts_memory(${ARGV0} ...) given unknown "
"arguments: ${DTS_MEMORY_UNPARSED_ARGUMENTS}"
)
endif()
if((DEFINED DTS_MEMORY_PATH AND (DEFINED DTS_MEMORY_NODELABEL OR DEFINED DTS_MEMORY_CHOSEN))
OR (DEFINED DTS_MEMORY_NODELABEL AND DEFINED DTS_MEMORY_CHOSEN))
message(FATAL_ERROR "zephyr_linker_dts_memory(${ARGV0} ...), only one of "
"PATH, NODELABEL, and CHOSEN is allowed."
)
endif()
if(DEFINED DTS_MEMORY_NODELABEL)
dt_nodelabel(DTS_MEMORY_PATH NODELABEL ${DTS_MEMORY_NODELABEL})
endif()
if(DEFINED DTS_MEMORY_CHOSEN)
dt_chosen(DTS_MEMORY_PATH PROPERTY ${DTS_MEMORY_CHOSEN})
endif()
if(NOT DEFINED DTS_MEMORY_PATH)
return()
endif()
dt_node_exists(exists PATH ${DTS_MEMORY_PATH})
if(NOT ${exists})
return()
endif()
dt_reg_addr(addr PATH ${DTS_MEMORY_PATH})
dt_reg_size(size PATH ${DTS_MEMORY_PATH})
zephyr_linker_memory(
NAME ${DTS_MEMORY_NAME}
START ${addr}
SIZE ${size}
FLAGS ${DTS_MEMORY_FLAGS}
)
endfunction()
# Usage:
# zephyr_linker_group(NAME <name> [VMA <region|group>] [LMA <region|group>])
# zephyr_linker_group(NAME <name> GROUP <group>)
#
# Zephyr linker group.
# This function specifies a group inside a memory region or another group.
#
# The group ensures that all section inside the group are located together inside
# the specified group.
#
# This also allows for section placement inside a given group without the section
# itself needing the precise knowledge regarding the exact memory region this
# section will be placed in, as that will be determined by the group setup.
#
# Each group will define the following linker symbols:
# __<name>_start : Start address of the group
# __<name>_end : End address of the group
# __<name>_size : Size of the group
#
# Note: <name> will be converted to lower casing for linker symbols definitions.
#
# NAME <name> : Name of the group.
# VMA <region|group> : VMA Memory region or group to be used for this group.
# If a group is used then the VMA region of that group will be used.
# LMA <region|group> : Memory region or group to be used for this group.
# GROUP <group> : Place the new group inside the existing group <group>
#
# Note: VMA and LMA are mutual exclusive with GROUP
#
# Example:
# zephyr_linker_memory(NAME memA START ... SIZE ... FLAGS ...)
# zephyr_linker_group(NAME groupA LMA memA)
# zephyr_linker_group(NAME groupB LMA groupA)
#
# will create two groups in same memory region as groupB will inherit the LMA
# from groupA:
#
# +-----------------+
# | memory region A |
# | |
# | +-------------+ |
# | | groupA | |
# | +-------------+ |
# | |
# | +-------------+ |
# | | groupB | |
# | +-------------+ |
# | |
# +-----------------+
#
# whereas
# zephyr_linker_memory(NAME memA START ... SIZE ... FLAGS ...)
# zephyr_linker_group(NAME groupA LMA memA)
# zephyr_linker_group(NAME groupB GROUP groupA)
#
# will create groupB inside groupA:
#
# +---------------------+
# | memory region A |
# | |
# | +-----------------+ |
# | | groupA | |
# | | | |
# | | +-------------+ | |
# | | | groupB | | |
# | | +-------------+ | |
# | | | |
# | +-----------------+ |
# | |
# +---------------------+
function(zephyr_linker_group)
set(single_args "NAME;GROUP;LMA;VMA")
cmake_parse_arguments(GROUP "" "${single_args}" "" ${ARGN})
if(GROUP_UNPARSED_ARGUMENTS)
message(FATAL_ERROR "zephyr_linker_group(${ARGV0} ...) given unknown "
"arguments: ${GROUP_UNPARSED_ARGUMENTS}"
)
endif()
if(DEFINED GROUP_GROUP AND (DEFINED GROUP_VMA OR DEFINED GROUP_LMA))
message(FATAL_ERROR "zephyr_linker_group(GROUP ...) cannot be used with "
"VMA or LMA"
)
endif()
set(GROUP)
zephyr_linker_arg_val_list(GROUP "${single_args}")
string(REPLACE ";" "\;" GROUP "${GROUP}")
set_property(TARGET linker
APPEND PROPERTY GROUPS "{${GROUP}}"
)
endfunction()
# Usage:
# zephyr_linker_section(NAME <name> [GROUP <group>]
# [VMA <region|group>] [LMA <region|group>]
# [ADDRESS <address>] [ALIGN <alignment>]
# [SUBALIGN <alignment>] [FLAGS <flags>]
# [HIDDEN] [NOINPUT] [NOINIT]
# [PASS <no> [<no>...]
# )
#
# Zephyr linker output section.
# This function specifies an output section for the linker.
#
# When using zephyr_linker_section(NAME <name>) an output section with <name>
# will be configured. This section will default include input sections of the
# same name, unless NOINPUT is specified.
# This means the section named `foo` will default include the sections matching
# `foo` and `foo.*`
# Each output section will define the following linker symbols:
# __<name>_start : Start address of the section
# __<name>_end : End address of the section
# __<name>_size : Size of the section
# __<name>_load_start : Load address of the section, if VMA = LMA then this
# value will be identical to `__<name>_start`
#
# The location of the output section can be controlled using LMA, VMA, and
# address parameters
#
# NAME <name> : Name of the output section.
# VMA <region|group> : VMA Memory region or group where code / data is located runtime (VMA)
# If <group> is used here it means the section will use the
# same VMA memory region as <group> but will not be placed
# inside the group itself, see also GROUP argument.
# KVMA <region|group> : Kernel VMA Memory region or group where code / data is located runtime (VMA)
# When MMU is active and Kernel VM base and offset is different
# from SRAM base and offset, then the region defined by KVMA will
# be used as VMA.
# If <group> is used here it means the section will use the
# same VMA memory region as <group> but will not be placed
# inside the group itself, see also GROUP argument.
# LMA <region|group> : Memory region or group where code / data is loaded (LMA)
# If VMA is different from LMA, the code / data will be loaded
# from LMA into VMA at bootup, this is usually the case for
# global or static variables that are loaded in rom and copied
# to ram at boot time.
# If <group> is used here it means the section will use the
# same LMA memory region as <group> but will not be placed
# inside the group itself, see also GROUP argument.
# GROUP <group> : Place this section inside the group <group>
# ADDRESS <address> : Specific address to use for this section.
# ALIGN_WITH_INPUT : The alignment difference between VMA and LMA is kept
# intact for this section.
# ALIGN <alignment> : Align the execution address with alignment.
# SUBALIGN <alignment>: Align input sections with alignment value.
# ENDALIGN <alignment>: Align the end so that next output section will start aligned.
# This only has effect on Scatter scripts.
# Note: Regarding all alignment attributes. Not all linkers may handle alignment
# in identical way. For example the Scatter file will align both load and
# execution address (LMA and VMA) to be aligned when given the ALIGN attribute.
# NOINPUT : No default input sections will be defined, to setup input
# sections for section <name>, the corresponding
# `zephyr_linker_section_configure()` must be used.
# PASS <no> [<no> ..] : Linker pass iteration where this section should be active.
# Default a section will be present during all linker passes
# But in cases a section shall only be present at a specific
# pass, this argument can be used. For example to only have
# this section present on the first linker pass, use `PASS 1`.
#
# Note: VMA and LMA are mutual exclusive with GROUP
#
function(zephyr_linker_section)
set(options "ALIGN_WITH_INPUT;HIDDEN;NOINIT;NOINPUT")
set(single_args "ADDRESS;ALIGN;ENDALIGN;GROUP;KVMA;LMA;NAME;SUBALIGN;TYPE;VMA")
set(multi_args "PASS")
cmake_parse_arguments(SECTION "${options}" "${single_args}" "${multi_args}" ${ARGN})
if(SECTION_UNPARSED_ARGUMENTS)
message(WARNING "zephyr_linker_section(${ARGV0} ...) given unknown "
"arguments: ${SECTION_UNPARSED_ARGUMENTS}"
)
endif()
if(DEFINED SECTION_GROUP AND (DEFINED SECTION_VMA OR DEFINED SECTION_LMA))
message(FATAL_ERROR "zephyr_linker_section(GROUP ...) cannot be used with "
"VMA or LMA"
)
endif()
if(DEFINED SECTION_KVMA)
# If KVMA is set and the Kernel virtual memory settings reqs are met, we
# substitute the VMA setting with the specified KVMA value.
if(CONFIG_MMU)
math(EXPR KERNEL_MEM_VM_OFFSET
"(${CONFIG_KERNEL_VM_BASE} + ${CONFIG_KERNEL_VM_OFFSET})\
- (${CONFIG_SRAM_BASE_ADDRESS} + ${CONFIG_SRAM_OFFSET})"
)
if(NOT (${KERNEL_MEM_VM_OFFSET} EQUAL 0))
set(SECTION_VMA ${SECTION_KVMA})
set(SECTION_KVMA)
endif()
endif()
endif()
set(SECTION)
zephyr_linker_arg_val_list(SECTION "${single_args}")
zephyr_linker_arg_val_list(SECTION "${options}")
zephyr_linker_arg_val_list(SECTION "${multi_args}")
string(REPLACE ";" "\;" SECTION "${SECTION}")
set_property(TARGET linker
APPEND PROPERTY SECTIONS "{${SECTION}}"
)
endfunction()
# Usage:
# zephyr_linker_section_ifdef(<setting>
# NAME <name> [VMA <region>] [LMA <region>]
# [ADDRESS <address>] [ALIGN <alignment>]
# [SUBALIGN <alignment>] [FLAGS <flags>]
# [HIDDEN] [NOINPUT] [NOINIT]
# [PASS <no> [<no>...]
# )
#
# Will create an output section if <setting> is enabled.
#
# <setting>: Setting to check for True value before invoking
# zephyr_linker_section()
#
# See zephyr_linker_section() description for other supported arguments.
#
macro(zephyr_linker_section_ifdef feature_toggle)
if(${${feature_toggle}})
zephyr_linker_section(${ARGN})
endif()
endmacro()
# Usage:
# zephyr_iterable_section(NAME <name> [GROUP <group>]
# [VMA <region|group>] [LMA <region|group>]
# [ALIGN_WITH_INPUT] [SUBALIGN <alignment>]
# )
#
#
# Define an output section which will set up an iterable area
# of equally-sized data structures. For use with Z_STRUCT_SECTION_ITERABLE.
# Input sections will be sorted by name in lexicographical order.
#
# Each list for an input section will define the following linker symbols:
# _<name>_list_start: Start of the iterable list
# _<name>_list_end : End of the iterable list
#
# The output section will be named `<name>_area` and define the following linker
# symbols:
# __<name>_area_start : Start address of the section
# __<name>_area_end : End address of the section
# __<name>_area_size : Size of the section
# __<name>_area_load_start : Load address of the section, if VMA = LMA then this
# value will be identical to `__<name>_area_start`
#
# NAME <name> : Name of the struct type, the output section be named
# accordingly as: <name>_area.
# VMA <region|group> : VMA Memory region where code / data is located runtime (VMA)
# LMA <region|group> : Memory region where code / data is loaded (LMA)
# If VMA is different from LMA, the code / data will be loaded
# from LMA into VMA at bootup, this is usually the case for
# global or static variables that are loaded in rom and copied
# to ram at boot time.
# GROUP <group> : Place this section inside the group <group>
# ADDRESS <address> : Specific address to use for this section.
# ALIGN_WITH_INPUT : The alignment difference between VMA and LMA is kept
# intact for this section.
# SUBALIGN <alignment>: Force input alignment with size <alignment>
# Note: Regarding all alignment attributes. Not all linkers may handle alignment
# in identical way. For example the Scatter file will align both load and
# execution address (LMA and VMA) to be aligned when given the ALIGN attribute.
#/
function(zephyr_iterable_section)
# ToDo - Should we use ROM, RAM, etc as arguments ?
set(options "ALIGN_WITH_INPUT")
set(single_args "GROUP;LMA;NAME;SUBALIGN;VMA")
set(multi_args "")
set(align_input)
cmake_parse_arguments(SECTION "${options}" "${single_args}" "${multi_args}" ${ARGN})
if(NOT DEFINED SECTION_NAME)
message(FATAL_ERROR "zephyr_iterable_section(${ARGV0} ...) missing "
"required argument: NAME"
)
endif()
if(NOT DEFINED SECTION_SUBALIGN)
message(FATAL_ERROR "zephyr_iterable_section(${ARGV0} ...) missing "
"required argument: SUBALIGN"
)
endif()
if(SECTION_ALIGN_WITH_INPUT)
set(align_input ALIGN_WITH_INPUT)
endif()
zephyr_linker_section(
NAME ${SECTION_NAME}_area
GROUP "${SECTION_GROUP}"
VMA "${SECTION_VMA}" LMA "${SECTION_LMA}"
NOINPUT ${align_input} SUBALIGN ${SECTION_SUBALIGN}
)
zephyr_linker_section_configure(
SECTION ${SECTION_NAME}_area
INPUT "._${SECTION_NAME}.static.*"
SYMBOLS _${SECTION_NAME}_list_start _${SECTION_NAME}_list_end
KEEP SORT NAME
)
endfunction()
# Usage:
# zephyr_linker_section_obj_level(SECTION <section> LEVEL <level>)
#
# generate a symbol to mark the start of the objects array for
# the specified object and level, then link all of those objects
# (sorted by priority). Ensure the objects aren't discarded if there is
# no direct reference to them.
#
# This is useful content such as struct devices.
#
# For example: zephyr_linker_section_obj_level(SECTION init LEVEL PRE_KERNEL_1)
# will create an input section matching `.z_init_PRE_KERNEL_1?_` and
# `.z_init_PRE_KERNEL_1??_`.
#
# SECTION <section>: Section in which the objects shall be placed
# LEVEL <level> : Priority level, all input sections matching the level
# will be sorted.
#
function(zephyr_linker_section_obj_level)
set(single_args "SECTION;LEVEL")
cmake_parse_arguments(OBJ "" "${single_args}" "" ${ARGN})
if(NOT DEFINED OBJ_SECTION)
message(FATAL_ERROR "zephyr_linker_section_obj_level(${ARGV0} ...) "
"missing required argument: SECTION"
)
endif()
if(NOT DEFINED OBJ_LEVEL)
message(FATAL_ERROR "zephyr_linker_section_obj_level(${ARGV0} ...) "
"missing required argument: LEVEL"
)
endif()
zephyr_linker_section_configure(
SECTION ${OBJ_SECTION}
INPUT ".z_${OBJ_SECTION}_${OBJ_LEVEL}?_"
SYMBOLS __${OBJ_SECTION}_${OBJ_LEVEL}_start
KEEP SORT NAME
)
zephyr_linker_section_configure(
SECTION ${OBJ_SECTION}
INPUT ".z_${OBJ_SECTION}_${OBJ_LEVEL}??_"
KEEP SORT NAME
)
endfunction()
# Usage:
# zephyr_linker_section_configure(SECTION <section> [ALIGN <alignment>]
# [PASS <no>] [PRIO <no>] [SORT <sort>]
# [ANY] [FIRST] [KEEP]
# )
#
# Configure an output section with additional input sections.
# An output section can be configured with additional input sections besides its
# default section.
# For example, adding the input section `foo` to the output section bar, with KEEP
# attribute, then call:
# zephyr_linker_section_configure(SECTION bar INPUT foo KEEP)
#
# ALIGN <alignment> : Will align the input section placement inside the load
# region with <alignment>
# FIRST : The first input section in the list should be marked as
# first section in output.
# SORT <NAME> : Sort the input sections according to <type>.
# Currently only `NAME` is supported.
# KEEP : Do no eliminate input section during linking
# PRIO : The priority of the input section. Per default, input
# sections order is not guaranteed by all linkers, but
# using priority, then Zephyr CMake linker will create
# sections so order can be guaranteed. All unprioritized
# sections will internally be given a CMake process order
# priority counting from 100, so first unprioritized section
# is handles internal pri0 100, next 101, and so on.
# To ensure a specific input section come before those,
# you may use `PRIO 50`, `PRIO 20` and so on.
# To ensure an input section is at the end, it is advised
# to use `PRIO 200` and above.
# PASS <no> : The call should only be considered for linker pass number <no>.
# For example, `PASS 1` means the call is only effective
# on first linker pass iteration. `PASS 2` on second iteration,
# and so on.
# FLAGS <flags> : Special section flags such as "+RO", +XO, "+ZI".
# ANY : ANY section flag in scatter file.
# The FLAGS and ANY arguments only has effect for scatter files.
#
function(zephyr_linker_section_configure)
set(options "ANY;FIRST;KEEP")
set(single_args "ALIGN;OFFSET;PASS;PRIO;SECTION;SORT")
set(multi_args "FLAGS;INPUT;SYMBOLS")
cmake_parse_arguments(SECTION "${options}" "${single_args}" "${multi_args}" ${ARGN})
if(SECTION_UNPARSED_ARGUMENTS)
message(FATAL_ERROR "zephyr_linker_section_configure(${ARGV0} ...) given unknown arguments: ${SECTION_UNPARSED_ARGUMENTS}")
endif()
if(DEFINED SECTION_SYMBOLS)
list(LENGTH SECTION_SYMBOLS symbols_count)
if(${symbols_count} GREATER 2)
message(FATAL_ERROR "zephyr_linker_section_configure(SYMBOLS [start_sym [end_sym]]) takes maximum two symbol names (start and end).")
endif()
endif()
set(SECTION)
zephyr_linker_arg_val_list(SECTION "${single_args}")
zephyr_linker_arg_val_list(SECTION "${options}")
zephyr_linker_arg_val_list(SECTION "${multi_args}")
string(REPLACE ";" "\;" SECTION "${SECTION}")
set_property(TARGET linker
APPEND PROPERTY SECTION_SETTINGS "{${SECTION}}"
)
endfunction()
# Usage:
# zephyr_linker_symbol(SYMBOL <name> EXPR <expr>)
#
# Add additional user defined symbol to the generated linker script.
#
# SYMBOL <name>: Symbol name to be available.
# EXPR <expr> : Expression that defines the symbol. Due to linker limitations
# all expressions should only contain simple math, such as
# `+, -, *` and similar. The expression will go directly into the
# linker, and all `%<symbol>%` will be replaced with the referred
# symbol.
#
# Example:
# To create a new symbol `bar` pointing to the start VMA address of section
# `foo` + 1024, one can write:
# zephyr_linker_symbol(SYMBOL bar EXPR "(%foo% + 1024)")
#
function(zephyr_linker_symbol)
set(single_args "EXPR;SYMBOL")
cmake_parse_arguments(SYMBOL "" "${single_args}" "" ${ARGN})
if(SECTION_UNPARSED_ARGUMENTS)
message(WARNING "zephyr_linker_symbol(${ARGV0} ...) given unknown "
"arguments: ${SECTION_UNPARSED_ARGUMENTS}"
)
endif()
set(SYMBOL)
zephyr_linker_arg_val_list(SYMBOL "${single_args}")
string(REPLACE ";" "\;" SYMBOL "${SYMBOL}")
set_property(TARGET linker
APPEND PROPERTY SYMBOLS "{${SYMBOL}}"
)
endfunction()
# Internal helper macro for zephyr_linker*() functions.
# The macro will create a list of argument-value pairs for defined arguments
# that can be passed on to linker script generators and processed as a CMake
# function call using cmake_parse_arguments.
#
# For example, having the following argument and value:
# FOO: bar
# BAZ: <undefined>
# QUX: option set
#
# will create a list as: "FOO;bar;QUX:TRUE" which can then be parsed as argument
# list later.
macro(zephyr_linker_arg_val_list list arguments)
foreach(arg ${arguments})
if(DEFINED ${list}_${arg})
list(APPEND ${list} ${arg} "${${list}_${arg}}")
endif()
endforeach()
endmacro()