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zephyr/CMakeLists.txt

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CMake
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project(Zephyr-Kernel VERSION ${PROJECT_VERSION})
enable_language(C CXX ASM)
# *DOCUMENTATION*
#
# Note that this is *NOT* the top-level CMakeLists.txt. That's in the
# application. See the Application Development Primer documentation
# for details.
#
# To see a list of typical targets execute "make usage"
# More info can be located in ./README.rst
# Comments in this file are targeted only to the developer, do not
# expect to learn how to build the kernel reading this file.
# Verify that the toolchain can compile a dummy file, if it is not we
# won't be able to test for compatiblity with certain C flags.
check_c_compiler_flag("" toolchain_is_ok)
assert(toolchain_is_ok "The toolchain is unable to build a dummy C file. See CMakeError.log.")
# Do not generate make install target.
set(CMAKE_SKIP_INSTALL_RULES ON)
set(CMAKE_EXECUTABLE_SUFFIX .elf)
set(SOC_NAME ${CONFIG_SOC})
set(SOC_SERIES ${CONFIG_SOC_SERIES})
set(SOC_FAMILY ${CONFIG_SOC_FAMILY})
if("${SOC_SERIES}" STREQUAL "")
set(SOC_PATH ${SOC_NAME})
else()
set(SOC_PATH ${SOC_FAMILY}/${SOC_SERIES})
endif()
if(NOT PROPERTY_LINKER_SCRIPT_DEFINES)
set_property(GLOBAL PROPERTY PROPERTY_LINKER_SCRIPT_DEFINES -D__GCC_LINKER_CMD__)
endif()
define_property(GLOBAL PROPERTY PROPERTY_OUTPUT_FORMAT BRIEF_DOCS " " FULL_DOCS " ")
set_property( GLOBAL PROPERTY PROPERTY_OUTPUT_FORMAT elf32-little${ARCH})
# zephyr_interface is a source-less library that has all the global
# compiler options needed by all source files. All zephyr libraries,
# including the library named "zephyr" link with this library to
# obtain these flags.
add_library(zephyr_interface INTERFACE)
# zephyr is a catchall CMake library for source files that can be
# built purely with the include paths, defines, and other compiler
# flags that come with zephyr_interface.
zephyr_library_named(zephyr)
zephyr_include_directories(
kernel/include
arch/${ARCH}/include
arch/${ARCH}/soc/${SOC_PATH}
arch/${ARCH}/soc/${SOC_PATH}/include
arch/${ARCH}/soc/${SOC_FAMILY}/include
${BOARD_DIR}
include
include/drivers
${PROJECT_BINARY_DIR}/include/generated
${USERINCLUDE}
${STDINCLUDE}
)
zephyr_compile_definitions(
KERNEL
__ZEPHYR__=1
)
if(NOT CONFIG_COVERAGE)
zephyr_compile_definitions(
_FORTIFY_SOURCE=2
)
endif()
# We need to set an optimization level.
# Default to -Os
# unless CONFIG_DEBUG is set, then it is -Og
#
# also, some toolchain's break with -Os, and some toolchain's break
# with -Og so allow them to override what flag to use
#
# Finally, the user can use Kconfig to add compiler options that will
# come after these options and override them
set_ifndef(OPTIMIZE_FOR_SIZE_FLAG "-Os")
set_ifndef(OPTIMIZE_FOR_DEBUG_FLAG "-Og")
set_ifndef(OPTIMIZE_FOR_COVERAGE_FLAG "-O0")
if(CONFIG_DEBUG)
set(OPTIMIZATION_FLAG ${OPTIMIZE_FOR_DEBUG_FLAG})
elseif(CONFIG_COVERAGE)
set(OPTIMIZATION_FLAG ${OPTIMIZE_FOR_COVERAGE_FLAG})
else()
set(OPTIMIZATION_FLAG ${OPTIMIZE_FOR_SIZE_FLAG}) # Default
endif()
zephyr_compile_options(
${OPTIMIZATION_FLAG} # Usually -Os
-g # TODO: build configuration enough?
-Wall
-Wformat
-Wformat-security
-Wno-format-zero-length
-imacros ${AUTOCONF_H}
-ffreestanding
-Wno-main
${NOSTDINC_F}
)
zephyr_compile_options(
$<$<COMPILE_LANGUAGE:C>:-std=c99>
$<$<COMPILE_LANGUAGE:CXX>:-std=c++11>
$<$<COMPILE_LANGUAGE:CXX>:-fcheck-new>
$<$<COMPILE_LANGUAGE:CXX>:-ffunction-sections>
$<$<COMPILE_LANGUAGE:CXX>:-fdata-sections>
$<$<COMPILE_LANGUAGE:CXX>:-fno-rtti>
$<$<COMPILE_LANGUAGE:CXX>:-fno-exceptions>
$<$<COMPILE_LANGUAGE:ASM>:-xassembler-with-cpp>
$<$<COMPILE_LANGUAGE:ASM>:-D_ASMLANGUAGE>
)
if(NOT CONFIG_NATIVE_APPLICATION)
zephyr_ld_options(
-nostartfiles
-nodefaultlibs
-nostdlib
-static
-no-pie
)
endif()
# ==========================================================================
#
# cmake -DW=... settings
#
# W=1 - warnings that may be relevant and does not occur too often
# W=2 - warnings that occur quite often but may still be relevant
# W=3 - the more obscure warnings, can most likely be ignored
# ==========================================================================
if(W MATCHES "1")
zephyr_compile_options(
-Wextra
-Wunused
-Wno-unused-parameter
-Wmissing-declarations
-Wmissing-format-attribute
-Wold-style-definition
)
zephyr_cc_option(
-Wmissing-prototypes
-Wmissing-include-dirs
-Wunused-but-set-variable
-Wno-missing-field-initializers
)
endif()
if(W MATCHES "2")
zephyr_compile_options(
-Waggregate-return
-Wcast-align
-Wdisabled-optimization
-Wnested-externs
-Wshadow
)
zephyr_cc_option(
-Wlogical-op
-Wmissing-field-initializers
)
endif()
if(W MATCHES "3")
zephyr_compile_options(
-Wbad-function-cast
-Wcast-qual
-Wconversion
-Wpacked
-Wpadded
-Wpointer-arith
-Wredundant-decls
-Wswitch-default
)
zephyr_cc_option(
-Wpacked-bitfield-compat
-Wvla
)
endif()
# Allow the user to inject options when calling cmake, e.g.
# 'cmake -DEXTRA_CFLAGS="-Werror -Wno-deprecated-declarations" ..'
include(cmake/extra_flags.cmake)
if(CONFIG_READABLE_ASM)
zephyr_cc_option(-fno-reorder-blocks)
zephyr_cc_option(-fno-ipa-cp-clone)
zephyr_cc_option(-fno-partial-inlining)
endif()
zephyr_cc_option(-fno-asynchronous-unwind-tables)
zephyr_cc_option(-fno-pie)
zephyr_cc_option(-fno-pic)
zephyr_cc_option(-fno-strict-overflow)
zephyr_cc_option(-Wno-pointer-sign)
zephyr_compile_options_ifdef(CONFIG_STACK_CANARIES -fstack-protector-all)
if(CONFIG_OVERRIDE_FRAME_POINTER_DEFAULT)
if(CONFIG_OMIT_FRAME_POINTER)
zephyr_cc_option(-fomit-frame-pointer)
else()
zephyr_cc_option(-fno-omit-frame-pointer)
endif()
endif()
zephyr_compile_options(${CONFIG_COMPILER_OPT})
# TODO: Include arch compiler options at this point.
# TODO: This Clang check is broken
if(CMAKE_C_COMPILER_ID STREQUAL "Clang")
zephyr_cc_option(
-Wno-unknown-warning-option
-Wno-unused-variable
-Wno-format-invalid-specifier
-Wno-gnu
# comparison of unsigned expression < 0 is always false
-Wno-tautological-compare
)
else() # GCC assumed
zephyr_cc_option(
-Wno-unused-but-set-variable
-fno-reorder-functions
)
if(NOT ${ZEPHYR_GCC_VARIANT} STREQUAL "xcc")
zephyr_cc_option(-fno-defer-pop)
endif()
endif()
zephyr_cc_option_ifdef(CONFIG_DEBUG_SECTION_MISMATCH -fno-inline-functions-called-once)
zephyr_cc_option_ifdef(CONFIG_STACK_USAGE -fstack-usage)
zephyr_system_include_directories(${NOSTDINC})
# Force an error when things like SYS_INIT(foo, ...) occur with a missing header.
zephyr_cc_option(-Werror=implicit-int)
# Prohibit date/time macros, which would make the build non-deterministic
# cc-option(-Werror=date-time)
# TODO: Archiver arguments
# ar_option(D)
set_ifndef(LINKERFLAGPREFIX -Wl)
if(NOT CONFIG_NATIVE_APPLICATION)
zephyr_ld_options(
${LINKERFLAGPREFIX},-X
${LINKERFLAGPREFIX},-N
)
endif()
zephyr_ld_options(
${LINKERFLAGPREFIX},--gc-sections
${LINKERFLAGPREFIX},--build-id=none
)
if(CONFIG_HAVE_CUSTOM_LINKER_SCRIPT)
set(LINKER_SCRIPT ${APPLICATION_SOURCE_DIR}/${CONFIG_CUSTOM_LINKER_SCRIPT})
if(NOT EXISTS LINKER_SCRIPT)
set(LINKER_SCRIPT ${CONFIG_CUSTOM_LINKER_SCRIPT})
if(NOT EXISTS LINKER_SCRIPT)
message(FATAL_ERROR "CONFIG_HAVE_CUSTOM_LINKER_SCRIPT was set, but no linker script was found at '${CONFIG_CUSTOM_LINKER_SCRIPT}'")
endif()
endif()
else()
# Try a board specific linker file
set(LINKER_SCRIPT ${BOARD_DIR}/linker.ld)
if(NOT EXISTS ${LINKER_SCRIPT})
# If not available, try an SoC specific linker file
set(LINKER_SCRIPT $ENV{ZEPHYR_BASE}/arch/${ARCH}/soc/${SOC_PATH}/linker.ld)
endif()
endif()
if(NOT EXISTS ${LINKER_SCRIPT})
message(FATAL_ERROR "Could not find linker script: '${LINKER_SCRIPT}'. Corrupted configuration?")
endif()
configure_file(version.h.in ${PROJECT_BINARY_DIR}/include/generated/version.h)
add_subdirectory(lib)
add_subdirectory(misc)
# We use include instead of add_subdirectory to avoid creating a new directory scope.
# This is because source file properties are directory scoped, including the GENERATED
# property which is set implicitly for custom command outputs
include(misc/generated/CMakeLists.txt)
add_subdirectory(boards)
add_subdirectory(ext)
add_subdirectory(subsys)
add_subdirectory(arch)
add_subdirectory(drivers)
add_subdirectory(tests)
set(syscall_macros_h ${ZEPHYR_BINARY_DIR}/include/generated/syscall_macros.h)
add_custom_target(syscall_macros_h_target DEPENDS ${syscall_macros_h})
add_custom_command( OUTPUT ${syscall_macros_h}
COMMAND
${PYTHON_EXECUTABLE}
${PROJECT_SOURCE_DIR}/scripts/gen_syscall_header.py
> ${syscall_macros_h}
DEPENDS ${PROJECT_SOURCE_DIR}/scripts/gen_syscall_header.py
)
# This command is a hack to support commands that are always run. Any
# target that depends on always_rebuild will always be rebuilt.
add_custom_command(OUTPUT always_rebuild COMMAND cmake -E echo Building for board ${BOARD})
set(syscall_list_h ${CMAKE_CURRENT_BINARY_DIR}/include/generated/syscall_list.h)
set(syscalls_json ${CMAKE_CURRENT_BINARY_DIR}/misc/generated/syscalls.json)
add_custom_command(
OUTPUT
${syscalls_json}
COMMAND
${PYTHON_EXECUTABLE}
${PROJECT_SOURCE_DIR}/scripts/parse_syscalls.py
--include ${PROJECT_SOURCE_DIR}/include # Read files from this dir
--json-file ${syscalls_json} # Write this file
DEPENDS always_rebuild
)
add_custom_target(syscall_list_h_target DEPENDS ${syscall_list_h})
add_custom_command(OUTPUT include/generated/syscall_dispatch.c ${syscall_list_h}
# Also, some files are written to include/generated/syscalls/
COMMAND
${PYTHON_EXECUTABLE}
${PROJECT_SOURCE_DIR}/scripts/gen_syscalls.py
--json-file ${syscalls_json} # Read this file
--base-output include/generated/syscalls # Write to this dir
--syscall-dispatch include/generated/syscall_dispatch.c # Write this file
> ${syscall_list_h} # Write stdout to this file
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
DEPENDS ${syscalls_json}
)
# Generate offsets.c.obj from offsets.c
# Generate offsets.h from offsets.c.obj
set(OFFSETS_C_PATH $ENV{ZEPHYR_BASE}/arch/${ARCH}/core/offsets/offsets.c)
set(OFFSETS_O_PATH ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/offsets.dir/arch/${ARCH}/core/offsets/offsets.c.obj)
set(OFFSETS_H_PATH ${PROJECT_BINARY_DIR}/include/generated/offsets.h)
add_library( offsets STATIC ${OFFSETS_C_PATH})
target_link_libraries(offsets zephyr_interface)
add_dependencies( offsets
syscall_list_h_target
syscall_macros_h_target
)
add_custom_command(
OUTPUT ${OFFSETS_H_PATH}
COMMAND ${PYTHON_EXECUTABLE} $ENV{ZEPHYR_BASE}/scripts/gen_offset_header.py
-i ${OFFSETS_O_PATH}
-o ${OFFSETS_H_PATH}
DEPENDS offsets
)
add_custom_target(offsets_h DEPENDS ${OFFSETS_H_PATH})
zephyr_include_directories(${TOOLCHAIN_INCLUDES})
zephyr_get_include_directories_for_lang(C ZEPHYR_INCLUDES)
add_subdirectory(kernel)
# Read list content
get_property(ZEPHYR_LIBS_PROPERTY GLOBAL PROPERTY ZEPHYR_LIBS)
foreach(zephyr_lib ${ZEPHYR_LIBS_PROPERTY})
# TODO: Could this become an INTERFACE property of zephyr_interface?
add_dependencies(${zephyr_lib} offsets_h)
# Verify that all libraries have source files. Libraries without
# source files are not supported because they are an indication that
# something has been misconfigured.
get_target_property(lib_sources ${zephyr_lib} SOURCES)
if(lib_sources STREQUAL lib_sources-NOTFOUND
AND (NOT (${zephyr_lib} STREQUAL app))
)
# app is not checked because it's sources are added to it after
# this CMakeLists.txt file has been processed
message(FATAL_ERROR "\
The Zephyr library '${zephyr_lib}' was created without source files. \
Empty libraries are not supported. \
Either make sure that the library has the sources it should have, \
or make sure it is not created when it has no source files.")
endif()
endforeach()
get_property(OUTPUT_FORMAT GLOBAL PROPERTY PROPERTY_OUTPUT_FORMAT)
get_property(LINKER_SCRIPT_DEFINES GLOBAL PROPERTY PROPERTY_LINKER_SCRIPT_DEFINES)
if(CONFIG_APPLICATION_MEMORY)
# Objects default to being in kernel space, and then we exclude
# certain items.
set(kernel_object_file_list
${ZEPHYR_LIBS_PROPERTY}
kernel
)
list(
REMOVE_ITEM
kernel_object_file_list
app
)
# The zephyr libraries in zephyr/lib/ and zephyr/test/ belong in
# userspace.
# NB: The business logic for determing what source files are in
# kernel space and what source files are in user space is
# fragile. Fix ASAP.
#
# The intended design is that certain directories are designated as
# containing userspace code and others for kernel space code. The
# implementation we have however is not working on directories of
# code, it is working on zephyr libraries. It is exploiting the fact
# that zephyr libraries follow a naming scheme as described in
# extensions.cmake:zephyr_library_get_current_dir_lib_name
#
# But code from test/ and lib/ that is placed in the "zephyr"
# library (with zephyr_sources()) will not be in a library that is
# prefixed with lib__ or test__ and will end up in the wrong address
# space.
set(application_space_dirs
lib
tests
)
foreach(f ${kernel_object_file_list})
foreach(app_dir ${application_space_dirs})
if(${f} MATCHES "^${app_dir}__") # Begins with ${app_dir}__, e.g. lib__libc
list(
REMOVE_ITEM
kernel_object_file_list
${f}
)
endif()
endforeach()
endforeach()
# Create a list ks, with relative paths to kernel space libs.
foreach(f ${kernel_object_file_list})
get_target_property(target_name ${f} NAME)
get_target_property(target_binary_dir ${f} BINARY_DIR)
string(REPLACE
${PROJECT_BINARY_DIR}
""
fixed_path
${target_binary_dir}
)
# Append / if not empty
if(fixed_path)
set(fixed_path "${fixed_path}/")
endif()
# Cut off leading / if present
if(fixed_path MATCHES "^/.+")
string(SUBSTRING ${fixed_path} 1 -1 fixed_path)
endif()
set(fixed_path "${fixed_path}lib${target_name}.a")
if(CMAKE_GENERATOR STREQUAL "Ninja")
# Ninja invokes the linker from the root of the build directory
# (APPLICATION_BINARY_DIR) instead of from the build/zephyr
# directory (PROJECT_BINARY_DIR). So for linker-defs.h to get
# the correct path we need to prefix with zephyr/.
set(fixed_path "zephyr/${fixed_path}")
endif()
list(APPEND ks ${fixed_path})
endforeach()
# We are done constructing kernel_object_file_list, now we inject this
# information into the linker script through -D's
list(LENGTH kernel_object_file_list NUM_KERNEL_OBJECT_FILES)
list(APPEND LINKER_SCRIPT_DEFINES -DNUM_KERNEL_OBJECT_FILES=${NUM_KERNEL_OBJECT_FILES})
set(i 0)
foreach(f ${ks})
list(APPEND LINKER_SCRIPT_DEFINES -DKERNEL_OBJECT_FILE_${i}=${f})
math(EXPR i "${i}+1")
endforeach()
endif() # CONFIG_APPLICATION_MEMORY
function(construct_add_custom_command_for_linker_pass linker_pass_number output_variable)
if(linker_pass_number EQUAL 1)
set(is_first_pass 1)
elseif(linker_pass_number GREATER 1)
set(is_first_pass 0)
else()
assert(0 "Unreachable code")
endif()
if(is_first_pass)
set(linker_cmd_file_name linker.cmd)
else()
set(linker_cmd_file_name linker_pass${linker_pass_number}.cmd)
endif()
if(is_first_pass)
set(LINKER_PASS_DEFINE "")
else()
set(LINKER_PASS_DEFINE -DLINKER_PASS${linker_pass_number})
endif()
# Different generators deal with depfiles differently.
if(CMAKE_GENERATOR STREQUAL "Unix Makefiles")
# Note that the IMPLICIT_DEPENDS option is currently supported only
# for Makefile generators and will be ignored by other generators.
set(LINKER_SCRIPT_DEP IMPLICIT_DEPENDS C ${LINKER_SCRIPT})
elseif(CMAKE_GENERATOR STREQUAL "Ninja")
# Using DEPFILE with other generators than Ninja is an error.
set(LINKER_SCRIPT_DEP DEPFILE ${PROJECT_BINARY_DIR}/${linker_cmd_file_name}.dep)
else()
# TODO: How would the linker script dependencies work for non-linker
# script generators.
message(STATUS "Warning; this generator is not well supported. The
Linker script may not be regenerated when it should.")
set(LINKER_SCRIPT_DEP "")
endif()
set(${output_variable}
OUTPUT ${linker_cmd_file_name}
DEPENDS ${LINKER_SCRIPT}
${LINKER_SCRIPT_DEP}
COMMAND ${CMAKE_C_COMPILER}
-x assembler-with-cpp
${NOSTDINC_F}
-undef
-MD -MF ${linker_cmd_file_name}.dep -MT ${BASE_NAME}/${linker_cmd_file_name}
${ZEPHYR_INCLUDES}
${LINKER_SCRIPT_DEFINES}
${LINKER_PASS_DEFINE}
-E ${LINKER_SCRIPT}
-P # Prevent generation of debug `#line' directives.
-o ${linker_cmd_file_name}
VERBATIM
WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
PARENT_SCOPE
)
endfunction()
get_filename_component(BASE_NAME ${CMAKE_CURRENT_BINARY_DIR} NAME)
construct_add_custom_command_for_linker_pass(1 custom_command)
add_custom_command(
${custom_command}
)
add_custom_target(
linker_script
DEPENDS
linker.cmd
offsets_h
)
# Give the 'linker_script' target all of the include directories so
# that cmake can successfully find the linker_script's header
# dependencies.
zephyr_get_include_directories_for_lang(C
ZEPHYR_INCLUDE_DIRS
STRIP_PREFIX # Don't use a -I prefix
)
set_property(TARGET
linker_script
PROPERTY INCLUDE_DIRECTORIES
${ZEPHYR_INCLUDE_DIRS}
)
get_property(E_KERNEL_ENTRY GLOBAL PROPERTY E_KERNEL_ENTRY)
set(zephyr_lnk
${LINKERFLAGPREFIX},-Map=${PROJECT_BINARY_DIR}/${KERNEL_MAP_NAME}
-u_OffsetAbsSyms
-u_ConfigAbsSyms
${E_KERNEL_ENTRY}
${LINKERFLAGPREFIX},--start-group
${LINKERFLAGPREFIX},--whole-archive
${ZEPHYR_LIBS_PROPERTY}
${LINKERFLAGPREFIX},--no-whole-archive
kernel
${OFFSETS_O_PATH}
${LINKERFLAGPREFIX},--end-group
${LIB_INCLUDE_DIR}
-L${PROJECT_BINARY_DIR}
${TOOLCHAIN_LIBS}
)
if(CONFIG_GEN_ISR_TABLES)
# isr_tables.c is generated from zephyr_prebuilt by
# gen_isr_tables.py
add_custom_command(
OUTPUT isr_tables.c
COMMAND ${CMAKE_OBJCOPY}
-I ${OUTPUT_FORMAT}
-O binary
--only-section=.intList
$<TARGET_FILE:zephyr_prebuilt>
isrList.bin
COMMAND ${PYTHON_EXECUTABLE}
$ENV{ZEPHYR_BASE}/arch/common/gen_isr_tables.py
--output-source isr_tables.c
--intlist isrList.bin
$<$<BOOL:${CMAKE_VERBOSE_MAKEFILE}>:--debug>
--sw-isr-table
--vector-table
DEPENDS zephyr_prebuilt
)
set_property(GLOBAL APPEND PROPERTY GENERATED_KERNEL_SOURCE_FILES isr_tables.c)
endif()
if(CONFIG_USERSPACE)
set(GEN_KOBJ_LIST $ENV{ZEPHYR_BASE}/scripts/gen_kobject_list.py)
set(PROCESS_GPERF $ENV{ZEPHYR_BASE}/scripts/process_gperf.py)
set(OBJ_LIST kobject_hash.gperf)
set(OUTPUT_SRC_PRE kobject_hash_preprocessed.c)
set(OUTPUT_SRC kobject_hash.c)
set(OUTPUT_OBJ kobject_hash.c.obj)
set(OUTPUT_OBJ_RENAMED kobject_hash_renamed.o)
# Essentially what we are doing here is extracting some information
# out of the nearly finished elf file, generating the source code
# for a hash table based on that information, and then compiling and
# linking the hash table back into a now even more nearly finished
# elf file.
# Use the script GEN_KOBJ_LIST to scan the kernel binary's
# (zephyr_prebuilt) DWARF information to produce a table of kernel
# objects (OBJ_LIST) which we will then pass to gperf
add_custom_command(
OUTPUT ${OBJ_LIST}
COMMAND
${PYTHON_EXECUTABLE}
${GEN_KOBJ_LIST}
--kernel $<TARGET_FILE:zephyr_prebuilt>
--output ${OBJ_LIST}
$<$<BOOL:${CMAKE_VERBOSE_MAKEFILE}>:--verbose>
DEPENDS zephyr_prebuilt
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
)
add_custom_target(obj_list DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${OBJ_LIST})
# Use gperf to generate C code (OUTPUT_SRC_PRE) which implements a
# perfect hashtable based on OBJ_LIST
add_custom_command(
OUTPUT ${OUTPUT_SRC_PRE}
COMMAND
${GPERF}
--output-file ${OUTPUT_SRC_PRE}
${OBJ_LIST}
DEPENDS obj_list
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
)
add_custom_target(output_src_pre DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT_SRC_PRE})
# For our purposes the code/data generated by gperf is not optimal.
#
# The script PROCESS_GPERF creates a new c file OUTPUT_SRC based on
# OUTPUT_SRC_PRE to greatly reduce the amount of code/data generated
# since we know we are always working with pointer values
add_custom_command(
OUTPUT ${OUTPUT_SRC}
COMMAND
${PROCESS_GPERF}
-i ${OUTPUT_SRC_PRE}
-o ${OUTPUT_SRC}
$<$<BOOL:${CMAKE_VERBOSE_MAKEFILE}>:--verbose>
DEPENDS output_src_pre
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
)
add_custom_target(output_src DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT_SRC})
# We need precise control of where generated text/data ends up in the final
# kernel image. Disable function/data sections and use objcopy to move
# generated data into special section names
add_library(output_lib STATIC
${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT_SRC}
)
target_link_libraries(output_lib zephyr_interface)
# Turn off -ffunction-sections, etc.
# NB: Using a library instead of target_compile_options(output_lib
# [...]) because a library's options have precedence
add_library(output_lib_interface INTERFACE)
target_compile_options(output_lib_interface INTERFACE
-fno-function-sections
-fno-data-sections
)
target_link_libraries(output_lib output_lib_interface)
set(OUTPUT_OBJ_PATH ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/output_lib.dir/${OUTPUT_OBJ})
add_custom_command(
OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT_OBJ_RENAMED}
COMMAND
${CMAKE_OBJCOPY}
--rename-section .data=.kobject_data.data
--rename-section .text=.kobject_data.text
--rename-section .rodata=.kobject_data.rodata
${OUTPUT_OBJ_PATH}
${OUTPUT_OBJ_RENAMED}
DEPENDS output_lib
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
)
add_custom_target(output_obj_renamed DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT_OBJ_RENAMED})
add_library(output_obj_renamed_lib STATIC IMPORTED GLOBAL)
set_property(
TARGET output_obj_renamed_lib
PROPERTY
IMPORTED_LOCATION ${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT_OBJ_RENAMED}
)
add_dependencies(
output_obj_renamed_lib
output_obj_renamed
)
set_property(GLOBAL APPEND PROPERTY GENERATED_KERNEL_OBJECT_FILES output_obj_renamed_lib)
endif()
# Read global variables into local variables
get_property(GKOF GLOBAL PROPERTY GENERATED_KERNEL_OBJECT_FILES)
get_property(GKSF GLOBAL PROPERTY GENERATED_KERNEL_SOURCE_FILES)
get_property(TOPT GLOBAL PROPERTY TOPT)
set_ifndef( TOPT -T)
# FIXME: Is there any way to get rid of empty_file.c?
add_executable( zephyr_prebuilt misc/empty_file.c)
target_link_libraries(zephyr_prebuilt ${TOPT} ${PROJECT_BINARY_DIR}/linker.cmd ${zephyr_lnk})
set_property(TARGET zephyr_prebuilt PROPERTY LINK_DEPENDS ${PROJECT_BINARY_DIR}/linker.cmd)
add_dependencies( zephyr_prebuilt linker_script offsets)
if(NOT CONFIG_NATIVE_APPLICATION)
set(NOSTDINC_F -nostdinc)
endif()
if(GKOF OR GKSF)
set(logical_target_for_zephyr_elf kernel_elf)
# The second linker pass uses the same source linker script of the
# first pass (LINKER_SCRIPT), but this time with a different output
# file and preprocessed with the define LINKER_PASS2.
construct_add_custom_command_for_linker_pass(2 custom_command)
add_custom_command(
${custom_command}
)
add_custom_target(
linker_pass2_script
DEPENDS
linker_pass2.cmd
offsets_h
)
set_property(TARGET
linker_pass2_script
PROPERTY INCLUDE_DIRECTORIES
${ZEPHYR_INCLUDE_DIRS}
)
add_executable( kernel_elf misc/empty_file.c ${GKSF})
target_link_libraries(kernel_elf ${GKOF} ${TOPT} ${PROJECT_BINARY_DIR}/linker_pass2.cmd ${zephyr_lnk})
set_property(TARGET kernel_elf PROPERTY LINK_DEPENDS ${PROJECT_BINARY_DIR}/linker_pass2.cmd)
add_dependencies( kernel_elf linker_pass2_script)
else()
set(logical_target_for_zephyr_elf zephyr_prebuilt)
# Use the prebuilt elf as the final elf since we don't have a
# generation stage.
endif()
# To avoid having the same logical target name for the zephyr lib and
# the zephyr elf, we set the kernel_elf file name to zephyr.elf.
set_target_properties(${logical_target_for_zephyr_elf} PROPERTIES OUTPUT_NAME ${KERNEL_NAME})
set(post_build_commands "")
list_append_ifdef(CONFIG_CHECK_LINK_MAP
post_build_commands
COMMAND ${PYTHON_EXECUTABLE} $ENV{ZEPHYR_BASE}/scripts/check_link_map.py ${KERNEL_MAP_NAME}
)
list_append_ifdef(
CONFIG_BUILD_OUTPUT_HEX
post_build_commands
COMMAND ${CMAKE_OBJCOPY} -S -Oihex -R .comment -R COMMON -R .eh_frame ${KERNEL_ELF_NAME} ${KERNEL_HEX_NAME}
)
list_append_ifdef(
CONFIG_BUILD_OUTPUT_BIN
post_build_commands
COMMAND ${CMAKE_OBJCOPY} -S -Obinary -R .comment -R COMMON -R .eh_frame ${KERNEL_ELF_NAME} ${KERNEL_BIN_NAME}
)
list_append_ifdef(
CONFIG_BUILD_OUTPUT_S19
post_build_commands
COMMAND ${CMAKE_OBJCOPY} --srec-len 1 --output-target=srec ${KERNEL_ELF_NAME} ${KERNEL_S19_NAME}
)
list_append_ifdef(
CONFIG_OUTPUT_DISASSEMBLY
post_build_commands
COMMAND ${CMAKE_OBJDUMP} -S ${KERNEL_ELF_NAME} > ${KERNEL_LST_NAME}
)
list_append_ifdef(
CONFIG_OUTPUT_STAT
post_build_commands
COMMAND ${CMAKE_READELF} -e ${KERNEL_ELF_NAME} > ${KERNEL_STAT_NAME}
)
list_append_ifdef(
CONFIG_BUILD_OUTPUT_STRIPPED
post_build_commands
COMMAND ${CMAKE_STRIP} --strip-all ${KERNEL_ELF_NAME} -o ${KERNEL_STRIP_NAME}
)
list_append_ifdef(
CONFIG_BUILD_OUTPUT_EXE
post_build_commands
COMMAND ${CMAKE_COMMAND} -E rename ${KERNEL_ELF_NAME} ${KERNEL_EXE_NAME}
)
add_custom_command(
TARGET ${logical_target_for_zephyr_elf}
POST_BUILD
${post_build_commands}
COMMENT "Generating files from zephyr.elf for board: ${BOARD}"
# NB: COMMENT only works for some CMake-Generators
)
if(CONFIG_OUTPUT_PRINT_MEMORY_USAGE)
# Use --print-memory-usage with the first link.
#
# Don't use this option with the second link because seeing it twice
# could confuse users and using it on the second link would suppress
# it when the first link has a ram/flash-usage issue.
set(option ${LINKERFLAGPREFIX},--print-memory-usage)
string(MAKE_C_IDENTIFIER check${option} check)
set(SAVED_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS})
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${option}")
check_c_compiler_flag("" ${check})
set(CMAKE_REQUIRED_FLAGS ${SAVED_CMAKE_REQUIRED_FLAGS})
target_link_libraries_ifdef(${check} zephyr_prebuilt ${option})
endif()
if(EMU_PLATFORM)
include($ENV{ZEPHYR_BASE}/cmake/emu/${EMU_PLATFORM}.cmake)
else()
add_custom_target(run
COMMAND
${CMAKE_COMMAND} -E echo
"==================================================="
"Emulation/Simulation not supported with this board."
"==================================================="
)
endif()
add_subdirectory(cmake/flash)
add_subdirectory(cmake/usage)
add_subdirectory(cmake/reports)
include(cmake/ccache.cmake)
if(CONFIG_ASSERT)
message(WARNING "
------------------------------------------------------------
--- WARNING: __ASSERT() statements are globally ENABLED ---
--- The kernel will run more slowly and uses more memory ---
------------------------------------------------------------"
)
endif()
if(CONFIG_BOARD_DEPRECATED)
message(WARNING "
WARNING: The board '${BOARD}' is deprecated and will be
removed in version ${CONFIG_BOARD_DEPRECATED}"
)
endif()
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