kconfig: cmake: CMake linker script generator symbol added
A "Linker script" choice group has been added to the linker options menu. The existing HAVE_CUSTOM_LINKER_SCRIPT config has been relocated inside the linker script menu. Two new entries has been created: - LD template, for using the old ld template files together with the C pre-processor to create the final linker script. - CMake linker generator, used for ARMClang / armlink toolchain. The CMake linker generator is also supported for LD linker scripts for the ARM architecture. In CMake, the file cmake/linker/ld/target.cmake has been updated to support the CMake LD linker generator. Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
This commit is contained in:
Torsten Rasmussen
Anas Nashif
parent
e9e47a45dd
commit
761eada9d3
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@ -132,8 +132,36 @@ config ROM_START_OFFSET
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alignment requirements on most ARM targets, although some targets
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may require smaller or larger values.
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config LD_LINKER_SCRIPT_SUPPORTED
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bool
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default y
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choice LINKER_SCRIPT
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prompt "Linker script"
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default LD_LINKER_TEMPLATE if LD_LINKER_SCRIPT_SUPPORTED
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config LD_LINKER_TEMPLATE
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bool "LD template"
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depends on LD_LINKER_SCRIPT_SUPPORTED
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help
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Select this option to use the LD linker script templates.
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The templates are pre-processed by the C pre-processor to create the
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final LD linker script.
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config CMAKE_LINKER_GENERATOR
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bool "CMake generator"
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depends on ARM
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help
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Select this option to use the Zephyr CMake linker script generator.
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The linker configuration is written in CMake and the final linker
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script will be generated by the toolchain specific linker generator.
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For LD based linkers, this will be the ld generator, for ARMClang /
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armlink based linkers it will be the scatter generator.
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endchoice
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config HAVE_CUSTOM_LINKER_SCRIPT
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bool "Custom linker scripts provided"
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bool "Custom linker script provided"
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help
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Set this option if you have a custom linker script which needed to
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be define in CUSTOM_LINKER_SCRIPT.
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@ -31,51 +31,74 @@ endif()
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macro(configure_linker_script linker_script_gen linker_pass_define)
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set(extra_dependencies ${ARGN})
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# Different generators deal with depfiles differently.
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if(CMAKE_GENERATOR STREQUAL "Unix Makefiles")
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# Note that the IMPLICIT_DEPENDS option is currently supported only
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# for Makefile generators and will be ignored by other generators.
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set(linker_script_dep IMPLICIT_DEPENDS C ${LINKER_SCRIPT})
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elseif(CMAKE_GENERATOR STREQUAL "Ninja")
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# Using DEPFILE with other generators than Ninja is an error.
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set(linker_script_dep DEPFILE ${PROJECT_BINARY_DIR}/${linker_script_gen}.dep)
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if(CONFIG_CMAKE_LINKER_GENERATOR)
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if("${linker_pass_define}" STREQUAL "-DLINKER_ZEPHYR_PREBUILT")
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set(PASS 1)
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elseif("${linker_pass_define}" STREQUAL "-DLINKER_ZEPHYR_FINAL;-DLINKER_PASS2")
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set(PASS 2)
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endif()
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add_custom_command(
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OUTPUT ${linker_script_gen}
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COMMAND ${CMAKE_COMMAND}
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-DPASS=${PASS}
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-DFORMAT="$<TARGET_PROPERTY:linker,FORMAT>"
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-DENTRY="$<TARGET_PROPERTY:linker,ENTRY>"
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-DMEMORY_REGIONS="$<TARGET_PROPERTY:linker,MEMORY_REGIONS>"
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-DGROUPS="$<TARGET_PROPERTY:linker,GROUPS>"
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-DSECTIONS="$<TARGET_PROPERTY:linker,SECTIONS>"
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-DSECTION_SETTINGS="$<TARGET_PROPERTY:linker,SECTION_SETTINGS>"
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-DSYMBOLS="$<TARGET_PROPERTY:linker,SYMBOLS>"
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-DOUT_FILE=${CMAKE_CURRENT_BINARY_DIR}/${linker_script_gen}
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-P ${ZEPHYR_BASE}/cmake/linker/ld/ld_script.cmake
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)
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else()
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# TODO: How would the linker script dependencies work for non-linker
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# script generators.
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message(STATUS "Warning; this generator is not well supported. The
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Linker script may not be regenerated when it should.")
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set(linker_script_dep "")
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# Different generators deal with depfiles differently.
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if(CMAKE_GENERATOR STREQUAL "Unix Makefiles")
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# Note that the IMPLICIT_DEPENDS option is currently supported only
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# for Makefile generators and will be ignored by other generators.
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set(linker_script_dep IMPLICIT_DEPENDS C ${LINKER_SCRIPT})
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elseif(CMAKE_GENERATOR STREQUAL "Ninja")
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# Using DEPFILE with other generators than Ninja is an error.
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set(linker_script_dep DEPFILE ${PROJECT_BINARY_DIR}/${linker_script_gen}.dep)
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else()
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# TODO: How would the linker script dependencies work for non-linker
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# script generators.
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message(STATUS "Warning; this generator is not well supported. The
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Linker script may not be regenerated when it should.")
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set(linker_script_dep "")
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endif()
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zephyr_get_include_directories_for_lang(C current_includes)
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get_filename_component(base_name ${CMAKE_CURRENT_BINARY_DIR} NAME)
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get_property(current_defines GLOBAL PROPERTY PROPERTY_LINKER_SCRIPT_DEFINES)
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add_custom_command(
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OUTPUT ${linker_script_gen}
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DEPENDS
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${LINKER_SCRIPT}
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${AUTOCONF_H}
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${extra_dependencies}
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# NB: 'linker_script_dep' will use a keyword that ends 'DEPENDS'
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${linker_script_dep}
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COMMAND ${CMAKE_C_COMPILER}
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-x assembler-with-cpp
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${NOSYSDEF_CFLAG}
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-MD -MF ${linker_script_gen}.dep -MT ${base_name}/${linker_script_gen}
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-D_LINKER
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-D_ASMLANGUAGE
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-imacros ${AUTOCONF_H}
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${current_includes}
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${current_defines}
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${linker_pass_define}
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-E ${LINKER_SCRIPT}
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-P # Prevent generation of debug `#line' directives.
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-o ${linker_script_gen}
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VERBATIM
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WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
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COMMAND_EXPAND_LISTS
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)
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endif()
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zephyr_get_include_directories_for_lang(C current_includes)
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get_filename_component(base_name ${CMAKE_CURRENT_BINARY_DIR} NAME)
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get_property(current_defines GLOBAL PROPERTY PROPERTY_LINKER_SCRIPT_DEFINES)
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add_custom_command(
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OUTPUT ${linker_script_gen}
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DEPENDS
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${LINKER_SCRIPT}
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${AUTOCONF_H}
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${extra_dependencies}
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# NB: 'linker_script_dep' will use a keyword that ends 'DEPENDS'
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${linker_script_dep}
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COMMAND ${CMAKE_C_COMPILER}
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-x assembler-with-cpp
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${NOSYSDEF_CFLAG}
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-MD -MF ${linker_script_gen}.dep -MT ${base_name}/${linker_script_gen}
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-D_LINKER
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-D_ASMLANGUAGE
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-imacros ${AUTOCONF_H}
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${current_includes}
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${current_defines}
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${linker_pass_define}
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-E ${LINKER_SCRIPT}
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-P # Prevent generation of debug `#line' directives.
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-o ${linker_script_gen}
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VERBATIM
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WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
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COMMAND_EXPAND_LISTS
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)
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endmacro()
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# Force symbols to be entered in the output file as undefined symbols
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