blob: 57374c1f5eda6b69f8bfb2fd14662afd065fff6b [file] [log] [blame]
if (NOT TARGET pico_standard_link)
pico_add_library(pico_standard_link NOFLAG)
target_sources(pico_standard_link INTERFACE
${CMAKE_CURRENT_LIST_DIR}/crt0.S
${CMAKE_CURRENT_LIST_DIR}/new_delete.cpp
${CMAKE_CURRENT_LIST_DIR}/binary_info.c
)
pico_add_map_output(pico_standard_link)
# todo revisit when we do Clang
if (CMAKE_C_COMPILER_ID STREQUAL "Clang")
target_link_options(pico_standard_link INTERFACE "LINKER:-nostdlib")
endif ()
pico_mirrored_target_link_libraries(pico_standard_link INTERFACE hardware_regs pico_bootrom pico_binary_info)
target_link_libraries(pico_standard_link INTERFACE pico_cxx_options boot_stage2_headers)
function(pico_add_link_depend TARGET dependency)
get_target_property(target_type ${TARGET} TYPE)
if (${target_type} STREQUAL "INTERFACE_LIBRARY")
set(PROP "INTERFACE_LINK_DEPENDS")
else()
set(PROP "LINK_DEPENDS")
endif()
get_target_property(_LINK_DEPENDS ${TARGET} ${PROP})
if (NOT _LINK_DEPENDS)
set(_LINK_DEPENDS ${dependency})
else()
list(APPEND _LINK_DEPENDS ${dependency})
endif()
set_target_properties(${TARGET} PROPERTIES ${PROP} "${_LINK_DEPENDS}")
endfunction()
# need this because cmake does not appear to have a way to override an INTERFACE variable
function(pico_set_linker_script TARGET LDSCRIPT)
set_target_properties(${TARGET} PROPERTIES PICO_TARGET_LINKER_SCRIPT ${LDSCRIPT})
pico_add_link_depend(${TARGET} ${LDSCRIPT})
endfunction()
function(pico_set_binary_type TARGET TYPE)
set_target_properties(${TARGET} PROPERTIES PICO_TARGET_BINARY_TYPE ${TYPE})
endfunction()
if (PICO_NO_FLASH)
set(PICO_DEFAULT_BINARY_TYPE no_flash)
elseif (PICO_USE_BLOCKED_RAM)
set(PICO_DEFAULT_BINARY_TYPE blocked_ram)
elseif (PICO_COPY_TO_RAM)
set(PICO_DEFAULT_BINARY_TYPE copy_to_ram)
else()
set(PICO_DEFAULT_BINARY_TYPE default)
endif()
# LINKER script will be PICO_TARGET_LINKER_SCRIPT if set on target, or ${CMAKE_CURRENT_LIST_DIR}/memmap_foo.ld
# if PICO_TARGET_BINARY_TYPE is set to foo on the target, otherwise ${CMAKE_CURRENT_LIST_DIR}/memmap_${PICO_DEFAULT_BINARY_TYPE).ld
target_link_options(pico_standard_link INTERFACE
"LINKER:--script=$<IF:$<BOOL:$<TARGET_PROPERTY:PICO_TARGET_LINKER_SCRIPT>>,$<TARGET_PROPERTY:PICO_TARGET_LINKER_SCRIPT>,${CMAKE_CURRENT_LIST_DIR}/memmap_$<IF:$<STREQUAL:$<TARGET_PROPERTY:PICO_TARGET_BINARY_TYPE>,>,${PICO_DEFAULT_BINARY_TYPE},$<TARGET_PROPERTY:PICO_TARGET_BINARY_TYPE>>.ld>"
)
# PICO_NO_FLASH will be set based on PICO_TARGET_BUILD_TYPE target property being equal to no_flash if set, otherwise to the value of the PICO_NO_FLASH cmake variable unless PICO_TARGET_TYPE is set to something else
# PICO_BUILD_DEFINE: PICO_NO_FLASH, whether this is a 'no_flash' build, type=bool, default=0, but dependent on CMake options, group=pico_standard_link
target_compile_definitions(pico_standard_link INTERFACE PICO_NO_FLASH=$<IF:$<STREQUAL:$<TARGET_PROPERTY:PICO_TARGET_BINARY_TYPE>,no_flash>,1,$<AND:$<BOOL:${PICO_NO_FLASH}>,$<STREQUAL:,$<TARGET_PROPERTY:PICO_TARGET_BINARY_TYPE>>>>)
# PICO_USE_BLOCKED_RAM will be set based on PICO_TARGET_BUILD_TYPE target property being equal to use_blocked_ram if set, otherwise to the value of the PICO_USE_BLOCKED_RAM cmake variable unless PICO_TARGET_TYPE is set to something else
# PICO_BUILD_DEFINE: PICO_USE_BLOCKED_RAM, whether this is a 'blocked_ram' build, type=bool, default=0, but dependent on CMake options, group=pico_standard_link
target_compile_definitions(pico_standard_link INTERFACE PICO_USE_BLOCKED_RAM=$<IF:$<STREQUAL:$<TARGET_PROPERTY:PICO_TARGET_BINARY_TYPE>,use_blocked_ram>,1,$<AND:$<BOOL:${PICO_USE_BLOCKED_RAM}>,$<STREQUAL:,$<TARGET_PROPERTY:PICO_TARGET_BINARY_TYPE>>>>)
# PICO_COPY_TO_RAM will be set based on PICO_TARGET_BUILD_TYPE target property being equal to copy_to_ram if set, otherwise to the value of the PICO_COPY_TO_RAM cmake variable unless PICO_TARGET_TYPE is set to something else
# PICO_BUILD_DEFINE: PICO_COPY_TO_RAM, whether this is a 'copy_to_ram' build, type=bool, default=0, but dependent on CMake options, group=pico_standard_link
target_compile_definitions(pico_standard_link INTERFACE PICO_COPY_TO_RAM=$<IF:$<STREQUAL:$<TARGET_PROPERTY:PICO_TARGET_BINARY_TYPE>,copy_to_ram>,1,$<AND:$<BOOL:${PICO_COPY_TO_RAM}>,$<STREQUAL:,$<TARGET_PROPERTY:PICO_TARGET_BINARY_TYPE>>>>)
target_compile_definitions(pico_standard_link INTERFACE PICO_CMAKE_BUILD_TYPE="${CMAKE_BUILD_TYPE}")
if (PICO_DEOPTIMIZED_DEBUG AND "${CMAKE_BUILD_TYPE}" STREQUAL "Debug")
target_compile_definitions(pico_standard_link INTERFACE PICO_DEOPTIMIZED_DEBUG=1)
endif()
# todo revisit/recall reasoning for why not -nostartfiles always?
# -nostartfiles will be added if PICO_NO_FLASH would be defined to 1
target_link_options(pico_standard_link INTERFACE $<$<IF:$<STREQUAL:$<TARGET_PROPERTY:PICO_TARGET_BINARY_TYPE>,no_flash>,1,$<AND:$<BOOL:${PICO_NO_FLASH}>,$<STREQUAL:,$<TARGET_PROPERTY:PICO_TARGET_BINARY_TYPE>>>>:-nostartfiles>)
# boot_stage2 will be linked if PICO_NO_FLASH would be defined to 0
target_link_libraries(pico_standard_link INTERFACE $<$<NOT:$<IF:$<STREQUAL:$<TARGET_PROPERTY:PICO_TARGET_BINARY_TYPE>,no_flash>,1,$<AND:$<BOOL:${PICO_NO_FLASH}>,$<STREQUAL:,$<TARGET_PROPERTY:PICO_TARGET_BINARY_TYPE>>>>>:$<IF:$<BOOL:$<TARGET_PROPERTY:PICO_TARGET_BOOT_STAGE2>>,$<TARGET_PROPERTY:PICO_TARGET_BOOT_STAGE2>,bs2_default>_library>)
# PICO_CMAKE_CONFIG: PICO_USE_DEFAULT_MAX_PAGE_SIZE, Don't shrink linker max page to 4096, type=bool, default=0, advanced=true, group=pico_standard_link
if (NOT PICO_USE_DEFAULT_MAX_PAGE_SIZE)
target_link_options(pico_standard_link INTERFACE "LINKER:-z,max-page-size=4096")
endif()
# done in compiler now
#target_link_options(pico_standard_link INTERFACE "LINKER:--build-id=none")
# this line occasionally useful for debugging ... todo maybe make a PICO_ var
# target_compile_options(pico_standard_link INTERFACE --save-temps) #debugging only
# PICO_CMAKE_CONFIG: PICO_NO_GC_SECTIONS, Disable -ffunction-sections -fdata-sections and --gc-sections, type=bool, default=0, advanced=true, group=pico_standard_link
if (NOT PICO_NO_GC_SECTIONS)
target_compile_options(pico_standard_link INTERFACE -ffunction-sections -fdata-sections)
target_link_options(pico_standard_link INTERFACE "LINKER:--gc-sections")
endif()
if ("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU")
# Ignore warnings about rwx segments introduced in binutils 2.39
execute_process(COMMAND ${CMAKE_C_COMPILER} -print-prog-name=ld RESULT_VARIABLE RUN_C_RESULT OUTPUT_VARIABLE FULL_LD_PATH
OUTPUT_STRIP_TRAILING_WHITESPACE)
if (${RUN_C_RESULT} EQUAL 0)
execute_process(COMMAND ${FULL_LD_PATH} --help RESULT_VARIABLE RUN_LD_RESULT OUTPUT_VARIABLE LD_HELP_OUTPUT
OUTPUT_STRIP_TRAILING_WHITESPACE)
if (${RUN_LD_RESULT} EQUAL 0)
set(RWX_WARNING "no-warn-rwx-segments")
string(FIND "${LD_HELP_OUTPUT}" "${RWX_WARNING}" LD_RWX_WARNING_SUPPORTED)
if (${LD_RWX_WARNING_SUPPORTED} GREATER -1)
target_link_options(pico_standard_link INTERFACE "LINKER:--${RWX_WARNING}")
endif()
endif()
endif()
endif()
endif()