cmake/linker/ld/linker_flags.cmake

# Copyright (c) 2024 Nordic Semiconductor
#
# SPDX-License-Identifier: Apache-2.0

check_set_linker_property(TARGET linker PROPERTY base
                          ${LINKERFLAGPREFIX},--gc-sections
                          ${LINKERFLAGPREFIX},--build-id=none
)

check_set_linker_property(TARGET linker PROPERTY baremetal
                          -nostdlib
                          -static
                          ${LINKERFLAGPREFIX},-X
                          ${LINKERFLAGPREFIX},-N
)

check_set_linker_property(TARGET linker PROPERTY orphan_warning
                          ${LINKERFLAGPREFIX},--orphan-handling=warn
)

check_set_linker_property(TARGET linker PROPERTY orphan_error
                          ${LINKERFLAGPREFIX},--orphan-handling=error
)

set_property(TARGET linker PROPERTY undefined ${LINKERFLAGPREFIX},--undefined=)

check_set_linker_property(TARGET linker PROPERTY memusage "${LINKERFLAGPREFIX},--print-memory-usage")

check_set_linker_property(TARGET linker PROPERTY sanitizer_undefined -fsanitize=undefined)
check_set_linker_property(TARGET linker PROPERTY sanitizer_undefined_trap -fsanitize-undefined-trap-on-error)
check_set_linker_property(TARGET linker PROPERTY sanitizer_undefined_library)

# -no-pie is not supported until binutils 2.37.
# If -no-pie is passed to old binutils <= 2.36, it is parsed
# as separate arguments -n and -o, which results in output file
# called "-pie".
if("${GNULD_VERSION_STRING}" VERSION_GREATER_EQUAL 2.37)
  set_property(TARGET linker PROPERTY no_position_independent "${LINKERFLAGPREFIX},-no-pie")
else()
  set_property(TARGET linker PROPERTY no_position_independent)
endif()

set_property(TARGET linker PROPERTY partial_linking "-r")

set_property(TARGET linker PROPERTY lto_arguments -flto=auto -fno-ipa-sra -ffunction-sections -fdata-sections)

check_set_linker_property(TARGET linker PROPERTY no_relax ${LINKERFLAGPREFIX},--no-relax)

check_set_linker_property(TARGET linker PROPERTY sort_alignment
                          ${LINKERFLAGPREFIX},--sort-common=descending
                          ${LINKERFLAGPREFIX},--sort-section=alignment
)

# Some linker flags might not be purely ld specific, but a combination of
# linker and compiler, such as:
# --coverage for clang
# --gcov for gcc
# So load those flags now.
include(${ZEPHYR_BASE}/cmake/linker/${LINKER}/${COMPILER}/linker_flags.cmake OPTIONAL)