cmake_minimum_required(VERSION 3.22)
# micrOBU firmware: the ESP32-C5 half of the VRU ITS-S on the external vanetza-idf component
# (tracked directly in this repository at external/vanetza-idf; see external/vanetza-idf/PROVENANCE.md).

# Provenance guard for main/otm_tx_custom.c (implementation/provenance/adapted-code.yaml, key
# otm-c5-radio-tx-custom): this checked-in copy -- not the vanetza-idf submodule's own
# radio_c5.cmake-generated one, which builds into vanetza_idf::C5Radio, a class this firmware
# never references -- is what microbu::C5Radio::request() and C5Radio::transmit_burst() actually
# link against for every over-the-air transmission. Fail configure if either the pinned upstream
# (when the nested OTM submodule is checked out) or this file drifts from the reviewed revision,
# so a silent edit to either can no longer pass unnoticed the way it previously could.
set(_otm_upstream "${CMAKE_CURRENT_LIST_DIR}/../external/vanetza-idf/ports/esp_idf/third_party/otm/main/tx_custom.c")
if(EXISTS "${_otm_upstream}")
    file(READ "${_otm_upstream}" _otm_upstream_text)
    string(REPLACE "\r\n" "\n" _otm_upstream_text "${_otm_upstream_text}")
    string(SHA256 _otm_upstream_hash "${_otm_upstream_text}")
    if(NOT _otm_upstream_hash STREQUAL "cb1dccfef96912ca59275e8a9102f41f56925b94a19d4a4629082aaeb779be1b")
        message(FATAL_ERROR "OpenTrafficMap upstream tx_custom.c (nested submodule third_party/otm) differs from the reviewed source revision (674e3412) -- review before updating main/otm_tx_custom.c and this hash")
    endif()
endif()
set(_otm_checked_in "${CMAKE_CURRENT_LIST_DIR}/main/otm_tx_custom.c")
file(READ "${_otm_checked_in}" _otm_checked_in_text)
string(REPLACE "\r\n" "\n" _otm_checked_in_text "${_otm_checked_in_text}")
string(SHA256 _otm_checked_in_hash "${_otm_checked_in_text}")
if(NOT _otm_checked_in_hash STREQUAL "114693af99ce3866cfc767066d484e45822eaf15335d94a03626b60ac5777277")
    message(FATAL_ERROR "main/otm_tx_custom.c differs from the reviewed copy -- update implementation/provenance/adapted-code.yaml (key otm-c5-radio-tx-custom) and this hash after reviewing the change")
endif()

list(APPEND EXTRA_COMPONENT_DIRS "${CMAKE_CURRENT_LIST_DIR}/../external/vanetza-idf")
set(SDKCONFIG_DEFAULTS "${CMAKE_CURRENT_LIST_DIR}/sdkconfig.defaults")
set(COMPONENTS main)
include($ENV{IDF_PATH}/tools/cmake/project.cmake)
project(microbu_firmware)
add_compile_options(-Wno-error -Wno-cpp -Wno-error=implicit-function-declaration)
idf_component_get_property(vanetza_lib vanetza-idf COMPONENT_LIB)
if(vanetza_lib)
    target_compile_options(${vanetza_lib} PRIVATE -Wno-error=implicit-function-declaration -Wno-error=cpp)
endif()
# GCC 15's stricter -Warray-bounds false-positives on NimBLE's fixed-size bond-store arrays
# (upstream Apache Mynewt code, not ours); demote to a warning so the component still builds.
idf_component_get_property(bt_lib bt COMPONENT_LIB)
if(bt_lib)
    target_compile_options(${bt_lib} PRIVATE -Wno-error=array-bounds)
endif()