OVMS3-idf/components/esp32/CMakeLists.txt

if(BOOTLOADER_BUILD)
  # For bootloader, all we need from esp32 is headers
  add_library(esp32 INTERFACE)
  target_include_directories(esp32 INTERFACE include)

  # as cmake won't attach linker args to a header-only library, attach
  # linker args directly to the bootloader.elf
  set(BOOTLOADER_LINKER_ARGS "-L ${CMAKE_CURRENT_SOURCE_DIR}/ld -T esp32.rom.ld -Tesp32.rom.spiram_incompatible_fns.ld -T esp32.peripherals.ld" PARENT_SCOPE)

else()
  # Regular app build

  set(COMPONENT_SRCDIRS ". hwcrypto")
  set(COMPONENT_ADD_INCLUDEDIRS "include")

  register_component()

  target_link_libraries(esp32 "-L ${CMAKE_CURRENT_SOURCE_DIR}/lib")
  if(NOT CONFIG_NO_BLOBS)
    target_link_libraries(esp32 coexist core espnow net80211 phy pp rtc smartconfig wpa2 wpa wps)
  endif()
  target_link_libraries(esp32 "-L ${CMAKE_CURRENT_SOURCE_DIR}/ld")
  target_link_libraries(esp32 "-T ${CMAKE_CURRENT_BINARY_DIR}/esp32_out.ld")
  target_link_libraries(esp32 "-T esp32.common.ld")
  target_link_libraries(esp32 "-T esp32.rom.ld")
  target_link_libraries(esp32 "-T esp32.peripherals.ld")

  if(CONFIG_SPIRAM_CACHE_WORKAROUND)
    target_link_libraries(esp32 ${CMAKE_CURRENT_SOURCE_DIR}/libstdc++-psram-workaround.a)
  else()
    target_link_libraries(esp32 "-T esp32.rom.spiram_incompatible_fns.ld")
  endif()

  if(CONFIG_NEWLIB_NANO_FORMAT)
    target_link_libraries(esp32 "-T esp32.rom.nanofmt.ld")
  endif()

  if(NOT CONFIG_SPI_FLASH_ROM_DRIVER_PATCH)
    target_link_libraries(esp32 "-T esp32.rom.spiflash.ld")
  endif()

  target_link_libraries(esp32 "${CMAKE_CURRENT_SOURCE_DIR}/libhal.a")
  target_link_libraries(esp32 gcc)
  target_link_libraries(esp32 "-u call_user_start_cpu0")

  #ld_include_panic_highint_hdl is added as an undefined symbol because otherwise the
#linker will ignore panic_highint_hdl.S as it has no other files depending on any
#symbols in it.
  target_link_libraries(esp32 "-u ld_include_panic_highint_hdl")

  # Preprocess esp32.ld linker script to include configuration, becomes esp32_out.ld
  set(LD_DIR ${CMAKE_CURRENT_SOURCE_DIR}/ld)
  add_custom_command(
    OUTPUT esp32_out.ld
    COMMAND "${CMAKE_C_COMPILER}" -C -P -x c -E -o esp32_out.ld -I ${CMAKE_BINARY_DIR} ${LD_DIR}/esp32.ld
    MAIN_DEPENDENCY ${LD_DIR}/esp32.ld
    COMMENT "Generating linker script..."
    VERBATIM)
  add_custom_target(esp32_linker_script DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/esp32_out.ld)
  add_dependencies(esp32 esp32_linker_script)

  if(CONFIG_ESP32_PHY_INIT_DATA_IN_PARTITION)
    set(PHY_INIT_DATA_BIN phy_init_data.bin)

    # To get the phy_init_data.bin file, compile phy_init_data.h as a C file and then objcopy the object file to a raw binary
    add_custom_command(
      OUTPUT ${PHY_INIT_DATA_BIN}
      DEPENDS ${CMAKE_CURRENT_LIST_DIR}/phy_init_data.h
      COMMAND ${CMAKE_C_COMPILER} -x c -c -o phy_init_data.obj -I ${CMAKE_CURRENT_LIST_DIR} -I ${CMAKE_CURRENT_LIST_DIR}/include -I ${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_LIST_DIR}/phy_init_data.h
      COMMAND ${CMAKE_OBJCOPY} -O binary phy_init_data.obj ${PHY_INIT_DATA_BIN}
      )
    add_custom_target(phy_init_data ALL DEPENDS ${PHY_INIT_DATA_BIN})
    add_dependencies(flash phy_init_data)

  endif(CONFIG_ESP32_PHY_INIT_DATA_IN_PARTITION)

endif(BOOTLOADER_BUILD)