boot: zephyr: Fix build issue for multiple conf files

    )

endif()

# CONF_FILE points to the KConfig configuration file of the bootloader

get_filename_component(CONF_DIR ${CONF_FILE} DIRECTORY)

# CONF_FILE points to the KConfig configuration files of the bootloader.

foreach (filepath ${CONF_FILE})

  file(READ ${filepath} temp_text)

  string(FIND "${temp_text}" ${CONFIG_BOOT_SIGNATURE_KEY_FILE} match)

  if (${match} GREATER_EQUAL 0)

    if (NOT DEFINED CONF_DIR)

      get_filename_component(CONF_DIR ${filepath} DIRECTORY)

    else()

      message(FATAL_ERROR "Signature key file defined in multiple conf files")

    endif()

  endif()

endforeach()

if(NOT CONFIG_BOOT_SIGNATURE_KEY_FILE STREQUAL "")

  if(IS_ABSOLUTE ${CONFIG_BOOT_SIGNATURE_KEY_FILE})

    set(KEY_FILE ${CONFIG_BOOT_SIGNATURE_KEY_FILE})

  elseif(EXISTS ${CONF_DIR}/${CONFIG_BOOT_SIGNATURE_KEY_FILE})

  elseif((DEFINED CONF_DIR) AND

	 (EXISTS ${CONF_DIR}/${CONFIG_BOOT_SIGNATURE_KEY_FILE}))

    set(KEY_FILE ${CONF_DIR}/${CONFIG_BOOT_SIGNATURE_KEY_FILE})

  else()

    set(KEY_FILE ${MCUBOOT_DIR}/${CONFIG_BOOT_SIGNATURE_KEY_FILE})

  endif()

  message("MCUBoot bootloader key file: ${KEY_FILE}")

  set(GENERATED_PUBKEY ${ZEPHYR_BINARY_DIR}/autogen-pubkey.c)

  add_custom_command(

    OUTPUT ${GENERATED_PUBKEY}