set(RTEMS_CONFIG_DIR 
    "${CMAKE_CURRENT_SOURCE_DIR}/cmake/rtems-cmake"
    CACHE FILEPATH
    "Directory containing the RTEMS *.cmake files"
)

include(${RTEMS_CONFIG_DIR}/RTEMSPreProjectConfig.cmake)

if(NOT DEFINED RTEMS_PREFIX)
    if(NOT DEFINED ENV{RTEMS_PREFIX})
        message(FATAL_ERROR 
            "RTEMS_PREFIX must be set either manually or as an environment "
            "variable!"
        )
    else()
        message(STATUS 
            "Using environment variable RTEMS_PREFIX $ENV{RTEMS_PREFIX} "
            "as RTEMS prefix"
         )
        set(RTEMS_PREFIX $ENV{RTEMS_PREFIX})
    endif()
endif()

if(TGT_BSP MATCHES "arm/stm32h743zi-nucleo")
    set(RTEMS_BSP "arm/nucleo-h743zi")
else()
    if(NOT DEFINED RTEMS_BSP)
        if(NOT DEFINED ENV{RTEMS_BSP})
            message(FATAL_ERROR 
                "RTEMS_BSP must be set either manually or as an environment variable!"
            )
        else()
            set(RTEMS_BSP $ENV{RTEMS_BSP})
        endif()
    endif()
endif()

rtems_pre_project_config(${RTEMS_PREFIX} ${RTEMS_BSP})

set(CMAKE_TOOLCHAIN_FILE ${RTEMS_CONFIG_DIR}/RTEMSToolchain.cmake)

set(RTEMS_BSP ${RTEMS_BSP} CACHE STRING "RTEMS BSP")
set(RTEMS_PREFIX ${RTEMS_PREFIX} CACHE STRING "RTEMS Prefix")