################################################################################
# setup system defaults
################################################################################

  # The TARGET_CPU variable controls which processor should be targeted for
  # generated code.
    case $TARGET_ARCH in
      aarch64)
        TARGET_CPU="cortex-a53"
        TARGET_CPU_FLAGS="+crc+fp+simd"
        ;;
      arm)
        TARGET_KERNEL_ARCH="arm64"
        TARGET_FLOAT=hard
        TARGET_CPU="cortex-a53"
        TARGET_CPU_FLAGS="+crc"
        TARGET_FPU="neon-fp-armv8"
        ;;
    esac

  # Bootloader to use (syslinux / u-boot / atv-bootloader / bcm2835-bootloader)
    BOOTLOADER="u-boot"

  # U-Boot firmware package(s) to use (this is a bit of a hack as mkbootimg isn't firmware but is needed by the host to build the u-boot uImage)
    UBOOT_FIRMWARE="mkbootimg:host"

  # Kernel target
    KERNEL_TARGET="Image"

  # Kernel uImage load address
    KERNEL_UIMAGE_LOADADDR="0x80080000"

  # Kernel uImage entry address
    KERNEL_UIMAGE_ENTRYADDR="0x80080000"

  # Additional kernel make parameters (for example to specify the u-boot loadaddress)
    KERNEL_MAKE_EXTRACMD="dtbs"

  # Kernel to use. values can be:
  # default:  default mainline kernel
    LINUX="default"

################################################################################
# setup build defaults
################################################################################

  # Project CFLAGS
    PROJECT_CFLAGS=""

  # SquashFS compression method (gzip / lzo / xz)
    SQUASHFS_COMPRESSION="zstd"

################################################################################
# setup project defaults
################################################################################

  # OpenGL(X) implementation to use (no / Mesa)
    OPENGL="no"

  # OpenGL-ES implementation to use (no / bcm2835-driver / gpu-viv-bin-mx6q / opengl-meson6)
    OPENGLES="mesa"

  # Vulkan implementation to use (vulkan-loader / no)
    VULKAN="no"

  # include uvesafb support (yes / no)
    UVESAFB_SUPPORT="no"

  # Displayserver to use (wl / no)
    DISPLAYSERVER="no"

  # Windowmanager to use (weston / no)
    WINDOWMANAGER="no"

  # Xorg Graphic drivers to use (all / freedreno)
  # Space separated list is supported,
  # e.g. GRAPHIC_DRIVERS="freedreno"
    GRAPHIC_DRIVERS="freedreno"

  # KODI Player implementation to use (default / bcm2835-driver / libfslvpuwrap / libamcodec)
    KODIPLAYER_DRIVER="mesa"

  # additional Firmware to use (dvb-firmware, misc-firmware, wlan-firmware)
  # Space separated list is supported,
  # e.g. FIRMWARE="dvb-firmware misc-firmware wlan-firmware"
    FIRMWARE="misc-firmware wlan-firmware dvb-firmware firmware-dragonboard"

    if [ "${DISTRO}" = "Lakka" ]; then
      FIRMWARE="${FIRMWARE//dvb-firmware/}"
    fi

  # build and install driver addons (yes / no)
    DRIVER_ADDONS_SUPPORT="no"

    if [ "${DISTRO}" = "Lakka" ]; then
      DRIVER_ADDONS_SUPPORT="no"
    fi

  # driver addons to install:
  # for a list of additional drivers see packages/linux-driver-addons
  # Space separated list is supported,
    DRIVER_ADDONS="crazycat dvb-latest"

  # build with installer (yes / no)
    INSTALLER_SUPPORT="no"

  # kernel serial console
    EXTRA_CMDLINE="console=ttyMSM0,115200n8 console=tty0"

  # debug tty path
    DEBUG_TTY="/dev/ttyMSM0"

  # set the addon project
    ADDON_PROJECT="ARMv8"