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

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

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

  # Additional kernel dependencies
    KERNEL_EXTRA_DEPENDS_TARGET="lz4:host"

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

    EXTRA_CMDLINE="console=ttyS0,115200 console=tty1"

    [ "${DISTRO}" = "Lakka" ] && EXTRA_CMDLINE+=" video=HDMI-A-1:1280x720@60" || true

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

  # Project CFLAGS
    PROJECT_CFLAGS=""

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

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

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

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

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

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

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

  # 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 brcmfmac_sdio-firmware"

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

  # build and install CEC framework support (yes / no)
    CEC_FRAMEWORK_SUPPORT="yes"

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

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

  # additional packages to install:
    ADDITIONAL_PACKAGES+=" dt-overlays"