1# Distribution definition for: poky-tiny 2# 3# Copyright (c) 2011, Intel Corporation. 4# All rights reserved. 5# 6# This file is released under the MIT license as described in 7# ../meta/COPYING.MIT. 8# 9# Poky-tiny is intended to define a tiny Linux system comprised of a 10# Linux kernel tailored to support each specific MACHINE and busybox. 11# Poky-tiny sets some basic policy to ensure a usable system while still 12# keeping the rootfs and kernel image as small as possible. 13# 14# The policies defined are intended to meet the following goals: 15# o Serial consoles only (no framebuffer or VGA console) 16# o Basic support for IPV4 networking 17# o Single user ash shell 18# o Static images (no support for adding packages or libraries later) 19# o Read-only or RAMFS root filesystem 20# o Combined Linux kernel + rootfs in under 4MB 21# o Allow the user to select between eglibc or uclibc with the TCLIBC variable 22# 23# This is currently a partial definition, the following tasks remain: 24# [ ] Integrate linux-yocto-tiny ktype into linux-yocto 25# [ ] Define linux-yocto-tiny configs for all supported BSPs 26# [ ] Drop ldconfig from the installation 27# [ ] Modify the runqemu scripts to work with ext2 parameter: 28# runqemu qemux86 qemuparams="-nographic" bootparams="console=ttyS0,115200 root=0800" 29# [ ] Modify busybox to allow for DISTRO_FEATURES-like confiruration 30 31require conf/distro/poky.conf 32DISTRO = "poky-tiny" 33DISTROOVERRIDES = "poky:poky-tiny" 34TCLIBC = "musl" 35# FIXME: consider adding a new "tiny" feature 36#DISTRO_FEATURES_append = " tiny" 37 38# Distro config is evaluated after the machine config, so we have to explicitly 39# set the kernel provider to override a machine config. 40PREFERRED_PROVIDER_virtual/kernel = "linux-yocto-tiny" 41PREFERRED_VERSION_linux-yocto-tiny ?= "4.14%" 42 43# We can use packagegroup-core-boot, but in the future we may need a new packagegroup-core-tiny 44#POKY_DEFAULT_EXTRA_RDEPENDS += "packagegroup-core-boot" 45# Drop kernel-module-af-packet from RRECOMMENDS 46POKY_DEFAULT_EXTRA_RRECOMMENDS = "" 47 48# FIXME: what should we do with this? 49TCLIBCAPPEND = "" 50 51# Disable wide char support for ncurses as we don't include it in 52# in the LIBC features below. 53# Leave native enable to avoid build failures 54ENABLE_WIDEC = "false" 55ENABLE_WIDEC_class-native = "true" 56 57# Drop native language support. This removes the 58# eglibc->bash->gettext->libc-posix-clang-wchar dependency. 59USE_NLS="no" 60 61# Comment out any of the lines below to disable them in the build 62# DISTRO_FEATURES options: 63# alsa bluetooth ext2 irda pcmcia usbgadget usbhost wifi nfs zeroconf pci 64DISTRO_FEATURES_TINY = "pci" 65DISTRO_FEATURES_NET = "ipv4 ipv6" 66DISTRO_FEATURES_USB = "usbhost" 67#DISTRO_FEATURES_USBGADGET = "usbgadget" 68#DISTRO_FEATURES_WIFI = "wifi" 69 70DISTRO_FEATURES = "${DISTRO_FEATURES_TINY} \ 71 ${DISTRO_FEATURES_NET} \ 72 ${DISTRO_FEATURES_USB} \ 73 ${DISTRO_FEATURES_USBGADGET} \ 74 ${DISTRO_FEATURES_WIFI} \ 75 " 76 77# Enable LFS - see bug YOCTO #5865 78DISTRO_FEATURES_append_libc-uclibc = " largefile" 79DISTRO_FEATURES_append_libc-musl = " largefile" 80 81DISTRO_FEATURES_class-native = "${DISTRO_FEATURES_DEFAULT} ${DISTRO_FEATURES_LIBC} ${POKY_DEFAULT_DISTRO_FEATURES}" 82DISTRO_FEATURES_class-nativesdk = "${DISTRO_FEATURES_DEFAULT} ${DISTRO_FEATURES_LIBC} ${POKY_DEFAULT_DISTRO_FEATURES}" 83 84# enable mdev/busybox for init 85VIRTUAL-RUNTIME_dev_manager = "busybox-mdev" 86VIRTUAL-RUNTIME_login_manager = "busybox" 87VIRTUAL-RUNTIME_init_manager = "busybox" 88VIRTUAL-RUNTIME_initscripts = "initscripts" 89VIRTUAL-RUNTIME_keymaps = "keymaps" 90DISTRO_FEATURES_BACKFILL_CONSIDERED += "sysvinit" 91 92# FIXME: Consider adding "modules" to MACHINE_FEATURES and using that in 93# packagegroup-core-base to select modutils-initscripts or not. Similar with "net" and 94# netbase. 95 96# By default we only support initramfs. We don't build live as that 97# pulls in a lot of dependencies for the live image and the installer, like 98# udev, grub, etc. These pull in gettext, which fails to build with wide 99# character support. 100IMAGE_FSTYPES = "cpio.gz" 101 102QB_DEFAULT_FSTYPE = "${IMAGE_FSTYPES}" 103 104# Drop v86d from qemu dependency list (we support serial) 105# Drop grub from meta-intel BSPs 106# FIXME: A different mechanism is needed here. We could define -tiny 107# variants of all compatible machines, but that leads to a lot 108# more machine configs to maintain long term. 109MACHINE_ESSENTIAL_EXTRA_RDEPENDS = "" 110 111# The mtrace script included by eglibc is a perl script. This means the system 112# will build perl in case this package is installed. Since we don't care about 113# this script for the purposes of tiny, remove the dependency from here. 114RDEPENDS_${PN}-mtrace_pn-eglibc = "" 115 116PNBLACKLIST[build-appliance-image] = "not buildable with poky-tiny" 117PNBLACKLIST[core-image-base] = "not buildable with poky-tiny" 118PNBLACKLIST[core-image-clutter] = "not buildable with poky-tiny" 119PNBLACKLIST[core-image-full-cmdline] = "not buildable with poky-tiny" 120PNBLACKLIST[core-image-lsb] = "not buildable with poky-tiny" 121PNBLACKLIST[core-image-lsb-dev] = "not buildable with poky-tiny" 122PNBLACKLIST[core-image-lsb-sdk] = "not buildable with poky-tiny" 123PNBLACKLIST[core-image-rt] = "not buildable with poky-tiny" 124PNBLACKLIST[core-image-rt-sdk] = "not buildable with poky-tiny" 125PNBLACKLIST[core-image-sato] = "not buildable with poky-tiny" 126PNBLACKLIST[core-image-sato-dev] = "not buildable with poky-tiny" 127PNBLACKLIST[core-image-sato-sdk] = "not buildable with poky-tiny" 128PNBLACKLIST[core-image-x11] = "not buildable with poky-tiny" 129PNBLACKLIST[core-image-weston] = "not buildable with poky-tiny" 130 131# Disable python usage in opkg-utils since it won't build with tiny config 132PACKAGECONFIG_remove_pn-opkg-utils = "python" 133