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1# Distribution definition for: poky-tiny
2#
3# Copyright (c) 2011, Intel Corporation.
4# All rights reserved.
5#
6# Poky-tiny is intended to define a tiny Linux system comprised of a
7# Linux kernel tailored to support each specific MACHINE and busybox.
8# Poky-tiny sets some basic policy to ensure a usable system while still
9# keeping the rootfs and kernel image as small as possible.
10#
11# The policies defined are intended to meet the following goals:
12# o Serial consoles only (no framebuffer or VGA console)
13# o Basic support for IPV4 networking
14# o Single user ash shell
15# o Static images (no support for adding packages or libraries later)
16# o Read-only or RAMFS root filesystem
17# o Combined Linux kernel + rootfs in under 4MB
18# o Allow the user to select between eglibc or uclibc with the TCLIBC variable
19#
20# This is currently a partial definition, the following tasks remain:
21# [ ] Integrate linux-yocto-tiny ktype into linux-yocto
22# [ ] Define linux-yocto-tiny configs for all supported BSPs
23# [ ] Drop ldconfig from the installation
24# [ ] Modify the runqemu scripts to work with ext2 parameter:
25# runqemu qemux86 qemuparams="-nographic" bootparams="console=ttyS0,115200 root=0800"
26# [ ] Modify busybox to allow for DISTRO_FEATURES-like confiruration
27
28require conf/distro/poky.conf
29DISTRO = "poky-tiny"
30
31# FIXME: consider adding a new "tiny" feature
32#DISTRO_FEATURES_append = " tiny"
33
34# Distro config is evaluated after the machine config, so we have to explicitly
35# set the kernel provider to override a machine config.
36PREFERRED_PROVIDER_virtual/kernel = "linux-yocto-tiny"
37PREFERRED_VERSION_linux-yocto-tiny = "3.0%"
38
39# We can use task-core-boot, but in the future we may need a new task-core-tiny
40#POKY_DEFAULT_EXTRA_RDEPENDS += "task-core-boot"
41# Drop kernel-module-af-packet from RRECOMMENDS
42POKY_DEFAULT_EXTRA_RRECOMMENDS = ""
43
44# FIXME: what should we do with this?
45TCLIBCAPPEND = ""
46
47# Disable wide char support for ncurses as we don't include it in
48# in the LIBC features below.
49ENABLE_WIDEC="false"
50
51# Reconfigure eglibc for a smaller installation
52# Comment out any of the lines below to disable them in the build
53DISTRO_FEATURES_LIBC_TINY = "libc-libm libc-crypt"
54# Required for "who"
55DISTRO_FEATURES_LIBC_MINIMAL = "libc-utmp libc-getlogin"
56DISTRO_FEATURES_LIBC_REGEX = "libc-posix-regexp"
57DISTRO_FEATURES_LIBC_NET = "libc-inet libc-nis"
58
59DISTRO_FEATURES_LIBC = "${DISTRO_FEATURES_LIBC_TINY} \
60 ${DISTRO_FEATURES_LIBC_MINIMAL} \
61 ${DISTRO_FEATURES_LIBC_REGEX} \
62 ${DISTRO_FEATURES_LIBC_NET} \
63 "
64
65# Comment out any of the lines below to disable them in the build
66# DISTRO_FEATURES options:
67# alsa bluetooth ext2 irda pcmcia usbgadget usbhost wifi nfs zeroconf pci
68DISTRO_FEATURES_TINY = "pci"
69DISTRO_FEATURES_NET = "ipv4"
70DISTRO_FEATURES_USB = "usbhost"
71#DISTRO_FEATURES_USBGADGET = "usbgadget"
72#DISTRO_FEATURES_WIFI = "wifi"
73
74DISTRO_FEATURES = "${DISTRO_FEATURES_TINY} \
75 ${DISTRO_FEATURES_NET} \
76 ${DISTRO_FEATURES_USB} \
77 ${DISTRO_FEATURES_USBGADGET} \
78 ${DISTRO_FEATURES_WIFI} \
79 ${DISTRO_FEATURES_LIBC} \
80 "
81
82# Use tmpdevfs and the busybox runtime services
83VIRTUAL-RUNTIME_dev_manager = ""
84VIRTUAL-RUNTIME_login_manager = ""
85VIRTUAL-RUNTIME_init_manager = ""
86VIRTUAL-RUNTIME_keymaps = ""
87
88# FIXME: Consider adding "modules" to MACHINE_FEATURES and using that in
89# task-core-base to select modutils-initscripts or not. Similar with "net" and
90# netbase.
91
92# By default we only support ext2 and initramfs. We don't build live as that
93# pulls in a lot of dependencies for the live image and the installer, like
94# udev, grub, etc. These pull in gettext, which fails to build with wide
95# character support.
96IMAGE_FSTYPES = "ext2 cpio.gz"
97
98# Drop v86d from qemu dependency list (we support serial)
99# Drop grub from meta-intel BSPs
100# FIXME: A different mechanism is needed here. We could define -tiny
101# variants of all compatible machines, but that leads to a lot
102# more machine configs to maintain long term.
103MACHINE_ESSENTIAL_EXTRA_RDEPENDS = ""