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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"
33
34# FIXME: consider adding a new "tiny" feature
35#DISTRO_FEATURES_append = " tiny"
36
37# Distro config is evaluated after the machine config, so we have to explicitly
38# set the kernel provider to override a machine config.
39PREFERRED_PROVIDER_virtual/kernel = "linux-yocto-tiny"
40PREFERRED_VERSION_linux-yocto-tiny = "3.8%"
41
42# We can use packagegroup-core-boot, but in the future we may need a new packagegroup-core-tiny
43#POKY_DEFAULT_EXTRA_RDEPENDS += "packagegroup-core-boot"
44# Drop kernel-module-af-packet from RRECOMMENDS
45POKY_DEFAULT_EXTRA_RRECOMMENDS = ""
46
47# FIXME: what should we do with this?
48TCLIBCAPPEND = ""
49
50# Disable wide char support for ncurses as we don't include it in
51# in the LIBC features below.
52ENABLE_WIDEC="false"
53
54# Drop native language support. This removes the
55# eglibc->bash->gettext->libc-posix-clang-wchar dependency.
56USE_NLS="no"
57
58# Reconfigure eglibc for a smaller installation
59# Comment out any of the lines below to disable them in the build
60DISTRO_FEATURES_LIBC_TINY = "libc-libm libc-crypt"
61DISTRO_FEATURES_LIBC_TINY_append_x86-64 = " libc-libm-big"
62
63# Required for "who"
64DISTRO_FEATURES_LIBC_MINIMAL = "libc-utmp libc-getlogin"
65DISTRO_FEATURES_LIBC_REGEX = "libc-posix-regexp"
66DISTRO_FEATURES_LIBC_NET = "libc-inet libc-nis"
67
68DISTRO_FEATURES_LIBC = "${DISTRO_FEATURES_LIBC_TINY} \
69 ${DISTRO_FEATURES_LIBC_MINIMAL} \
70 ${DISTRO_FEATURES_LIBC_REGEX} \
71 ${DISTRO_FEATURES_LIBC_NET} \
72 "
73
74# Comment out any of the lines below to disable them in the build
75# DISTRO_FEATURES options:
76# alsa bluetooth ext2 irda pcmcia usbgadget usbhost wifi nfs zeroconf pci
77DISTRO_FEATURES_TINY = "pci"
78DISTRO_FEATURES_NET = "ipv4"
79DISTRO_FEATURES_USB = "usbhost"
80#DISTRO_FEATURES_USBGADGET = "usbgadget"
81#DISTRO_FEATURES_WIFI = "wifi"
82
83DISTRO_FEATURES = "${DISTRO_FEATURES_TINY} \
84 ${DISTRO_FEATURES_NET} \
85 ${DISTRO_FEATURES_USB} \
86 ${DISTRO_FEATURES_USBGADGET} \
87 ${DISTRO_FEATURES_WIFI} \
88 ${DISTRO_FEATURES_LIBC} \
89 "
90
91# Enable LFS - see bug YOCTO #5865
92DISTRO_FEATURES_append_libc-uclibc = " largefile"
93
94# Use tmpdevfs and the busybox runtime services
95VIRTUAL-RUNTIME_dev_manager = ""
96VIRTUAL-RUNTIME_login_manager = ""
97VIRTUAL-RUNTIME_init_manager = "tiny-init"
98VIRTUAL-RUNTIME_keymaps = ""
99
100# FIXME: Consider adding "modules" to MACHINE_FEATURES and using that in
101# packagegroup-core-base to select modutils-initscripts or not. Similar with "net" and
102# netbase.
103
104# By default we only support ext2 and initramfs. We don't build live as that
105# pulls in a lot of dependencies for the live image and the installer, like
106# udev, grub, etc. These pull in gettext, which fails to build with wide
107# character support.
108IMAGE_FSTYPES = "ext2 cpio.gz"
109
110# Drop v86d from qemu dependency list (we support serial)
111# Drop grub from meta-intel BSPs
112# FIXME: A different mechanism is needed here. We could define -tiny
113# variants of all compatible machines, but that leads to a lot
114# more machine configs to maintain long term.
115MACHINE_ESSENTIAL_EXTRA_RDEPENDS = ""
116
117# The mtrace script included by eglibc is a perl script. This means the system
118# will build perl in case this package is installed. Since we don't care about
119# this script for the purposes of tiny, remove the dependency from here.
120RDEPENDS_${PN}-mtrace_pn-eglibc = ""
121
122INHERIT += "blacklist"
123PNBLACKLIST[build-appliance-image] = "not buildable with poky-tiny"
124PNBLACKLIST[core-image-base] = "not buildable with poky-tiny"
125PNBLACKLIST[core-image-clutter] = "not buildable with poky-tiny"
126PNBLACKLIST[core-image-directfb] = "not buildable with poky-tiny"
127PNBLACKLIST[core-image-full-cmdline] = "not buildable with poky-tiny"
128PNBLACKLIST[core-image-lsb] = "not buildable with poky-tiny"
129PNBLACKLIST[core-image-lsb-dev] = "not buildable with poky-tiny"
130PNBLACKLIST[core-image-lsb-sdk] = "not buildable with poky-tiny"
131PNBLACKLIST[core-image-rt] = "not buildable with poky-tiny"
132PNBLACKLIST[core-image-rt-sdk] = "not buildable with poky-tiny"
133PNBLACKLIST[core-image-sato] = "not buildable with poky-tiny"
134PNBLACKLIST[core-image-sato-dev] = "not buildable with poky-tiny"
135PNBLACKLIST[core-image-sato-sdk] = "not buildable with poky-tiny"
136PNBLACKLIST[core-image-x11] = "not buildable with poky-tiny"
137PNBLACKLIST[qt4e-demo-image] = "not buildable with poky-tiny"
138PNBLACKLIST[core-image-weston] = "not buildable with poky-tiny"
139
140# Disable python usage in opkg-utils since it won't build with tiny config
141PACKAGECONFIG_pn-opkg-utils = ""