[yocto] [PATCH 2/3] distro: Add poky-tiny distro definition

[Khem Raj]

On Wed, Dec 28, 2011 at 3:45 PM, Darren Hart <dvhart at linux.intel.com> wrote:
> Poky-tiny is intended for building very small OS images. The distro
> definition sets the providers for the kernel and the runtime services.
> It also reduces the eglibc component list and other DISTRO_FEATURE
> elements.
>
> Signed-off-by: Darren Hart <dvhart at linux.intel.com>
> ---
>  meta-yocto/conf/distro/poky-tiny.conf |  103 +++++++++++++++++++++++++++++++++
>  1 files changed, 103 insertions(+), 0 deletions(-)
>  create mode 100644 meta-yocto/conf/distro/poky-tiny.conf
>
> diff --git a/meta-yocto/conf/distro/poky-tiny.conf b/meta-yocto/conf/distro/poky-tiny.conf
> new file mode 100644
> index 0000000..49c4397
> --- /dev/null
> +++ b/meta-yocto/conf/distro/poky-tiny.conf
> @@ -0,0 +1,103 @@
> +# Distribution definition for: poky-tiny
> +#
> +# Copyright (c) 2011, Intel Corporation.
> +# All rights reserved.
> +#

should this be MIT licensed ?
or do u plan to keep it closed.

> +# Poky-tiny is intended to define a tiny Linux system comprised of a
> +# Linux kernel tailored to support each specific MACHINE and busybox.
> +# Poky-tiny sets some basic policy to ensure a usable system while still
> +# keeping the rootfs and kernel image as small as possible.
> +#
> +# The policies defined are intended to meet the following goals:
> +# o Serial consoles only (no framebuffer or VGA console)
> +# o Basic support for IPV4 networking
> +# o Single user ash shell
> +# o Static images (no support for adding packages or libraries later)
> +# o Read-only or RAMFS root filesystem
> +# o Combined Linux kernel + rootfs in under 4MB
> +# o Allow the user to select between eglibc or uclibc with the TCLIBC variable
> +#
> +# This is currently a partial definition, the following tasks remain:
> +# [ ] Integrate linux-yocto-tiny ktype into linux-yocto
> +# [ ] Define linux-yocto-tiny configs for all supported BSPs
> +# [ ] Drop ldconfig from the installation
> +# [ ] Modify the runqemu scripts to work with ext2 parameter:
> +#     runqemu qemux86 qemuparams="-nographic" bootparams="console=ttyS0,115200 root=0800"
> +# [ ] Modify busybox to allow for DISTRO_FEATURES-like confiruration
> +
> +require conf/distro/poky.conf
> +DISTRO = "poky-tiny"
> +
> +# FIXME: consider adding a new "tiny" feature
> +#DISTRO_FEATURES_append = " tiny"
> +
> +# Distro config is evaluated after the machine config, so we have to explicitly
> +# set the kernel provider to override a machine config.
> +PREFERRED_PROVIDER_virtual/kernel = "linux-yocto-tiny"
> +PREFERRED_VERSION_linux-yocto-tiny = "3.0%"
> +
> +# We can use task-core-boot, but in the future we may need a new task-core-tiny
> +#POKY_DEFAULT_EXTRA_RDEPENDS += "task-core-boot"
> +# Drop kernel-module-af-packet from RRECOMMENDS
> +POKY_DEFAULT_EXTRA_RRECOMMENDS = ""
> +
> +# FIXME: what should we do with this?
> +TCLIBCAPPEND = ""
> +
> +# Disable wide char support for ncurses as we don't include it in
> +# in the LIBC features below.
> +ENABLE_WIDEC="false"
> +
> +# Reconfigure eglibc for a smaller installation
> +# Comment out any of the lines below to disable them in the build
> +DISTRO_FEATURES_LIBC_TINY = "libc-libm libc-crypt"
> +# Required for "who"
> +DISTRO_FEATURES_LIBC_MINIMAL = "libc-utmp libc-getlogin"
> +DISTRO_FEATURES_LIBC_REGEX = "libc-posix-regexp"
> +DISTRO_FEATURES_LIBC_NET = "libc-inet libc-nis"
> +
> +DISTRO_FEATURES_LIBC = "${DISTRO_FEATURES_LIBC_TINY} \
> +                        ${DISTRO_FEATURES_LIBC_MINIMAL} \
> +                        ${DISTRO_FEATURES_LIBC_REGEX} \
> +                        ${DISTRO_FEATURES_LIBC_NET} \
> +                       "
> +
> +# Comment out any of the lines below to disable them in the build
> +# DISTRO_FEATURES options:
> +# alsa bluetooth ext2 irda pcmcia usbgadget usbhost wifi nfs zeroconf pci
> +DISTRO_FEATURES_TINY = "pci"
> +DISTRO_FEATURES_NET = "ipv4"
> +DISTRO_FEATURES_USB = "usbhost"
> +#DISTRO_FEATURES_USBGADGET = "usbgadget"
> +#DISTRO_FEATURES_WIFI = "wifi"
> +
> +DISTRO_FEATURES = "${DISTRO_FEATURES_TINY} \
> +                   ${DISTRO_FEATURES_NET} \
> +                   ${DISTRO_FEATURES_USB} \
> +                   ${DISTRO_FEATURES_USBGADGET} \
> +                   ${DISTRO_FEATURES_WIFI} \
> +                   ${DISTRO_FEATURES_LIBC} \
> +                  "
> +
> +# Use tmpdevfs and the busybox runtime services
> +VIRTUAL-RUNTIME_dev_manager = ""
> +VIRTUAL-RUNTIME_login_manager = ""
> +VIRTUAL-RUNTIME_init_manager = ""
> +VIRTUAL-RUNTIME_keymaps = ""
> +
> +# FIXME: Consider adding "modules" to MACHINE_FEATURES and using that in
> +# task-core-base to select modutils-initscripts or not.  Similar with "net" and
> +# netbase.
> +
> +# By default we only support ext2 and initramfs. We don't build live as that
> +# pulls in a lot of dependencies for the live image and the installer, like
> +# udev, grub, etc.  These pull in gettext, which fails to build with wide
> +# character support.
> +IMAGE_FSTYPES = "ext2 cpio.gz"
> +
> +# Drop v86d from qemu dependency list (we support serial)
> +# Drop grub from meta-intel BSPs
> +# FIXME: A different mechanism is needed here. We could define -tiny
> +#        variants of all compatible machines, but that leads to a lot
> +#        more machine configs to maintain long term.
> +MACHINE_ESSENTIAL_EXTRA_RDEPENDS = ""
> --
> 1.7.6.4
>