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Peter Korsgaard 451a887894 Makefile: use /etc/os-release for version info rather than /etc/br-version
/etc/os-release is becoming a standard interface for distribution
name/version info, so let's use that instead of the nonstandard
/etc/br-version. Format of the file is something like:

NAME=Buildroot
VERSION=2012.02-rc1-00003-g2d10e81
ID=buildroot
VERSION_ID=2012.02-rc1
PRETTY_NAME="Buildroot 2012.02-rc1"

For more details, see:

http://0pointer.de/public/systemd-man/os-release.html

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
2012-02-14 13:08:23 +01:00
board
boot barebox: add 2012.02, remove 2011.11 2012-02-06 23:25:10 +01:00
configs
docs Update for 2012.02-rc1 2012-02-12 23:22:29 +01:00
fs Introduce /run directory 2012-02-02 23:03:13 +01:00
linux linux: drop LZMA environment variable 2012-02-10 10:44:47 +01:00
package DOWNLOAD_WGET: use -O instead of -P to set output file 2012-02-14 12:07:27 +01:00
support dependencies: build a host-tar if no suitable tar can be found 2012-02-09 22:59:21 +01:00
target udev: bump to 181 and other fixes 2012-02-08 21:56:47 +01:00
toolchain dependencies: move from toolchain/ to support/ 2012-02-09 21:45:59 +01:00
.defconfig
.gitignore
CHANGES Update for 2012.02-rc1 2012-02-12 23:22:29 +01:00
Config.in
COPYING
Makefile Makefile: use /etc/os-release for version info rather than /etc/br-version 2012-02-14 13:08:23 +01:00

To build and use the buildroot stuff, do the following:

1) run 'make menuconfig'
2) select the packages you wish to compile
3) run 'make'
4) wait while it compiles
5) Use your shiny new root filesystem. Depending on which sort of
    root filesystem you selected, you may want to loop mount it,
    chroot into it, nfs mount it on your target device, burn it
    to flash, or whatever is appropriate for your target system.

You do not need to be root to build or run buildroot.  Have fun!

Offline build:
==============

In order to do an offline-build (not connected to the net), fetch all
selected source by issuing a
$ make source

before you disconnect.
If your build-host is never connected, then you have to copy buildroot
and your toplevel .config to a machine that has an internet-connection
and issue "make source" there, then copy the content of your dl/ dir to
the build-host.

Building out-of-tree:
=====================

Buildroot supports building out of tree with a syntax similar
to the Linux kernel. To use it, add O=<directory> to the
make command line, E.G.:

$ make O=/tmp/build

And all the output files (including .config) will be located under /tmp/build.

More finegrained configuration:
===============================

You can specify a config-file for uClibc:
$ make UCLIBC_CONFIG_FILE=/my/uClibc.config

And you can specify a config-file for busybox:
$ make BUSYBOX_CONFIG_FILE=/my/busybox.config

To use a non-standard host-compiler (if you do not have 'gcc'),
make sure that the compiler is in your PATH and that the library paths are
setup properly, if your compiler is built dynamically:
$ make HOSTCC=gcc-4.3.orig HOSTCXX=gcc-4.3-mine

Depending on your configuration, there are some targets you can use to
use menuconfig of certain packages. This includes:
$ make HOSTCC=gcc-4.3 linux-menuconfig
$ make HOSTCC=gcc-4.3 uclibc-menuconfig
$ make HOSTCC=gcc-4.3 busybox-menuconfig

Please feed suggestions, bug reports, insults, and bribes back to the
buildroot mailing list: buildroot@uclibc.org