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Yann E. MORIN 12c5e68ea8 support/graph-depends: add option to limit the depth of the graph
Currently, the complete dependency chain of a package is used to
generate the dependency graph. When this dependency chain is long,
the generated graph becomes almost unreadable.

However, it is often sufficient to get the first few levels of
dependency of a package.

Add a new variable BR2_GRAPH_DEPTH, that the user can set to limit
the depth of the dependency list.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2014-04-14 20:56:20 +02:00
arch Disable o32 ABI for MIPS64 architectures 2014-03-28 12:51:46 +01:00
board board/arm/foundation-v8: update defconfig and instructions 2014-03-21 07:27:12 +01:00
boot barebox: bump to version 2014.04.0 2014-04-11 21:10:37 +02:00
configs configs: bump raspberrypi_defconfig to use the latest stable kernel 2014-04-14 20:54:49 +02:00
docs manual: add notes about depending on a virtual package 2014-04-05 19:21:02 +02:00
fs Don't build host-xz needlessly 2014-04-07 21:38:28 +02:00
linux linux: bump to version 3.14 2014-04-01 14:44:36 +02:00
package support/graph-depends: add option to limit the depth of the graph 2014-04-14 20:56:20 +02:00
support support/graph-depends: add option to limit the depth of the graph 2014-04-14 20:56:20 +02:00
system system: allow setting the local timezone for uClibc 2014-04-09 00:33:32 +02:00
toolchain ext-toolchain-wrapper: fix typo 2014-04-10 22:24:30 +02:00
.defconfig buildroot: get rid of s390 support 2009-01-12 14:36:14 +00:00
.gitignore update gitignore 2013-05-04 12:41:55 +02:00
CHANGES Disable o32 ABI for MIPS64 architectures 2014-03-28 12:51:46 +01:00
Config.in uboot: mark custom network settings as deprecated 2014-03-18 09:04:31 +01:00
Config.in.legacy system: make the zoneinfo list a system option 2014-04-08 23:33:24 +02:00
COPYING clarify license and fix website license link 2009-05-08 09:29:41 +02:00
Makefile support/graph-depends: add option to limit the depth of the graph 2014-04-14 20:56:20 +02:00
Makefile.legacy Makefile.legacy: fix recursive invocation with BUILDROOT_DL_DIR and _CONFIG 2014-02-11 08:14:57 +01:00
README docs: Move README file to root 2014-03-03 21:28:39 +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

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