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Thomas Petazzoni e1f0804cc1 external-toolchain: add support for recent Linaro toolchains
Starting from 2012.03, the Linaro toolchains have separated the GCC
support libraries (libstdc++, libgcc_s) from the sysroot itself. So we
no longer have the case where all libraries are inside the sysroot, as
we had for all the previously supported toolchains.

Therefore, we add some logic to detect if such a separate directory is
used for GCC support libraries, and if it's the case, we make sure
that we take into account this directory when creating our own
sysroot, and when copying libraries to the target filesystem.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2012-05-07 17:08:37 +02:00
board qemu/microblazebe-mmu: add new sample config 2012-04-04 22:49:12 +02:00
boot uboot: add a new binary format for u-boot.img 2012-05-05 23:50:24 +02:00
configs configs: add support for PandaBoard and PandaBoard ES 2012-05-05 23:51:34 +02:00
docs docs/git.html: slightly reword for git 2012-04-25 23:07:27 +02:00
fs Add the www-data user group to the skeleton target filesystem 2012-04-26 15:22:15 +02:00
linux ocf-linux: new package 2012-05-05 16:21:40 +02:00
package dnsmasq: bump to version 2.61 and enhance 2012-05-06 23:18:17 +02:00
support kconfig: do not use HOST_LOADLIBES anymore 2012-04-19 16:04:21 +02:00
target buildroot: fix BR2_GCC_TARGET_ABI for MIPS n64 2012-05-03 21:00:27 +02:00
toolchain external-toolchain: add support for recent Linaro toolchains 2012-05-07 17:08:37 +02:00
.defconfig buildroot: get rid of s390 support 2009-01-12 14:36:14 +00:00
.gitignore .gitignore: ignore more patch related files 2010-11-18 12:07:23 +01:00
CHANGES CHANGES: GDB 4.7.1, not GCC 2012-05-03 23:29:08 +02:00
Config.in config: improve help text and prompt for debugging related options 2012-03-15 23:14:36 +01:00
COPYING clarify license and fix website license link 2009-05-08 09:29:41 +02:00
Makefile config: make it possible to specify which config file to use for 'make defconfig' 2012-05-05 23:38:53 +02:00

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