<s>
Buildroot	B-Application
is	O
a	O
set	O
of	O
Makefiles	O
and	O
patches	B-Application
that	O
simplifies	O
and	O
automates	O
the	O
process	O
of	O
building	O
a	O
complete	O
and	O
bootable	O
Linux	B-Operating_System
environment	O
for	O
an	O
embedded	B-Architecture
system	I-Architecture
,	O
while	O
using	O
cross-compilation	B-Application
to	O
allow	O
building	O
for	O
multiple	O
target	O
platforms	O
on	O
a	O
single	O
Linux-based	O
development	O
system	O
.	O
</s>
<s>
Buildroot	B-Application
can	O
automatically	O
build	O
the	O
required	O
cross-compilation	B-Application
toolchain	B-General_Concept
,	O
create	O
a	O
root	B-Application
file	I-Application
system	I-Application
,	O
compile	O
a	O
Linux	B-Operating_System
kernel	I-Operating_System
image	O
,	O
and	O
generate	O
a	O
boot	B-Application
loader	I-Application
for	O
the	O
targeted	O
embedded	B-Architecture
system	I-Architecture
,	O
or	O
it	O
can	O
perform	O
any	O
independent	O
combination	O
of	O
these	O
steps	O
.	O
</s>
<s>
For	O
example	O
,	O
an	O
already	O
installed	O
cross-compilation	B-Application
toolchain	B-General_Concept
can	O
be	O
used	O
independently	O
,	O
while	O
Buildroot	B-Application
only	O
creates	O
the	O
root	B-Application
file	I-Application
system	I-Application
.	O
</s>
<s>
Buildroot	B-Application
is	O
primarily	O
intended	O
to	O
be	O
used	O
with	O
small	O
or	O
embedded	B-Architecture
systems	I-Architecture
based	O
on	O
various	O
computer	B-General_Concept
architectures	I-General_Concept
and	O
instruction	B-General_Concept
set	I-General_Concept
architectures	I-General_Concept
(	O
ISAs	O
)	O
,	O
including	O
x86	B-Operating_System
,	O
ARM	B-Architecture
,	O
MIPS	B-Device
and	O
PowerPC	B-Architecture
.	O
</s>
<s>
Numerous	O
architectures	O
and	O
their	O
variants	O
are	O
supported	O
;	O
Buildroot	B-Application
also	O
comes	O
with	O
default	O
configurations	O
for	O
several	O
off-the-shelf	O
available	O
embedded	O
boards	O
,	O
such	O
as	O
Cubieboard	B-Device
,	O
Raspberry	O
Pi	O
and	O
SheevaPlug	B-Application
.	O
</s>
<s>
Several	O
third-party	O
projects	O
and	O
products	O
use	O
Buildroot	B-Application
as	O
the	O
basis	O
for	O
their	O
build	B-Application
systems	I-Application
,	O
including	O
the	O
OpenWrt	B-Application
project	O
that	O
creates	O
an	O
embedded	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
,	O
and	O
firmware	B-Application
for	O
the	O
customer-premises	O
equipment	O
(	O
CPE	O
)	O
used	O
by	O
the	O
Google	B-Application
Fiber	I-Application
broadband	O
service	O
.	O
</s>
<s>
Multiple	O
C	B-Language
standard	I-Language
libraries	I-Language
are	O
supported	O
as	O
part	O
of	O
the	O
toolchain	B-General_Concept
,	O
including	O
the	O
GNU	B-Language
C	I-Language
Library	I-Language
,	O
uClibc	B-Language
and	O
musl	B-Language
,	O
as	O
well	O
as	O
the	B-Language
C	I-Language
standard	I-Language
libraries	I-Language
that	O
belong	O
to	O
various	O
preconfigured	O
development	O
environments	O
,	O
such	O
as	O
those	O
provided	O
by	O
Linaro	O
.	O
</s>
<s>
Buildroot	B-Application
's	O
build	O
configuration	O
system	O
internally	O
uses	O
Kconfig	B-Application
,	O
which	O
provides	O
features	O
such	O
as	O
a	O
menu-driven	O
interface	O
,	O
handling	O
of	O
dependencies	B-Application
,	O
and	O
contextual	B-Protocol
help	I-Protocol
;	O
Kconfig	B-Application
is	O
also	O
used	O
by	O
the	O
Linux	B-Operating_System
kernel	I-Operating_System
for	O
its	O
source-level	O
configuration	O
.	O
</s>
<s>
Buildroot	B-Application
is	O
organized	O
around	O
numerous	O
automatically	O
downloaded	O
packages	B-Application
,	O
which	O
contain	O
the	O
source	O
code	O
of	O
various	O
userspace	B-Operating_System
applications	O
,	O
system	O
utilities	O
,	O
and	O
libraries	B-Library
.	O
</s>
<s>
Root	B-Application
file	I-Application
system	I-Application
images	O
,	O
which	O
are	O
the	O
final	O
results	O
,	O
may	O
be	O
built	O
using	O
various	O
file	B-Application
systems	I-Application
,	O
including	O
cramfs	B-Application
,	O
JFFS2	B-Application
,	O
romfs	B-Application
,	O
SquashFS	B-Application
and	O
UBIFS	B-Application
.	O
</s>
<s>
Buildroot	B-Application
is	O
free	B-License
and	I-License
open-source	I-License
software	I-License
,	O
maintained	O
by	O
Peter	O
Korsgaard	O
and	O
licensed	O
under	O
version2	O
or	O
later	O
of	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
(	O
GPL	B-License
)	O
.	O
</s>
<s>
The	O
project	O
started	O
in	O
2001	O
,	O
with	O
initial	O
intentions	O
to	O
serve	O
as	O
a	O
testbed	O
for	O
uClibc	B-Language
.	O
</s>
