<s>
Qbs	B-Language
(	O
pronounced	O
Cubes	O
)	O
is	O
a	O
cross-platform	B-Operating_System
free	B-License
and	I-License
open-source	I-License
software	I-License
for	O
managing	B-Application
the	I-Application
build	I-Application
process	I-Application
of	I-Application
software	I-Application
.	O
</s>
<s>
It	O
was	O
designed	O
to	O
support	O
large	O
,	O
complex	O
projects	O
,	O
written	O
in	O
any	O
number	O
of	O
programming	O
languages	O
,	O
primarily	O
C/C	O
++	O
.	O
</s>
<s>
Qbs	B-Language
is	O
an	O
all-in-one	O
tool	O
that	O
generates	O
a	O
build	O
graph	O
from	O
a	O
high-level	O
project	O
description	O
(	O
like	O
its	O
predecessor	O
qmake	B-Language
)	O
,	O
and	O
additionally	O
undertakes	O
the	O
task	O
of	O
executing	O
the	O
commands	O
in	O
the	O
low-level	O
build	O
graph	O
(	O
like	O
make	B-Application
)	O
.	O
</s>
<s>
Qbs	B-Language
was	O
originally	O
created	O
by	O
Nokia	O
,	O
then	O
The	O
Qt	B-Language
Company	O
,	O
who	O
distributes	O
it	O
along	O
with	O
their	O
Qt	B-Language
toolkit	I-Language
.	O
</s>
<s>
It	O
integrates	O
with	O
the	O
Qt	B-Language
framework	I-Language
,	O
and	O
automates	O
the	O
creation	O
of	O
moc	O
(	O
meta	O
object	O
compiler	O
)	O
and	O
rcc	O
(	O
resource	O
compiler	O
)	O
sources	O
,	O
which	O
are	O
used	O
in	O
Qt	B-Language
's	O
meta-object	O
system	O
and	O
in	O
the	O
integration	O
of	O
binary	O
resources	O
(	O
e.g.	O
</s>
<s>
It	O
has	O
been	O
deprecated	O
by	O
Qt	B-Language
Group	O
in	O
2018	O
to	O
redirect	O
the	O
resources	O
to	O
CMake	B-Language
instead	O
.	O
</s>
<s>
Qbs	B-Language
is	O
unique	O
in	O
that	O
it	O
has	O
no	O
mechanism	O
for	O
in-source	O
builds	O
,	O
guaranteeing	O
the	O
ability	O
to	O
create	O
several	O
builds	O
from	O
a	O
single	O
source	O
tree	O
,	O
including	O
building	O
them	O
from	O
a	O
single	O
command	O
invocation	O
and	O
in	O
parallel	O
.	O
</s>
<s>
Qbs	B-Language
has	O
no	O
built-in	O
support	O
for	O
any	O
particular	O
programming	O
language	O
,	O
toolkit	O
,	O
or	O
library	O
.	O
</s>
<s>
This	O
is	O
again	O
in	O
contrast	O
to	O
qmake	B-Language
,	O
which	O
hardcodes	O
support	O
for	O
many	O
Qt-related	O
tools	O
and	O
workflows	O
.	O
</s>
<s>
Instead	O
,	O
Qbs	B-Language
is	O
provided	O
with	O
a	O
set	O
of	O
modules	O
written	O
in	O
a	O
QML	B-Language
dialect	O
and	O
JavaScript	B-Language
that	O
enable	O
support	O
for	O
a	O
variety	O
of	O
programming	O
languages	O
and	O
tools	O
.	O
</s>
<s>
Qbs	B-Language
currently	O
provides	O
modules	O
supporting	O
the	O
Android	B-Application
SDK	I-Application
and	O
NDK	B-Application
,	O
C	B-Language
,	O
C++	B-Language
,	O
Java	B-Language
,	O
NSIS	B-Language
,	O
TypeScript	B-Language
,	O
WiX	B-Language
,	O
Xcode	B-Operating_System
,	O
and	O
a	O
variety	O
of	O
other	O
tools	O
.	O
</s>
<s>
Qbs	B-Language
can	O
build	O
projects	O
for	O
many	O
platforms	O
including	O
Android	B-Application
,	O
FreeBSD	B-Operating_System
,	O
iOS	B-Application
,	O
Linux	B-Application
,	O
macOS	B-Application
,	O
QNX	B-Operating_System
,	O
tvOS	B-Operating_System
,	O
watchOS	B-Device
,	O
and	O
Windows	O
,	O
with	O
support	O
for	O
Universal	B-Device
Windows	I-Device
Platform	I-Device
applications	O
,	O
INTEGRITY	B-Operating_System
,	O
VxWorks	B-Operating_System
,	O
and	O
other	O
platforms	O
under	O
development	O
.	O
</s>
<s>
Qt	B-Language
Creator	I-Language
provides	O
built-in	O
Qbs	B-Language
support	O
,	O
and	O
IDE	O
integration	O
for	O
Visual	B-Application
Studio	I-Application
is	O
provided	O
by	O
the	O
generators	O
feature	O
.	O
</s>
<s>
Support	O
for	O
Xcode	B-Operating_System
is	O
currently	O
under	O
development	O
.	O
</s>
<s>
The	O
build	O
process	O
in	O
Qbs	B-Language
takes	O
place	O
in	O
two	O
stages	O
.	O
</s>
<s>
Each	O
build	O
project	O
contains	O
a	O
single	O
build	O
graph	O
( *	O
.bg	O
)	O
file	O
in	O
the	O
directory	O
where	O
Qbs	B-Language
stores	O
the	O
serialized	O
representation	O
of	O
its	O
internal	O
build	O
graph	O
format	O
.	O
</s>
<s>
Deserializing	O
this	O
file	O
and	O
utilizing	O
the	O
cached	O
information	O
allows	O
Qbs	B-Language
to	O
very	O
quickly	O
resolve	O
the	O
project	O
,	O
leading	O
to	O
near-instant	O
incremental	O
builds	O
.	O
</s>
<s>
In	O
contrast	O
to	O
make	B-Application
,	O
Qbs	B-Language
does	O
not	O
rely	O
on	O
timestamps	O
of	O
files	O
in	O
the	O
build	O
directory	O
,	O
and	O
tampering	O
with	O
its	O
contents	O
will	O
not	O
lead	O
to	O
targets	O
being	O
rebuilt	O
unless	O
the	O
--check-outputs	O
option	O
is	O
used	O
.	O
</s>
<s>
Qbs	B-Language
development	O
began	O
at	O
Nokia	O
in	O
the	O
year	O
2010	O
in	O
response	O
to	O
the	O
need	O
for	O
a	O
replacement	O
for	O
qmake	B-Language
.	O
</s>
<s>
Qbs	B-Language
 '	O
design	O
aims	O
to	O
provide	O
a	O
much	O
lower	O
learning	O
curve	O
,	O
better	O
integration	O
with	O
IDEs	O
,	O
and	O
a	O
stable	O
and	O
powerful	O
language	O
with	O
predictable	O
behavior	O
.	O
</s>
<s>
Qbs	B-Language
1.0	O
was	O
released	O
in	O
2013	O
and	O
further	O
developed	O
by	O
the	O
Qt	B-Language
Company	O
beginning	O
around	O
that	O
time	O
under	O
the	O
governance	O
model	O
of	O
the	O
Qt	B-Language
Project	I-Language
.	O
</s>
<s>
The	O
developers	O
hoped	O
to	O
eventually	O
push	O
for	O
Qbs	B-Language
to	O
replace	O
qmake	B-Language
as	O
Qt	B-Language
's	O
own	O
build	B-Application
system	I-Application
.	O
</s>
<s>
However	O
,	O
in	O
October	O
2018	O
it	O
was	O
deprecated	O
in	O
favor	O
of	O
qmake	B-Language
and/or	O
cmake	B-Language
.	O
</s>
<s>
In	O
an	O
August	O
7	O
,	O
2019	O
blog	O
post	O
,	O
the	O
Qt	B-Language
Company	O
stated	O
that	O
starting	O
with	O
Qt	B-Language
6	O
,	O
cmake	B-Language
will	O
become	O
Qt	B-Language
's	O
standard	O
build	B-Application
system	I-Application
and	O
cited	O
cmake	B-Language
's	O
extreme	O
popularity	O
as	O
a	O
factor	O
.	O
</s>
<s>
Qbs	B-Language
development	O
was	O
taken	O
over	O
by	O
external	O
volunteers	O
,	O
who	O
as	O
of	O
June	O
2020	O
are	O
still	O
actively	O
maintaining	O
it	O
under	O
the	O
Qt	B-Language
Project	I-Language
umbrella	O
.	O
</s>
<s>
Although	O
the	O
Qt	B-Language
Company	O
announced	O
that	O
they	O
would	O
stop	O
further	O
development	O
on	O
Qbs	B-Language
,	O
they	O
committed	O
to	O
provide	O
the	O
necessary	O
infrastructure	O
for	O
future	O
releases	O
of	O
Qbs	B-Language
by	O
the	O
community	O
.	O
</s>
