<s>
XL	O
C/C	O
++	O
is	O
the	O
name	O
of	O
IBM	O
's	O
proprietary	B-Application
optimizing	O
C/C	O
++	O
compilers	O
for	O
IBM-supported	O
environments	O
.	O
</s>
<s>
The	O
IBM	O
XL	O
compilers	O
are	O
built	O
from	O
modularized	O
components	O
consisting	O
of	O
front	O
ends	O
(	O
for	O
different	O
programming	O
languages	O
)	O
,	O
a	O
platform-agnostic	B-Operating_System
high-level	O
optimizer	O
,	O
and	O
platform-specific	O
low-level	O
optimizers/code	O
generators	O
to	O
target	O
specific	O
hardware	O
and	O
operating	O
systems	O
.	O
</s>
<s>
The	O
XL	O
C/C	O
++	O
compilers	O
target	O
POWER	O
,	O
BlueGene/Q	O
,	O
and	O
IBM	B-Device
Z	I-Device
hardware	O
architectures	O
.	O
</s>
<s>
A	O
common	O
high	O
level	O
optimizer	O
across	O
the	O
POWER	O
and	O
z/OS	B-Application
XL	O
C/C	O
++	O
compilers	O
optimizes	O
the	O
source	O
program	O
using	O
platform-agnostic	B-Operating_System
optimizations	O
such	O
as	O
interprocedural	O
analysis	O
,	O
profile-directed	O
feedback	O
,	O
and	O
loop	O
and	O
vector	O
optimizations	O
.	O
</s>
<s>
A	O
60-day	O
installable	O
evaluation	O
version	O
is	O
available	O
for	O
download	O
for	O
XL	O
C/C	O
++	O
for	O
AIX	B-Application
.	O
</s>
<s>
The	O
XL	O
compilers	O
on	O
AIX	B-Application
have	O
delivered	O
leadership	O
scores	O
in	O
the	O
SPEC	O
CPU2000	O
and	O
CPU2006	O
benchmarks	O
,	O
in	O
combination	O
with	O
specific	O
IBM	O
POWER	O
system	O
processor	O
announcements	O
,	O
for	O
example	O
,	O
SPEC	O
CPU2006	O
Floating	O
Point	O
score	O
of	O
71.5	O
in	O
May	O
2010	O
and	O
score	O
of	O
4051	O
in	O
August	O
2006	O
.	O
</s>
<s>
Current	O
versions	O
of	O
XL	O
C/C	O
++	O
for	O
AIX	B-Application
(	O
16.1	O
)	O
and	O
XL	O
C/C	O
++	O
for	O
Linux	B-Application
(	O
16.1.1	O
)	O
,	O
are	O
based	O
on	O
open-source	O
Clang	B-Application
front	O
end	O
(	O
part	O
of	O
the	O
Clang/LLVM	O
open	O
source	O
project	O
)	O
.	O
</s>
<s>
They	O
provide	O
support	O
for	O
C11	O
,	O
C++03	O
,	O
C++11	O
,	O
and	O
C++14	O
.	O
</s>
<s>
A	O
new	O
monthly	O
pricing	O
option	O
is	O
offered	O
in	O
XL	O
C/C	O
++	O
for	O
AIX	B-Application
16.1	O
and	O
XL	O
Fortran	O
for	O
AIX	B-Application
16.1	O
to	O
provide	O
more	O
flexibility	O
for	O
cloud-based	O
use	O
cases	O
.	O
</s>
<s>
With	O
the	O
launch	O
of	O
IBM	O
Power10	O
,	O
the	O
IBM	B-Language
XL	I-Language
C/C	I-Language
++	I-Language
for	O
AIX	B-Application
compiler	O
has	O
been	O
modernized	O
and	O
re-branded	O
to	O
IBM	O
Open	O
XL	O
C/C	O
++	O
for	O
AIX	B-Application
.	O
</s>
<s>
IBM	O
Open	O
XL	O
C/C	O
++	O
for	O
AIX	B-Application
17.1.0	O
combines	O
Clang/LLVM	O
technology	O
with	O
IBM	O
's	O
industry-leading	O
optimizations	O
,	O
which	O
provides	O
the	O
following	O
improved	O
capabilities	O
:	O
</s>
<s>
The	O
z/OS	B-Application
XL	O
C/C	O
++	O
compiler	O
exploits	O
the	O
IBM	O
Z®	O
systems	O
.	O
</s>
<s>
It	O
enables	O
the	O
development	O
of	O
high-performing	O
business	O
applications	O
and	O
system	O
programs	O
on	O
z/OS	B-Application
while	O
maximizing	O
hardware	O
use	O
and	O
improving	O
application	O
performance	O
.	O
</s>
<s>
IBM	B-Application
z/OS	I-Application
XL	O
C/C	O
++	O
uses	O
services	O
provided	O
by	O
the	O
z/OS	B-Application
Language	O
Environment®	O
and	O
Runtime	O
Library	O
Extensions	O
base	O
elements	O
.	O
</s>
<s>
It	O
supports	O
embedded	O
CICS®	O
and	O
SQL	O
statements	O
in	O
the	O
C/C	O
++	O
source	O
,	O
which	O
simplifies	O
the	O
operation	O
of	O
C/C	O
++	O
within	O
CICS	O
and	O
Db2®	O
environments	O
.	O
</s>
<s>
It	O
works	O
in	O
concert	O
with	O
the	O
IBM	O
Application	O
Delivery	O
Foundation	O
for	O
z/OS	B-Application
.	O
</s>
<s>
IBM®	O
Open	O
XL	O
C/C	O
++	O
1.1	O
for	O
z/OS	B-Application
®	O
is	O
the	O
newest	O
C/C	O
++	O
compiler	O
on	O
z/OS	B-Application
that	O
is	O
fully	O
based	O
on	O
the	O
open	O
source	O
LLVM	O
infrastructure	O
.	O
</s>
<s>
Open	O
XL	O
C/C	O
++	O
1.1	O
supports	O
up	O
to	O
C17/C18	O
and	O
C++17	O
language	O
standard	O
features	O
and	O
leverages	O
the	O
features	O
of	O
the	O
IBM	O
z16™	O
mainframe	O
,	O
ideal	O
for	O
z/OS	B-Application
UNIX	O
System	O
Services	O
users	O
porting	O
applications	O
from	O
distributed	O
platforms	O
.	O
</s>
<s>
Open	O
XL	O
C/C	O
++	O
1.1	O
is	O
available	O
as	O
a	O
no-charge	O
add-on	O
feature	O
for	O
users	O
who	O
have	O
enabled	O
the	O
z/OS	B-Application
XL	O
C/C	O
++	O
(	O
an	O
optionally	O
priced	O
feature	O
)	O
on	O
z/OS	B-Application
2.4	O
or	O
z/OS	B-Application
2.5	O
.	O
</s>
<s>
The	O
XL	O
C/C	O
++	O
compiler	O
family	O
consists	O
of	O
the	O
following	O
products	O
,	O
with	O
most	O
recent	O
version	O
and	O
release	O
dates	O
where	O
known	O
:	O
</s>
<s>
The	O
Open	O
XL	O
C/C	O
++	O
compiler	O
family	O
consists	O
of	O
the	O
following	O
products	O
,	O
with	O
the	O
most	O
recent	O
version	O
and	O
release	O
dates	O
where	O
known	O
:	O
</s>
