<s>
GNAT	B-Language
is	O
a	O
free-software	B-Application
compiler	B-Language
for	O
the	O
Ada	B-Language
programming	I-Language
language	I-Language
which	O
forms	O
part	O
of	O
the	O
GNU	B-Application
Compiler	I-Application
Collection	I-Application
(	O
GCC	B-Application
)	O
.	O
</s>
<s>
Ada2012	O
,	O
Ada2005	O
,	O
Ada95	B-Language
and	O
Ada83	B-Language
.	O
</s>
<s>
Originally	O
its	O
name	O
was	O
an	O
acronym	O
that	O
stood	O
for	O
GNU	B-Language
NYU	I-Language
Ada	I-Language
Translator	I-Language
,	O
but	O
that	O
name	O
no	O
longer	O
applies	O
.	O
</s>
<s>
The	O
front-end	O
and	O
run-time	O
are	O
written	O
in	O
Ada	B-Language
.	O
</s>
<s>
The	O
GNAT	B-Language
project	O
started	O
in	O
1992	O
when	O
the	O
United	O
States	O
Air	O
Force	O
awarded	O
New	O
York	O
University	O
(	O
NYU	O
)	O
a	O
contract	O
to	O
build	O
a	O
free	B-Application
compiler	B-Language
for	O
Ada	B-Language
to	O
help	O
with	O
the	O
Ada9X	O
standardization	O
process	O
.	O
</s>
<s>
The	O
3-million-dollar	O
contract	O
required	O
the	O
use	O
of	O
the	O
GNU	B-License
GPL	I-License
for	O
all	O
development	O
,	O
and	O
assigned	O
the	O
copyright	O
to	O
the	B-Operating_System
Free	I-Operating_System
Software	I-Operating_System
Foundation	I-Operating_System
.	O
</s>
<s>
The	O
first	O
official	O
validation	O
of	O
GNAT	B-Language
occurred	O
in	O
1995	O
.	O
</s>
<s>
In	O
1994	O
and	O
1996	O
,	O
the	O
original	O
authors	O
of	O
GNAT	B-Language
founded	O
two	O
sister	O
companies	O
,	O
Ada	B-Language
Core	O
Technologies	O
in	O
New	O
York	O
City	O
and	O
ACT-Europe	O
(	O
later	O
AdaCore	O
SAS	O
)	O
in	O
Paris	O
,	O
to	O
provide	O
continuing	O
development	O
and	O
commercial	O
support	O
of	O
GNAT	B-Language
.	O
</s>
<s>
GNAT	B-Language
was	O
initially	O
released	O
separately	O
from	O
the	O
main	O
GCC	B-Application
sources	O
.	O
</s>
<s>
On	O
October	O
2	O
,	O
2001	O
,	O
the	O
GNAT	B-Language
sources	O
were	O
contributed	O
to	O
the	O
GCC	B-Application
CVS	B-Application
repository	O
.	O
</s>
<s>
The	O
last	O
version	O
to	O
be	O
released	O
separately	O
was	O
GNAT	B-Language
3.15p	O
,	O
based	O
on	O
GCC	B-Application
2.8.1	O
,	O
on	O
October	O
2	O
,	O
2002	O
.	O
</s>
<s>
Starting	O
with	O
GCC	B-Application
3.4	O
,	O
on	O
major	O
platforms	O
the	O
official	O
GCC	B-Application
release	O
is	O
able	O
to	O
pass	O
100%	O
of	O
the	O
ACATS	B-Language
Ada	B-Language
tests	O
included	O
in	O
the	O
GCC	B-Application
testsuite	O
.	O
</s>
<s>
By	O
GCC	B-Application
4.0	O
,	O
more	O
exotic	O
platforms	O
were	O
also	O
able	O
to	O
pass	O
100%	O
of	O
the	O
ACATS	B-Language
tests	O
.	O
</s>
<s>
The	O
compiler	B-Language
is	O
licensed	O
under	O
the	O
terms	O
of	O
the	O
GNU	B-License
GPL	I-License
3+	O
with	O
GCC	B-Application
Runtime	O
Library	O
Exception	O
.	O
</s>
<s>
The	O
GMGPL	O
license	O
is	O
GNU	B-License
GPL	I-License
2	O
with	O
a	O
linking	O
exception	O
that	O
permits	O
software	O
with	O
licenses	O
that	O
are	O
incompatible	O
with	O
the	O
GPL	B-License
to	O
be	O
linked	O
with	O
the	O
output	O
of	O
Ada	B-Language
standard	O
generic	O
libraries	O
that	O
are	O
supplied	O
with	O
GNAT	B-Language
without	O
breaching	O
the	O
license	O
agreement	O
.	O
</s>
<s>
FSF	O
GNAT	B-Language
is	O
part	O
of	O
most	O
major	O
Linux	B-Application
or	O
BSD	O
distributions	O
and	O
is	O
included	O
in	O
the	O
main	O
GCC	B-Application
Sources	O
.	O
</s>
<s>
GNAT	B-Language
Pro	I-Language
is	O
a	O
supported	O
version	O
of	O
GNAT	B-Language
from	O
AdaCore	O
.	O
</s>
<s>
In	O
addition	O
to	O
FSF	O
GNAT	B-Language
and	O
AdaCore	O
's	O
GNAT	B-Language
Pro	I-Language
,	O
AdaCore	O
releases	O
additional	O
versions	O
(	O
GNAT-GPL	O
,	O
a	O
public	O
older	O
version	O
of	O
GNAT	B-Language
Pro	I-Language
,	O
and	O
GNAT	B-Language
GAP	O
,	O
a	O
version	O
for	O
AdaCore	O
's	O
educational	O
programs	O
)	O
.	O
</s>
<s>
These	O
AdaCore	O
versions	O
have	O
the	O
runtime	O
exceptions	O
removed	O
,	O
this	O
requires	O
software	O
that	O
is	O
linked	O
with	O
the	O
standard	O
libraries	O
to	O
have	O
GPL-compatible	O
licenses	O
to	O
avoid	O
being	O
in	O
breach	O
of	O
the	O
license	O
agreement	O
.	O
</s>
<s>
JGNAT	B-Language
was	O
a	O
GNAT	B-Language
version	O
that	O
compiled	B-Language
from	O
the	O
Ada	B-Language
programming	I-Language
language	I-Language
to	O
Java	B-Language
bytecode	I-Language
.	O
</s>
<s>
GNAT	B-Language
for	O
dotNET	O
is	O
a	O
GNAT	B-Language
version	O
that	O
compiles	B-Language
from	O
the	O
Ada	B-Language
programming	I-Language
language	I-Language
to	O
Common	O
Language	O
Infrastructure	O
for	O
the	O
.NET	O
Framework	O
and	O
the	O
free	B-Application
and	O
open	O
source	O
implementations	O
Mono	O
and	O
Portable.NET	O
.	O
</s>
