<s>
Free	B-Operating_System
Pascal	I-Operating_System
Compiler	I-Operating_System
(	O
FPC	O
)	O
is	O
a	O
compiler	B-Language
for	O
the	O
closely	O
related	O
programming-language	O
dialects	O
Pascal	B-Application
and	O
Object	B-Language
Pascal	I-Language
.	O
</s>
<s>
It	O
is	O
free	B-Application
software	I-Application
released	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
,	O
with	O
that	O
allow	O
static	O
linking	O
against	O
its	O
runtime	B-Library
libraries	I-Library
and	O
packages	O
for	O
any	O
purpose	O
in	O
combination	O
with	O
any	O
other	O
software	O
license	O
.	O
</s>
<s>
It	O
supports	O
its	O
own	O
Object	B-Language
Pascal	I-Language
dialect	O
,	O
as	O
well	O
as	O
the	O
dialects	O
of	O
several	O
other	O
Pascal	B-Application
family	O
compilers	B-Language
to	O
a	O
certain	O
extent	O
,	O
including	O
those	O
of	O
Borland	B-Application
Pascal	I-Application
(	O
named	O
"	O
Turbo	B-Application
Pascal	I-Application
"	O
until	O
the	O
1990	O
version	O
6	O
)	O
,	O
Borland	O
(	O
later	O
Embarcadero	O
)	O
Delphi	B-Language
,	O
and	O
some	O
historical	O
Macintosh	B-Device
compilers	B-Language
.	O
</s>
<s>
The	O
dialect	O
is	O
selected	O
on	O
a	O
per-unit	O
(	O
module	B-Architecture
)	O
basis	O
,	O
and	O
more	O
than	O
one	O
dialect	O
can	O
be	O
used	O
per	O
program	O
.	O
</s>
<s>
It	O
follows	O
a	O
write	O
once	O
,	O
compile	B-Language
anywhere	O
philosophy	O
and	O
is	O
available	O
for	O
many	O
CPU	B-General_Concept
architectures	I-General_Concept
and	O
operating	B-General_Concept
systems	I-General_Concept
(	O
see	O
Targets	O
)	O
.	O
</s>
<s>
It	O
supports	O
inline	O
assembly	B-Language
language	I-Language
and	O
includes	O
an	O
internal	O
assembler	B-Language
capable	O
of	O
parsing	O
several	O
dialects	O
such	O
as	O
AT&T	O
and	O
Intel	O
style	O
.	O
</s>
<s>
There	O
are	O
separate	O
projects	O
to	O
facilitate	O
developing	O
cross-platform	B-Operating_System
graphical	B-Application
user	I-Application
interface	I-Application
(	O
GUI	B-Application
)	O
applications	O
,	O
the	O
most	O
prominent	O
one	O
being	O
the	O
Lazarus	B-Language
integrated	B-Application
development	I-Application
environment	I-Application
(	O
IDE	O
)	O
.	O
</s>
<s>
Initially	O
,	O
Free	B-Operating_System
Pascal	I-Operating_System
adopted	O
the	O
de	O
facto	O
standard	O
dialect	O
of	O
Pascal	B-Application
programmers	O
,	O
Borland	B-Application
Pascal	I-Application
,	O
but	O
later	O
adopted	O
Delphi	B-Language
's	O
Object	B-Language
Pascal	I-Language
.	O
</s>
<s>
From	O
version	O
2.0	O
on	O
,	O
Delphi	B-Language
compatibility	O
has	O
been	O
continuously	O
implemented	O
or	O
improved	O
.	O
</s>
<s>
The	O
project	O
has	O
a	O
compilation	B-Language
mode	O
concept	O
,	O
and	O
the	O
developers	O
made	O
it	O
clear	O
that	O
they	O
would	O
incorporate	O
working	O
patches	O
for	O
the	O
standardized	O
dialects	O
of	O
the	O
American	O
National	O
Standards	O
Institute	O
(	O
ANSI	O
)	O
and	O
International	O
Organization	O
for	O
Standardization	O
(	O
ISO	O
)	O
to	O
create	O
a	O
standards-compliant	O
mode	O
.	O
</s>
<s>
A	O
small	O
effort	O
has	O
been	O
made	O
to	O
support	O
some	O
of	O
the	O
Apple	O
Pascal	B-Application
syntax	O
to	O
ease	O
interfacing	O
to	O
the	O
Classic	B-Application
Mac	I-Application
OS	I-Application
and	O
macOS	B-Application
.	O
</s>
<s>
The	O
Apple	O
dialect	O
implements	O
some	O
standard	O
Pascal	B-Application
features	O
that	O
Turbo	B-Application
Pascal	I-Application
and	O
Delphi	B-Language
omit	O
.	O
</s>
<s>
The	O
2.2.x	O
release	O
series	O
did	O
not	O
significantly	O
change	O
the	O
dialect	O
objectives	O
beyond	O
roughly	O
Delphi	B-Language
7	O
level	O
syntax	O
,	O
instead	O
aiming	O
for	O
closer	O
compatibility	O
.	O
</s>
<s>
A	O
notable	O
exception	O
to	O
this	O
was	O
the	O
addition	O
of	O
support	O
for	O
to	O
Free	B-Operating_System
Pascal	I-Operating_System
in	O
version	O
2.2.0	O
,	O
several	O
years	O
before	O
they	O
were	O
supported	O
in	O
any	O
capacity	O
by	O
Delphi	B-Language
.	O
</s>
<s>
In	O
2011	O
several	O
Delphi	O
2006-specific	O
features	O
were	O
added	O
in	O
the	O
development	O
branch	O
,	O
and	O
some	O
of	O
the	O
starting	O
work	O
for	O
the	O
features	O
new	O
in	O
Delphi	B-Language
2009	I-Language
(	O
most	O
notably	O
the	O
addition	O
of	O
the	O
UnicodeString	O
type	O
)	O
was	O
completed	O
.	O
</s>
<s>
The	O
development	O
branch	O
also	O
has	O
an	O
Objective-Pascal	O
extension	O
for	O
Objective-C	B-Language
(	O
Cocoa	B-Operating_System
)	O
interfacing	O
.	O
</s>
<s>
As	O
of	O
version	O
2.7.1	O
,	O
Free	B-Operating_System
Pascal	I-Operating_System
implemented	O
basic	O
ISO	O
Pascal	B-Application
mode	O
,	O
though	O
many	O
things	O
such	O
as	O
the	O
Get	O
and	O
Put	O
procedures	O
,	O
and	O
the	O
file-buffer	O
variable	O
concept	O
for	O
file	O
handling	O
were	O
still	O
absent	O
.	O
</s>
<s>
As	O
of	O
version	O
3.0.0	O
,	O
ISO	O
Pascal	B-Application
mode	O
is	O
fairly	O
complete	O
.	O
</s>
<s>
It	O
has	O
been	O
able	O
to	O
compile	B-Language
org	O
's	O
P5	O
ISO	O
Pascal	B-Application
compiler	B-Language
with	O
no	O
changes	O
.	O
</s>
<s>
Free	B-Operating_System
Pascal	I-Operating_System
was	O
created	O
when	O
Borland	O
clarified	O
that	O
Borland	B-Application
Pascal	I-Application
development	O
for	O
DOS	B-Device
would	O
stop	O
with	O
version	O
7	O
,	O
to	O
be	O
replaced	O
by	O
a	O
Windows-only	O
product	O
,	O
which	O
later	O
became	O
Delphi	B-Language
.	O
</s>
<s>
Student	O
Florian	O
Paul	O
Klämpfl	O
began	O
developing	O
his	O
own	O
compiler	B-Language
written	O
in	O
the	O
Turbo	B-Application
Pascal	I-Application
dialect	O
and	O
produced	O
32-bit	O
code	O
for	O
the	O
GO32v1	O
DOS	B-Device
extender	I-Device
,	O
which	O
was	O
used	O
and	O
developed	O
by	O
the	O
DJ	B-Application
's	I-Application
GNU	I-Application
Programming	I-Application
Platform	I-Application
(	O
DJGPP	B-Application
)	O
project	O
at	O
that	O
time	O
.	O
</s>
<s>
Originally	O
,	O
the	O
compiler	B-Language
was	O
a	O
16-bit	B-Device
DOS	B-Device
executable	O
compiled	B-Language
by	O
Turbo	B-Application
Pascal	I-Application
.	O
</s>
<s>
After	O
two	O
years	O
,	O
the	O
compiler	B-Language
was	O
able	O
to	O
compile	B-Application
itself	I-Application
and	O
became	O
a	O
32-bit	O
executable	O
.	O
</s>
<s>
The	O
initial	O
32-bit	O
compiler	B-Language
was	O
published	O
on	O
the	O
Internet	O
,	O
and	O
the	O
first	O
contributors	O
joined	O
the	O
project	O
.	O
</s>
<s>
Later	O
,	O
a	O
Linux	B-Application
port	O
was	O
created	O
by	O
Michael	O
van	O
Canneyt	O
,	O
five	O
years	O
before	O
the	O
Borland	B-Application
Kylix	I-Application
Pascal	B-Application
compiler	B-Language
for	O
Linux	B-Application
became	O
available	O
.	O
</s>
<s>
The	O
DOS	B-Device
port	O
was	O
adapted	O
for	O
use	O
in	O
OS/2	B-Application
using	O
the	O
Eberhard	B-Device
Mattes	I-Device
eXtender	I-Device
(	O
EMX	B-Device
)	O
which	O
made	O
OS/2	B-Application
the	O
second	O
supported	O
compiling	B-Language
target	O
.	O
</s>
<s>
As	O
well	O
as	O
Florian	O
Klämpfl	O
the	O
original	O
author	O
,	O
Daniël	O
Mantione	O
also	O
contributed	O
significantly	O
to	O
make	O
this	O
happen	O
,	O
providing	O
the	O
original	O
port	O
of	O
the	O
run-time	B-Library
library	I-Library
to	O
OS/2	B-Application
and	O
EMX	B-Device
.	O
</s>
<s>
The	O
compiler	B-Language
improved	O
gradually	O
,	O
and	O
the	O
DOS	B-Device
version	O
migrated	O
to	O
the	O
GO32v2	O
extender	O
.	O
</s>
<s>
This	O
culminated	O
in	O
release	O
0.99.5	O
,	O
which	O
was	O
much	O
more	O
widely	O
used	O
than	O
prior	O
versions	O
,	O
and	O
was	O
the	O
last	O
release	O
aiming	O
only	O
for	O
Borland	B-Application
Pascal	I-Application
compliance	O
;	O
later	O
releases	O
added	O
a	O
Delphi	B-Language
compatibility	O
mode	O
.	O
</s>
<s>
This	O
release	O
was	O
also	O
ported	O
to	O
systems	O
using	O
Motorola	B-Device
68000	I-Device
family	I-Device
(	O
m68k	B-Device
)	O
processors	O
.	O
</s>
<s>
With	O
release	O
0.99.8	O
the	O
Win32	B-Library
target	O
was	O
added	O
,	O
and	O
a	O
start	O
was	O
made	O
with	O
incorporating	O
some	O
Delphi	B-Language
features	O
.	O
</s>
<s>
For	O
the	O
1.0.x	O
releases	O
,	O
the	O
port	O
to	O
68k	B-Device
CPU	O
was	O
redone	O
,	O
and	O
the	O
compiler	B-Language
produced	O
stable	O
code	O
for	O
several	O
68k	B-Device
Unix-like	B-Operating_System
and	O
AmigaOS	B-Application
operating	B-General_Concept
systems	I-General_Concept
.	O
</s>
<s>
During	O
the	O
stabilization	O
of	O
what	O
would	O
become	O
1.0.x	O
,	O
and	O
also	O
when	O
porting	O
to	O
the	O
Motorola	B-Device
68k	I-Device
systems	O
,	O
it	O
was	O
clear	O
that	O
the	O
design	O
of	O
the	O
code	O
generator	O
was	O
far	O
too	O
limited	O
in	O
many	O
aspects	O
.	O
</s>
<s>
For	O
these	O
reasons	O
,	O
the	O
1.1.x	O
series	O
branched	B-General_Concept
off	O
from	O
the	O
1.0.x	O
main	B-General_Concept
branch	I-General_Concept
in	O
December	O
1999	O
.	O
</s>
<s>
At	O
first	O
,	O
changes	O
were	O
mostly	O
clean-ups	O
and	O
rewrite-redesigns	O
to	O
all	O
parts	O
of	O
the	O
compiler	B-Language
.	O
</s>
<s>
Any	O
remaining	O
missing	O
Delphi	B-Language
compatibility	O
was	O
added	O
.	O
</s>
<s>
In	O
late	O
2003	O
,	O
a	O
working	O
PowerPC	B-Architecture
port	O
became	O
available	O
,	O
followed	O
by	O
an	O
ARM	B-Architecture
port	I-Architecture
in	O
summer	O
2004	O
,	O
a	O
SPARC	B-Architecture
port	O
in	O
fall	O
2004	O
,	O
and	O
an	O
x86-64-AMD64	O
port	O
in	O
early	O
2004	O
,	O
which	O
made	O
the	O
compiler	B-Language
available	O
for	O
a	O
64-bit	O
platform	O
.	O
</s>
<s>
Some	O
of	O
the	O
motives	O
for	O
this	O
roadmap	O
change	O
were	O
the	O
needs	O
of	O
the	O
Lazarus	B-Language
integrated	B-Application
development	I-Application
environment	I-Application
project	O
,	O
particularly	O
the	O
internal	O
linker	O
,	O
support	O
for	O
Win64	O
,	O
Windows	B-Operating_System
CE	I-Operating_System
,	O
and	O
OS	O
X	O
on	O
x86	B-Operating_System
,	O
and	O
related	O
features	O
like	O
DWARF	O
.	O
</s>
<s>
The	O
2.2.x	O
series	O
vastly	O
improved	O
support	O
for	O
the	O
ActiveX	B-Application
and	O
Component	B-Application
Object	I-Application
Model	I-Application
(	O
COM	O
)	O
interface	B-Application
,	O
and	O
Object	B-Operating_System
Linking	I-Operating_System
and	I-Operating_System
Embedding	I-Operating_System
(	O
OLE	O
)	O
,	O
though	O
bugs	O
were	O
still	O
being	O
found	O
.	O
</s>
<s>
The	O
delegation	O
to	O
interface	B-Application
using	O
the	O
implements	O
keyword	O
was	O
partly	O
implemented	O
,	O
but	O
was	O
not	O
complete	O
.	O
</s>
<s>
Library	O
support	O
for	O
ActiveX	B-Application
was	O
also	O
improved	O
.	O
</s>
<s>
Another	O
major	O
feature	O
was	O
the	O
internal	O
linker	O
for	O
Win32	B-Library
,	O
Win64	O
,	O
and	O
Windows	B-Operating_System
CE	I-Operating_System
,	O
which	O
greatly	O
improved	O
linking	O
time	O
and	O
memory	O
use	O
,	O
and	O
make	O
the	O
compile-link-run	O
cycle	O
in	O
Lazarus	B-Language
much	O
faster	O
.	O
</s>
<s>
Minor	O
new	O
features	O
included	O
improved	O
DWARF	O
(	O
2/3	O
)	O
debug	O
format	O
support	O
,	O
and	O
optimizations	O
such	O
as	O
tail	B-Language
recursion	I-Language
,	O
omission	O
of	O
unneeded	O
stack	O
frames	O
and	O
register-based	O
common	O
subexpression	O
elimination	O
(	O
CSE	O
)	O
optimization	O
.	O
</s>
<s>
A	O
first	O
implementation	O
of	O
generic	B-Language
programming	I-Language
(	O
generics	O
)	O
support	O
also	O
became	O
available	O
,	O
but	O
only	O
experimentally	O
.	O
</s>
<s>
Mostly	O
these	O
risky	O
commits	O
were	O
more	O
involved	O
improvements	O
to	O
the	O
new	O
platforms	O
,	O
Mac	O
PowerPC	B-Architecture
64	O
,	O
Mac	O
x86-64	B-Device
,	O
iPhone	O
,	O
and	O
many	O
fixes	O
to	O
the	O
ARM	B-Architecture
and	O
x86-64	B-Device
architectures	O
in	O
general	O
,	O
as	O
well	O
as	O
DWARF	O
.	O
</s>
<s>
Other	O
compiler	B-Language
improvements	O
included	O
whole	O
program	O
optimization	O
(	O
WPO	O
)	O
and	O
devirtualization	O
and	O
ARM	B-Architecture
embedded-application	O
binary	O
interface	B-Application
(	O
EABI	O
)	O
support	O
.	O
</s>
<s>
Later	O
,	O
during	O
the	O
2.2	O
cycle	O
,	O
a	O
more	O
Delphi-like	O
resource	O
support	O
(	O
based	O
on	O
special	O
sections	O
in	O
the	O
binary	O
instead	O
of	O
Pascal	B-Application
constants	O
)	O
was	O
added	O
.	O
</s>
<s>
This	O
feature	O
,	O
direly	O
needed	O
by	O
Lazarus	B-Language
,	O
became	O
the	O
main	O
highlight	O
of	O
the	O
branch	O
.	O
</s>
<s>
Other	O
more	O
minor	O
additions	O
were	O
a	O
memory	B-General_Concept
manager	I-General_Concept
that	O
improved	O
heap	B-General_Concept
manager	O
performance	O
in	O
threaded	B-Operating_System
environments	O
,	O
small	O
improvements	O
in	O
Delphi	B-Language
compatibility	O
such	O
as	O
OleVariant	O
,	O
and	O
improvements	O
in	O
interface	B-Application
delegation	O
.	O
</s>
<s>
On	O
January	O
1	O
,	O
2010	O
,	O
Free	B-Operating_System
Pascal	I-Operating_System
2.4.0	O
was	O
released	O
,	O
followed	O
on	O
November	O
13	O
,	O
2010	O
,	O
by	O
bug	O
fix	O
release	O
2.4.2	O
,	O
with	O
support	O
for	O
for	O
..	O
in	O
loops	O
,	O
sealed	O
and	O
abstract	O
classes	O
,	O
and	O
other	O
changes	O
.	O
</s>
<s>
In	O
January	O
2012	O
,	O
Free	B-Operating_System
Pascal	I-Operating_System
2.6	O
was	O
released	O
.	O
</s>
<s>
This	O
first	O
version	O
from	O
the	O
2.6	O
release	O
series	O
also	O
supported	O
Objective	O
Pascal	B-Application
on	O
OS	O
X	O
and	O
iOS	B-Operating_System
targets	O
and	O
implemented	O
many	O
small	O
improvements	O
and	O
bug	O
fixes	O
.	O
</s>
<s>
It	O
contained	O
NetBSD	B-Device
and	O
OpenBSD	B-Operating_System
releases	O
for	O
the	O
first	O
time	O
since	O
1.0.10	O
,	O
based	O
on	O
fresh	O
ports	O
.	O
</s>
<s>
Version	O
3.0.2	O
was	O
released	O
on	O
February	O
15	O
,	O
2017	O
,	O
and	O
includes	O
bug	O
fixes	O
and	O
minor	O
compiler	B-Language
updates	O
.	O
</s>
<s>
It	O
includes	O
many	O
language	O
improvements	O
over	O
previous	O
versions	O
,	O
including	O
an	O
internal	O
linker	O
for	O
Executable	O
and	O
Linkable	O
Format	O
(	O
ELF	O
)	O
,	O
Arm	B-Architecture
AARCH64	B-Device
for	O
iOS	B-Operating_System
and	O
Linux	B-Application
,	O
a	O
revived	O
i8086	B-General_Concept
platform	O
,	O
extended	O
libraries	O
and	O
much	O
more	O
.	O
</s>
<s>
Version	O
3.2.2	O
was	O
released	O
on	O
May	O
20	O
,	O
2021	O
,	O
and	O
supports	O
macOS	B-Application
on	O
AArch64	B-Device
and	O
naming	O
of	O
threads	B-Operating_System
.	O
</s>
<s>
Additionally	O
it	O
includes	O
bug	O
fixes	O
and	O
minor	O
compiler	B-Language
updates	O
.	O
</s>
<s>
Free	B-Operating_System
Pascal	I-Operating_System
also	O
supports	O
byte	O
code	O
generation	O
for	O
the	O
Java	B-Language
Virtual	I-Language
Machine	I-Language
as	O
of	O
version	O
3.0.0	O
and	O
targets	O
both	O
Oracle	O
's	O
Java	B-Device
and	O
Google	B-Application
's	I-Application
Android	I-Application
JVM	B-Language
,	O
although	O
Object	B-Language
Pascal	I-Language
syntax	O
is	O
not	O
fully	O
supported	O
.	O
</s>
<s>
Free	B-Operating_System
Pascal	I-Operating_System
3.0.0	O
also	O
supports	O
ARMHF	O
platforms	O
like	O
the	O
Raspberry	B-Operating_System
Pi	I-Operating_System
,	O
including	O
ARMV6-EABIHF	O
running	O
on	O
Raspbian	O
.	O
</s>
<s>
Work	O
on	O
64-bit	O
ARM	B-Architecture
has	O
resulted	O
in	O
support	O
for	O
iOS	B-Operating_System
in	O
3.0.0	O
as	O
well	O
.	O
</s>
<s>
A	O
native	O
ARM	B-Architecture
Android	B-Application
target	O
has	O
been	O
added	O
,	O
ending	O
the	O
formerly	O
hacked	O
ARM	B-Architecture
Linux	B-Application
target	O
to	O
generate	O
native	O
ARM	B-Architecture
libraries	O
for	O
Android	B-Application
.	O
</s>
<s>
This	O
makes	O
porting	O
Lazarus	B-Language
applications	O
to	O
Android	B-Application
(	O
using	O
Custom	O
Drawn	O
Interface	B-Application
)	O
easier	O
.	O
</s>
<s>
Since	O
FPC	O
2.6.2	O
,	O
OpenBSD	B-Operating_System
and	O
NetBSD	B-Device
are	O
supported	O
on	O
IA32	O
and	O
X86_64	O
architectures	O
.	O
</s>
<s>
A	O
new	O
target	O
embedded	B-Architecture
has	O
been	O
added	O
for	O
usage	O
without	O
OS	O
(	O
ARM	B-Architecture
Cortex	O
M	O
and	O
MIPS	B-Device
mainly	O
)	O
.	O
</s>
<s>
With	O
InstantFPC	O
it	O
is	O
possible	O
to	O
run	O
Pascal	B-Application
programs	O
,	O
which	O
are	O
translated	O
just	O
in	O
time	O
,	O
as	O
Unix	O
scripts	O
or	O
CGI	B-Language
back-end	O
.	O
</s>
<s>
Ultibo	O
core	O
is	O
an	O
embedded	B-Architecture
or	O
bare	O
metal	O
development	O
environment	O
for	O
Raspberry	B-Operating_System
Pi	I-Operating_System
.	O
</s>
<s>
Ultibo	O
is	O
based	O
on	O
Free	B-Operating_System
Pascal	I-Operating_System
and	O
developed	O
under	O
a	O
modified	O
version	O
of	O
Lazarus	B-Language
.	O
</s>
<s>
The	O
IDE	O
is	O
PC	O
based	O
but	O
has	O
been	O
ported	O
to	O
Linux	B-Application
and	O
Mac	O
as	O
well	O
.	O
</s>
<s>
The	O
runtime	O
implements	O
multi-threaded	B-Operating_System
,	O
pre-emptive	O
multitasking	O
.	O
</s>
<s>
The	O
programmer	O
can	O
put	O
threads	B-Operating_System
on	O
a	O
specific	O
CPU	O
or	O
let	O
the	O
runtime	O
divide	O
the	O
load	O
automatically	O
or	O
a	O
mix	O
of	O
the	O
two	O
.	O
</s>
<s>
Most	O
Raspberry	B-Operating_System
Pi	I-Operating_System
models	O
are	O
supported	O
including	O
the	O
A	O
,	O
B	O
,	O
A+	O
and	O
B+	O
as	O
well	O
as	O
the	O
Raspberry	B-Operating_System
Pi	I-Operating_System
2B	O
,	O
3B	O
,	O
4B/400/CM4	O
and	O
Zero	O
.	O
</s>
<s>
Like	O
most	O
modern	O
compilers	B-Language
,	O
Free	B-Operating_System
Pascal	I-Operating_System
can	O
be	O
used	O
with	O
an	O
integrated	B-Application
development	I-Application
environment	I-Application
(	O
IDE	O
)	O
.	O
</s>
<s>
Lazarus	B-Language
is	O
the	O
most	O
popular	O
IDE	O
used	O
by	O
Free	B-Operating_System
Pascal	I-Operating_System
programmers	O
.	O
</s>
<s>
It	O
looks	O
and	O
feels	O
similar	O
to	O
the	O
Delphi	B-Language
IDE	O
,	O
and	O
can	O
be	O
used	O
to	O
create	O
console	B-Device
and	O
graphical	B-Application
applications	O
,	O
Windows	B-Application
services	O
,	O
daemons	B-Operating_System
,	O
and	O
web	B-Application
applications	I-Application
.	O
</s>
<s>
Lazarus	B-Language
provides	O
a	O
cross-platform	B-Operating_System
user	O
interface	B-Application
framework	O
,	O
called	O
Lazarus	B-Language
Component	I-Language
Library	I-Language
(	O
LCL	O
)	O
.	O
</s>
<s>
Graphical	B-Application
applications	O
created	O
with	O
LCL	O
can	O
be	O
ported	O
to	O
another	O
platform	O
via	O
recompiling	O
or	O
cross	B-Application
compiling	I-Application
.	O
</s>
<s>
Free	B-Operating_System
Pascal	I-Operating_System
has	O
its	O
own	O
text-mode	B-Application
IDE	O
resembling	O
Turbo	B-Application
Pascal	I-Application
's	O
IDE	O
.	O
</s>
<s>
It	O
is	O
made	O
using	O
the	O
Free	O
Vision	O
framework	O
(	O
also	O
included	O
with	O
Free	B-Operating_System
Pascal	I-Operating_System
)	O
,	O
a	O
Turbo	O
Vision	O
clone	O
.	O
</s>
<s>
In	O
addition	O
to	O
many	O
features	O
of	O
the	O
Turbo	B-Application
Pascal	I-Application
IDE	O
,	O
it	O
has	O
code	O
completion	O
and	O
support	O
for	O
multiple	O
help	O
file	O
formats	O
(	O
HTML	O
,	O
Microsoft	B-Protocol
Compiled	I-Protocol
HTML	I-Protocol
Help	I-Protocol
(	O
CHM	O
)	O
,	O
Information	B-Language
Presentation	I-Language
Facility	I-Language
(	O
IPF	O
)	O
.	O
</s>
<s>
Instead	O
of	O
using	O
command	O
line	O
tools	O
,	O
the	O
IDE	O
uses	O
its	O
own	O
embedded	B-Architecture
compiler	B-Language
,	O
based	O
on	O
the	O
same	O
source	O
as	O
the	O
command	O
line	O
compiler	B-Language
and	O
debugger	O
(	O
using	O
libgdb	O
or	O
GDBMI	O
)	O
to	O
provide	O
its	O
functionality	O
.	O
</s>
<s>
Dev-Pascal	B-Language
is	O
a	O
free	O
Windows-only	O
IDE	O
for	O
Free	B-Operating_System
Pascal	I-Operating_System
and	O
GNU	B-Language
Pascal	I-Language
,	O
with	O
no	O
further	O
development	O
following	O
the	O
2004	O
FPC	O
version	O
and	O
the	O
2005	O
GPC	O
version	O
.	O
</s>
<s>
Apart	O
from	O
a	O
compiler	B-Language
and	O
an	O
IDE	O
,	O
Free	B-Operating_System
Pascal	I-Operating_System
provides	O
the	O
following	O
libraries	O
:	O
</s>
<s>
ULTIBO	O
Core ]	O
is	O
a	O
development	O
environment	O
targeting	O
bare-metal	O
(	O
no	O
operating	B-General_Concept
system	I-General_Concept
)	O
Raspbian	O
PI	O
boards	O
.	O
</s>
<s>
It	O
uses	O
FreePascal/Lazarus	O
and	O
links	O
the	O
application	O
with	O
an	O
unikernel	O
runtime	O
.	O
</s>
<s>
Beyond	B-Language
Compare	I-Language
is	O
a	O
data	O
comparison	O
utility	O
for	O
Windows	B-Application
,	O
OS	O
X	O
,	O
and	O
Linux	B-Application
.	O
</s>
<s>
The	O
Linux	B-Application
and	O
OS	O
X	O
versions	O
are	O
compiled	B-Language
with	O
Lazarus/FPC	O
.	O
</s>
<s>
Cartes	B-Application
du	I-Application
Ciel	I-Application
is	O
a	O
free	O
planetarium	O
program	O
for	O
Linux	B-Application
,	O
OS	O
X	O
,	O
and	O
Windows	B-Application
.	O
</s>
<s>
It	O
was	O
fully	O
written	O
in	O
Lazarus/FPC	O
,	O
and	O
released	O
under	O
GPL	B-License
.	O
</s>
<s>
Cheat	B-Language
Engine	I-Language
is	O
a	O
proprietary	O
,	O
source	O
available	O
,	O
Freeware	O
memory	O
scanner	O
,	O
hex	O
editor	O
,	O
and	O
debugger	O
.	O
</s>
<s>
Since	O
version	O
6.0	O
it	O
is	O
compiled	B-Language
with	O
Lazarus/FPC	O
.	O
</s>
<s>
D_2D	O
&	O
D_3D	O
data	B-Application
plotting	I-Application
programs	I-Application
.	O
</s>
<s>
Double	B-Language
Commander	I-Language
is	O
an	O
open-source	O
multi-platform	B-Operating_System
two-panel	O
orthodox	O
file	O
manager	O
inspired	O
by	O
the	O
Microsoft	O
Windows-only	O
Total	O
Commander	O
.	O
</s>
<s>
Free	B-Operating_System
Pascal	I-Operating_System
is	O
written	O
in	O
Object	B-Language
Pascal	I-Language
and	O
assembly	B-Language
language	I-Language
,	O
and	O
self-compiled	O
.	O
</s>
<s>
HNSKY	B-Language
,	O
Hallo	B-Language
Northern	I-Language
Sky	I-Language
is	O
a	O
free	O
planetarium	O
program	O
for	O
Windows	B-Application
and	O
Linux	B-Application
.	O
</s>
<s>
Since	O
version	O
3.4.0	O
written	O
&	O
compiled	B-Language
with	O
Lazarus/FPC	O
.	O
</s>
<s>
Lazarus	B-Language
:	O
Free	B-Operating_System
Pascal	I-Operating_System
's	O
affiliated	O
Delphi-like	O
software	B-Architecture
package	I-Architecture
for	O
rapid	O
development	O
of	O
graphical	B-Application
applications	O
.	O
</s>
<s>
Morfik	O
:	O
Morfik	O
WebOS	O
AppBuilder	B-Language
uses	O
Free	B-Operating_System
Pascal	I-Operating_System
to	O
produce	O
CGI	B-Language
binaries	O
.	O
</s>
<s>
MyNotex	B-Language
is	O
a	O
free	B-Application
software	I-Application
note-taking	O
and	O
notes	O
manager	O
for	O
Linux	B-Application
.	O
</s>
<s>
Early	O
versions	O
of	O
the	O
Nim	B-Application
compiler	B-Language
were	O
developed	O
in	O
Free	B-Operating_System
Pascal	I-Operating_System
,	O
before	O
it	O
became	O
self-hosting	O
in	O
Nim	B-Application
.	O
</s>
<s>
Peazip	B-Application
is	O
an	O
open	O
source	O
archiver	O
,	O
made	O
with	O
Lazarus/FPC	O
.	O
</s>
<s>
TorChat	B-Protocol
,	O
previously	O
written	O
in	O
Python	O
,	O
is	O
now	O
being	O
rewritten	O
in	O
Free	B-Operating_System
Pascal	I-Operating_System
and	O
Lazarus	B-Language
.	O
</s>
<s>
Tranzistow	O
is	O
a	O
32/64	O
-bit	O
software	O
synthesizer	O
for	O
Windows	B-Application
and	O
Linux	B-Application
developed	O
with	O
FreePascal/Lazarus	O
.	O
</s>
