The GNU Pascal Manual

GNU Pascal
Welcome to GNU Pascal ...
1 Some of GPC's most interesting features.
2 New Features of GNU Pascal.
3 The GNU Pascal Frequently Asked Questions List.
- 3.1 GNU Pascal
- 3.2 Installing GPC
- 3.3 GNU Pascal on the DJGPP (MS-DOS) platform
- 3.4 Strings
- 3.5 Getting Help
- 3.6 Miscellaneous
4 How to download, compile and install GNU Pascal.
- 4.1 Where and what to download
- 4.2 Installation instructions for a GPC binary distribution
- 4.3 Compiling GPC
- 4.4 Compilation notes for specific platforms
- 4.5 Building and Installing a cross-compiler
- 4.6 Crossbuilding a compiler
5 Command Line Options supported by GNU Pascal.
- 5.1 GPC options besides those of GCC.
- 5.2 The most commonly used options to GPC
6 The Programmer's Guide to GPC
- 6.1 Source Structures
- 6.2 Data Types
- 6.3 Operators
  - 6.3.1 Built-in Operators
  - 6.3.2 User-defined Operators
- 6.4 Procedure And Function Parameters
- 6.5 Accessing parts of strings (and other arrays)
- 6.6 Pointer Arithmetics
- 6.7 Type Casts
- 6.8 Object-Oriented Programming
- 6.9 Compiler Directives And The Preprocessor
- 6.10 Routines Built-in or in the Run Time System
- 6.11 Interfacing with Other Languages
  - 6.11.1 Importing Libraries from Other Languages
  - 6.11.2 Exporting GPC Libraries to Other Languages
- 6.12 Notes for Debugging
- 6.13 How to use I18N in own programs
- 6.14 Pascal declarations for GPC's Run Time System
- 6.15 Units included with GPC
7 A QuickStart Guide from Borland Pascal to GNU Pascal.
- 7.1 BP Compatibility
- 7.2 BP Incompatibilities
  - 7.2.1 String type
  - 7.2.2 Qualified identifiers
  - 7.2.3 Assembler
  - 7.2.4 Move; FillChar
  - 7.2.5 Real type
  - 7.2.6 Graph unit
  - 7.2.7 OOP units
  - 7.2.8 Keep; GetIntVec; SetIntVec
  - 7.2.9 TFDDs
  - 7.2.10 Mem; Port; Ptr; Seg; Ofs; PrefixSeg; etc.
  - 7.2.11 Endianness assumptions
  - 7.2.12 - -borland-pascal - disable GPC extensions
  - 7.2.13 -w - disable all warnings
  - 7.2.14 - -uses=System - Swap; HeapError; etc.
  - 7.2.15 -D__BP_TYPE_SIZES__ - small integer types etc.
  - 7.2.16 - -pack-struct - disable structure alignment
  - 7.2.17 -D__BP_RANDOM__ - BP compatible pseudo random number generator
  - 7.2.18 -D__BP_UNPORTABLE_ROUTINES__ - Intr; DosVersion; etc.
  - 7.2.19 -D__BP_PARAMSTR_0__ - BP compatible ParamStr (0) behaviour
- 7.3 IDE versus command line
- 7.4 Comments
- 7.5 BP Compatible Compiler Directives
- 7.6 Units, GPI files and Automake
- 7.7 Optimization
- 7.8 Debugging
- 7.9 Objects
- 7.10 Strings in BP and GPC
- 7.11 Typed Constants
- 7.12 Bit, Byte and Memory Manipulation
- 7.13 User-defined Operators in GPC
- 7.14 Data Types in BP and GPC
- 7.15 BP Procedural Types
- 7.16 Files
- 7.17 Built-in Constants
- 7.18 Built-in Operators in BP and GPC
- 7.19 Built-in Procedures and Functions
- 7.20 Special Parameters
- 7.21 Miscellaneous
- 7.22 BP and Extended Pascal
- 7.23 Portability hints
8 The Alphabetical GPC Language Reference
- Abs
- absolute
- abstract
- Addr
- AlignOf
- all
- and
- and then
- and_then
- AnsiChar
- AnyFile
- Append
- ArcCos
- ArcSin
- ArcTan
- Arg
- array
- as
- asm
- asmname
- Assert
- Assign
- Assigned
- attribute
- begin
- Bind
- bindable
- Binding
- BindingType
- BitSizeOf
- BlockRead
- BlockWrite
- Boolean
- Break
- Byte
- ByteBool
- ByteCard
- ByteInt
- c
- Card
- Cardinal
- case
- CBoolean
- CCardinal
- Char
- ChDir
- Chr
- CInteger
- c_language
- class
- Close
- Cmplx
- Comp
- CompilerAssert
- Complex
- Concat
- Conjugate
- const
- constructor
- Continue
- Copy
- Cos
- CString
- CString2String
- CStringCopyString
- CurrentRoutineName
- CWord
- Cycle
- Date
- Dec
- DefineSize
- Delete
- destructor
- Discard
- Dispose
- div
- do
- Double
- downto
- else
- Empty
- end
- EOF
- EOLn
- EpsReal
- EQ
- EQPad
- Erase
- Exclude
- Exit
- Exp
- export
- exports
- Extend
- Extended
- external
- Fail
- False
- far
- file
- FilePos
- FileSize
- FillChar
- finalization
- Finalize
- Flush
- for
- FormatString
- forward
- Frac
- FrameAddress
- FreeMem
- function
- GE
- GEPad
- Get
- GetMem
- GetTimeStamp
- goto
- GT
- GTPad
- Halt
- High
- if
- Im
- implementation
- import
- in
- Inc
- Include
- Index
- inherited
- initialization
- Initialize
- InOutRes
- Input
- Insert
- Int
- Integer
- interface
- interrupt
- IOResult
- is
- label
- LastPosition
- LE
- Leave
- Length
- LEPad
- library
- Ln
- LoCase
- LongBool
- LongCard
- LongestBool
- LongestCard
- LongestInt
- LongestReal
- LongestWord
- LongInt
- LongReal
- LongWord
- Low
- LT
- LTPad
- Mark
- Max
- MaxChar
- MaxInt
- MaxReal
- MedBool
- MedCard
- MedInt
- MedReal
- MedWord
- Min
- MinReal
- MkDir
- mod
- module
- Move
- MoveLeft
- MoveRight
- name
- NE
- near
- NEPad
- New
- NewCString
- nil
- not
- Null
- object
- Odd
- of
- only
- operator
- or
- Ord
- or else
- or_else
- otherwise
- Output
- Pack
- packed
- Page
- PAnsiChar
- ParamCount
- ParamStr
- PChar
- Pi
- PObjectType
- Pointer
- Polar
- Pos
- Position
- pow
- Pred
- private
- procedure
- program
- property
- protected
- PtrCard
- PtrDiffType
- PtrInt
- PtrWord
- public
- published
- Put
- qualified
- Random
- Randomize
- Re
- Read
- ReadLn
- ReadStr
- Real
- record
- Release
- Rename
- repeat
- Reset
- resident
- restricted
- Result
- Return
- ReturnAddress
- Rewrite
- RmDir
- Round
- RunError
- Seek
- SeekEOF
- SeekEOLn
- SeekRead
- SeekUpdate
- SeekWrite
- segment
- Self
- set
- SetFileTime
- SetLength
- SetType
- shl
- ShortBool
- ShortCard
- ShortInt
- ShortReal
- ShortWord
- shr
- Sin
- Single
- SizeOf
- SizeType
- SmallInt
- Sqr
- SqRt
- StandardError
- StandardInput
- StandardOutput
- StdErr
- Str
- String
- String2CString
- SubStr
- Succ
- Text
- then
- Time
- TimeStamp
- to
- to begin do
- to end do
- Trim
- True
- Trunc
- Truncate
- type
- type of
- TypeOf
- Unbind
- unit
- Unpack
- until
- UpCase
- Update
- uses
- Val
- value
- var
- view
- virtual
- Void
- while
- with
- Word
- WordBool
- Write
- WriteLn
- WriteStr
- xor
9 Pascal keywords and operators supported by GNU Pascal.
10 Where to get support for GNU Pascal; how to report bugs.
- 10.1 The GPC Mailing List
- 10.2 The GPC Mailing List Archives
- 10.3 Newsgroups relevant to GPC
- 10.4 Where to get individual support for GPC
- 10.5 If the compiler crashes ...
- 10.6 How to report GPC bugs
- 10.7 Running the GPC Test Suite
11 The GNU Pascal To-Do List.
- 11.1 Known bugs in GPC
- 11.2 Features planned for GPC
- 11.3 Problems that have been solved
12 The GPC Source Reference
- 12.1 The Pascal preprocessor
- 12.2 GPC's Lexical Analyzer
- 12.3 Syntax parsing: GPC's Parser
- 12.4 Tree Nodes
- 12.5 Parameter Passing
- 12.6 GPI files – GNU Pascal Interfaces
- 12.7 GPC's Automake Mechanism – How it Works
- 12.8 Files that make up GPC
- 12.9 Planned features
Appendix A GNU GENERAL PUBLIC LICENSE
- GPL Preamble
- How to Apply These Terms to Your New Programs
Appendix B GNU LESSER GENERAL PUBLIC LICENSE
- LGPL Preamble
- How to Apply These Terms to Your New Libraries
Appendix C DEMO COPYING
Appendix D Contributors to GNU Pascal.
Appendix E Resources For Use With GPC.
Appendix F The GNU Project.
- F.1 The GNU Manifesto
- F.2 Funding Free Software
Index-GPC

This manual documents how to run, install and maintain the GNU Pascal Compiler (GPC), as well as its new features and incompatibilities, and how to report bugs. It corresponds to GPC 20050331 (GCC 2.8.1, 2.95.x, 3.2.x, 3.3.x or 3.4.x).

The GNU Pascal Manual

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GNU Pascal