compile pascal source on Linux by FPC ?

[tissatussa]

hi, to compile a chess engine (Booot v6.5) i downloaded a set .pas files (with .dpr and .dproj file) but i'm not able to compile it on Linux (Xubuntu 22.04) .. i have FPC v3.2.2 installed and even Lazarus, but i'm stuck .. in terminal i tried :

Code: Pascal  [Select][+][-]

1. $ fpc ./booot6.dpr
2. Free Pascal Compiler version 3.2.2+dfsg-9ubuntu1 [2022/04/11] for x86_64
3. Copyright (c) 1993-2021 by Florian Klaempfl and others
4. Target OS: Linux for x86-64
5. Compiling ./booot6.dpr
6. Compiling uBitBoards.pas
7. Compiling uMagic.pas
8. uMagic.pas(91,6) Error: Identifier not found "Result"
9. uMagic.pas(113,5) Error: Identifier not found "Result"
10. uMagic.pas(135,5) Error: Identifier not found "Result"
11. uMagic.pas(147,5) Error: Identifier not found "Result"
12. uMagic.pas(157,5) Error: Identifier not found "Result"
13. uMagic.pas(171,4) Error: Identifier not found "result"
14. uMagic.pas(177,5) Error: Identifier not found "result"
15. uMagic.pas(182,5) Error: Identifier not found "result"
16. uMagic.pas(212,4) Error: Identifier not found "Result"
17. uMagic.pas(347,11) Error: Identifier not found "Result"
18. uMagic.pas(362,4) Error: Identifier not found "Result"
19. uMagic.pas(421) Fatal: There were 11 errors compiling module, stopping
20. Fatal: Compilation aborted
21. Error: /usr/bin/ppcx64 returned an error exitcode

the package does not have any README file .. do i need to add some parameters / options ?
i'm not a beginner at Linux, but i never did any Pascal.
i guess compiling my source should be pretty simple .. can anybody help me out ?

[Fred vS]

Hello.

Try to compile after adding this at begin of unit ( after: unit uMagic; )

Code: Pascal  [Select][+][-]

1. {$mode delphi} {$h+}

[EDIT] You may also use the mode parameter for fpc:

Code: Pascal  [Select][+][-]

1. $ fpc -Mdelphi ./booot6.dpr

[EDIT2] You may also try the excellent "pure fpc" chess engine from Roland:
https://gitlab.com/rchastain/moustique

[tissatussa]

indeed, the first line of 'uMagic.pas' is 'unit uMagic;' so i added '{$mode delphi} {$h+}' on the next line, as you suggest, but now i get this error :

Code: Pascal  [Select][+][-]

1. $ fpc ./booot6.dpr
2. Free Pascal Compiler version 3.2.2+dfsg-9ubuntu1 [2022/04/11] for x86_64
3. Copyright (c) 1993-2021 by Florian Klaempfl and others
4. Target OS: Linux for x86-64
5. Compiling ./booot6.dpr
6. Compiling uBitBoards.pas
7. Compiling uMagic.pas
8. uMagic.pas(405,6) Warning: Label not defined "l1"
9. Compiling uBoard.pas
10. Compiling uAttacks.pas
11. uAttacks.pas(30,4) Error: Identifier not found "Result"
12. uAttacks.pas(34,4) Error: Identifier not found "Result"
13. uAttacks.pas(38,4) Error: Identifier not found "Result"
14. uAttacks.pas(42,4) Error: Identifier not found "Result"
15. uAttacks.pas(46,4) Error: Identifier not found "Result"
16. uAttacks.pas(63,3) Error: Identifier not found "Result"
17. uAttacks.pas(69,4) Error: Identifier not found "Result"
18. uAttacks.pas(91,7) Error: Identifier not found "Result"
19. uAttacks.pas(99,7) Error: Identifier not found "Result"
20. uAttacks.pas(103,3) Error: Identifier not found "Result"
21. uAttacks.pas(123,3) Error: Identifier not found "Result"
22. uAttacks.pas(132,3) Error: Identifier not found "Result"
23. uAttacks.pas(139,7) Error: Identifier not found "Result"
24. uAttacks.pas(145,6) Error: Identifier not found "Result"
25. uAttacks.pas(152,6) Error: Identifier not found "Result"
26. uAttacks.pas(161,7) Error: Identifier not found "Result"
27. uAttacks.pas(178,7) Error: Identifier not found "Result"
28. uAttacks.pas(186,9) Error: Identifier not found "Result"
29. uAttacks.pas(187,9) Error: Identifier not found "Result"
30. uAttacks.pas(196,3) Error: Identifier not found "Result"
31. uAttacks.pas(200,9) Error: Identifier not found "Result"
32. uAttacks.pas(206,3) Error: Identifier not found "Result"
33. uAttacks.pas(209,7) Error: Identifier not found "Result"
34. uAttacks.pas(214,7) Error: Identifier not found "Result"
35. uAttacks.pas(219,7) Error: Identifier not found "Result"
36. uAttacks.pas(229,3) Error: Identifier not found "Result"
37. uAttacks.pas(237,7) Error: Identifier not found "Result"
38. uAttacks.pas(282,3) Error: Identifier not found "Result"
39. uAttacks.pas(333,7) Error: Identifier not found "Result"
40. uAttacks.pas(341,3) Error: Identifier not found "Result"
41. uAttacks.pas(356,7) Error: Identifier not found "Result"
42. uAttacks.pas(375,7) Error: Identifier not found "Result"
43. uAttacks.pas(397,3) Error: Identifier not found "Result"
44. uAttacks.pas(403,7) Error: Identifier not found "Result"
45. uAttacks.pas(406,3) Error: Identifier not found "Result"
46. uAttacks.pas(409) Fatal: There were 35 errors compiling module, stopping
47. Fatal: Compilation aborted
48. Error: /usr/bin/ppcx64 returned an error exitcode

your second option didn't succeed either :

Code: Pascal  [Select][+][-]

1. $ fpc --Mdelphi ./booot6.dpr
2. Error: Illegal parameter: --Mdelphi
3. Error: /usr/bin/ppcx64 returned an error exitcode

it failed .. i guess your '--' should be '-' so i did this, but it also failed :

Code: Pascal  [Select][+][-]

1. $ fpc -Mdelphi ./booot6.dpr
2. Free Pascal Compiler version 3.2.2+dfsg-9ubuntu1 [2022/04/11] for x86_64
3. Copyright (c) 1993-2021 by Florian Klaempfl and others
4. Target OS: Linux for x86-64
5. Compiling ./booot6.dpr
6. Compiling uBitBoards.pas
7. Compiling uMagic.pas
8. uMagic.pas(403,6) Warning: Label not defined "l1"
9. Compiling uBoard.pas
10. Compiling uAttacks.pas
11. uAttacks.pas(406,11) Note: Call to subroutine "function SquareAttackedBB(sq:LongInt;AllPieses:Int64;var Board:TBoard):Int64;" marked as inline is not inlined
12. uAttacks.pas(406,11) Note: Call to subroutine "function FindMinAttacker(Square:LongInt;MyAttackers:Int64;var Occupied:Int64;var Attackers:Int64;var Board:TBoard):LongInt;" marked as inline is not inlined
13. Compiling uHash.pas
14. uHash.pas(4,40) Fatal: Can't find unit Ansistrings used by uHash
15. Fatal: Compilation aborted
16. Error: /usr/bin/ppcx64 returned an error exitcode

[Fred vS]

Hum, difficult to give a diagnostic without seeing the source... 

Maybe in uHash.pas, in uses section,  remove Ansistrings unit.

it failed .. i guess your '--' should be '-'

Ooops, yes, fixed in previous post.

[tissatussa]

i can put a ZIP with the source here.

your newest option (compile the Moustique chess engine) DID succeed according to the compilation line on that page : i get a working binary.

[MarkMLl]

i can put a ZIP with the source here.

your newest option (compile the Moustique chess engine) DID succeed according to the compilation line on that page : i get a working binary.

Welcome to the forum, and congratulations on an exemplary first message: a clear statement of what you were trying to do, the compiler version etc. clearly shown in the message (rather than in the sig), and full error messages.

MarkMLl

[hansotten]

I had a look at the booot 6.5 sources. Looks like Windows is involved (handles).
Doubt it will run as is n Linux.

[Fred vS]

i can put a ZIP with the source here.

Hum, it will not be "out-of-the-box" to compile this project for Linux because there are many call to the "Windows" unit, like GetStdHandle, STD_INPUT_HANDLE, etc...
But, with some (many) cups coffee, and many {$ifndef mswindows} ... {$else} ... {$endif} it is doable.

[tissatussa]

thanks for pointing this out .. i often find sources (of other chess engines, in C, C++, D, etc) which are typical for Windows and they also are hard to convert / adjust for Linux .. sometimes i succeed, but it's rare.  I leave it for now .. nevermind.

[Fred vS]

If you are interested by Chess engine-program, here other excellent fpc projects compatible for Windows and Unix OS (all done by Roland Chastain):

Chess engines:
https://gitlab.com/rchastain/mater
https://github.com/rchastain/alouette

Chess programs:
https://github.com/rchastain/nero5
https://github.com/rchastain/eschecs

[Roland57]

Thank you Fred!

@tissatussa

Some time ago I made a Linux-compatible version of Booot 4.15. If you are interested, you can find it here. I think it behaves the same as the original.

I also tried with Booot 6 and succeeded to make a working version, but with wild modifications, so I prefer not to distribute it.

P.-S. There is another very strong Pascal chess program that I ported to Linux: Open Critter. But there are still things to fix. It crashes sometimes.

[PascalDragon]

Try to compile after adding this at begin of unit ( after: unit uMagic; )

Code: Pascal  [Select][+][-]

1. {$mode delphi} {$h+}

Please note that {$H+} is not required for mode Delphi as that is enabled by default when that mode is selected (for a very long time already).

[Fred vS]

Try to compile after adding this at begin of unit ( after: unit uMagic; )

Code: Pascal  [Select][+][-]

1. {$mode delphi} {$h+}

Please note that {$H+} is not required for mode Delphi as that is enabled by default when that mode is selected (for a very long time already).

Ha, ok, thanks for the tip. 

(Please note too that it is a very, very long time already that I did not use that mode.  )