internal Compiler Error

[paule32]

Hello,
I have a Unit xmm.pas - when I try to compile it:

Code: Bash  [Select][+][-]

1. T:\a>fpc.exe -dDLLEXPORT -dLANGDEU -dDLLDEBUG -n     -Twin64 -FE. -Fu. -O3 -Os xmm.pas

I get the following Error:

Code: Bash  [Select][+][-]

1. xmm.pas(17,10) Error: Duplicate identifier "SYSTEM"
2. xmm.pas(17,10) Error: Compilation raised exception internally
3. Fatal: Compilation aborted
4. An unhandled exception occurred at $00000001000615EC:
5. EAccessViolation: Access violation
6.   $00000001000615EC
7.   $0000000100045FFA
8.   $00000001000461DB
9.   $000000010019D378
10.   $000000010003DCE5
11.   $0000000100017941
12.   $0000000100001A3D
13.   $0000000100001A56
14.   $0000000100014280
15.   $0000000100001850
16.   $00007FFD4B2B257D
17.   $00007FFD4CDEAF08

Line 17:

Code: Pascal  [Select][+][-]

1. interface

I have attach the source file xmm.pas below the request...

[marcov]

Works fine for me with both trunk and release, but I get compilation errors.

Code: Pascal  [Select][+][-]

1. c:\testing>fpc -Px86_64 -Twin64 xmm.pas
2. Free Pascal Compiler version 3.2.2 [2021/05/15] for x86_64
3. Copyright (c) 1993-2021 by Florian Klaempfl and others
4. Target OS: Win64 for x64
5. Compiling xmm.pas
6. xmm.pas(168,9) Error: Identifier not found "_atomic32"
7. xmm.pas(174,3) Error: Identifier not found "_atomic32"
8. xmm.pas(272,13) Error: Identifier not found "xgetmem"
9. xmm.pas(275,3) Error: Identifier not found "xfillmem"
10. xmm.pas(453,13) Error: Identifier not found "xfillmem"
11. xmm.pas(581,3) Error: Identifier not found "xmminit"
12. xmm.pas(584) Fatal: There were 6 errors compiling module, stopping
13. Fatal: Compilation aborted
14. Error: c:\fpc\3.2.2\bin\i386-win32\ppcrossx64.exe returned an error exitcode

Sounds like it is a problem with a custom RTL or so.

[Nitorami]

marcov: Setting -dDLLEXPORT avoids these error messages.

When compiling with Lazarus 2.2.6 (64bit) and FPC3.2.2 under windows, I get this message

"Fatal: Kann system nicht finden verwendet von xmm. Stellen Sie sicher, daß alle .ppu-Dateien eines Packages sich in dessem Ausgabeverzeichnis befinden. ppu im falschen Verzeichnis=C:\lazarus\fpc\3.2.2\units\x86_64-win64\rtl\system.ppu.."

Does that help ?

EDIT: When copying system.ppu across as requested, the message goes away but then the complaint is about objpas.ppu...

EDIT2: When simply copying all x86-win64 ppus across to the program's output directory, the only remaining error is the undeclared identifier MEM_RESERVE.

Wwhat is specific about this code that the compiler seems to expect all ppus in the program's output directory ?

[Thaddy]

Naming your file xmm is a bit like little Bobby drop tables.
Asking for trouble.

[paule32]

the Problem lay in the using of Command Line Options...

I have to use always -B (build all new) - then I compile/work
When I use without   -B (and with -Ur) - problems begin
When I use with  -Us -Ur the problems begin, too - but a little bit other than the line above ...

It is not a problem, that I share the source code.
The thinking is an artefact on fibodev, he would not public his code - but now, he give me green light to publish it.

[marcov]

marcov: Setting -dDLLEXPORT avoids these error messages.

When compiling with Lazarus 2.2.6 (64bit) and FPC3.2.2 under windows, I get this message

"Fatal: Kann system nicht finden verwendet von xmm. Stellen Sie sicher, daß alle .ppu-Dateien eines Packages sich in dessem Ausgabeverzeichnis befinden. ppu im falschen Verzeichnis=C:\lazarus\fpc\3.2.2\units\x86_64-win64\rtl\system.ppu.."

I have a default FPC 32+64 install, and it works fine, but:

Code: Pascal  [Select][+][-]

1. Free Pascal Compiler version 3.3.1 [2025/06/12] for x86_64
2. Copyright (c) 1993-2025 by Florian Klaempfl and others
3. Target OS: Win64 for x64
4. Compiling xmm.pas
5. xmm.pas(236,71) Error: Identifier not found "MEM_RESERVE"
6. xmm.pas(584) Fatal: There were 1 errors compiling module, stopping
7. Fatal: Compilation aborted
8. Error: c:\pp64\bin\x86_64-win64\ppcx64.exe returned an error exitcode
9.  

EDIT: When copying system.ppu across as requested, the message goes away but then the complaint is about objpas.ppu...

That is normal, that is the "system" unit add-on for Delphi and objfpc modes.

EDIT2: When simply copying all x86-win64 ppus across to the program's output directory, the only remaining error is the undeclared identifier MEM_RESERVE.

Wwhat is specific about this code that the compiler seems to expect all ppus in the program's output directory ?

Any compilation expects the RTL to be reachable. This is normally done by the -Fu line in fpc.cfg which is done by the installer.

[paule32]

Code: Bash  [Select][+][-]

1. T:\a>grep MEM_RE *.pas
2. File windows.pas:
3.   MEM_RESERVE     = $00002000;

The current Code state: https://github.com/minifpc/miniRTL/tree/main

[marcov]

Code: Bash  [Select][+][-]

1. T:\a>grep MEM_RE *.pas
2. File windows.pas:
3.   MEM_RESERVE     = $00002000;

Which you don't USES in unit XMM.

[paule32]

@marcov:

can you provide the Command Line inclusive the options, you compile xmm.pas ?

I would be glad when CLI contains -Us and/or -Ur

Thanksfully thanks

[marcov]

Code: Pascal  [Select][+][-]

1. fpc -Ur -dDLLEXPORT xmm
2. Free Pascal Compiler version 3.3.1 [2025/06/12] for x86_64
3. Copyright (c) 1993-2025 by Florian Klaempfl and others
4. Target OS: Win64 for x64
5. Compiling xmm.pas
6. 585 lines compiled, 0.0 sec

Only change I  made is

Code: Pascal  [Select][+][-]

1. uses windows;

after the interface line.

For the release 32+64 installer I need to select the 64-bit target, so addition -P and -T lines appear:

Code: Pascal  [Select][+][-]

1. fpc -Px86_64 -Twin64 -Ur -dDLLEXPORT xmm
2. Free Pascal Compiler version 3.2.2 [2021/05/15] for x86_64
3. Copyright (c) 1993-2021 by Florian Klaempfl and others
4. Target OS: Win64 for x64
5. Compiling xmm.pas
6. 585 lines compiled, 0.4 sec
7.  

-Us is not necessary, that should only be used to compile a system unit.

[paule32]

you are sure that is all ?
I get the Output below:

Code: Bash  [Select][+][-]

1. T:\a\miniFPC\TinyFPC>fpc.exe -Px86_64 -Twin64 -Ur -dDLLEXPORT xmm.pas
2. Free Pascal Compiler version 3.2.2-r0d122c49 [2025/07/05] for x86_64
3. Copyright (c) 1993-2021 by Florian Klaempfl and others
4. Target OS: Win64 for x64
5. Compiling xmm.pas
6. Compiling windows.pas
7. Compiling objpas.pas
8. Compiling system.pas
9. system.pas(20,1) Fatal: Internal error 2016060303
10. Fatal: Compilation aborted
11. Error: C:\FPC\3.2.2\win64\fpc\bin\x86_64-win64\ppcx64.exe returned an error exitcode

Code: Pascal  [Select][+][-]

1. // ---------------------------------------------------------------------------------------
2. // Copyright(c) 2025 @paule32 and @fibonacci
3. // ---------------------------------------------------------------------------------------
4.  
5. unit system;
6.  
7. {$mode objfpc}{$H+}
8. {$modeswitch advancedrecords}
9. {$macro on}
10.  
11. // @@todo: reorder functions; interface vs implementation mismatch
12.  
13. // system.pas(9,1) Error: Internal error 2016060303
14.  
15. // IE 2006012304 means "compile system.pas first", and happens on latest trunk
16.  
17. {$WARN 6058 off : Call to subroutine "$1" marked as inline is not inlined}
18.  
19. interface  // <-- this is line 20 in system.pas

[marcov]

Yes, standard FPC 32+64 install.  RTLs are by default never recompiled, so that is on you. To my knowledge the System unit must always be compiled separately with -Us.

[paule32]

okay...
after some fruggle work, it seems that I had did done.
The FPC output follows.
Is it possible to presume the Warning's and Note's that appear during the compile ?

Code: Bash  [Select][+][-]

1. T:\a\miniFPC\TinyFPC>fpc.exe -Px86_64 -Twin64 -Us -Ur -dDLLEXPORT system.pas
2. Free Pascal Compiler version 3.2.2-r0d122c49 [2025/07/05] for x86_64
3. Copyright (c) 1993-2021 by Florian Klaempfl and others
4. Target OS: Win64 for x64
5. Compiling system.pas
6. objects.inc(330,3) Note: Local variable "vmt" not used
7. objects.inc(690,10) Warning: Function result does not seem to be set
8. objects.inc(725,10) Warning: Function result does not seem to be set
9. strings.inc(120,3) Note: Local variable "idx" is assigned but never used
10. strings.inc(210,10) Warning: Function result does not seem to be set
11. strings.inc(526,47) Warning: function result variable of a managed type does not seem to be initialized
12. strings.inc(720,10) Warning: Function result does not seem to be set
13. strings.inc(817,10) Warning: Function result does not seem to be set
14. unicode.inc(78,10) Warning: Function result does not seem to be set
15. unicode.inc(258,22) Warning: Arithmetic "+" on untyped pointer is unportable to {$T+}, suggest typecast
16. ustrings.inc(130,10) Warning: Function result does not seem to be set
17. system.pas(749,10) Warning: Function result does not seem to be set
18. system.pas(857,4) Warning: ASM reader switch is not possible inside asm statement, "INTEL" will be effective only for next
19. system.pas(930,3) Note: Local variable "eletype" is assigned but never used
20. system.pas(930,12) Note: Local variable "eletypemngd" is assigned but never used
21. exceptions64.inc(238,3) Note: Local variable "ex_rip" is assigned but never used
22. exceptions64.inc(239,3) Note: Local variable "except_signal" is
23. assigned but never used
24. exceptions64.inc(240,3) Note: Local variable "reset_fpu" is assigned
25. but never used
26. 10542 lines compiled, 0.1 sec
27. 11 warning(s) issued
28. 7 note(s) issued
29.                                                                                                                        
30. T:\a\miniFPC\TinyFPC>fpc.exe -Px86_64 -Twin64 -Ur -dDLLEXPORT xmm.pas
31. Free Pascal Compiler version 3.2.2-r0d122c49 [2025/07/05] for x86_64
32. Copyright (c) 1993-2021 by Florian Klaempfl and others
33. Target OS: Win64 for x64
34. Compiling xmm.pas
35. Compiling objpas.pas
36. Compiling windows.pas
37. 1532 lines compiled, 0.0 sec

[marcov]

Showing of notes and warnings depends on -v lines in the fpc.cfg.

[ALLIGATOR]

FPC [git main]

Code: Pascal  [Select][+][-]

1. C:\fpclaztrunk\fpc\bin\x86_64-win64\fpc.exe -vewnhibq -dDLLEXPORT -n -FuC:\fpclaztrunk\fpc\units\x86_64-win64\rtl xmm.pas

Code: [Select]

(1002) Target OS: Win64 for x64
(3104) Compiling xmm.pas
(1008) 585 lines compiled, 0.0 sec