[SOLVED] Undefined symbol: VMT_DOM_TDOMATTRDEF; compiled with Laz
1.0.12 for Win
lazarus / 34-Windows

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vrull · 2013-09-12 21:49

After upgrading Lazarus to latest stable version 1.0.12 can no longer
compile my project. It points to the last "end." statement in project
code and says
Code: [Select]XMLTreeEdit.lpr(40,1) Error: Undefined symbol:
VMT_DOM_TDOMATTRDEFEnvironment:
OS Windows 7 64 bit
Lazarus 1.0.12
FPC 2.6.2
SVN rev. 42478
i386-win32-win32/win64

Same code is compiled fine with Lazarus 1.0.12 for GTK2+ on Ubuntu. It
compiled on Lazarus versions 1.0, 1.0.2, 1.0.6 with no problems in
both Windows and Linux/GTK2+ before.

Any ideas?

Edit: Search for "VMT_DOM_TDOMATTRDEF" in C:\lazarus folder did not
reveal any files with this content, while in Ubuntu there were three
of four binary files with this sub-string inside. Is this something
made obsolete?

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marcov · 2013-09-13 13:54

VMT_DOM_TDOMATTRDEF is probably he VMT (Virtual Method Table) of the
TDomAttrDef class of the DOM unit. (in the FPC FCL-XML unit)

It might be a problem with the internal linker, try if adding -Xe to
the switches helps.

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vrull · 2013-09-20 00:09

Thanks for the suggestion, but -Xe option did not help.
I tried to compile with option "Show all" and there is the result
(although I cannot get use of it):
Somewhere, close to the end of huge output, it says:
Code: [Select]Debug: Writing output file
C:\Projects\lazarus\XMLEditor\xmltreeedit-
code\lib\i386-win32\XMLTreeEdit.or...
Debug: Output file C:\Projects\lazarus\XMLEditor\xmltreeedit-
code\lib\i386-win32\XMLTreeEdit.or written
Debug: Time elapsed: 0.20 seconds
Debug: Cleaning up
Searching file C:\Projects\lazarus\XMLEditor\xmltreeedit-
code\lib\i386-win32\C:\Projects\lazarus\XMLEditor\xmltreeedit-
code\lib\i386-win32\XMLTreeEdit.o... not found
Searching file C:\Projects\lazarus\XMLEditor\xmltreeedit-
code\lib\i386-win32\XMLTreeEdit.o... found
Searching file C:\Projects\lazarus\XMLEditor\xmltreeedit-
code\lib\i386-win32\C:\Projects\lazarus\XMLEditor\xmltreeedit-
code\lib\i386-win32\XMLTreeEdit.or... not found
then hundreds of rows "Searching ... found /not found" and eventually:
Code: [Select]Reading object
C:\lazarus\fpc\2.6.2\units\i386-win32\rtl\sysinitpas.o
Number of unresolved externals in objects 515
Number of unresolved externals after static libraries 515
Number of unresolved externals after defining COMMON symbols 515
Number of unresolved externals after DLL imports 1
Undefined symbol: VMT_DOM_TDOMATTRDEF
There were 1 errors compiling module, stopping
Compilation aborted
Error: C:\lazarus\fpc\2.6.2\bin\i386-win32\ppc386.exe returned an
error exitcode (normal if you did not specify a source file to be
compiled)
The project code is below:
Code: [Select]uses
  {$IFDEF UNIX}{$IFDEF UseCThreads}
  cthreads,
  {$ENDIF}{$ENDIF}
  Interfaces, // this includes the LCL widgetset
  Forms, RegisterFormClass,
  uGlobal, uMain, uNode, uEditor, uFind, uMoveNode, uRefTree,
uOptions;

{$R *.res}

begin
  RequireDerivedFormResource := True;
  Application.Initialize;
  Application.CreateForm(TfrmMain, frmMain);
  Application.Run;
end.
The compiler points to the last line of the code above.

As I said I had no problems before Lazarus update from 1.0.6 to 1.0.12
, neither do I have them with Lazarus 1.0.12 on Ubuntu now with
exactly same project.

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Martin_fr · 2013-09-20 01:10

This error could mean (just one possibility) that you have extra ppu
or .o files.

If the symbol was moved to another source file, then it is in the new
ppu/o. But if the olrd one is still there, and is also used for some
reason, then the symbol exists twice

This symbol also exists in lazarus. A recompile "clean all" can help.

Maybe delete all ppu and all *.o files in the components/lazutils
folder, and then build again.

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vrull · 2013-09-20 03:57

Thank you very much, I've got it.
The steps were:
1. Tools -> Configure Build Lazarus -> Clean All -> Build = did not
help
2. removed everything from
C:\lazarus\components\lazutils\lib\i386-win32\
   then step 1 again = did not help
3. with my project open: Run -> Clean Up Build Files -> Clean Up and
Build = working

I intentionally left step 1. and 2. as they might contribute to the
success on step 3.

Thank you again!