Error while linking TAChart
lazarus / 12-Debugger

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mm7 · 2025-08-31 19:04

I am working on project for quite a long period. All was Ok.
But starting from recent Rebuild throws errors.

Warning: linker: /usr/bin/ld: /home/mark/.lazarus/lib/TAChartLazarusPk
g/lib/x86_64-linux/gtk2/tadrawutils.o: in function `.La2':
Error: tadrawutils.pas:(.debug_info+0x528): undefined reference to
`DBG2_$SYSTEM_$$_IUNKNOWN'

Similar errors thrown for other TAChart files.

I tried build with Automatic Debugger, Dwarf2, Dwarf3, Stabs.
Nothing helps.

How to fix?

OS is Ubuntu "22.04.5 LTS (Jammy Jellyfish)"

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wp · 2025-08-31 21:22

I happen to have a VM with Ubuntu 24.04.3 LTS/gtk2. Trying to compile
and run the "ChartEditor" demo of TAChart - no issue (using
Laz4.0+FPC3.2.2, and Laz/main+FPC3.2.2).

Did you try a clean rebuild of the IDE? "Tools" > "Configure Build
Lazarus" > in the "Clean up" box check "Clean all" and "Switch to
automatic mode after building" > "Build".

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mm7 · 2025-09-01 00:22

Yes it works without debug info turned on.
Could you try with Dwarf2 or Dwarf3?

I tried to do "Tools" > "Configure Build Lazarus" > in the "Clean up"
box check "Clean all" and "Switch to automatic mode after building" >
"Build".

Build fails:
lazarus.pp(57,3) Error: Cannot find Interfaces used by Lazarus,
incompatible
ppu=/home/mark/.lazarus/lib/units/x86_64-linux/gtk2/interfaces.ppu,
package LCL

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wp · 2025-09-01 08:54

No idea what's wrong here, this should not happen. Did you break your
IDE? Exit the IDE, delete (or better: rename) your config folder
/home/mark/.lazarus, and restart the IDE - it should use default
parameters. But note that you will lose all your settings and manually
installed components this way. When the new IDE starts for the first
time make sure to keep the default debugger backend (FPDebug). Test
the issue with the new IDE

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Lutz Mändle · 2025-09-01 09:13

@mm7

If you are on Linux it can be helpful to manually delete the folders
lib and units in /home/<user>/.lazarus before you rebuild the IDE. The
Clean All build mode should do this, but sometimes is doesnt work as
expected.

Edit: fix typo.

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mm7 · 2025-09-01 12:58

Removing of /home/mark/.lazarus did not help.
I uninstalled all packages, fpc-laz, fpc-src and lazarus.
Removed libs that were left in /usr/lib/fpc/3.2.2, files in
/usr/share/fpcsrc/3.2.2
Removed /etc/fpc.cfg and /etc/fppkg.cfg
Installed fpc-laz, fpc-src and lazarus 4.
All works now.

Previously I compiled RTL and FPC packages with Dwarf3. And it was
working well till yesterday. No idea what happened. It was just linux
update.