I have installed Lazarus on a Raspberry Pi4B running bookworm 64 bit operating system.
I first tried to use fpcupdeluxe to do it but it fails miesrably with a linker error when building fpc.
So then I decided to try the following:
1) Use apt install fpc to getb the latest 3.2.2 compiler installed.
2) Retrieve the Lazarus 2.2.6 sources from GitLab
3) Then run the make clean && make bigide inside the Lazarus source dir
4) Finally create the $HOME/.local/share/applications/lazarus_2.2.6.desktop launcher file

This succeeded and after I had created the desktop file for Lazarus in step 4 it appeared in the RPi4 main menu under Programming.

But when I started it it complains about not finding fppkg.cfg and sure enough there is no such file to be found, at least not in the locations I have seen before.

So apparently it has not been created or is in some obscure loication not known by me.

My Lazarus resides in $HOME/devtools/lazarus/2.2.6 and fpc has been placed in /usr/bin/fpc.

But I cannot find a file named fppkgh.cfg whereever I look...

What to do now?

Lazarus runs and I can add IDE packages and rebuild Lazarus just fine but whenever it starts up it shows the dialog requesting the location of fppkg.cfg...

I wonder, isn't this somehow related to writing permissions on your system?

I can't help much because I use Windows here, but that's the content of my fppkg.cfg file (located in fpcsrc\utils\fpcmkcfg):

[Defaults]
ConfigVersion=4
LocalRepository=%LocalRepository%
BuildDir={LocalRepository}build/
ArchivesDir={LocalRepository}archives/
CompilerConfigDir=%CompilerConfigDir%
RemoteMirrors=https://www.freepascal.org/repository/mirrors.xml RemoteRepository=auto
CompilerConfig=default
FPMakeCompilerConfig=default
Downloader=FPC

I installed it using the standard Windows installer.

On my Manjaro linux the file in question are located in two places:

[john1 at manjaro lazarus]$ locate -i? fppkg.cfg
*/etc/fppkg.cfg*

*... with this contrent*

**

*
*

*/usr/lib/fpc/src/utils/fpcmkcfg/fppkg.cfg*

Perhaps this command tells you more?

[john1 at manjaro lazarus]$*./lazarus --setup*
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None of these locations exist on my device.
However, Lazarus works (built from sources) as does fpc (installed via apt)

The only problem ius that I get this annoying pop-up every time I start Lazarus...

Perhaps this command tells you more? [john1 at manjaro lazarus]$*./lazarus --setup*

What is that supposed to do? I don't want to run an unknown command after spending so much time finally getting Lazarus working...

NOTE: ffpkg seems not to be a recognized command...

And the file I found here is also not accepted:
https://forum.lazarus.freepascal.org/index.php/topic,60994.msg457678.html#msg457678

Bo Berglund wrote

2) Retrieve the Lazarus 2.2.6 sources from GitLab

IIRC, the fppkg check has been by-passed by Laz 3.0. So, please try to install the RC2 of v3, or a wait a short time until the final version will be released.
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OK, will wait then.

Or rather, I downloaded the 3.0.RC2 sources and built another Lazarus on the RPi4. This was different, no longer the ask for the fppkg.cnf file!

So I guess I can let that issue rest for now.