The Lazarus team is glad to announce the release of Lazarus 4.0.

This release was built with FPC 3.2.2.

Here is the list of changes for Lazarus and Free Pascal: http://wiki.lazarus.freepascal.org/Lazarus_4.0_release_notes http://wiki.lazarus.freepascal.org/User_Changes_3.2.2

Here is the list of fixes for Lazarus 4.x:
https://gitlab.com/freepascal.org/lazarus/lazarus/-/commits/fixes_4/

The release is available for download on SourceForge: http://sourceforge.net/projects/lazarus/files/

Choose your CPU, OS, distro and then the "Lazarus 4.0" directory.

Checksums for the SourceForge files:
https://www.lazarus-ide.org/index.php?page=checksums#4_0

Minimum requirements:

Windows:
2k, 32 or 64bit, Qt, Qt5, Qt6 (64bit only)

FreeBSD/Linux:
gtk 2.24 for gtk2, qt4.5 for qt, qt5.6 for qt5, Qt6.2 for qt6, 32 or 64bit.

Mac OS X:
Cocoa (64bit) 10.12, Carbon (32bit) 10.5 to 10.14, Qt and Qt5 (32 or 64bit), Qt6 (64bit only).

The gitlab page:
https://gitlab.com/freepascal.org/lazarus/lazarus/-/tree/lazarus_4_0

For people who are blocked by SF, the Lazarus releases from SourceForge are mirrored at:
https://download.lazarus-ide.org/
ftp://ftp.freepascal.org/pub/lazarus/releases/

Mattias

https://www.lazarus-ide.org/

Still showing version 3.8.

Site needed an update. Done

Marc

YAY! Thanks!

El 5/5/25 a les 9:24, Mattias Gaertner via lazarus ha escrit:

Here is the list of changes for Lazarus and Free Pascal: http://wiki.lazarus.freepascal.org/Lazarus_4.0_release_notes

It says:

"The IDE now comes with built-in docking and docked-form editor (they can be toggled as option, rather than rebuilding IDE to install/remove packages). When run for the first time the user will be prompted with a choice to enable them."

I enabled "Docking of ide windows" (not on first run but with tools->options) I decided I don't really like it, I disabled it but I cannot find a way do disable the docked form editor. Should I just uninstall the package (even if the release notes say it's not necessary)?

Bye

Luca Olivetti wrote

, I disabled it but I cannot find a way do disable the docked form editor. Should I just uninstall the package (even if the release notes say it's not necessary)?

Tools > Options

In the tree, under "Environment", the last node is "Docked form editor"

El 25/6/25 a les 13:12, Martin Frb via lazarus ha escrit:

Yes, but I see no option to disable it, only to change its settings:

- tab position
- resizer color
- force refreshing at sizing
- show anchors tab (and its various settings)
- colors

Bye

El 25/6/25 a les 13:26, Luca Olivetti via lazarus ha escrit:

I even manually added

<EnableDockedDesigner Value="False"/>

to dockedformeditoroptions.xml but the docked editor is still enabled.

Bye

For me, it shows a checkbox "Show the form editor as (docked) tab in the editor window (requires IDE restart".

On the very top, above the "tab position".

(Windows 10)

El 25/6/25 a les 14:13, Martin Frb via lazarus ha escrit:

You're right, I see it under windows, but not under linux (qt5).

Bye

You can always run

lazarus.exe --setup

to get the initial setup again.

But still would like to know what differs on your system, to hide that checkbox.

Then please report as a QT 5 bug.

El 25/6/25 a les 14:16, Martin Frb via lazarus ha escrit:

i tried also with gtk2, same.
However, even if the checkbox isn't visible, it should use the option in the dockedformeditoroptions.xml, shouldn't it?

Bye

El 25/6/25 a les 14:19, Luca Olivetti via lazarus ha escrit:

I found the problem: it was using the component from my old lazarus 3.2 directory, maybe some time ago I tried it and never uninstalled it? (I keep around several old versions, I copy the old one into a new directory, git pull and checkout the latest version. Since I use a different pcp directory for windows and linux that explains why it worked in windows and not in linux).

Bye

"same" as Qt or as windows?

For me gtk2 (albeit Lazarus 4.99) does show the checkbox (when the docked form is enabled, and I want to turn it off).

However, even if the checkbox isn't visible, it should use the option in the dockedformeditoroptions.xml, shouldn't it?

Yes, well have to check whatever file and node that option is stored in. Don't recall.

You mean your Lazarus compiled accross 2 install directories? Strange. (But outside of my expertise to judge what currently is expected / still bad...)

Afaik the IDE remembers for any package that you opened where it was last opened from. And then it uses that.
So if you download some package, and then download an update into a new directory, then you must open it once from that new directory, and then it will know the new location.
(Yet again, I don't know how that handles versions, in case different projects want different versions???)

And I don't know if that applied (or should apply) to build ins... If it did, technically lots of people would get an old LCL, because the opened it once from there old install?

-----------------------
You can avoid issues like that, by having different config dirs for each install.

Check the wiki for the file "lazarus.cfg"? (goes into the install dir? / or the dir in which you start "startlazarus" or "lazarus" which ever you start first)

El 25/6/25 a les 15:21, Martin Frb via lazarus ha escrit:

Yes, I usually check (after rebuilding the ide with my packages) that the loaded packages are in the "correct" directory, I forgot do do that in my linux copy (which shares the windows directory but with a different pcp)

No, that doesn't happen because, for packages inside the lazarus directory, it uses relative directories and not absolute ones (AFAIK).

----------------------- You can avoid issues like that, by having different config dirs for each install.

Yes, I already do that, in fact I keep the pcp inside the lazarus directory, so when I copy it to the new one I also copy the configuration (which is upgraded when launching the new lazarus while the old copy is still there in the old directory).

Bye