The images folder of the Lazarus-main installation now contains a variety of general-purpose icons. They can be used for toolbar, menu and button images in any Lazarus application. Since they come in various sizes they are fully compatible with the scaled image list of Lazarus v2.0 and later:

- 16x16, 24x24 und 32x32 pixels for "small" images, and
- 24x24, 36x36 and 48x48 for "medium" sized images, and
- 32x32, 48x48 and 64x64 for "large" images.

In total, the folder currently contains about 100 motives, with some more in the queue.

The images were kindly provided by Roland Hahn who already had designed most of the icons currently used by the IDE. The license is Creative Commons CC0, i.e. the images can be used freely without any restrictions, not even attribution is requested (although Roland would certainly be glad to be acknowledged).

There is also a html preview page which is generated by the new IconList utility in the tools/icons_to_html directory. For those who don't use git, a snapshot of the imag

Dear Free Pascal Community,

The Free Pascal Developer team is pleased to finally announce the addition of a long awaited feature, though to be precise it's two different, but very much related features: Function References and Anonymous Functions. These two features can be used independantly of each other, but their greatest power they unfold when used together.

These features are based on the work by Blaise.ru, so thank you very much and I hope you're doing well considering the current situation.

In the following we'll highlight both features separately and then we'll take a look at using them together.

https://forum.lazarus.freepascal.org/index.php/topic,59468.0.html

Watch-eval with function calling in FpDebug

So there is at last some progress....

Started to document what is currently available: https://wiki.freepascal.org/FpDebug-Watches-FunctionEval
Martin_fr
See more:
https://forum.lazarus.freepascal.org/index.php/topic,60088.0.html

The Lazarus team is glad to announce the release of Lazarus 2.2.4.

This is a bugfix release and was built with FPC 3.2.2.

Here is the list of changes for Lazarus and Free Pascal:
http://wiki.lazarus.freepascal.org/Lazarus_2.2.0_release_notes
http://wiki.lazarus.freepascal.org/User_Changes_3.2.2

Here is the list of fixes for Lazarus 2.2.x:
https://gitlab.com/freepascal.org/lazarus/lazarus/-/commits/fixes_2_2

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

Choose your CPU, OS, distro and then the "Lazarus 2.2.4" directory.

Checksums for the SourceForge files:
https://www.lazarus-ide.org/index.php?page=checksums#2_2_4

Minimum requirements:

Windows:
2k, 32 or 64bit.

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

Mac OS X:
Cocoa (64bit) 10.12, Carbon (32bit) 10.5 to 10.14, qt and qt5 (32 or 64bit).

The gitlab page:
https://gitlab.com/freepascal.org/lazarus/lazarus/-/tree/lazarus_2_2_4

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

Since Lazarus 2.2.0 the Cocoa widget set has replaced the Carbon widgetset as default widgetset on MacOS.
Apple has officially removed Carbon from macOS since 2019.
The Lazarus team has decided to minimize the effort to support the Carbon widget set, so we can focus on stabilizing more used widgetsets.

We want to review all open bug reports for Carbon.
If the issue is also present when using the Cocoa widget set, the issue will be marked as such.
If it is not present with Cocoa the issue will be resolved with resolution "suspended".
Patches to fix such issues are still welcome, but new bug reports for the Carbon widget set are only accepted, if they contain a patch to fix it.

Help from the community with cleaning up the bug tracker is appreciated. If you test a Carbon issue with Cocoa, please leave your findings as a note in the bugtracker.

The Lazarus developers will try not to break the current Carbon widget set, but will not actively develop new features for it.

The Lazarus team is glad to announce the release of Lazarus 2.2.6.

This is a bugfix release and was built with FPC 3.2.2.

Here is the list of changes for Lazarus and Free Pascal:
http://wiki.lazarus.freepascal.org/Lazarus_2.2.0_release_notes
http://wiki.lazarus.freepascal.org/User_Changes_3.2.2

Here is the list of fixes for Lazarus 2.2.x:
https://gitlab.com/freepascal.org/lazarus/lazarus/-/commits/fixes_2_2

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

Choose your CPU, OS, distro and then the "Lazarus 2.2.6" directory.

Checksums for the SourceForge files:
https://www.lazarus-ide.org/index.php?page=checksums#2_2_6

Minimum requirements:

Windows:
2k, 32 or 64bit.

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

Mac OS X:
Cocoa (64bit) 10.12, Carbon (32bit) 10.5 to 10.14, qt and qt5 (32 or 64bit).

The gitlab page:
https://gitlab.com/freepascal.org/lazarus/lazarus/-/tree/lazarus_2_2_6

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

The Lazarus team is glad to announce the first release candidate of Lazarus 3.0.

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_3.0_release_notes
http://wiki.lazarus.freepascal.org/User_Changes_3.2.2

Here is the list of fixes for Lazarus 3.x:
https://gitlab.com/freepascal.org/lazarus/lazarus/-/commits/fixes_3_0/

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

Choose your CPU, OS, distro and then the "Lazarus 3.0RC1" directory.

Checksums for the SourceForge files:
https://www.lazarus-ide.org/index.php?page=checksums#3_0RC1

Minimum requirements:

Windows:
2k, 32 or 64bit.

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

Mac OS X:
Cocoa (64bit) 10.12, Carbon (32bit) 10.5 to 10.14, qt and
qt5 (32 or 64bit).

The gitlab page:
https://gitlab.com/freepascal.org/lazarus/lazarus/-/tree/lazarus_3_0_RC1

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

== Why should everybody (including you) test the release candidate? ==

In the past weeks the Lazarus team has stabilized the 3.0 fixes branch. The resulting 3.0RC1 is now stable enough to be used by any one for test purposes.

However many of the fixes and new features that were committed since the release of 2.2.6 required changes to the code of existing features too. While we have tested those ourselves, there may still be problems that only occur with very specific configurations or one project in a million.

Yes, it may be that you are the only person with a project, that will not work in the new IDE. So if you do not test, we can not fix it.

Please do not wait for the final release, in order to test. It may be too late. Once the release is out we will have to be more selective about which fixes can be merged for further 3.x releases. So it may be, that we can not merge the fix you require. And then you will miss out on all the new features.

== How to test ==

Download and install the 3.0 RC1.
- On Windows you can install as a 2ndary install, that will not affect your current install:
http://wiki.lazarus.freepascal.org/Multiple_Lazarus#Installation_of_multiple_Lazarus
- On other platforms, if you install to a new location you need to use --primary-config-path

In either case you should make backups. (including your primary config)

Open your project in the current Lazarus (3.0), and use "Publish Project" from the project menu. This creates a clean copy of your project.

You can then open that copy in the RC1. Please test:
- If you can edit forms in the designer
- rename components / change properties in Object inspector / Add new events
- Add components to form / Move components on form
- Frames, if you use them
- If you can navigate the source code (e.g. jump to implementation)
- Auto completion in source code
- Compile, debug and run
- Anything else you use in your daily work

The IDE can now load highlighter definition files containing textmate grammar. (mostly).

There are some items still missing
- nested grammar/language (include using a 2nd grammar) (todo)
- folding (todo)
- There is also no support for "injections" (just edit the grammar and copy the injection into the final place).

Known differences:
- The regex engine does not support the full range of operations. So some existing grammars may fail on that (or behave different).
- SynEdit does not store newlines chars => patterns matching "\n" must be changed to match "$" instead.

Please vote for our telegram channel https://t.me/free_pascal?boost

[For premium users]

The Lazarus team is glad to announce the second release candidate of Lazarus 3.0.

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_3.0_release_notes
http://wiki.lazarus.freepascal.org/User_Changes_3.2.2

Here is the list of fixes for Lazarus 3.x:
https://gitlab.com/freepascal.org/lazarus/lazarus/-/commits/fixes_3_0/

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

Choose your CPU, OS, distro and then the "Lazarus 3.0RC2" directory.

Checksums for the SourceForge files:
https://www.lazarus-ide.org/index.php?page=checksums#3_0RC2

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).

There is a problem on Macos. When upgrading from Ventura to Sonoma 13.6, debugging in the IDE often does not work, the app does not start. Running the app without debugging and debugging in the Terminal using lldb does work.
Once a solution is found I will upload a new Lazarus pkg for Macos.

The Lazarus team is glad to announce the release of Lazarus 3.0.

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_3.0_release_notes
http://wiki.lazarus.freepascal.org/User_Changes_3.2.2

Here is the list of fixes for Lazarus 3.x:
https://gitlab.com/freepascal.org/lazarus/lazarus/-/commits/fixes_3_0/

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

Choose your CPU, OS, distro and then the "Lazarus 3.0" directory.

Checksums for the SourceForge files:
https://www.lazarus-ide.org/index.php?page=checksums#3_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).

There is a problem on Macos. When upgrading from Ventura to Sonoma 13.6, debugging in the IDE often does not work, the app does not start. Running the app without debugging and debugging in the Terminal using lldb does work.
Once a solution is found I will upload a new Lazarus pkg for Macos.

The Lazarus team is glad to announce the release of Lazarus 3.2.

This is a bugfix release and was built with FPC 3.2.2.

Here is the list of changes for Lazarus and Free Pascal:
http://wiki.lazarus.freepascal.org/Lazarus_3.0_release_notes
http://wiki.lazarus.freepascal.org/User_Changes_3.2.2

Here is the list of fixes for Lazarus 3.x:
https://gitlab.com/freepascal.org/lazarus/lazarus/-/commits/fixes_3_0/

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

Choose your CPU, OS, distro and then the "Lazarus 3.2" directory.

Checksums for the SourceForge files:
https://www.lazarus-ide.org/index.php?page=checksums#3_2

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).

Note: Since Macos Sonoma (14) debugging takes some time to start the application, especially on first start.

The Lazarus team is glad to announce the release of Lazarus 3.4.

This is a bugfix release and was built with FPC 3.2.2.

Here is the list of changes for Lazarus and Free Pascal:
http://wiki.lazarus.freepascal.org/Lazarus_3.0_release_notes
http://wiki.lazarus.freepascal.org/User_Changes_3.2.2

Here is the list of fixes for Lazarus 3.x:
https://gitlab.com/freepascal.org/lazarus/lazarus/-/commits/fixes_3_0/

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

Choose your CPU, OS, distro and then the "Lazarus 3.4" directory.

Checksums for the SourceForge files:
https://www.lazarus-ide.org/index.php?page=checksums#3_4

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).

Note: Since Macos Sonoma 14 debugging takes some time to start the application, especially on first start.

The Lazarus team is glad to announce the release of Lazarus 3.6.

This is a bugfix release and was built with FPC 3.2.2.

Here is the list of changes for Lazarus and Free Pascal:
http://wiki.lazarus.freepascal.org/Lazarus_3.0_release_notes
http://wiki.lazarus.freepascal.org/User_Changes_3.2.2

Here is the list of fixes for Lazarus 3.x:
https://gitlab.com/freepascal.org/lazarus/lazarus/-/commits/fixes_3_0/

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

Choose your CPU, OS, distro and then the "Lazarus 3.6" directory.

Checksums for the SourceForge files:
https://www.lazarus-ide.org/index.php?page=checksums#3_6

The Windows installers are now code signed. The signature uses the name of the Foundation:
"Stichting Programming Free Pascal & Lazarus Foundation"

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).

Note: Since Macos Sonoma 14 debugging takes some time to start the application, especially on first start.

The Lazarus team is glad to announce the first release candidate 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 4.0RC1" directory.

Checksums for the SourceForge files:
https://www.lazarus-ide.org/index.php?page=checksums#4_0RC1

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_RC_1

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/

Why should everybody (including you) test the release candidate?

In the past weeks the Lazarus team has stabilized the 4.0 fixes branch. The resulting 4.0RC1 is now stable enough to be used by any one for test purposes.

While we have tested those ourselves, there may still be problems that only occur with very specific configurations or one project in a million.

Yes, it may be that you are the only person with a project, that will not work in the new IDE. So if you do not test, we can not fix it.

Please do not wait for the final release, in order to test. It may be too late. Once the release is out we will have to be more selective about which fixes can be merged for further 3.x releases. So it may be, that we can not merge the fix you require. And then you will miss out on all the new features.

How to test

Download and install the 4.0 RC1.
- On Windows you can install as a 2ndary install, that will not affect your current install:

http://wiki.lazarus.freepascal.org/Multiple_Lazarus#Installation_of_multiple_Lazarus
- On other platforms, if you install to a new location you need to use
--primary-config-path

In either case you should make backups. (including your primary config)

Open your project in the current Lazarus (3.6), and use "Publish Project" from the project menu. This creates a clean copy of your project.

You can then open that copy in the RC1. Please test:
- If you can edit forms in the designer
- rename components / change properties in Object inspector / Add
new events
- Add components to form / Move components on form
- Frames, if you use them
- If you can navigate the source code (e.g. jump to implementation)
- Auto completion in source code
- Compile, debug and run
- Anything else you use in your daily work

The Lazarus team is glad to announce the second release candidate 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 4.0RC2" directory.

Checksums for the SourceForge files:
https://www.lazarus-ide.org/index.php?page=checksums#4_0RC2

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_0RC2

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/

== Why should everybody (including you) test the release candidate? ==

In the past weeks the Lazarus team has stabilized the 4.0 fixes branch. The resulting 4.0RC2 is now stable enough to be used by any one for test purposes.

While we have tested those ourselves, there may still be problems that only occur with very specific configurations or one project in a million.

Yes, it may be that you are the only person with a project, that will not work in the new IDE. So if you do not test, we can not fix it.

Please do not wait for the final release, in order to test. It may be too late. Once the release is out we will have to be more selective about which fixes can be merged for further 4.x releases. So it may be, that we can not merge the fix you require. And then you will miss out on all the new features.

== How to test ==

Download and install the 4.0 RC2.
- On Windows you can install as a 2ndary install, that will not affect your current install:

http://wiki.lazarus.freepascal.org/Multiple_Lazarus#Installation_of_multiple_Lazarus
- On other platforms, if you install to a new location you need to use --primary-config-path

In either case you should make backups. (including your primary config)

Open your project in your current Lazarus, and use "Publish Project" from the project menu. This creates a clean copy of your project.

You can then open that copy in the 4.0RC2. Please test:
- If you can edit forms in the designer
- rename components / change properties in Object inspector / Add new events
- Add components to form / Move components on form
- Frames, if you use them
- If you can navigate the source code (e.g. jump to implementation)
- Auto completion in source code
- Compile, debug and run
- Anything else you use in your daily work

The Lazarus team is glad to announce the release of Lazarus 3.8.

This is a bugfix release and was built with FPC 3.2.2.

Here is the list of changes for Lazarus and Free Pascal:
http://wiki.lazarus.freepascal.org/Lazarus_3.0_release_notes
http://wiki.lazarus.freepascal.org/User_Changes_3.2.2

Here is the list of fixes for Lazarus 3.x:
https://gitlab.com/freepascal.org/lazarus/lazarus/-/commits/fixes_3_0/

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

Choose your CPU, OS, distro and then the "Lazarus 3.8" directory.

Checksums for the SourceForge files:
https://www.lazarus-ide.org/index.php?page=checksums#3_8

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).

Note: Since Macos Sonoma 14 debugging takes some time to start the application, especially on first start.

The gitlab page:
https://gitlab.com/freepascal.org/lazarus/lazarus/-/tree/lazarus_3_8

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/

The Lazarus team is glad to announce the third release candidate 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 4.0RC3" directory.

Checksums for the SourceForge files:
https://www.lazarus-ide.org/index.php?page=checksums#4_0RC3

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_0RC3

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/

== Why should everybody (including you) test the release candidate? ==

In the past weeks the Lazarus team has stabilized the 4.0 fixes branch. The resulting 4.0RC3 is now stable enough to be used by any one for test purposes.

While we have tested those ourselves, there may still be problems that only occur with very specific configurations or one project in a million.

Yes, it may be that you are the only person with a project, that will not work in the new IDE. So if you do not test, we can not fix it.

Please do not wait for the final release, in order to test. It may be too late. Once the release is out we will have to be more selective about which fixes can be merged for further 4.x releases. So it may be, that we can not merge the fix you require. And then you will miss out on all the new features.

== How to test ==

Download and install the 4.0 RC3.
- On Windows you can install as a 2ndary install, that will not affect your current install:

http://wiki.lazarus.freepascal.org/Multiple_Lazarus#Installation_of_multiple_Lazarus
- On other platforms, if you install to a new location you need to use --primary-config-path

In either case you should make backups. (including your primary config)

Open your project in your current Lazarus, and use "Publish Project" from the project menu. This creates a clean copy of your project.

You can then open that copy in the 4.0RC3. Please test:
- If you can edit forms in the designer
- rename components / change properties in Object inspector / Add new events
- Add components to form / Move components on form
- Frames, if you use them
- If you can navigate the source code (e.g. jump to implementation)
- Auto completion in source code
- Compile, debug and run
- Anything else you use in your daily work

The Lazarus team is glad to announce Lazarus 4.0.

This release was built with FPC 3.2.2.

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

The Lazarus team is glad to announce Lazarus 4.2.

This is a bugfix release and was built with FPC 3.2.2.

Here is the list of changes for Lazarus and Free Pascal:
https://wiki.lazarus.freepascal.org/Lazarus_4.0_release_notes
https://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:
https://sourceforge.net/projects/lazarus/files/

Choose your CPU, OS, distro and then the "Lazarus 4.2" directory.

Checksums for the SourceForge files:
https://www.lazarus-ide.org/index.php?page=checksums#4_2

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_2

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/