Is it possible to run 2 versions of Lazarus at the same tiime?

[vfclists]

I am currently using Lazarus 0.9.26.2 for a project. I want to install the latest stable and the latest SVN versions as well.

It is possible to have all three running on the system, without interference?

Will forms and code move between them easily, especially with upwards compatibility?

[theo]

http://wiki.lazarus.freepascal.org/Multiple_Lazarus
http://www.mail-archive.com/lazarus@lists.lazarus.freepascal.org/msg03720.html

[vfclists]

Does each Lazarus version include its version of FreePascal, or do they use versions?

 I'd like to point each version to its own FreePascal if that is possible.

http://wiki.lazarus.freepascal.org/Multiple_Lazarus
http://www.mail-archive.com/lazarus@lists.lazarus.freepascal.org/msg03720.html

[Martin_fr]

You can have different FPC versions too.

The path to fpc is stored in the lazarus settings, so --primary-config-path allows you to do this.

If you install a Lazarus Snapshot (windows), then the fpc is installed inside the directory you chose at Lazarus-installation-time. And the FPC will have the correct fpc.cfg file.

If you download fpc from SVN, you also need to download the bin-utils (there is a separate SVN for that, or copy them from your other installation).
In this case you may have to look into you fpc.cfg by hand.

[thierrybo]

This is easier to use several fpc installations with Windows because you just have to put a fpc.cfg next to each fpc.exe. It is a bit more difficult on Linux (http://www.lazarus.freepascal.org/index.php/topic,8386.0.html)

[LazaruX]

If using this http://www.gobolinux.org/ Linux distribution, it should be possible

[vfclists]

I am currently using 0.9.26.2 beta, and after installing 0.9.28.2 it appears that the 0.9.28 version reverted to using the FPC 2.2.2 version that came with 0.9.26 instead of using its own FPC 2.2.4.

It appears to be using the settings in Local Settings\Application Data\lazarus directory which was created for 0.9.26.

Are the some options to give the shortcut which will get the 0.9.28 version to use its own FPC and its own IDE settings? I mean something settings passed on the command line only,  or linked with with its installation directory, or working directory, from rather than the registry or standard defaults?

I am currently using Lazarus 0.9.26.2 for a project. I want to install the latest stable and the latest SVN versions as well.

It is possible to have all three running on the system, without interference?

Will forms and code move between them easily, especially with upwards compatibility?

[Bart]

1. Use --pcp=pathtoindividualconfigpath for each lazarus shortcut
2. In each lazarus you can specify where fpc is

I have 2 Lazarus versions running on both win and linux, both with each own fpc version.

Bart

[vfclists]

1. Is the --pcp the equivalent to ~/.lazarus or %AppData%\Lazarus?

2. I see that the FPC can be selected in the IDE.
Can it be configured in the IDE as well?

1. Use --pcp=pathtoindividualconfigpath for each lazarus shortcut

2. In each lazarus you can specify where fpc is

I have 2 Lazarus versions running on both win and linux, both with each own fpc version.

[Bart]

You can set --pcp to any path you desire, as long as you have write access to it.

I have --pcp=H:\Programmas\SvnLaz\ in Windows
and
--pcp=/home/bart/.svnlaz in Linux
for my SVN versions of Lazarus.
The stable ones (one in each OS0 use their defaults.

Bart

[thierrybo]

Personally I do the opposite. I protect the stable lazarus using -pcp=lazarus-stable and I leave the svn version in the default folder. I did this because when I did as Bart, and install a lot of versions, there was always one moment  I "forgot" to set --pcp (like double click on the exe) and it mess up my stable configuration.