Install on Ubuntu 11.10
- 1 In General
- 2 Ubuntu 11.10 (Oneiric Ocelot)
- 3 Ubuntu 10.04 LTS (Lucid Lynx)
- 4 See also
To install Lazarus you install three things:
- fpc - the Free Pascal compiler
- fpc-src - the source code for Free Pascal
- Lazarus -the IDE for Free Pascal
You must install the correct version of Free Pascal for the version of Lazarus you choose. The versions below are correct.
Ubuntu 11.10 (Oneiric Ocelot)
What you want
Matching versions of Lazarus and Free Pascal are in the repository (20/02/12). They are
- Lazarus 0.9.30-2.
- Free Pascal 2.4.4
In Synaptic they are called Lazarus 0.9.30-2Build1, fpc, and fp.
Find and install the packages
In the Software Centre search for and install:
- IDE for FreePascal - SDK metapackage - search under lazarus
- Free Pascal - SDK metapackage - search under fpc
- FreePascal - SDK source code metapackage- search under fpc
With Synaptic, install everything beginning with Laz, fpc or fp.
Once you have installed Lazarus, it will not work. Even if you add no code at all and compile and run everyone's favourite 'Blank form' project (having first saved it of course) you will get this error message:
Project project1 raised Exception class EInterface critical with message: ....
- Remove the taskbar
Open a terminal and try
sudo apt-get remove appmenu-gtk3 appmenu-gtk appmenu-qt
Give your password These can be re-installed if needed with the same command but put 'install' in place of 'remove'.
- Remove the Ubuntu overlay scrollbars
Open synaptic and search for 'liboverlay-scrollbar'.
Uninstall the 2 packages highlighted. They can be re-installed if needed with Synaptic
You now need to restart Ubuntu and hope.
The 'blank form' project should now run with no errors.
Add a button to your 'blank form' project. In the Events tab of the Object Inspector , try to open the 'Click' event handler. You will get the error message
unit not found: Classes
unit not found: Sysutils
Solution (10 mins): Reconfigure Lazarus as sudo
This can be solved as follows:
- Open Lazarus as sudo
Open a terminal and start Lazarus as sudo with
Give your sudo password
- Rescan the Pascal source directory
In Lazarus choose
Tools -> Rescan FPC source directory
- Rebuild Lazarus
In Lazarus choose
Tools -> BuildLazarus with profile:Build all
- Close Lazarus.
You should now be able to open Lazarus normally and create a project with a button that is clickable!'
'Hello World' here we come.
There are several threads that are useful
It's in German. It is very clear. In this case, after the installation, Lazarus ran without problem - mine didn't.
Problem 2 image
Ubuntu 10.04 LTS (Lucid Lynx)
The version in this repository is Lazarus 0.9.28.2 which is quite old. It installs via synaptic and it then works.
Install from .deb files
If you want to install a newer version using .deb files then see the wiki page