Difference between revisions of "Install on Ubuntu 11.10"
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===Problem 1=== | ===Problem 1=== | ||
| − | Once you have installed Lazarus, it will not work. Even if you add no code at all and compile and run | + | 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: .... | Project project1 raised Exception class EInterface critical with message: .... | ||
Revision as of 20:59, 22 February 2012
In General
Overview
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
Versions
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
- 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.
Problem 1
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 These 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.
Problem 2
If you 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
Can't find class Classes
or
Can't find class Sysutils
Solution (10 mins): Reconfigure Lazarus as sudo
This can only be solved if you open Lazarus as sudo.
- Scan the Pascal source code
Open a terminal and start Lazarus as sudo with
gksudo StartLazarus
Give your sudo password
In Lazarus choose
Environment/Rescan FPC source directory
- Rebuild Lazarus.
Still as sudo - In Lazarus choose
Tools/BuildLazarus with profile:Build all
You should now be able to open Lazarus normally and create a project with a button that is clickable
'Hello World' here we come.
Oh Joy!
Lazarus Forum
There are several threads that are useful
Forgetting to install Free Pascal source code
Video
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.
