How to get Lazarus up and running with gtk2 in Ubuntu i386
lazarus / 1-Linux

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nspur · 2008-05-21 15:52

Have you ever noticed that when you ask a stranger for directions when
driving that they mostly assume that you know where you are anyway.
Too often "Go down the hill, turn left at the Red Lion, then up
Mangold Hill and down again and sharp right into Sheeply Bottom and
there you are". So here is a novice's guide to installing Lazarus and
getting it to use gtk2.

First use Synaptic Package Manager and open Repositories from the
Settings menu and make sure that everything is ticked on the Ubuntu
and Third Party Software tabs. This will give you the widest search
for software.

Then click the Search button and type "fpc" to search for and when the
list is shown click fpc, fpc-source and fpc-utils for installation.
Install these which are the Free Pascal Compiler.

Next, still in the package manager, search for Lazarus and click
lazarus and fcp-source (yes choose that one again) for installation.
Downloading will take some time and let it install.

At this point you will have a working Lazarus but it won't look very
pretty and will probably complain that you have not set the FPC source
code directory. Click Environment/Environment Options on the Lazarus
menu and type /usr/share/fpcsrc for the source code directory.

Now you have to tell Lazarus where the gtk and gtk2 units are because
the default installation doesn't do this. To do this you have to make
the /etc/fpc.cfg file writeable and add two lines to it. Bring up a
Terminal (Accessories menu) and type sudo -i to become the Root user.
You will need to supply your password. For the root user the prompt
sign changes from $ to #. Type cd /etc to change to the etc directory.
To make the fpc config file writeable type chmod +w fpc.cfg and hit
the Return key. Now enter the editor by typing gedit fpc.cfg.

Gedit brings up the configuration file. Page through it to find the
section that starts
# searchpath for units and other system dependent things. 
Open up two spaces under this section and type
-Fu/usr/lib/fpc/$fpcversion/units/$fpctarget/gtk
-Fu/usr/lib/fpc/$fpcversion/units/$fpctarget/gtk2
It may not strictly speaking be necessary to do this but my system
could not find the files without these lines. Save the file.

If by any chance you have lost your Root identity, assume it again
because you are going to start Lazarus as Root because it needs
superuser privileges to recompile itself and link in the gtk2
libraries. You can start Lazarus from the Applications/Programming
menu. Choose Tools and Configure Build Lazarus. You will be presented
with the Quick tab but click the Advanced one. In this panel click the
third button from the left in the list box column headers to set Clean
+ Build options for the LCL and the IDE, tick GTK2 as the option and
With Packages. Type /usr/lib/lazarus into the Target Dir box and i386
into the Target CPU one. Also tick Restart after successful build and
Confirm before rebuilding Lazarus and click the Save button. Now you
can click the Build button and the build will (should do, mine did)
happen.

Voila!

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krezix · 2008-06-03 13:58

Good One! It worked perfectly with me xD thanx