Linux programmers: Help!

[Joe_Cool]

Ok, the semi-relevant background information:
I have a project I’m working on, primarily to learn to be a somewhat competent programmer. The point of this project is for me to learn how to write a program with a GUI, and the toolkit I’ve chosen to use is GTK+ with the GTK-- (GTKmm) wrapper for C++.

Now I’m going through the documentation and introduction to gtkmm at http://www.gtkmm.org/gtkmm2/docs/tutorial/html/ch03.html. I put in the basic, basic sample program, and everything compiled fine. But when I try to run it, I get this error:

./gtktest: error while loading shared libraries: libgtkmm-2.0.so.1: cannot open shared object file: No such file or directory

Now I know the file is there, because I spent a couple hours last night compiling and installing packages to be sure gtkmm-2.0 is installed properly, and a quick ‘find’ reveals that libgtkmm-2.0.so.1 is located in /usr/local/lib/, exactly where you might expect it to be.

Now I’m pretty strong at configuring unix, networking, installing systems and packages, troubleshooting, and shell and very basic c/c++ programming, etc, so I’m not a complete newbie, and can understand a technical answer. But I’m in the dark with this whole aspect of it.

How do I tell my system that the file is present, where to find it, and that it should be used?

As a side question, how would I link the libraries in statically (just a curiosity, since I do want to use dynamic linking)?

[fauxpas]

well first of tell your computer by going to regedit and changing the name of one the programs files or for a more better resul create a new file and call it (program name) syntax code for entering and using. WALLAH!

[Joe_Cool]

I have no idea what you just said. Sounds like marketing advice from Mousebat, Follicle, Goosecreature, Ampersand, Spong, Wapcaplet, Looseliver, Vendetta, and Prang.

The NOW program!

[sweepkick]

Hmm… what happens if you set the LD_LIBRARY_PATH environment variable to /usr/local/lib?

[Derleth]

*Originally posted by fauxpas *
**well first of tell your computer by going to regedit and changing the name of one the programs files or for a more better resul create a new file and call it (program name) syntax code for entering and using. WALLAH! **

Linux doesn’t have a registry or anything like a registry. Your comments may be appropriate in a MS-Windows environment, but not in Linux.

BTW, the word is `viola’.

[Joe_Cool]

*Originally posted by sweepkick *
**Hmm… what happens if you set the LD_LIBRARY_PATH environment variable to /usr/local/lib? **

What happens? Why, the program works. Thanks much. I knew it’d be something simple like that.

By any chance, do you know what the default path is? Is it just /usr/lib or is there more to it?

[friedo]

Try adding /usr/local/lib to /etc/ld.so.conf and re-running ldconfig. That should add the new libraries to your linker permanently.

[Some_Guy]

*Originally posted by Derleth *
**Linux doesn’t have a registry or anything like a registry. Your comments may be appropriate in a MS-Windows environment, but not in Linux.

BTW, the word is `viola’. **

It is actually ‘voila’ .

Oh, and just to actually add to the topic, you should also make sure that all library files, and the directories you store them in, have appropriate permissions - it’s not enough for the permissions on your executable to be correct. Just a note for the future; doesn’t sound like you need it now.