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To respond to your original mail:
- "make" itself does not clobber files maintained by apt-get or others. Be restful, and try it. You will be unnecessarily limiting your choices if sticking to LuaRocks only (also, LR might not have the latest versions of all the modules)
- don't do "make install". Study the Makefile, and copy necessary files (.so and maybe some .lua) to the appropriate folders. You can even have them under your user account root, say ~/lua and make LUA_PATH and LUA_CPATH point there. The mechanism is easy and efficient.
Having re-read the mail, I realize the "microcomputer" isn't the one showing the graphics. Therefore, let me change my recommendation to IUP / LuaGnome (though I've used neither). Cairo alone does not have event handlers, which would be needed for interaction with the graphics. If it were output only, Cairo itself is more than enough. 

Personally, I will be going the SVG + JavaScript road on such.

-asko


Dave Smead kirjoitti 4.5.2009 kello 8:15:


Greetings,

I'm a Lua newbie, but a programmer of many years using C and Python.
I've used Linux exclusively since 1994, Debian most of that time and
presently using Ubuntu 8.10.

At the moment I'm still having some difficulties getting Lua packages
installed because I'm not up to speed on luarocks yet.  I'm a little
hesitant to download packages outside the luarocks mechanism because I'm 
painfully aware that grabbing a tar.gz file and running make will
sometimes clobber library versions that are used by programs obtained
via apt-get, (that is make a mess that is difficult to clean up).
My immediate interest is using Lua to access graphics primitives such as draw-line, draw-circle, draw-arc, etc. I see there are bindings to SDL, opengl, wx, tk and others. While I need some gui widgets, mostly I need widgets that represent analog meters, and trend graphs, (plots). I have 
C code from the 1980's that ran on DOS with a primitive vgalib so
primitive is fine for what I need.

Can anyone offer opinions of which graphics library would be best
suited?

The graphics rendering program will run on a Linux machine, but I want
to connect it via a TCP socket to a very small microcomputer that tells 
the rendering program what to draw using ASCII strings, or better yet,
by passing a Lua table to the rendering program.

Thanks in advance for any words of wisdom.


David Smead
www.amplepower.com