datadir variable

[Luka Napotnik <luka napotnik gmail com>]

Hello!

When I didn't use autoconf, I loaded images with an absolute path. But
now I use autoconf and if I do make install, the path is wrong. Now I
figured out that I need to get the right path with a $datadir variable
which is in Makefile.in. How do I get that variable into my C program?

greets,
Luka Napotnik