I'm trying to compile ASC (Advanced Strategic Command). Why compile it? To gain experience and for fun.

I'm running slackware 13.1.

So I do ./configure, & then it says that it needs LUA 5.1. So I get LUA, do make linux & then make install, and the LUA program is there (I can run it), as well as an empty directory called /usr/local/lib/lua/5.1. But ASC still says the same thing as before:

ASC requires the LUA 5.1 library. If you have a distribution supplied LUA 5.1 package installed, perhaps the LUA 5.1-devel package is missing.
If your distribution does not include the LUA 5.1 library, you can get it from http://www.lua.org/

Thinking that the problem might be because a library was required, I followed some links on the lua site, downloaded a file called lua5_1_4_linux26_lib.tar.gz. I moved the files from the tar to the empty directory. Still no luck.

I'm assuming the 26 in linux26 refers to version 2.6, which is the kernel I'm using.

I'd appreciate any help.

I would guess it's an issue with pkg-config, and the fact that you installed lua into /usr/local.

What's the output of the following command?You could rebuild and reinstall lua using "--prefix=/usr", which should fix the issue, or add /usr/local/lib/pkgconfig to PKG_CONFIG_PATH (maybe in /etc/rc.d/rc.local or add another script in /etc/profile.d).

Or there is a SlackBuild for lua:
http://slackbuilds.org/repository/13.1/development/lua/

Another option is to use prebuilt packages from a distribution like Salix that's Slackware compatible:
http://salix.enialis.net/

echo $PKG_CONFIG_PATH

results in:

/usr/local/lib/pkgconfig:/usr/lib/pkgconfig