I am installing JAGS from source on Slackware64 14.2. I extracted the file to /tmp/jags. As root, I moved to the folder created and ran
It all seemed to work.

In R, I am trying to install rjags now. The installation fails with

That's probably because JAGS is in /usr/local/lib/JAGS instead of lib64, where R seems to be looking.

I did add /usr/local/lib to /etc/ld.so.conf (that was advice from JAGS docs), but R still keeps looking for JAGS in lib64, so I figure it's best to just put it there.

How can I direct the installation of JAGS to /usr/local/lib64, instead of /usr/local/lib? The JAGS directory has Makefiles, config.___, configure, and install-sh and I don't know which one tells JAGS to create the lib in .../lib and not .../lib64. Can I just add an attribute to "configure" or "make" to say where JAGS should rest once installed? For example or something like that? If I can, how exactly should it read?

I don't know how JAGS works, but from the general knowledge I would propose to install it as an R package, or configure JAGS with a certain prefix (./configure --prefix=USR_LIKE_PATH) and install it into a some subdirectory of your home, and then add your newly created libdir into LD_LIBRARY_PATH.

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@taoun, thanks for your suggestion. R requires JAGS installed before the rjags package can be in installed in R, so I had to get JAGS installed first. I have more than one user on this computer and I wanted both to available for the system. Your solution works for one user and I'm sure there is a way to make that available so other users can apply it, but I thought a more general installation would just be easier.

@dugan, Thanks!!