configure can't find libraries

[Jim Lemon]

Hi folks,
Just tried to install PSPP and configure can't find some libraries:

configure: error: The following required prerequisites are not
installed.
You must install them before PSPP can be built:
        libplot (or use --without-libplot)
        libgslcblas
        libgsl (version 1.4 or later)

I don't really care about libplot, but I do have the others:

/usr/local/pspp-0.6.0> locate libgsl
/usr/lib/libgsl.so.0
/usr/lib/libgsl.so.0.7.0
/usr/lib/libgslcblas.so.0
/usr/lib/libgslcblas.so.0.0.0

Couldn't find anything about LIBPATH in the archives, and I've tried
adding ";/usr/lib" to a couple of library path variables, but so far no
luck. I'm pretty sure that there's some voodoo that will inform
configure where the libraries are and that some nice person will let me
in on it. Please CC to me as I haven't subscribed. Thanks.

Jim