Force alternate path for lib?

[Emiliano]

Hi all,

How would I go about forcing an alternate path for a libraray to be used
in my project?
For example, I have libfoo installed in /usr/local, and I have a
development version
installed in /usr/local/libfoo-dev. I have another software module that
uses libfoo;
usually I would just add a --with-libfoo option which adds $withval in
front of $LIBS
and $CPPFLAGS, but the compilation process picks up on the first lib
anyway (as shown
by ldd after compilation finished). What to do?

Emile