The exact syntax is going to depend on your compiler and/or linker, but you're going to want to have it shim in /usr/local/lib to the dynamic library search path it bakes into the .so file. What you want in libs is going to be along the lines of "-R/usr/local/lib -L/usr/local/lib -lspf2" or something close. If you're using gcc in place of ld you may need "-Wl,-R/usr/local/lib" instead.
Alternately you could stick /usr/local/lib in your /etc/ld.so.conf but be aware that alters the shared library search path for everything on that system.
The cake is a lie.
The cake is a lie.
The cake is a lie.
