Building postgres on Suze

I'm trying to build postgres on Suze with --with-pam, and it tells me:

/usr/lib/gcc-lib/i586-suse-linux/3.3.5/../../../../i586-suse-linux/bin/ld:
cannot find -lpam

I know it is actually installed, and disecting the configure script and
hand-compiling the test program works if I say "/lib/libpam.so.0", but
fails if I say "-lpam". Very bizarre - anyone encountered this?

I realize this is probably a suze issue and not a postgres issue, but I
hope someone here has seen this problem

Thanks in advance!
--
cg