library -lrx not found

I am trying to compile a complex code in my openSUSE 11.0 distro. The error below says -lrx is not found. Could someone tell me which library is this and where it can be obtained, either rpm or source code?

I have tried to use both GNU’s compilers ie gcc and gfortran 4.3 as well as Intel’s compilers (version 10.1.017).

/usr/lib/gcc/i586-suse-linux/4.3/…/…/…/…/i586-suse-linux/bin/ld: cannot find -lrx
collect2: ld returned 1 exit status
make[4]: *** [ncl] Error 1


It seems that it is an old GNU regexp library.
Here is some info about the library: Rx - Free Software Directory - Free Software Foundation
and here is the source: