[Boost-users] How can I make the libboost_regex.a static library?

Transitioning an application from CentOS 5 to CentOS 6 and I noticed that neither the boost-devel nor boost-static rpms contain the libboost_regex.a static library. The boost-static rpm has most of the static libs but not that one. The CentOS 5 boost-devel package had the static library. I know dynamic libraries are encouraged but I still need the static lib. I grabbed the boost src rpm. I guess I need to build a custom version of the static rpm, but not sure yet which Makefile or where to make a change to get the libboost_regex.a. Thanks for any help.