Missing pwl library?

[David Doria]

I am trying to build gcc. Configure seemed to finish successfully. Now
when I run 'make', I get:

configure: error: cannot compute suffix of object files: cannot compile
See `config.log' for more details.

The only thing that looks out of place in config.log is:

cannot find -lpwl

I googled for -lpwl and pwl but I didn't find anything. What is this
library/where can I get the source to build it?

Thanks,

David