finding libraries

[Benjamin Reed]

out of curiosity, any ideas why I would get:

  -- Found PCRE: /sw/lib/libpcre.a;/sw/lib/libpcreposix.a

rather than:

  -- Found PCRE: /sw/lib/libpcre.dylib;/sw/lib/libpcreposix.dylib

There doesn't seem to be anything OS-specific in FindPCRE.cmake, I'm
not really sure why it's not finding the dylibs, since they would be
preferred.  I assume ultimately, we'd end up with -lpcre anyways, but
if there's a case where a library was built dynamic-only, wouldn't it
be missed?