I've just downloaded and am building the heimdal 7.5.0 release. For what I want to do (SASL and GSSAPI) I need to compile SASL against the Heimdal libraries and headers. I've been advised that I need the heimdal-dev package. Are these libraries and headers included in the 7.5.0 build? If not, are they on the https://www.h5l.org/ somewhere, or do I have to find the dev package elsewhere?