LibreOffice 220.127.116.11 needs redland >=1.0.16, which provides librdf. Certainly you have installed 1.0.17 as a package. However the build system complains as: "librdf too old Need >=1.0.16" So, what?
My hackish solution is simply edit the file /usr/pkgsrc/misc/libreoffice/work/libreoffice-18.104.22.168/configure.ac
Try to find the string "with_system_redland".
Then change the "yes" to "no" for the found condition.
Then make install again.
Note: You have to repeate the edition after a certain "make clean" or "make distclean".