<parameter>CPPFLAGS="..." LDFLAGS="$LDFLAGS ..."</parameter>: If <application>TeXLive</application> has been installed in <filename class="directory">/opt/texlive/&texlive-year;</filename> the configure script will find <filename class='libraryfile'>libkpathsea.so</filename> and enable the DVI backend, but without this addition the compile will fail because it cannot find the required headers. Adding this to a system where <application>TeXLive</application> has not been installed does not break the build.