> > > > There isn't any 'chunk.xsl' in the entire source tree. > > Am i missing something ? > > Yes, you're missing a docbook installation. > > https://gcc.gnu.org/onlinedocs/libstdc++/manual/documentation_hacking.html#doc.docbook > Yep. Thanks for the catch ! Once my doxygen build is done (18.4K graphs to process), i will give the 'doc-html-target' a try. warm regards Saifi.