I build fuppes on my computer and just want to know if plugins are loaded automatically (at startup/when needed) or if we must list them in conf file.
Take a look at src/lib/Plugins/Plugins.cpp and I think the code in that file says, search for these plugins and if they are avaliable then load them. So any plugins in there are optional. And non-optional plugins cause fuppes to crash when run. Either way no conf file settings decide that plugins get loaded at runtime. The ./configure script decides that.