In GNU EMACS 24.3, I use recentf to show the recently opened files. I would like to keep certain makefiles so that I do not have to type the whole path whenever I want to switch projects.
Is it possible to make certain files sticky or persistent in the list ?
This is not exactly answering your question, but I think it would serve the same purpose. I bookmark the files I'm using most often.
You can read more about it here: http://www.emacswiki.org/emacs/BookMarks
but in a nutshell: C-x r m bookmarks the currently open file (works on dired buffers too). C-x r b loads the bookmarked file with word completion.