Hello When I started using GNU Emacs compiled from the emacs25 branch two issues come up consistently during Org make routine. These issues are related to changes in the next Emacs version.
[...] Compiling /home/user/repositories/org-mode/lisp/org-src.el... In org-src-font-lock-fontify-block: org-src.el:504:54:Warning: ‘font-lock-fontify-buffer’ is for interactive use only; use ‘font-lock-ensure’ or ‘font-lock-flush’ instead. [...] Compiling /home/user/repositories/org-mode/lisp/org.el... In org-fast-tag-selection: org.el:15261:47:Error: ‘add-to-list’ can’t use lexical var ‘buffer-tags’; use ‘push’ or ‘cl-pushnew’ [...] Note that the .elc files get generated just fine, I mean, the make routine finishes correctly and Org is still usable.