Hi, Many gnulib files contain an Emacs-specific feature like the following, eg in build-aux/gitlog-to-changelog:
eval: (add-hook 'write-file-hooks 'time-stamp) write-file-hooks is obsolete since Emacs 22.1 (released June 2007), and hopefully can be removed from Emacs one day. Please replace "write-file-hooks" with "before-save-hook". (The literal replacement for "write-file-hooks" is "write-file-functions", but for adding a time-stamp like you do above, "before-save-hook" is recommended. Both replacements exist since Emacs 22.1.) Thanks!