This was originally reported and fixed in bug 1176547. The bug was fixed in package emacs-24.4-6.fc21 but recent update emacs-24.5-1.fc21 introduces the bug again. Description of problem: Running M-x grep in F21 gives a warning message from grep: grep: warning: GREP_OPTIONS is deprecated; please use an alias or script Version-Release number of selected component (if applicable): emacs-24.5-1.fc21 How reproducible: 100% Steps to Reproduce: 1. M-x grep 2. : Actual results: grep: warning: GREP_OPTIONS is deprecated; please use an alias or script Expected results: no warning Additional info: This should be already fixed upstream in http://git.savannah.gnu.org/cgit/emacs.git/commit/lisp/progmodes/grep.el?id=2e4c2fe2787785a421f256541de642976e9bd90b
scm-commit for F21 https://lists.fedoraproject.org/pipermail/scm-commits/Week-of-Mon-20150504/1572359.html
emacs-24.5-2.fc21 has been submitted as an update for Fedora 21. https://admin.fedoraproject.org/updates/emacs-24.5-2.fc21
*** Bug 1220215 has been marked as a duplicate of this bug. ***
emacs-24.5-2.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.