https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81421
--- Comment #17 from Ian Lance Taylor <ian at airs dot com> --- Thanks. I have no recommendation. I can not explain why your version of grep behaves differently than mine, and, since nobody else has reported this bug, apparently differently than everyone else's. I do notice one interesting thing, which is that earlier you said > grep --version > egrep (GNU grep) 2.4.2 On my system running `grep --version` prints grep (GNU grep) 2.16 (plus a copyright notice) and running `egrep --version` prints egrep (GNU grep) 2.16 It's interesting that on your system `grep --version` prints "egrep" rather than "grep". If your "grep" program is somehow really "egrep", that would explain the problem you are seeing. But I don't know how that could happen.
