Hi Xi,
> egrep and fgrep have been deprecated for a long time, and the next grep
> release will emit a warning if egrep or fgrep is invoked:
>
> https://git.savannah.gnu.org/cgit/grep.git/commit/?id=a951562
>
> To prevent us from a lot of these warnings in the future, we should stop
> using egrep and fgrep. These patches will remove most of the use of
> egrep or fgrep from GCC building system. The remaining:
please remember that there's a world outside of GNU grep: e.g. Solaris
/bin/grep doesn't support grep -E (while /usr/xpg4/bin/grep does), so
unconditionally replacing egrep with grep -E in several places is likely
to break at least the Solaris build.
Please see the autoconf manual for details. I suspect you'll have to
rework the patch set to use AC_PROG_EGREP and $EGREP instead.
Rainer
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Rainer Orth, Center for Biotechnology, Bielefeld University
