Hi,
In make-stds.texi [1] we read:
The @code{configure} script and the Makefile rules for building and
installation should not use any utilities directly except these:
@example
awk cat cmp cp diff echo egrep expr false grep install-info ln ls
mkdir mv printf pwd rm rmdir sed sleep sort tar test touch tr true
@end example
Now, in the next GNU grep release, egrep will warn at each invocation [2].
Because of a portability problem to Solaris 10 [3], this means that
configure script and Makefiles should better use the EGREP variable, as
determined by the Autoconf macro AC_PROG_EGREP.
In either case, I think it's now time to remove 'egrep' from the list of
usual utilities.
Opinions?
Bruno
[1] https://www.gnu.org/prep/standards/html_node/Utilities-in-Makefiles.html
[2]
https://git.savannah.gnu.org/gitweb/?p=grep.git;a=commitdiff;h=a9515624709865d480e3142fd959bccd1c9372d1
[3] https://lists.gnu.org/archive/html/bug-standards/2020-12/msg00004.html
