Something
public text v1 · immutableIriX64@FthrNtr ~/source/brlcad
$ ./autogen.sh
INTERNAL ERROR: 'sed' command is required
IriX64@FthrNtr ~/source/brlcad
$ sed --version
GNU sed version 4.1.5
Copyright (C) 2003 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE,
to the extent permitted by law.
IriX64@FthrNtr ~/source/brlcad
$