compile.el::grep-program - should it use egrep instead of grep?

[Jari Aalto]

There is

   (defvar grep-program "egrep" ...)

in compile.el, but in some systems the grep is the old one, which does
not provide the extended syntax. Would it be possible to set this by
default to 'egrep'? I'm not aware of any *nix OS that would not
include egrep.

Jari