bug#35681: grep's ./configure doesn't work with plain /bin/sh

[Miro Kropáček]

Hi,

I found this today by accident - it seems that grep's ./configure
doesn't work with so called minimal bash (enabled in bash's configure
via --enable-minimal-config).

One can verify that not only by the failed ./configure process but
also by content of config.log - there are several messages like:

configure:3536: error: fn_grep: expected pattern

Tested on the latest (3.3) version. If there are good reasons why
./configure needs full bash, I guess it shouldn't reference /bin/sh in
that case.

Cheers,
Miro