Centos 7.2 configure error (on custom --ipt-inc=)

[s90]

Hi,

I get an error during the execution of the configure script:

Kernel version: 3.10.0-327.3.1.el7.x86_64 (requested)
Kernel sources: /lib/modules/3.10.0-327.3.1.el7.x86_64/build (found)
Checking for presence of include/linux/llist.h... Yes
Checking for presence of include/linux/grsecurity.h... No
Iptables binary version: 1.4.21 (detected from /usr/local/iptables/sbin/iptables)
pkg-config for version 1.4.21 exists: No
Checking for presence of xtables.h... Yes (using ipt-inc)
Checking iptables sources version: 1.4.21 (ok)
Iptables include flags: -I/usr/local/iptables-1.4.21/include/ (user specified)
Iptables module path: /usr/local/iptables/lib/xtables
/usr/local/iptables-1.4.21/libxtables (from iptables binary)
Searching for net-snmp-config... Yes /bin/net-snmp-config
Searching for net-snmp agent... Yes.
Checking for DKMS... Yes.
! You are already have module installed via DKMS
!   it will be uninstalled on 'make install' and
!   current version of module installed afterwards.
! Use --disable-dkms option if don't want this.
Creating Makefile.. sed: -e expression #1, char 526: unterminated `s' command
done.

  If you need some options enabled run ./configure --help
  Now run: make all install

Doesn't work for me only under a new version of Centos linux OS:
CentOS Linux release 7.2.1511 (Core)

[aabc]

./configure --ipt-lib=/usr/local/iptables/lib/xtables

[aabc]

Probably, I can improve heuristics too...

[aabc]

Now git head version should work even w/o --ipt-lib=.