Broken Cross Compile with NetworkManager 1.12.0

[Matthew Starr <mstarr hedonline com>]

I am trying to compile NetworkManager 1.12.0 for armhf using an amd64 install of Ubuntu 17.10 and building 
the ARM software using buildroot.  During the configure step, I am getting the following error:

checking for /etc/sysconfig/network-scripts... configure: error: cannot check for file existence when cross 
compiling

This was not an issue with NetworkManager 1.10.8 which compiles fine with the same build environment.

I did some digging and it looks like the use of AC_CHECK_FILE in the configure.ac file will cause cross 
compile errors like this.  See the following mailing list entry from autotools:
https://lists.gnu.org/archive/html/autoconf/2000-10/msg00018.html

Best regards,
Matthew Starr