> I am not personally familiar with the detailed function of the autoconf
> macros, and I can find no documentation about how OE interacts with
> those macros in order to coerce them into configuring for the target
> machine in a cross-build environment... so I am hoping the autoconf
> experts at OE can shed some light on this and at least provide some
> clues as to where to look for the problem and possible resolution.  Any
> insight you can provide in this matter would be appreciated.

Gary,

I looked at the configure logs on an x86 build and saw the same problem. 
By default the autotools.bbclass searches for m4 macros in the source 
tree. But it searches a depth that is lower than the directory depth of 
the location of testcases/realtime/m4. That seems to be causing some of 
the macros to be missing and falsely causing features to be missing.

I made this patch and it seemed to address the issue. Let me know if it 
resolves the issues you are seeing.