[CMake] try_compile: more verbose format wanted

[Bill Hoffman]

Steven Van Ingelgem wrote:
> There was no error generated because there was no real error ;-). Please 
> see my second mail, in that one I investigated it a little more.
> 

I did see your second email.   It is looking for those files in the 
build tree because they are marked as generated files.   Does it build 
out of source without try-compile.

-Bill