[CMake] Additional testing of bug #4772

[Bill Hoffman]

Alan W. Irwin wrote:

> Bill, can you or someone else from Kitware take over now to finish this 
> off?
> If you don't have immediate access to Linux, I am willing to do any
> experiments you suggest on that platform.  Currently, I feel I am
> floundering around close to the solution of the problem on my own, but I
> think it will require somebody with more comprehensive CMake language
> support expertise than mine to determine a really elegant solution for this
> Platform bug that works not only for C, but also for CXX in the Linux gcc
> case.
> 
So, as you can see it is not a simple ifdef.  This could take some time 
to fix, or it might be quick. The initialization of compilers is a very 
tricky part of CMake, and changes often break things in hard to detect 
ways.  We have plenty of linux machines, just not plenty of time...   It 
is on the list of things todo.

One thing that might help you understand what is going on, is the new 
--trace option.  It will show you every statement and file cmake 
includes.

-Bill