Hey all,

A few of us contributors are trying to get the nupic project building
with CMake as a prerequisite of creating a nupic.core CMake build.

We seem to have it building properly with clang, but having errors
with gcc (we have a build matrix that runs both clang and gcc). You
can see the complete build matrix here:

https://travis-ci.org/rhyolight/nupic/builds/18892797

As you can see, clang builds are fine, but gcc builds are failing
during the linking of `testeverything`.

- https://travis-ci.org/rhyolight/nupic/jobs/18892799
- https://travis-ci.org/rhyolight/nupic/jobs/18892801

The error we're getting with CMake and gcc is this:

    collect2: ld returned 1 exit status
    make[2]: *** [../../nupic-linux64/nta/eng/bin/testeverything] Error 1
    make[1]: *** [CMakeFiles/testeverything.dir/all] Error 2
    make: *** [all] Error 2
    The command "make -j3" failed and exited with 2 during install.

If anyone has any clues why this is happening, or if you have CMake
experience and would like to help debug this issue, please take part
in the discussion happening on this pull request:
https://github.com/numenta/nupic/pull/645.

Thanks,
---------
Matt Taylor
OS Community Flag-Bearer
Numenta

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