[Discuss-gnuradio] volk/cmake include preference issue

[Josh Blum]

It seems the volk library build was adding include paths for external
dependencies before adding local ones. In this case of external
dependencies like orc being installed into /usr/local, volk would be
compiling against headers that were potentially old gnuradio installs in
/usr/local

I know this caused an issue for some on freebsd (since many dependencies
go into /usr/local). And supposedly OSX in some cases as well.

Here is a potential fix, the output of make VERBOSE=1 -C volk seems to
indicate that the build includes are now listed first:
http://gnuradio.org/cgit/jblum.git/commit/?h=volk_include_order

I dont believe this is an issue for the rest of the components. It seems
that listing the build includes first was always the case and copied
into all the components.

-josh