I tried modifying the gr-osmosdr source to add the message sink in the
source_impl.cc. Turns out, we cannot have message passing in hierarchical
blocks as discussed in this post:
https://lists.gnu.org/archive/html/discuss-gnuradio/2016-01/msg00291.html
and this one:
I am trying to extend the gr-osmosdr source block with a PMT message sink
to send messages to it during runtime (to say, change the sample rate). I
intend to develop this as a part of a differnt OOT module.
How do I add such dependencies in the CMake list? (I am not very conversant
with Cmake)
