[Discuss-gnuradio] Does anyone have 'timestamps' working on USRP1 Receive path?

[David Knox]

Does anyone have code working that supports 'timestamps' on the receive path
for USRP1 (RFX2400)?  Is my only option to replace my USRP1's with USRP2s? 
My definition of 'timestamps' is: additional data used to mark (batches of)
samples sent over the USB bus with a measurement accuracy on the order of an
integer number of receive FPGA clocks.  

I am currently trying to get some code from CMU (
https://cgran.org/wiki/CMUmacs https://cgran.org/wiki/CMUmacs ) working
(with some kind help from George Nychis) which supports inband messaging and
that also includes such timestamps.  However, this code currently requires
an old version of gnuradio (i.e. the installation instructions at the link
start with: 'git checkout -b inband
b1f675f291e9bcae640bd6fcb6707d50951f0268').  After
bootstrapping/configuring/making/installing with this branch on Ubuntu 9.04
(Jaunty), I get the same error message whenever I try to run any of the
examples more complicated than dial_tone.py: 

address@hidden:/usr/local/bin$ python usrp_oscope.py 
Exception RuntimeError: 'maximum recursion depth exceeded while calling a
Python object' in <type 'exceptions.AttributeError'> ignored
Traceback (most recent call last):
  File "usrp_oscope.py", line 26, in <module>
    from gnuradio import usrp
  File "/usr/local/lib/python2.6/dist-packages/gnuradio/usrp/__init__.py",
line 25, in <module>
    from usrp_swig import *
  File "/usr/local/lib/python2.6/dist-packages/gnuradio/usrp/usrp_swig.py",
line 6, in <module>
    import _usrp_swig
ImportError: /usr/local/lib/libgnuradio-usrp.so.0: undefined symbol:
_ZN15gr_msg_accepter4postEN5boost13intrusive_ptrIN3pmt8pmt_baseEEE

It seems to be some kind of smart_pointer issue.  Has anyone seen anything
like this before?  If I check out and install the latest version of
gnuradio, all examples run just fine.
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