GNU Radio Companion v3.7.0-1-g2c05acc1 python name-spaces not working

GNU Radio
1

Hello all,

I’m using Xubuntu 13.04 and compiled from 3.7git, when I try to run GRC
almost any block that uses constants from the updates name-spaces GRC
fails
with:

Value “firdes.WIN_HAMMING” cannot be evaluated:
name ‘firdes’ is not defined

or for signal source and related:

Value “analog.GR_SIN_WAVE” cannot be evaluated:
name ‘analog’ is not defined

I’m not sure where in GRC these are defined but I will continue to look
for
a fix.

Thank you
~Andrew

2

On Thu, Jul 4, 2013 at 4:58 PM, Andrew D. [email protected]
wrote:

Value “analog.GR_SIN_WAVE” cannot be evaluated:
name ‘analog’ is not defined

I’m not sure where in GRC these are defined but I will continue to look for
a fix.

Thank you
~Andrew

Have you removed all other GNU Radio versions from your machine?

Also, if these are your own GRC files, might just try typing it in
again as the state might be a bit confused after an update.

The specific cases you’ve mentioned have been tested for in the 3.7
release, so I think it’s something local and/or a confusion after an
upgrade (the latter are bound to happen).

Tom

3

I had the same problem, but realized I was using the GRC .xml
definitions
from the previous version (in /usr/local/share/gnuradio/blocks).

4

Thanks for the suggestion, I removed every trace of GNU Radio off this
machine and re-installed, it did not fix the problem. After further
investigation the problem appears to be related to another problem I
have
been having, when I would run any block using filters I would get:

ImportError: /usr/lib/libgnuradio-filter-3.7.1git.so.0.0.0: undefined
symbol: volk_32f_x2_dot_prod_16i_a

And now when I manual pull in ‘analog’ in python I get:

ImportError: /usr/lib/libgnuradio-blocks-3.7.1git.so.0.0.0: undefined
symbol: volk_64u_byteswap_u

So this link problem is what is keeping ‘analog’ undefined.

When I run ‘readelf -d /usr/lib/libgnuradio-filter-3.7.1git.so.0.0.0’ I
get:

0x0000000000000001 (NEEDED) Shared library: [libvolk.so.0.0.0]

So I think It is being linked, and when I run ‘nm -D
/usr/lib/libvolk.so.0.0.0’ I get:

00000000002d69f0 D volk_32f_x2_dot_prod_16i
00000000002d6a10 D volk_32f_x2_dot_prod_16i_a <---------------
0000000000042130 T volk_32f_x2_dot_prod_16i_get_func_desc

So I think libvolk exports it ( although i’m not sure why the ‘D’ is
there
).

What else could I check to see why VOLK functions are not getting
linked?

Thank you
-Andrew

On Thu, Jul 4, 2013 at 5:17 PM, Stephen Harrison

5

OK, it appears a previous install hid an extra libvolk in
/usr/lib/x86_64-linux-gnu, removing that everything is working well so
far,
thank you for the help everyone.

-Andrew

6

On Fri, Jul 5, 2013 at 6:31 PM, Andrew D. [email protected]
wrote:

ImportError: /usr/lib/libgnuradio-blocks-3.7.1git.so.0.0.0: undefined

-Andrew
Ok, that clears up the import error. Have you just tried running
‘ldconfig’ to see if that fixes your linking problems?

Tom