Re: Discuss-gnuradio Digest, Vol 40, Issue 39

GNU Radio
1

Hi Eric,

As an added note to my last post, in case the gr-usrp code is not being
compiled into a shared library, I could probably create one using the
object files present. Am I right? If so, I am a bit weary of the compile
options that I would have to use.

If you could guide me on that, that would be a great help.

Thanks,
Gesly

2

On Wed, Mar 22, 2006 at 11:35:04AM -0800, Ges wrote:

Gesly
Hi Gesly,

I don’t think I saw the post you’re referencing.

In any event, gr-usrp does get compiled into a shared library. That’s
the mechanism we use to get our code loaded into python.

This fragment from gr-usrp/src/Makefile.am builds the shared lib.
The automake and libtool manuals will be helpful for decoding :wink:

ourlib_LTLIBRARIES = _usrp1.la


_usrp1_la_SOURCES =                 \
        usrp1.cc                    \
        usrp1_sink_base.cc          \
        usrp1_sink_c.cc             \
        usrp1_sink_s.cc             \
        usrp1_source_base.cc        \
        usrp1_source_c.cc           \
        usrp1_source_s.cc


_usrp1_la_LIBADD =                  \
        $(PYTHON_LDFLAGS)           \
        -lstdc++


_usrp1_la_LDFLAGS = $(NO_UNDEFINED) -module -avoid-version

Perhaps you can provide a bit more context?

Thanks,
Eric

3

Hi Eric,

The mail previous to the one below is there on the mailing list.

Anyway, what I was trying to do was try to get some code that I wrote
using the usrp1_source_c functions to work. I was trying to link with
the gnuradio-core libraries. Later I realised that these files are not
complied in the gnuradio-core library. I saw the _usrp1.so lib file in
.libs directory. But this contains all the swig related symbols in it as
well.

So, I then made a different shared library using the .o files and I was
able to link my code with it.

I was basically trying to find out if there is some shared library for
the gr-usrp code with which I could link my C++ code.

Thanks,
Gesly

Eric B. [email protected] wrote: On Wed, Mar 22, 2006 at 11:35:04AM
-0800, Ges wrote:

Gesly
Hi Gesly,

I don’t think I saw the post you’re referencing.

In any event, gr-usrp does get compiled into a shared library. That’s
the mechanism we use to get our code loaded into python.

This fragment from gr-usrp/src/Makefile.am builds the shared lib.
The automake and libtool manuals will be helpful for decoding :wink:

ourlib_LTLIBRARIES = _usrp1.la


_usrp1_la_SOURCES =                 \
        usrp1.cc                    \
        usrp1_sink_base.cc          \
        usrp1_sink_c.cc             \
        usrp1_sink_s.cc             \
        usrp1_source_base.cc        \
        usrp1_source_c.cc           \
        usrp1_source_s.cc


_usrp1_la_LIBADD =                  \
        $(PYTHON_LDFLAGS)           \
        -lstdc++


_usrp1_la_LDFLAGS = $(NO_UNDEFINED) -module -avoid-version

Perhaps you can provide a bit more context?

Thanks,
Eric

4

On Wed, Mar 22, 2006 at 08:40:13PM -0800, Ges wrote:

Hi Eric,

The mail previous to the one below is there on the mailing list.

Anyway, what I was trying to do was try to get some code that I
wrote using the usrp1_source_c functions to work. I was trying to
link with the gnuradio-core libraries. Later I realised that these
files are not complied in the gnuradio-core library. I saw the
_usrp1.so lib file in .libs directory. But this contains all the
swig related symbols in it as well.

Are you trying to use the functions in usrp1_source_c from C++?
If so, that seems a bit odd. I’d suggest using the stable and
documented interface in usrp_standard.h. usrp1_*'s only purpose in
life is to glue usrp_standard_{tx,rx} into GNU Radio. It’s a bit of a
kludge right now. However, SWIG is now supporting multiple
inheritance, so refactoring could remove all the manual proxying.

So, I then made a different shared library using the .o files and I
was able to link my code with it.

OK.

I was basically trying to find out if there is some shared library
for the gr-usrp code with which I could link my C++ code.

OK. Are you aware that there’s a separate libusrp.so that contains
usrp_standard and friends?

Eric