Re: PDU's

[Ivan Iudice]

Hi.
Take a look at the so called “polymorphic type”.
https://wiki.gnuradio.org/index.php/Message_Passing

Ivan

> Il giorno 21 gen 2020, alle ore 17:07, sarandis. Doulgeris 
>  ha scritto:
> 
> 
> Where can i find information about PDU's. I searched the Manual I GnuRadio 
> page but i could not find anything for that topic just that some blocks use 
> PDU's

Re: GNU Radio 3.8 and Centos 7: Is it possible?

[Nick Foster]

Having been down this road a ways, I can recommend using Docker, if you
value your time and sanity.

$ docker run -ti bistromath/gnuradio:v3.8 bash -l

If you want GRC to work you'll have to do a bit of monkeying. It'll be
different for Centos because everything is, but here's

a starting point.

Nick


On Mon, Jan 20, 2020 at 7:16 PM Andrew J Wolfram 
wrote:

> Hi All,
>
> Has anyone out there been able to install GNU Radio 3.8 on Centos 7? I
> have gotten close compiling from source, but ultimately ran into a
> segmentation fault when running gnuradio-companion.  The gdb output was not
> really helpful. Frame 1 said "Cannot access memory at address 0x170e70>) at
> /usr/include/string.h". I'm guessing something is wonky with the library
> linking due to the piecemeal dependency resolution I had to do. When
> running the cmake command I get a few "Cannot generate a safe runtime
> search path for target because files in some directories may conflict with
> libraries in implicit directories" errors. Perhaps that's related. I've had
> a very difficult time installing dependencies since some of the most recent
> versions are not available via yum. I've had luck using Anaconda (conda),
> but that's contributed to the linking issues since the old version is
> installed somewhere in /usr/ and the newest version is under the Anaconda
> prefix.
>
> I got absolutely nowhere with pybombs.
>
> Is this a doomed endeavor?
>
> Thanks,
> Andrew
>

PDU's

[sarandis. Doulgeris]

Where can i find information about PDU's. I searched the Manual I GnuRadio
page but i could not find anything for that topic just that some blocks use
PDU's

Re: Constellation script

[CEL]

Hi Michel,

welcome to the mailing list.

I must admit that I don't really know what you want to do.

Can you explain it, so that doesn't know what a DMR-C4FM relay is,
understands?

I think you're referring to some GRC flow graphs, but sadly we don't
know which ones you have been looking at. So, specific links would be
very appreciated.

Best regards,
Marcus

On Mon, 2020-01-20 at 17:41 +0100, michel slepoukha wrote:
> Hello all!
> I designed in 2018 the DMR-C4FM relay from Albi (Tarn), F5ZLH
> it works…
> Well, not that good, because we noticed  a poor signal quality:
> 
> 
> with the constellation, on a portable equipment such as the Rpi 4. we will 
> beable to adjust the relay settings
> And there only GNURadio is installed correctly and worked perfectly with an 
> RTL-SDR key.
> But most of the flow chart examples use logical signal sources and if some of 
> them have an RTL-SDR key as input, they are either incomplete or with errors 
> (wonder if this is not done expressly?) . And above all, no script linked to 
> the flow chart concerned.
> So, I can only turn to the competence of your team to finally have this 
> script validated.
> Configuration is simple: SDR-RTL → constellation
> With thanks for help
> Mike
> 


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Guidance on channel separation (was: Discuss-gnuradio Digest, Vol 207, Issue 21)

[CEL]

Dear Faisal,

first piece of guidance: write good emails; the email you answered to
literally says:

On Mon, 2020-01-20 at 22:38 +0500, Faisal Khan wrote:

> > When replying, please edit your Subject line so it is more specific
> > than "Re: Contents of Discuss-gnuradio digest..."

So, I've changed your subject line.

Anyway, your question is 

> I want guidance about that while receiving two channels how can i
separate those channels and records their audio in their respective
files simultaneously..

So, not quite sure what you mean here: with what are you recording?

Best regards,
Marcus


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Re: GNU Radio ABI guarantees

[CEL]

Ah, you're right: of course you *could* use a symbol introduced in
A.B.1.0 and then couldn't compile with A.B.0.0, but what I meant is
"recompiling (when a new release comes out)". 

On Tue, 2020-01-21 at 15:36 +0100, Sylvain Munaut wrote:
> > we guarantee API
> > compatibility (i.e. recompiling will never fail) for all releases that
> > have the same A.B.
> 
> Huh really ?
> 
> I thought it was more like within the same A.B, if it builds with C0,
> it will build for any C1 >= C0.
> 
> Cheers,
> 
> Sylvain


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Re: GNU Radio ABI guarantees

[Sylvain Munaut]

> we guarantee API
> compatibility (i.e. recompiling will never fail) for all releases that
> have the same A.B.

Huh really ?

I thought it was more like within the same A.B, if it builds with C0,
it will build for any C1 >= C0.

Cheers,

Sylvain

Re: GNU Radio ABI guarantees

[thomas]

Great, thanks!

I think this GREP should all be done on a second digit change, so when
I have some more time I'll update it accordingly.

On Tue, 21 Jan 2020 10:12:46 +, "Müller, Marcus (CEL)"
 said:
> Hi Thomas,
>
> as Nate wrote: we guarantee ABI compatibility between Releases A.B.C.D
> that only differ in D (i.e. no relinking necessary), we guarantee API
> compatibility (i.e. recompiling will never fail) for all releases that
> have the same A.B.
>
> Best regards,
> Marcus
>
> On Mon, 2020-01-20 at 23:00 +, Thomas Habets wrote:
> > What are the ABI guarantees between GNU Radio releases?
> >
> > I'm drafting a GREP on modernizing the C++ code[1], so started wondering 
> > about this.
> >
> > If a minor release, once released, only gets backported fixes from master, 
> > then this should not be an issue.
> >
> > [1] https://github.com/gnuradio/greps/pull/19
> >
>

Re: GNU Radio ABI guarantees

[CEL]

Hi Thomas,

as Nate wrote: we guarantee ABI compatibility between Releases A.B.C.D
that only differ in D (i.e. no relinking necessary), we guarantee API
compatibility (i.e. recompiling will never fail) for all releases that
have the same A.B.

Best regards,
Marcus

On Mon, 2020-01-20 at 23:00 +, Thomas Habets wrote:
> What are the ABI guarantees between GNU Radio releases?
> 
> I'm drafting a GREP on modernizing the C++ code[1], so started wondering 
> about this.
> 
> If a minor release, once released, only gets backported fixes from master, 
> then this should not be an issue.
> 
> [1] https://github.com/gnuradio/greps/pull/19
> 


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