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Re: [Linphone-users] gnu/linux xv webcam selfview copile without java

From: Gelonida G
Subject: Re: [Linphone-users] gnu/linux xv webcam selfview copile without java
Date: Tue, 16 Sep 2014 14:54:12 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.1.1

Perhaps this might be a constructive suggestion.

Many people like to compile linphone, quite some of them (probably more than 90%)
have absolutely no interest in recompiling the SIP grammar.

Wouldn't it be possible to change the source repositroy and the make files such, that:
- the files generated by antlr are part of the repository.
- the dependencies were setup such, that the antlr-generated files would be recompiled ONLY
 if the source files of the grammar changed.

This would allow the majority of the users to recompile linphone without having to install java and antlr.
and allow the ones trying to change the sip grammar to still recompile it if they have installed java/antlr

Whether this is something automatic, whether there is a separate repository for the gnerated grammar files, whether
this is a command line switch during the ./configure phase or whether done differently wouldn't matter, but the idea of being able to compile
linphone even if antlr / java is not installed sounds to be a good idea.

When I first tried to compile linphone (under windows) I needed quite some time till my first successful build.
(Also tricky to keep all dependencies always up to date)

I still didn't succeed to build linphone on Linux. There was always one package that wasn't the right version.

On 09/16/2014 12:24 PM, BIENKOWSKI Guillaume wrote:
Hello Sylvain,

This is not a joke at all. The SIP protocol is (like all network protocols) based on a "formal grammar", which is described in an IETF RFC here:
I would suggest you read this RFC from start to end and possibly some related materials:

Writing a protocol parser is not as simple as it seems, and ANTLR is a tool that eased the work tremendously (on top of making it reliable and testable).
Also, Java is required for COMPILATION, and not for RUNTIME (you'll see that installing belle-sip from your favorite package manager in linux doesn't pull the entire Java runtime).

There are plenty of other alternatives to ANTLR, some of them not even in interpreted languages: 
Finally, let me remind you that bellesip and linphone are open source projects, and if you want to keep your computer Java-free, feel free to propose a patch removing the Java dependency.


On Tue, Sep 16, 2014 at 11:36 AM, Sylvain BERTRAND <address@hidden> wrote:

Is that a joke? You need to install java and java software to
compile a linphone stack?? Please remove all non-C components
from your SDK (at least for the C/GTK+ client SDK).

SIP grammar?? What is happening to this protocol?? It's supposed
to be minimal and simple.

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