openwrt makefile for eclipse paho

[prem singhania]

Hello,
      I am trying to use eclipse paho's C client library on a openwrt system with a locally installed apollo broker. In order to run the c program in the openwrt environment, I need to first make its make file. Now I have searched a lot in internet but I did not find anything that could work on an openwrt system. So if anyone could help me with the makefile that is suitable for openwrt system, I will be highly thankful.

P.S: By suitable makefile I mean a makefile that contains the link to download eclipse paho library.

[Frank Pagliughi]

Do you have an example of another project that works the way you want?

- Frank

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[Karl Palsson]

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> On 09/17/2015 08:18 AM, prem singhania wrote:
> > Hello,
> > I am trying to use eclipse paho's C client library on a openwrt
> > system with a locally installed apollo broker. In order to run the c
> > program in the openwrt environment, I need to first make its make
> > file. Now I have searched a lot in internet but I did not find
> > anything that could work on an openwrt system. So if anyone could help
> > me with the makefile that is suitable for openwrt system, I will be
> > highly thankful.

Is there anything particularly wrong with libmosquitto? I've been
maintaining mosquitto packages for openwrt for a couple of years now,
and expect to continue doing so. If you particularly _must_ use paho
instead, then the mosquitto package makefiles should be a more than
sufficient example.

https://github.com/openwrt/packages/tree/master/net/mosquitto

> >
> > P.S: By suitable makefile I mean a makefile that contains the link to
> > download eclipse paho library.

You mean an openwrt package makefile, not a project makefile, but that's
ok.

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[prem singhania]

Thanks for the reply.
        Yes there is, I used libmosquitto library and it worked, but there were some errors which I could not understand and hence was planning to test out eclipse paho for once. You can download libmosquitto's makefile may be then you will get a better picture of what I am asking.

[prem singhania]

Thanks for the reply,actually @karl palsson, I have spent some time trying to study mosquitto library, I wrote a small independent program that just publishes messages to an apollo broker. Now here is the thing, this small program when i run in the openwrt environment, it works smoothly without any error. My team is working on another project and my work is to include mqtt support in it. This program i included in that project and there is when errors started popping out. The messages are not publishing and the broker throws different errors at different time, I have no idea where the error is, with my C code, broker or the library itself and that is why I was trying to test it out using other libraries. For your reference im attaching my C code. See if you can find any error in it.

P.S : As i said earlier, the code that i am attaching works, if you run it independently on any openwrt system(the openwrt system I am talking about is a cloudgate to be precise).

[Karl Palsson]

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If you would like help, please try describing exactly what errors you
get, in which cases. If I understand correctly,
the program attached works, but some other program you have doesn't. You need to explain _what_ doesn't work if anyone is to have any chance of helping you. Switching to paho is unlikely to help you in any meaningful way, and you would still need to be able to describe your problems.

A common trap is that you have the same clientid in multiple
applications.

Sincerely,
Karl Palsson

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[prem singhania]

I am using an apollo broker and these are the two major errors that I get when I try running the already attached program with my project's source code.
 error: Internal Server Error: java.lang.ArrayIndexOutOfBoundsException: 3 and
 error: Invalid MQTT message type: 15
            both these errors come for the same program, and sometimes no error is displayed and the message isn't published either and there is this other thing, I somehow sometimes(out of pure luck) get this program running by making some changes, but once it has started running, the program kind of becomes hard coded meaning if again I make any kind of changes on that program(say I added a new line in the program to print logs in my log file). The program will stop working again.
       I hope I made the problems clear this time, if its still not clear, please do tell ill try my best again.

Regards
Prem Singhania