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Re: [paho-dev] Compiling Paho C Client

Hi

Where is the paho-mqtt3c library? Not on git?

Regards
Andrew

On Thu, Oct 15, 2015 at 3:47 PM, Ian Craggs <icraggs@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
Hi,

when you run the make file, it shows what commands are used to build the libraries and samples:

cc -o build/output/samples/pubsync src/samples/pubsync.c -lpaho-mqtt3c  -I src -lpthread -L build/output

for pubsync.c for instance.  Your errors are caused by not linking to the Paho library.


Ian

On 10/15/2015 04:12 AM, Satish V Madala wrote:
Hi folks!

I have been using MQTT since many days and for the first time i have to use a C/C++ Client. Probably, there is a compiling problem with the present code at paho git (or i miss something):


git clone http://git.eclipse.org/gitroot/paho/org.eclipse.paho.mqtt.c.git
cd org.eclipse.paho.mqtt.c.git
make
make install
Make Install was succesful and I have tried the sample in src/samples directory.

gcc pubsync.c 
/tmp/ccbSD877.o: In function `main':
pubsync.c:(.text+0xf2): undefined reference to `MQTTClient_create'
pubsync.c:(.text+0x116): undefined reference to `MQTTClient_connect'
pubsync.c:(.text+0x191): undefined reference to `MQTTClient_publishMessage'
pubsync.c:(.text+0x1d1): undefined reference to `MQTTClient_waitForCompletion'
pubsync.c:(.text+0x202): undefined reference to `MQTTClient_disconnect'
pubsync.c:(.text+0x211): undefined reference to `MQTTClient_destroy'
collect2: error: ld returned 1 exit status
I got these errors. Any compilation document would be really helpful.

Am running 15.04 Ubuntu. Was running mosquitto_clients and python clients on the machine.
(Actually, I want C++ implementation, which would require this C Client installed. ) 

It seems like libraries aren't linked, but isn't it supposed to be linked by default when i make installed? 

Thanks!
With Regards,

Satish V Madala Techpreneur & FOSS Evangelist


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-- 
Ian Craggs                          
icraggs@xxxxxxxxxx                 IBM United Kingdom
Paho Project Lead; Committer on Mosquitto


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