Linker Problem

Dr. Yehuda Singer

Expert 1240 points

Dear all,

we develop a program which uses the Bluetooth using the SItara AM335x Starter Kit.

We get the following error message:

undefined reference to `sdp_close'
collect2: ld returned 1 exit status

The include file associated with the Bluetooth are:

#include <bluetooth/bluetooth.h>
#include <bluetooth/hci.h>
#include <bluetooth/hci_lib.h>
#include <bluetooth/sdp.h>
#include <bluetooth/sdp_lib.h>
#include <bluetooth/rfcomm.h>

Thanks in advance.

Dr. Yehuda Singer

over 12 years ago

0 Miroslav Kiradzhiyski XID over 12 years ago

TI__Mastermind 25235 points

Hi,

You have most probably not compiled the sdp.c library and when the linker is trying to find the sdp_close symbol it fails.

Make sure you compile the sdp.c file before linking.

Best regards,
Miroslav

0 Dr. Yehuda Singer over 12 years ago in reply to Miroslav Kiradzhiyski XID

Expert 1240 points

Dear Miroslav,

Thanks for your answer.

Where can I find this C library? Is not it pre-compiled?

Yehuda

0 Miroslav Kiradzhiyski XID over 12 years ago in reply to Dr. Yehuda Singer

TI__Mastermind 25235 points

Hi Yehuda,

You haven't provided information about what software package you are using. Please do.

Also please share how you are trying to compile your example - using an IDE, Makefile?

Best regards,
Miroslav

0 Dr. Yehuda Singer over 12 years ago in reply to Miroslav Kiradzhiyski XID

Expert 1240 points

Dear Miroslav

Thanks for your answer.

I use the CCS5.3 as an IDE.

I want to create a Linux application. Therefore, I use the Cross Compiler supplied as the SDK toolkit.

THe CCS includef all the necessary include file(see my first Email).

Best regadrs.

Yehuda

0 Miroslav Kiradzhiyski XID over 12 years ago in reply to Dr. Yehuda Singer

TI__Mastermind 25235 points

Hi,

Which version of the SDK are you using? I'm not able to find all of the header files you are using in the include/net/bluetooth/ linux folder, part of SDK vesion 06.00.00.00. Perhaps you are using an older version of the SDK?

Also did you follow this guide? http://processors.wiki.ti.com/index.php/Code_Composer_Studio_v5_Users_Guide#Creating_a_New_Project

Best regards,
Miroslav

0 Dr. Yehuda Singer over 12 years ago in reply to Miroslav Kiradzhiyski XID

Expert 1240 points

Dear Miroslav

Thanks for your answer.

I followed the guide and the compilation stage succeeds.

We use the ti-sdk-am335x-evm-05.07.00.00-Linux-x86-Install

Best regards,

Yehuda

0 Miroslav Kiradzhiyski XID over 12 years ago in reply to Dr. Yehuda Singer

TI__Mastermind 25235 points

And how about the linking after the compilation? Is it OK now?

Best regards,
Miroslav

0 Dr. Yehuda Singer over 12 years ago in reply to Miroslav Kiradzhiyski XID

Expert 1240 points

Dear Miroslav

The linker problem exists.

Yehuda

0 Miroslav Kiradzhiyski XID over 12 years ago in reply to Dr. Yehuda Singer

TI__Mastermind 25235 points

Hi Yehuda,

I found the shared libraries inside <SDK_folder>/linux_devkit/arm-arago-linux-gnueabi/usr/lib/ and the one you are looking for is libbluetooth.so.

If you do:

readelf -s <SDK_folder>/linux_devkit/arm-arago-linux-gnueabi/usr/lib/libbluetooth.so

you will find the sdp_close symbol:

149: 0000dac4 80 FUNC GLOBAL DEFAULT 10 sdp_close

You need to provide a path to the shared library for the linker in your project. Open your project properties, go to C/C++ Build, then Settings, then under Tool Settings expand Cross GCC Linker and go to Libraries. Add the path to the folder containing the shared libraries under Library Search Path and then go to Shared Library Settings under Cross GCC Linker and tick the "Shared" box.

Please post if this works for you.

Best regards,
Miroslav

0 Dr. Yehuda Singer over 12 years ago in reply to Miroslav Kiradzhiyski XID

Expert 1240 points

Dear Miroslav

Thanks.

It helped.

Yehuda

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Linker Problem