Stefan,

I did:

find `pwd` | egrep "[ao]$" >> liblistWithDuplicates.txt
then opened it and added \ to the end of each line and added those
libraries to my g++ arguments in Makefile after helloClass.o

Now, in output I get two types of errors:
multiple definition of ....
undefined reference to ...

In order to remove duplicate object file names, I wrote a short python
script which is attached,
to create liblistNoDuplicates.txt,
but still I get the same errors.


I'd really appreciate your advice.

All the Best,
Hamid


On 1/2/14, Stefan Baranoff <sbaranoff@gmail.com> wrote:
> Hamid,
>
> I do not think your attachments made it through but it looks like you are
> not linking the DPDK object files in this line:
> g++ helloClass.o
> -I/home/hamid/dpdk/dpdk-1.5.1r1/x86_64-default-linuxapp-gcc/include
> -lstdc++
>
> There would need to be many more files beyond helloClass.o listed. Try
> adding the relevant DPDK object files (I do not have the path off hand but
> I believe they are in the "build" folder) and recompiling. The files you
> need to add are those built when your build DPDK itself.
>
> This is similar to missing -lpcap if compiling against libpcap but in this
> case you need to link against object files, not a shared library.
>
> Good luck!
> Stefan
>
> Sent from my smart phone; people don't make typos, Swype does!
> On Jan 2, 2014 4:35 AM, "Hamid Ramazani" <mrramazani@gmail.com> wrote:
>
>> Hi,
>>
>> I wanted to write a simple program using class (object oriented). I've
>> attached my helloClass.cpp and also Makefile. after runnig make I get
>> below errors.
>> I think:
>> 1. it is the problem of using c code in c++
>> 2. I've used extern "C" in helloClass.cpp
>> 3. Should I recompile the DPDK from source with gcc -c argument for
>> compatibility with g++?
>>
>> Thanks in advance.
>>
>> g++ -c  helloClass.cpp
>> -I/home/hamid/dpdk/dpdk-1.5.1r1/x86_64-default-linuxapp-gcc/include
>> g++ helloClass.o
>> -I/home/hamid/dpdk/dpdk-1.5.1r1/x86_64-default-linuxapp-gcc/include
>> -lstdc++
>> helloClass.o: In function `rte_lcore_id':
>> helloClass.cpp:(.text+0x7): undefined reference to `per_lcore__lcore_id'
>> helloClass.o: In function `rte_get_master_lcore':
>> helloClass.cpp:(.text+0x15): undefined reference to
>> `rte_eal_get_configuration'
>> helloClass.o: In function `rte_lcore_is_enabled':
>> helloClass.cpp:(.text+0x2a): undefined reference to
>> `rte_eal_get_configuration'
>> helloClass.o: In function `HelloClass::HelloClass(int, char**)':
>> helloClass.cpp:(.text._ZN10HelloClassC2EiPPc[_ZN10HelloClassC5EiPPc]+0x20):
>> undefined reference to `rte_eal_init'
>> helloClass.cpp:(.text._ZN10HelloClassC2EiPPc[_ZN10HelloClassC5EiPPc]+0x4b):
>> undefined reference to `__rte_panic'
>> helloClass.o: In function `HelloClass::run()':
>> helloClass.cpp:(.text._ZN10HelloClass3runEv[HelloClass::run()]+0x3f):
>> undefined reference to `rte_eal_remote_launch'
>> helloClass.cpp:(.text._ZN10HelloClass3runEv[HelloClass::run()]+0x80):
>> undefined reference to `rte_eal_mp_wait_lcore'
>> collect2: ld returned 1 exit status
>> make: *** [helloClass.o] Error 1
>>
>>
>> All the Best,
>> Hamid
>>
>