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 at 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 >
