Error with libserial

[mfvpcrec]

Hello people :) , i have a question , i was compiling a program with the libserial library , and i had this error



undefined reference to `SerialPort::SerialPort(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'


I though "Well maybe i did not link the libserial library" but it was not. So i made a small program to test libserial like this



#include <iostream>
#include <SerialPort.h>

using namespace std;

int main (void)
{
SerialPort *serie= new SerialPort("A");
}


I compile with



g++ program.cpp -lserial


And i had the same error.

The error appeared when I switched from Kubuntu 15.04 to Kubuntu 15.10 and when i use the constructor of SerialPort. I installed the old version of libserial but the error still appearing, maybe i forgot install something. Someone knows what is happening?

[Rocket2DMn]

Do you have the libserial headers installed on your system? If you got libserial from the Ubuntu repos, you probably need to install libserial-dev as well.

[mfvpcrec]

Yes i installed libserialport0 libserial0 libserial-dev and libserial-dev and libserialport-dev.
The error happens when g++ tried to link the libserial library. Is like the constructor was never declared in the compiled library

[Rocket2DMn]

Hmm, I tried and get the same error. Here's what I see on the objdump for the shared object:


$ objdump -T /usr/lib/x86_64-linux-gnu/libserial.so | grep text | grep SerialPort
0000000000009ed0 g DF .text 0000000000000009 Base _ZNK10SerialPort6IsOpenEv
000000000000ba90 g DF .text 00000000000001b2 Base _ZN10SerialPort9WriteByteEh
000000000000e910 w DF .text 0000000000000020 Base _ZN10SerialPort7NotOpenD0Ev
000000000000e950 w DF .text 0000000000000020 Base _ZN10SerialPort11AlreadyOpenD0Ev
000000000000b290 g DF .text 00000000000005e1 Base _ZN10SerialPort4OpenENS_8BaudRateENS_13CharacterSi zeENS_6ParityENS_8StopBitsENS_11FlowControlE
000000000000e9d0 w DF .text 0000000000000020 Base _ZN10SerialPort19UnsupportedBaudRateD0Ev
000000000000d280 g DF .text 0000000000000596 Base _ZN10SerialPort8ReadLineEjc
000000000000e9f0 w DF .text 0000000000000013 Base _ZN10SerialPort11ReadTimeoutD2Ev
000000000000ccd0 g DF .text 00000000000005a6 Base _ZN10SerialPortC2ERKSs
0000000000009fa0 g DF .text 00000000000002b0 Base _ZN10SerialPort11SetBaudRateENS_8BaudRateE
000000000000d820 g DF .text 00000000000004a2 Base _ZN10SerialPort8ReadByteEj
000000000000e970 w DF .text 0000000000000013 Base _ZN10SerialPort10OpenFailedD2Ev
000000000000abe0 g DF .text 0000000000000288 Base _ZN10SerialPort16SetNumOfStopBitsENS_8StopBitsE
000000000000cb00 g DF .text 00000000000001a9 Base _ZN10SerialPortD2Ev
000000000000b880 g DF .text 000000000000017b Base _ZNK10SerialPort14GetFlowControlEv
000000000000ebc0 w DF .text 0000000000000130 Base _ZN10SerialPort14SerialPortImplD0Ev
000000000000e8f0 w DF .text 0000000000000013 Base _ZN10SerialPort7NotOpenD1Ev
000000000000e930 w DF .text 0000000000000013 Base _ZN10SerialPort11AlreadyOpenD1Ev
000000000000c750 g DF .text 00000000000001a0 Base _ZNK10SerialPort6GetCtsEv
000000000000a3d0 g DF .text 0000000000000225 Base _ZN10SerialPort11SetCharSizeENS_13CharacterSizeE
000000000000efc0 w DF .text 0000000000000908 Base _ZN10SerialPort14SerialPortImpl17HandlePosixSignal Ei
000000000000ae70 g DF .text 0000000000000179 Base _ZNK10SerialPort16GetNumOfStopBitsEv
000000000000c3f0 g DF .text 00000000000001b7 Base _ZN10SerialPort6SetRtsEb
000000000000e9b0 w DF .text 0000000000000013 Base _ZN10SerialPort19UnsupportedBaudRateD1Ev
000000000000bee0 g DF .text 00000000000001a5 Base _ZN10SerialPort5WriteERKSs
000000000000a780 g DF .text 00000000000002be Base _ZN10SerialPort9SetParityENS_6ParityE
000000000000c090 g DF .text 00000000000001b7 Base _ZN10SerialPort6SetDtrEb
000000000000ea10 w DF .text 0000000000000020 Base _ZN10SerialPort11ReadTimeoutD0Ev
000000000000c8f0 g DF .text 00000000000001a0 Base _ZNK10SerialPort6GetDsrEv
000000000000e990 w DF .text 0000000000000020 Base _ZN10SerialPort10OpenFailedD0Ev
000000000000dcd0 g DF .text 0000000000000c09 Base _ZN10SerialPort4ReadERSt6vectorIhSaIhEEjj
000000000000ccb0 g DF .text 0000000000000012 Base _ZN10SerialPortD0Ev
000000000000ea90 w DF .text 0000000000000130 Base _ZN10SerialPort14SerialPortImplD1Ev
000000000000e8f0 w DF .text 0000000000000013 Base _ZN10SerialPort7NotOpenD2Ev
000000000000e930 w DF .text 0000000000000013 Base _ZN10SerialPort11AlreadyOpenD2Ev
000000000000aff0 g DF .text 0000000000000293 Base _ZN10SerialPort14SetFlowControlENS_11FlowControlE
000000000000ca90 g DF .text 0000000000000064 Base _ZNK10SerialPort17GetFileDescriptorEv
0000000000009ee0 g DF .text 00000000000000bc Base _ZN10SerialPort5CloseEv
000000000000ccd0 g DF .text 00000000000005a6 Base _ZN10SerialPortC1ERKSs
000000000000bc50 g DF .text 0000000000000290 Base _ZN10SerialPort5WriteERKSt6vectorIhSaIhEE
000000000000e9b0 w DF .text 0000000000000013 Base _ZN10SerialPort19UnsupportedBaudRateD2Ev
000000000000ba00 g DF .text 000000000000008f Base _ZNK10SerialPort15IsDataAvailableEv
000000000000aa40 g DF .text 0000000000000194 Base _ZNK10SerialPort9GetParityEv
000000000000c5b0 g DF .text 00000000000001a0 Base _ZNK10SerialPort6GetRtsEv
000000000000e9f0 w DF .text 0000000000000013 Base _ZN10SerialPort11ReadTimeoutD1Ev
000000000000a600 g DF .text 0000000000000176 Base _ZNK10SerialPort11GetCharSizeEv
000000000000c250 g DF .text 000000000000019f Base _ZNK10SerialPort6GetDtrEv
000000000000a250 g DF .text 000000000000017b Base _ZNK10SerialPort11GetBaudRateEv
000000000000e970 w DF .text 0000000000000013 Base _ZN10SerialPort10OpenFailedD1Ev
000000000000ea90 w DF .text 0000000000000130 Base _ZN10SerialPort14SerialPortImplD2Ev
000000000000cb00 g DF .text 00000000000001a9 Base _ZN10SerialPortD1Ev


I don't check that often, but I don't see a straight-up SerialPort listed, and I'm not sure what's up with the _ZN prefixes (but maybe they're ok?).

[mfvpcrec]

Well...so that is a problem of ubuntu package... I guess that i must downgrade my version of ubuntu... :(
It was very awesome the objdump i didn't know do that

Thank you.
Bye!

[spjackson]

Well...so that is a problem of ubuntu package... I guess that i must downgrade my version of ubuntu... :(

I'd be surprised if the issue is limited to libserial. The bigger issue is the C++ ABI change between g++ 4 and g++ 5. Your sample does build on 15.10 with:



g++ program.cpp -lserial -lpthread -D_GLIBCXX_USE_CXX11_ABI=0

I'm not sure if there's a better "official" answer.