`undefined reference to *` error on building consumer example about cppkafka HOT 17 CLOSED

i have the same problem.
i install rdkafka and cppkafka, then i write main.cpp

#include <cppkafka/producer.h>
using namespace std;
using namespace cppkafka;
int main() {
    // Create the config
    Configuration config = {
        { "metadata.broker.list", "127.0.0.1:9092" }
    };

    // Create the producer
    Producer producer(config);

    // Produce a message!
    string message = "hey there!";
    producer.produce(MessageBuilder("my_topic").partition(0).payload(message));
    producer.flush();
}

i write the CMakeLists.txt as follows:

cmake_minimum_required(VERSION 3.10)
project(test)
set(CMAKE_CXX_STANDARD 11)
include_directories("/usr/local/include/librdkafka")
include_directories("/usr/local/include/cppkafka")
link_libraries("/usr/local/lib")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -lrdkafka++ -lrdkafka -lcppkafka")
add_executable(test main.cpp)

but when i compile and run the main.cpp
it shows:

undefined reference to `cppkafka::ConfigurationOption::ConfigurationOption(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, char const*)'
undefined reference to `cppkafka::Configuration::Configuration(std::initializer_list<cppkafka::ConfigurationOption> const&)'
...

what did i miss?
gcc 5.4
ubuntu 16.04

from cppkafka.

Did you run sudo ldconfig after installing both libraries?

from cppkafka.

No, I did the following steps:

1. mkdir build

2. cd build

3. cmake ..

4. make

5. sudo make install

from cppkafka.

from cppkafka.

Thanks, I ran it. But still there is no .cpp file in directory /usr/local/include/cppkafka. It should be?

from cppkafka.

from cppkafka.

No, I didn't link my project to cppkafka and lrdkafka. Can you clarify that pls? Thanks

from cppkafka.

from cppkafka.

Thanks for your answering. You know I'm C++ coder but totally newbie to making libraries.
I created a project using clion and run code there. Can you say more details how and where I should link them? In which step?

Thanks in advanced

from cppkafka.

Which one should I link to? cppkafka and rdkafka I downloaded from github or cppkafka and rdkafka created in path /usr/local/include after doing make?

from cppkafka.

I have never used CLion. Search for how to configure the compiler link flags and add "-lcppkafka -lrdkafka" to them.

from cppkafka.

Thanks, now it errors undefined reference to boost::program_options::options_description::m_default_line_length'|

it's because of boost
How can I fix that?

from cppkafka.

from cppkafka.

That's it, using -lboost_program_options, It works
Thanks a lot!!!!!!!!!!!

from cppkafka.

I solve it. I should learn how to use cmake!
I modify the CMakeLists.txt

cmake_minimum_required(VERSION 3.10)
project(test)
set(CMAKE_CXX_STANDARD 11)
include_directories("/usr/local/include/librdkafka")
include_directories("/usr/local/include/cppkafka")
FIND_LIBRARY(RDKAFKA rdkafka /usr/local/lib NO_DEFAULT_PATH)
FIND_LIBRARY(CPPKAFKA cppkafka /usr/local/lib NO_DEFAULT_PATH)
link_libraries(${RDKAFKA} ${CPPKAFKA})
add_executable(test src/main.cpp)
target_link_libraries(test cppkafka)
target_link_libraries(test rdkafka)

now It works well!

from cppkafka.

I think you just had to run ldconfig as root right after installing cppkafka.

from cppkafka.

@mfontanini I runned sudo ldconfig before. and the CMakeLists.txt is as follows:

cmake_minimum_required(VERSION 3.10)
project(test)
set(CMAKE_CXX_STANDARD 11)
add_executable(test src/main.cpp)

The problem happens.
I try the steps again and get the same result. It bothers me.

should I modify /etc/ld.so.conf ?
But when I run ldconfig -p|grep kafka , it shows

	librdkafka.so.1 (libc6,x86-64) => /usr/local/lib/librdkafka.so.1
	librdkafka.so (libc6,x86-64) => /usr/local/lib/librdkafka.so
	librdkafka++.so.1 (libc6,x86-64) => /usr/local/lib/librdkafka++.so.1
	librdkafka++.so (libc6,x86-64) => /usr/local/lib/librdkafka++.so
	libcppkafka.so.0.1 (libc6,x86-64) => /usr/local/lib/libcppkafka.so.0.1
	libcppkafka.so (libc6,x86-64) => /usr/local/lib/libcppkafka.so

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