undefined reference to `operator<<(std::ostream&, cpp_redis::reply const&)'

[cccnrc]

I followed the installation procedure (https://github.com/Cylix/cpp_redis/wiki/Mac-&-Linux-Install), using the updated library instead of the old one:

# ... rest of procedure described in link
git clone https://github.com/cpp-redis/cpp_redis.git
# ... rest of procedure described in link

Now when I try to run a program (even

cpp_redis_client.cpp

in the example dir) I got the error:

/tmp/ccptfGnr.o: In function `main::{lambda(cpp_redis::reply&)#1}::operator()(cpp_redis::reply&) const':
ex0.cpp:(.text+0xc5): undefined reference to `operator<<(std::ostream&, cpp_redis::reply const&)'
/tmp/ccptfGnr.o: In function `main':
ex0.cpp:(.text+0x105): undefined reference to `cpp_redis::client::client()'
ex0.cpp:(.text+0x17c): undefined reference to `cpp_redis::client::connect(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, unsigned long, std::function<void (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, unsigned long, cpp_redis::connect_state)> const&, unsigned int, int, unsigned int)'
ex0.cpp:(.text+0x223): undefined reference to `cpp_redis::client::set(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
ex0.cpp:(.text+0x2bd): undefined reference to `cpp_redis::client::get(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::function<void (cpp_redis::reply&)> const&)'
ex0.cpp:(.text+0x2f0): undefined reference to `cpp_redis::client::sync_commit()'
ex0.cpp:(.text+0x304): undefined reference to `cpp_redis::client::~client()'
ex0.cpp:(.text+0x3ca): undefined reference to `cpp_redis::client::~client()'
collect2: error: ld returned 1 exit status

I tried with#include <iostream>but nothing worked.

Here my code:

#include <string>
#include <cpp_redis/cpp_redis>
#include <cpp_redis/misc/macro.hpp>
#include <iostream>

/*
to compile:
gcc -lstdc++ --std=c++11  \
    ex0.cpp \
    -o ex0 \
    && time ./ex0
*/

int main(int argc, char const *argv[]) {

//    cpp_redis::active_logger = std::unique_ptr<cpp_redis::logger>(new cpp_redis::logger);

    cpp_redis::client client;

    client.connect();

    client.set("hello", "42");
    client.get("hello", [](cpp_redis::reply& reply) {
      std::cout << reply << std::endl;
    });
    //! also support std::future
    //! std::future<cpp_redis::reply> get_reply = client.get("hello");

    client.sync_commit();
    //! or client.commit(); for asynchronous call

    return 0;
}

Compiled through gcc:
gcc -lstdc++ --std=c++11 ex0.cpp -o ex0
Thanks a lot in advance for any help!

[dobeeisfree]

Hi @cccnrc,

You need to link target libraries (cpp_redis, tacopie)

I recommend building with CMake.

[dhruvkakadiya]

gcc -lstdc++ -lcpp_redis -ltacopie --std=c++11 ex0.cpp -o ex0