build@students1804:~/NetworksLab2018AU/messenger/linux_client$ cmake .
-- The C compiler identification is GNU 7.3.0
-- The CXX compiler identification is GNU 7.3.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Configuring done
-- Generating done
-- Build files have been written to: /home/build/NetworksLab2018AU/messenger/linux_client
build@students1804:~/NetworksLab2018AU/messenger/linux_client$ make
Scanning dependencies of target tcp_client
[ 33%] Building CXX object CMakeFiles/tcp_client.dir/main.cpp.o
[ 66%] Building CXX object CMakeFiles/tcp_client.dir/client.cpp.o
/home/build/NetworksLab2018AU/messenger/linux_client/client.cpp: In constructor ‘elegram::client::client(const char*, uint16_t, const char*)’:
/home/build/NetworksLab2018AU/messenger/linux_client/client.cpp:13:23: error: ‘strlen’ was not declared in this scope
     _login = new char[strlen(login) + 1];
                       ^~~~~~
/home/build/NetworksLab2018AU/messenger/linux_client/client.cpp:13:23: note: suggested alternative: ‘mbrlen’
     _login = new char[strlen(login) + 1];
                       ^~~~~~
                       mbrlen
/home/build/NetworksLab2018AU/messenger/linux_client/client.cpp:14:5: error: ‘strcpy’ was not declared in this scope
     strcpy(_login, login);
     ^~~~~~
/home/build/NetworksLab2018AU/messenger/linux_client/client.cpp:14:5: note: suggested alternative: ‘stop’
     strcpy(_login, login);
     ^~~~~~
     stop
/home/build/NetworksLab2018AU/messenger/linux_client/client.cpp: In member function ‘void elegram::client::send_message(const char*)’:
/home/build/NetworksLab2018AU/messenger/linux_client/client.cpp:34:46: error: ‘strlen’ was not declared in this scope
     auto buffer_size = static_cast<uint32_t>(strlen(msg) + strlen(_login) + 2 + 2 * sizeof(uint32_t));
                                              ^~~~~~
/home/build/NetworksLab2018AU/messenger/linux_client/client.cpp:34:46: note: suggested alternative: ‘mbrlen’
     auto buffer_size = static_cast<uint32_t>(strlen(msg) + strlen(_login) + 2 + 2 * sizeof(uint32_t));
                                              ^~~~~~
                                              mbrlen
/home/build/NetworksLab2018AU/messenger/linux_client/client.cpp:42:5: error: ‘strcpy’ was not declared in this scope
     strcpy(buffer + offset, _login);
     ^~~~~~
/home/build/NetworksLab2018AU/messenger/linux_client/client.cpp:42:5: note: suggested alternative: ‘stop’
     strcpy(buffer + offset, _login);
     ^~~~~~
     stop
CMakeFiles/tcp_client.dir/build.make:86: recipe for target 'CMakeFiles/tcp_client.dir/client.cpp.o' failed
make[2]: *** [CMakeFiles/tcp_client.dir/client.cpp.o] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/tcp_client.dir/all' failed
make[1]: *** [CMakeFiles/tcp_client.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2