I have following file structure:

src
  test_lib
    interface.cpp
    interface.hpp
  main.cpp

File contents:

// interface.hpp

#include <string>
#include <string_view>

struct Interface {
  Interface(const std::string_view &);
  auto set_name(const std::string_view &) -> void;
  auto get_name() const -> std::string;

private:
  std::string m_name;
};

// interface.cpp
#include "interface.hpp"

Interface::Interface(const std::string_view &name) : m_name(name) {}

auto Interface::set_name(const std::string_view &name) -> void {
  m_name = name;
}

auto Interface::get_name() const -> std::string { return m_name; }

I compile them as follows in from the src folder as follows:

g++ -fPIC -std=c++23 -c test_lib/interface.cpp
ld -shared interface.o -o libinterface.so

The main file is as follows:

#include "test_lib/interface.hpp"

#include <cstdint>
#include <print>

auto main(int32_t argc, char *argv[]) -> int32_t {
  Interface interface("Hello Library");

  return 0;
}

I compile the main and link with shared as follows:

g++ -Wall -std=c++23 -L/path_to_src/src/test_shared_lib main.cpp -Wl,-rpath -linterface

I get following errors:

/usr/bin/ld: /tmp/ccZJeRFh.o: in function `main':
main.cpp:(.text+0x44): undefined reference to `Interface::Interface(std::basic_string_view<char, std::char_traits<char> > const&)'
collect2: error: ld returned 1 exit status

The objdump command returns this:

objdump -T --demangle libinterface.so | grep "Interface"
0000000000003538 g    DF .text  0000000000000026 Interface::set_name(std::basic_string_view<char, std::char_traits<char> > const&)
000000000000355e g    DF .text  0000000000000029 Interface::get_name[abi:cxx11]() const
00000000000034e0 g    DF .text  0000000000000058 Interface::Interface(std::basic_string_view<char, std::char_traits<char> > const&)
00000000000034e0 g    DF .text  0000000000000058 Interface::Interface(std::basic_string_view<char, std::char_traits<char> > const&)

Please help me resolve this.