Problem with embedded Python in combination with CMake 3.4+

I am not sure whether this is a CMake issue, or a pybind11 issue. The following is a minimal example that reproduces the problem.

A simple module that exposes a function (cpp_module_pybind11.cpp):

#include <pybind11/pybind11.h>
namespace py = pybind11;

PYBIND11_MODULE(cpp_module, m) {
  m.def("add", [](int i, int j) { return i + j; });
}

A Python module that imports cpp_module (issue.py):

import cpp_module

An executable that imports issue:

#include <pybind11/embed.h>
namespace py = pybind11;

int main()
{
  py::scoped_interpreter guard{};
  py::module::import("issue");
}

I am using the following CMake file:

cmake_minimum_required(VERSION 3.4)

find_package(pybind11 REQUIRED)
find_package(Threads)

pybind11_add_module(cpp_module cpp_module_pybind11.cpp)

add_executable(example main.cpp)
target_link_libraries(example PRIVATE pybind11::embed Threads::Threads ${CMAKE_DL_LIBS})

Running ./example after compiling everything (cmake . && make) results in the following error (in combination with Python 3.7):

terminate called after throwing an instance of 'pybind11::error_already_set'
  what():  ImportError: ./cpp_module.cpython-37m-x86_64-linux-gnu.so: undefined symbol: PyInstanceMethod_Type

At:
  ./issue.py(1): <module>
  <frozen importlib._bootstrap>(219): _call_with_frames_removed
  <frozen importlib._bootstrap_external>(728): exec_module
  <frozen importlib._bootstrap>(677): _load_unlocked
  <frozen importlib._bootstrap>(967): _find_and_load_unlocked
  <frozen importlib._bootstrap>(983): _find_and_load

zsh: abort (core dumped)  ./example

When modifying the CMake file to set the minimum required version to 3.3, everything works without any issues.

The root cause seems to be a missing (?) -rdynamic flag when building the executable. Indeed, setting the minimum required CMake version to 3.4 and then manually adding -rdynamic to the target_link_libraries command fixes the issue.

Is this an issue in the pybind CMake files, or an issue in CMake itself? This is the CMake 3.4 changelog: https://cmake.org/cmake/help/latest/release/3.4.html