Symbol not found error for matplotlibcpp, building with CMake - c++

Question

I am trying to use CMake for including Matplotlibcpp in my C++ project (I am new to both CMake and C++). I am following https://github.com/lava/matplotlib-cpp/issues/236#issuecomment-716510547 for setting up a CMake file. The project builds fine, but when I try to run the executable, here is the error I get:
dyld[73245]: symbol not found in flat namespace
'_PyCapsule_GetPointer'
zsh: abort ./data_measure_img_seq
I'm not sure how to resolve this. Any suggestions? For reference, I am putting my CMakeLists file below:
# set the minimum version
cmake_minimum_required(VERSION "3.13")
# set project
project(image-data-cv)
set(OpenCV_DIR /Users/anshgodha/Developer/opencv/install/lib/cmake/opencv4)
set(CMAKE_CXX_STANDARD 14)
find_package( OpenCV REQUIRED )
include_directories( ${OpenCV_INCLUDE_DIRS} )
# for matplotlibcpp
find_package(Python3 COMPONENTS Interpreter Development NumPy REQUIRED)
find_package(PythonLibs 3.0 REQUIRED)
include_directories(${PYTHON3_INCLUDE_DIRS} ${NumPy_INCLUDE_DIRS})
include(FetchContent)
FetchContent_Declare(
matplotlib
GIT_REPOSITORY https://github.com/lava/matplotlib-cpp.git
GIT_TAG f23347fca25219d1c42cbb91608b5556814bf572
)
FetchContent_GetProperties(matplotlib)
if(NOT matplotlib_POPULATED)
FetchContent_Populate(matplotlib)
endif()
include_directories(SYSTEM ${matplotlib_SOURCE_DIR})
set(PROJECTS basic_data_measures;data_measure_img_seq)
foreach(PROJECT ${PROJECTS})
add_executable(${PROJECT} ${PROJECT}/main.cpp)
target_link_libraries(${PROJECT} PUBLIC ${OpenCV_LIBS})
set_target_properties(${PROJECT} PROPERTIES OUTPUT_NAME "${PROJECT}")
endforeach(PROJECT ${PROJECTS})
# link python and numpy
target_link_libraries(data_measure_img_seq
PRIVATE
${PYTHON_LIBRARIES}
Python3::NumPy
)

Answer 1

I was having the same issue compiling using cmake. Perhaps the included cmake doesn't link everything properly. I got around it using e.g.
g++ fill.cpp -o fill -std=c++11 -I/usr/include/python2.7 -lpython2.7