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Using VSCode (which I'm quite new to) on Ubuntu 20.04, I wish to build a C-extension (actually C++ extension) to Python.

I'm trying to build the following MWE:

#include <numpy/arrayobject.h>
int main() {return 0;}

However the build fails on #include <numpy/arrayobject.h> with the error

/usr/include/numpy/ndarrayobject.h:11:10: fatal error: Python.h: No such file or directory

I do have python3.9-dev installed, and my c_cpp_properties.json is supposed to contain the relevant path to include:

{
    "configurations": [
        {
            "name": "Linux",
            "includePath": [
                "${workspaceFolder}/**",
                "/usr/include/python3.9",
            ],
            "defines": [],
            "compilerPath": "/usr/bin/clang",
            "cStandard": "c17",
            "cppStandard": "c++14",
            "intelliSenseMode": "linux-clang-x64"
        }
    ],
    "version": 4
}

This question was supposedly answered plenty of times in the past, and yet nothing works for me from any answer I found.

Thank you for your help.

Improve this question
7
  • c_cpp_properties.json has nothing to do with the compiler. The file you need to edit to affect the compiler is tasks.json. Commented Oct 3, 2023 at 21:05
  • @john Can you elaborate on the required change? Can I make g++ look inside /usr/include/python3.9 by default? Commented Oct 3, 2023 at 21:08
  • 2
    Your tasks.json file contains arguments passed to the compiler g++. Judging by your question above, you need to add the argument "-I/usr/include/python3.9" Commented Oct 3, 2023 at 21:09
  • @john Thank you for your help. Adding that argument in the beginning of the "args" list, I now get another errors: 1. /usr/include/python3.9/object.h:430: undefined reference to `_Py_Dealloc'. 2. /usr/include/numpy/__multiarray_api.h:1466: undefined reference to `PyImport_ImportModule' Commented Oct 3, 2023 at 21:14
  • 1
    Well those are link errors. Again the solution will be one or more additional arguments to tasks.json to link with the correct libraries. Not knowing much about python I have no idea what those might be. Probably worth a new question, and this time include your tasks.json file in the question. Commented Oct 3, 2023 at 21:17
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