How do I ignore the python.exe installed by vcpkg and use numpy?

[snnn]

So, I want to use numpy.

I have the following code in my project:

      find_package(Python 3.6 COMPONENTS Interpreter Development.Module NumPy REQUIRED)

But it doesn't work. Because my vcpkg installing dir has python. But the python installation is kind of incomplete. It doesn't have pip or numpy. So I don't want to use it. I hope I can prevent it being found by the above code. I tried to manually set Python_EXECUTABLE/PYTHON_EXECUTABLE/Python_ROOT_DIR to the system-wide python installation, but none of them works.

My vcpkg file:

{
  "$schema": "https://raw.githubusercontent.com/microsoft/vcpkg/master/scripts/vcpkg.schema.json",
  "name": "xxxxx",
  "version": "1.12.0",
  "builtin-baseline": "e809a42f87565e803b2178a0c11263f462d1800a",
  "overrides": [
    {
      "name": "pybind11",
      "version": "2.6.2"
    }
  ],
  "dependencies": [
    {
      "name": "protobuf",
      "version>=": "3.18.0"
    },
    {
      "name": "date",
      "version>=": "3.0.1"
    },
    {
      "name": "pybind11"
    },
    {
      "name": "cpuinfo"
    },
    {
      "name": "re2"
    },
    {
      "name": "wil"
    },
    {
      "name": "boost-mp11",
      "version>=": "1.79.0"
    },
    {
      "name": "nlohmann-json",
      "version>=": "3.10.5"
    },
    {
      "name": "onnx",            //This one adds python in.
      "version>=": "1.10.2"
    },
    {
      "name": "gtest",
      "version>=": "1.11.0"
    },
    {
      "name": "flatbuffers"
    }
  ]
}

[Socrats]

Same issue here. I need cmake to use the system python and not the one vckpg installed. Can't find a way to do this...

[Osyotr]

https://devblogs.microsoft.com/cppblog/using-system-package-manager-dependencies-with-vcpkg/

[RealLitb]

This is what I do. I put a single CMakeLists.txt file in a subdirectory, in which I do find_package (which is scoped to the directory), and declare global aliases that I can use throughout my project!

# for now, we won't use VCPKG's python, but rely on Debian's python! This might change some time in the future..
list(APPEND CMAKE_IGNORE_PREFIX_PATH ${VCPKG_SYSROOT})

# VCPKG overrides find_package and does not let us skip it. So we forcully skip it here by using the original find_package of CMake
_find_package(Python3 REQUIRED COMPONENTS Interpreter Development)

add_executable(TargetPython3_Interpreter IMPORTED GLOBAL)
add_library(TargetPython3_Python INTERFACE)
add_library(TargetPython3_Module INTERFACE)

add_executable(TargetPython3::Interpreter ALIAS TargetPython3_Interpreter)
add_library(TargetPython3::Python ALIAS TargetPython3_Python)
add_library(TargetPython3::Module ALIAS TargetPython3_Module)

get_target_property(imported_python3_location Python3::Interpreter IMPORTED_LOCATION)
set_target_properties(TargetPython3_Interpreter PROPERTIES IMPORTED_LOCATION "${imported_python3_location}")
target_link_libraries(TargetPython3_Python INTERFACE Python3::Python)
target_link_libraries(TargetPython3_Module INTERFACE Python3::Module)

message(STATUS "Target-time Python set to use ${imported_python3_location} (by-passing VCPKG for now)")

The cleaner way is to prevent Python from being built by VCPKG.. but if you can't do that, for whatever reason, then maybe that code helps.