如何指定构建pybind11模块的python版本

Question

我已经设置了 pybind11 来构建用 c++ 编写的 python 模块。 我的ubuntu系统上安装了python3.6和python3.7，我安装了

python3.6-dev

和

python3.7-dev

。然后我为我的项目设置

cmakelists.txt

文件，如下所示：

set(PYTHONVERSION "3.7")
# None of the lines below works 
add_definitions(-DPYBIND11_PYTHON_VERSION="${PYTHONVERSION}")
set(PYBIND11_PYTHON_VERSION ${PYTHONVERSION} CACHE STRING "")
set(PYBIND11_PYTHON_VERSION ${PYTHONVERSION}) 
find_package(Python ${PYTHONVERSION} COMPONENTS Development Interpreter)

set(TARGET proj)
pybind11_add_module(${TARGET} MODULE proj.cpp)
target_include_directories(${TARGET} PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
if (Python_FOUND)
    target_include_directories(${TARGET} PUBLIC ${Python_INCLUDE_DIRS})
endif()

但是，当我构建项目时，它仍然生成

python3.6

而不是

python3.7

的模块。下面是我的 cmake 输出，我发现 cmake 首先找到

python3.6

，我什至没有调用

findpython

。

[cmake] Not searching for unused variables given on the command line.
[cmake] -- The C compiler identification is GNU 9.3.0
[cmake] -- The CXX compiler identification is GNU 9.3.0
[cmake] -- Detecting C compiler ABI info
[cmake] -- Detecting C compiler ABI info - done
[cmake] -- Check for working C compiler: /usr/bin/gcc-9 - skipped
[cmake] -- Detecting C compile features
[cmake] -- Detecting C compile features - done
[cmake] -- Detecting CXX compiler ABI info
[cmake] -- Detecting CXX compiler ABI info - done
[cmake] -- Check for working CXX compiler: /usr/bin/g++-9 - skipped
[cmake] -- Detecting CXX compile features
[cmake] -- Detecting CXX compile features - done
[cmake] -- Conan: Adjusting output directories
[cmake] -- Conan: Using cmake global configuration
[cmake] -- Conan: Adjusting default RPATHs Conan policies
[cmake] -- Conan: Adjusting language standard
[cmake] -- Current conanbuildinfo.cmake directory: /home/mpnv38/develop/parcel_dim_pywrapper/build
[cmake] -- Conan: Compiler GCC>=5, checking major version 9
[cmake] -- Conan: Checking correct version: 9
[cmake] -- Found PythonInterp: /usr/bin/python (found version "3.6.9") 
[cmake] -- Found PythonLibs: /usr/lib/x86_64-linux-gnu/libpython3.6m.so
[cmake] -- Performing Test HAS_CPP14_FLAG
[cmake] -- Performing Test HAS_CPP14_FLAG - Success
[cmake] -- Found Python: /usr/bin/python3.7 (found suitable version "3.7.5", minimum required is "3.7") found components: Development Interpreter Development.Module Development.Embed 
[cmake] -- Configuring done
[cmake] -- Generating done

我错过了什么吗？

Answer 1

在 CMakeLists.txt 添加以下内容

set (PYTHON_EXECUTABLE "path to python executable")