python-for-android，Cython，C ++，CythonRecipe：仅在c ++中允许操作

如何解决python-for-android，Cython，C ++，CythonRecipe：仅在c ++中允许操作

我的Cython项目有这个setup.py：

from setuptools import setup
from Cython.Build import cythonize

setup(
    name = 'phase-engine',version = '0.1',ext_modules = cythonize(["phase_engine.pyx"] + ['music-synthesizer-for-android/src/' + p for p in [
            'fm_core.cc','dx7note.cc','env.cc','exp2.cc','fm_core.cc','fm_op_kernel.cc','freqlut.cc','lfo.cc','log2.cc','patch.cc','pitchenv.cc','resofilter.cc','ringbuffer.cc','sawtooth.cc','sin.cc','synth_unit.cc'
        ]],include_path = ['music-synthesizer-for-android/src/'],language = 'c++',)
)

当我运行buildozer时，它为某些Cython功能仅在C ++模式下可用而感到生气：

    def __dealloc__(self):
        del self.p_synth_unit
       ^
------------------------------------------------------------

phase_engine.pyx:74:8: Operation only allowed in c++

据我了解，

会忽略我的setup.py并以某种方式自行执行。如何给所有这些参数？

解决方法

CythonRecipe不适用于导入C / C ++代码的Cython代码。尝试CompiledComponentsPythonRecipe，或者如果您遇到#include <ios>或C ++ STL CppCompiledComponentsPythonRecipe中的其他问题：

from pythonforandroid.recipe import IncludedFilesBehaviour,CppCompiledComponentsPythonRecipe
import os
import sys

class MyRecipe(IncludedFilesBehaviour,CppCompiledComponentsPythonRecipe):
    version = 'stable'
    src_filename = "../../../phase-engine"
    name = 'phase-engine'

    depends = ['setuptools']

    call_hostpython_via_targetpython = False
    install_in_hostpython = True

    def get_recipe_env(self,arch):
        env = super().get_recipe_env(arch)
        env['LDFLAGS'] += ' -lc++_shared'
        return env

recipe = MyRecipe()

由于某些怪异的东西，对setuptools的依赖是必不可少的，否则会出现错误no module named setuptools。其他两个标志也与该错误相关，互联网上说这是相关的，因此我尝试了值组合，直到一个可行为止。

LDFLAGS修复了我以后遇到的一个问题（请参阅buildozer + Cython + C++ library: dlopen failed: cannot locate symbol symbol-name referenced by module.so）。