Buildozer Numpy RuntimeError：工具链损坏：无法链接简单的 C 程序

用 Python 编写我的第一个 Android 应用程序并使用 Buildozer 对其进行打包。因为稍后在项目中需要使用numpy，所以我尝试打包以下测试代码：

import numpy
import kivy
kivy.require('1.0.6')
from kivy.app import App
from kivy.uix.button import Button

class TestApp(App):
    def build(self):
        return Button(text='Hello World')

TestApp().run()

但是，我收到以下错误：

Traceback (most recent call last):
  File "setup.py", line 251, in <module>
    setup_package()
  File "setup.py", line 243, in setup_package
    setup(**metadata)
  File "/home/kivy/Desktop/cam/.buildozer/android/platform/build/build/other_builds/numpy/armeabi-v7a/numpy/numpy/distutils/core.py", line 169, in setup
    return old_setup(**new_attr)
  File "/home/kivy/Desktop/cam/.buildozer/android/platform/build/build/python-installs/myapp/lib/python2.7/distutils/core.py", line 152, in setup
    dist.run_commands()
  File "/home/kivy/Desktop/cam/.buildozer/android/platform/build/build/python-installs/myapp/lib/python2.7/distutils/dist.py", line 953, in run_commands
    self.run_command(cmd)
  File "/home/kivy/Desktop/cam/.buildozer/android/platform/build/build/python-installs/myapp/lib/python2.7/distutils/dist.py", line 972, in run_command
    cmd_obj.run()
  File "/home/kivy/Desktop/cam/.buildozer/android/platform/build/build/other_builds/numpy/armeabi-v7a/numpy/numpy/distutils/command/build_ext.py", line 59, in run
    self.run_command('build_src')
  File "/home/kivy/Desktop/cam/.buildozer/android/platform/build/build/python-installs/myapp/lib/python2.7/distutils/cmd.py", line 326, in run_command
    self.distribution.run_command(command)
  File "/home/kivy/Desktop/cam/.buildozer/android/platform/build/build/python-installs/myapp/lib/python2.7/distutils/dist.py", line 972, in run_command
    cmd_obj.run()
  File "/home/kivy/Desktop/cam/.buildozer/android/platform/build/build/other_builds/numpy/armeabi-v7a/numpy/numpy/distutils/command/build_src.py", line 153, in run
    self.build_sources()
  File "/home/kivy/Desktop/cam/.buildozer/android/platform/build/build/other_builds/numpy/armeabi-v7a/numpy/numpy/distutils/command/build_src.py", line 164, in build_sources
    self.build_library_sources(*libname_info)
  File "/home/kivy/Desktop/cam/.buildozer/android/platform/build/build/other_builds/numpy/armeabi-v7a/numpy/numpy/distutils/command/build_src.py", line 299, in build_library_sources
    sources = self.generate_sources(sources, (lib_name, build_info))
  File "/home/kivy/Desktop/cam/.buildozer/android/platform/build/build/other_builds/numpy/armeabi-v7a/numpy/numpy/distutils/command/build_src.py", line 386, in generate_sources
    source = func(extension, build_dir)
  File "numpy/core/setup.py", line 686, in get_mathlib_info
    raise RuntimeError("Broken toolchain: cannot link a simple C program")
RuntimeError: Broken toolchain: cannot link a simple C program


  STDERR:
# Command failed: /usr/bin/python -m pythonforandroid.toolchain create --dist_name=myapp --bootstrap=sdl2 --requirements=kivy,numpy --arch armeabi-v7a --copy-libs --color=always --storage-dir=/home/kivy/Desktop/cam/.buildozer/android/platform/build
# 
# Buildozer failed to execute the last command
# The error might be hidden in the log above this error
# Please read the full log, and search for it before
# raising an issue with buildozer itself.
# In case of a bug report, please add a full log with log_level = 2

另外，这是我的buildozer.spec file:

title = My Application
package.name = myapp
package.domain = org.test
source.dir = .
source.include_exts = py,png,jpg,kv,atlas
version = 1.0

requirements = kivy,numpy

orientation = portrait
osx.kivy_version = 1.9.1
fullscreen = 0
android.api = 19
android.sdk = 20
android.ndk = 9c
android.arch = armeabi-v7a
log_level = 2
warn_on_root = 1

请注意，当我从 python 代码中删除“import numpy”并从 buildozer.spec 文件的需求列表中删除“numpy”时，我的代码已完美打包。我在预装了 Buildozer 的 VM Virtual Box 上运行它。

而且，不仅仅是 Numpy 给了我这个问题 - OpenCV 也给了我完全相同的错误。如果需要，将为此单独发布帖子。

Python for Android (p4a) 项目中报告了此问题here https://github.com/kivy/python-for-android/issues/1141，不知道它对于稳定的 p4a 来说是实际的。不过，通过链接您可以找到解决问题的 PR https://github.com/kivy/python-for-android/pull/1209。我没有测试过，但不同的人说它有效。

您可以尝试使用此修复程序构建 numpy，这就是您需要的：

1. 确保使用命令清除当前构建过程中剩余的所有内容：

   buildozer distclean

2. 使用命令克隆 p4a 分支并修复：

   git clone -b p4a_numpy_fix https://github.com/mahomahomaho/python-for-android fix-numpy

3. 改变你的buildozer.spec使用 p4a 的克隆版本（使用您的实际路径）：

   p4a.source_dir = /home/ubuntu/p4a_numpy_fix

并再次运行构建 apk。如果一切正常，您就可以构建 apk。如果没有，您将面临另一个错误，这里不能保证:(