无法安装Kivy:Cython/GCC

Question

所以我试着按照官方网站的指示安装Kivy：

$ sudo apt-get install python-setuptools python-pygame python-opengl \
  python-gst0.10 python-enchant gstreamer0.10-plugins-good python-dev \
  build-essential libgl1-mesa-dev libgles2-mesa-dev python-pip

$ sudo pip install --upgrade cython

$ sudo easy_install kivy

这就是我得到的：

Searching for kivy
Reading http://pypi.python.org/simple/kivy/
Best match: Kivy 1.4.1
Downloading http://pypi.python.org/packages/source/K/Kivy/Kivy-1.4.1.tar.gz#md5=94bba894269e4bdecc7881f256367e01
Processing Kivy-1.4.1.tar.gz
Running Kivy-1.4.1/setup.py -q bdist_egg --dist-dir /tmp/easy_install-MMi2Fv/Kivy-1.4.1/egg-dist-tmp-EcKbfC
[INFO   ] Kivy v1.4.1
Found GLES 2.0 headers at /usr/include/GLES2/gl2.h
Build configuration is:
 * use_opengl_es2  =  True
 * use_glew  =  False
 * use_opengl_debug  =  False
 * use_mesagl  =  False
Generate config.h
Generate config.pxi
/tmp/easy_install-MMi2Fv/Kivy-1.4.1/kivy/graphics/transformation.c: In function ‘__pyx_f_4kivy_8graphics_14transformation_6Matrix_identity’:
/tmp/easy_install-MMi2Fv/Kivy-1.4.1/kivy/graphics/transformation.c:2774:13: error: incompatible types when assigning to type ‘__pyx_t_4kivy_8graphics_14transformation_matrix_t’ from type ‘double *’
/tmp/easy_install-MMi2Fv/Kivy-1.4.1/kivy/graphics/transformation.c: In function ‘__pyx_f_4kivy_8graphics_14transformation_6Matrix_inverse’:
/tmp/easy_install-MMi2Fv/Kivy-1.4.1/kivy/graphics/transformation.c:2978:13: error: incompatible types when assigning to type ‘__pyx_t_4kivy_8graphics_14transformation_matrix_t’ from type ‘double *’
/tmp/easy_install-MMi2Fv/Kivy-1.4.1/kivy/graphics/transformation.c:2980:13: error: incompatible types when assigning to type    ‘__pyx_t_4kivy_8graphics_14transformation_matrix_t’ from type ‘double *’
/tmp/easy_install-MMi2Fv/Kivy-1.4.1/kivy/graphics/transformation.c: In function ‘__pyx_f_4kivy_8graphics_14transformation_6Matrix_multiply’:
/tmp/easy_install-MMi2Fv/Kivy-1.4.1/kivy/graphics/transformation.c:3364:13: error: incompatible types when assigning to type ‘__pyx_t_4kivy_8graphics_14transformation_matrix_t’ from type ‘double *’
/tmp/easy_install-MMi2Fv/Kivy-1.4.1/kivy/graphics/transformation.c:3366:13: error: incompatible types when assigning to type ‘__pyx_t_4kivy_8graphics_14transformation_matrix_t’ from type ‘double *’
/tmp/easy_install-MMi2Fv/Kivy-1.4.1/kivy/graphics/transformation.c:3368:13: error: incompatible types when assigning to type ‘__pyx_t_4kivy_8graphics_14transformation_matrix_t’ from type ‘double *’
/tmp/easy_install-MMi2Fv/Kivy-1.4.1/kivy/graphics/transformation.c: In function ‘__pyx_pf_4kivy_8graphics_14transformation_6Matrix_20__str__’:
/tmp/easy_install-MMi2Fv/Kivy-1.4.1/kivy/graphics/transformation.c:3674:13: error: incompatible types when assigning to type ‘__pyx_t_4kivy_8graphics_14transformation_matrix_t’ from type ‘double *’
 error: Setup script exited with error: command 'gcc' failed with exit status 1

在网络上找不到答案后，我开始调查产生错误的文件：transformation.c、transformation.pyx和transformation.pyd。我也读了一些关于赛顿的书。

首先，所有的错误都是相同的：

error: incompatible types when assigning to type ‘__pyx_t_4kivy_8graphics_14transformation_matrix_t’ from type ‘double *’

此处出现第一个错误：

__pyx_t_3 = __pyx_v_self->mat;

pyx_t_3的类型是：

__pyx_t_4kivy_8graphics_14transformation_matrix_t

它有这个奇怪的名字，因为它是从transformation.pxd文件自动生成的：

ctypedef double matrix_t[16]

因此，type（u pyx_t_3）==类型（矩阵）==双*。

pyx_v_self的类型是：

struct __pyx_obj_4kivy_8graphics_14transformation_Matrix *

同样，它是从转换生成的

ctypedef double matrix_t[16]

cdef class Matrix:
    cdef matrix_t mat
    ...

因此，type（u pyx_v_self->；mat）==类型（Matrix.mat）==类型（Matrix_t）==双*

如我们所见，任务的双方：

__pyx_t_3 = __pyx_v_self->mat;

属于（双*）类型。

为什么会出现这个错误：

error: incompatible types when assigning to type ‘__pyx_t_4kivy_8graphics_14transformation_matrix_t’ from type ‘double *’

被抚养长大？

编译器似乎没有将matrix\u t的类型识别为double*。

Answer 1

只是遇到了同样的错误。使用Cython 0.17.1可以帮助我：

sudo pip install Cython==0.17.1

如果你不只是想解决问题，你可以深入检查这两个版本之间的变化。 https://github.com/cython/cython/blob/master/CHANGES.rst#0172-2012-11-20-在这里你可以找到相关的问题，但不幸的是，我不是C/Cython的专家，快速浏览master和0.17.1之间的差异并没有告诉我问题在哪里，但如果你希望你可以自己调查问题。

Answer 2

我也有同样的错误。我找到了一个小例子，并向Cython邮件列表发送了一封电子邮件：https://groups.google.com/forum/?fromgroups=#!topic/cython-users/fSZgHqrlCOc