无法安装Kivy: Cython/GCC错误
所以我试着按照官网的说明安装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。我还读了一些关于Cython的文章。
首先，所有的错误都是相同类型的：
error: incompatible types when assigning to type ‘__pyx_t_4kivy_8graphics_14transformation_matrix_t’ from type ‘double *’第一个错误出现在这里：
__pyx_t_3 = __pyx_v_self->mat;__pyx_t_3的类型为：
__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(__pyx_t_3) == type(matrix_t) == double *。
__pyx_v_self的类型为：
struct __pyx_obj_4kivy_8graphics_14transformation_Matrix *同样，它是从transformation.pxd生成的
ctypedef double matrix_t[16]
cdef class Matrix:
cdef matrix_t mat
...因此，双精度类型( type(__pyx_v_self->mat) == type，Matrix.mat)双精度类型( == type，matrix_t) == *
正如我们所看到的，任务的两个方面：
__pyx_t_3 = __pyx_v_self->mat;是(双*)类型的。
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 *’然后就被养大了？
看起来编译器没有将matrix_t的类型识别为double *。
回答 2
Stack Overflow用户
发布于 2012-11-21 14:35:02
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如果你不仅仅想修复问题，你可以深入了解一下这两个版本之间有什么变化。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，快速浏览一下master和0.17.1之间的差异并不能告诉我问题在哪里，但是如果你希望你可以自己调查这个问题。
Stack Overflow用户
发布于 2013-04-27 10:07:10
我也犯了同样的错误。我追踪到了一个小示例，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
https://stackoverflow.com/questions/13485364
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