Cython 0.22 does not compile master

[matham]

Using cython dev from github:

e:\MinGW\bin\gcc.exe -shared -s build\temp.win32-2.7\Release\kivy\graphics\trans
formation.o build\temp.win32-2.7\Release\kivy\graphics\transformation.def -Le:\P
ython27\libs -Le:\Python27\PCbuild -lopengl32 -lglew32 -lpython27 -lmsvcr90 -o G
:\Python\dev2\kivy\kivy\graphics\transformation.pyd -lm
cythoning kivy\graphics/vbo.pyx to kivy\graphics\vbo.c

 Error compiling Cython file:
 ------------------------------------------------------------
 ...
     cpdef release(self)
     cpdef get_pixel_color(self, int wx, int wy)

     cdef void create_fbo(self)
     cdef void delete_fbo(self)
     cdef void apply(self)
                   ^
 ------------------------------------------------------------

 kivy\graphics\fbo.pxd:27:19: Signature not compatible with previous declaration


 Error compiling Cython file:
 ------------------------------------------------------------
 ...
     cdef void push_states(self, list names) except *
     cdef void pop_state(self, str name) except *
     cdef void pop_states(self, list names) except *
     cdef void enter(self) except *
     cdef void leave(self) except *
     cdef void apply(self) except *
                   ^
 ------------------------------------------------------------

 kivy\graphics\instructions.pxd:123:19: Previous declaration is here
building 'kivy.graphics.vbo' extension
e:\MinGW\bin\gcc.exe -mdll -O -Wall -Ie:\Python27\include -Ie:\Python27\PC -c ki
vy\graphics\vbo.c -o build\temp.win32-2.7\Release\kivy\graphics\vbo.o
kivy\graphics\vbo.c:1:2: error: #error Do not use this file, it is the result of
 a failed Cython compilation.
 #error Do not use this file, it is the result of a failed Cython compilation.
  ^
 error: command 'e:\\MinGW\\bin\\gcc.exe' failed with exit status 1
make: *** [force] Error 1

I think they most have become stricter about keeping function prototypes consistent.

[matham]

Upon typing them with except * I get:

cythoning kivy\graphics/fbo.pyx to kivy\graphics\fbo.c
building 'kivy.graphics.fbo' extension
e:\MinGW\bin\gcc.exe -mdll -O -Wall -Ie:\Python27\include -Ie:\Python27\PC -c ki
vy\graphics\fbo.c -o build\temp.win32-2.7\Release\kivy\graphics\fbo.o
In file included from kivy\graphics\fbo.c:237:0:
kivy\graphics\gl_redirect.h: In function 'glew_dynamic_binding':
kivy\graphics\gl_redirect.h:71:33: warning: pointer targets in initialization di
ffer in signedness [-Wpointer-sign]
     const char *gl_extensions = glGetString(GL_EXTENSIONS);
                                 ^
kivy\graphics\fbo.c: In function '__pyx_f_4kivy_8graphics_3fbo_3Fbo_apply':
kivy\graphics\fbo.c:4554:5: warning: implicit declaration of function '__pyx_f_4
kivy_8graphics_12instructions_13RenderContext_apply' [-Wimplicit-function-declar
ation]
     __pyx_f_4kivy_8graphics_12instructions_13RenderContext_apply(((struct __pyx
_obj_4kivy_8graphics_12instructions_RenderContext *)__pyx_v_self)); if (unlikely
(PyErr_Occurred())) {__pyx_filename = __pyx_f[0]; __pyx_lineno = 329; __pyx_clin
eno = __LINE__; goto __pyx_L1_error;}
     ^
kivy\graphics\fbo.c: In function '__Pyx_RaiseTooManyValuesError':
kivy\graphics\fbo.c:7397:18: warning: unknown conversion type character 'z' in f
ormat [-Wformat=]
                  "too many values to unpack (expected %" CYTHON_FORMAT_SSIZE_T
"d)", expected);
                  ^
kivy\graphics\fbo.c:7397:18: warning: too many arguments for format [-Wformat-ex
tra-args]
kivy\graphics\fbo.c: In function '__Pyx_RaiseNeedMoreValuesError':
kivy\graphics\fbo.c:7403:18: warning: unknown conversion type character 'z' in f
ormat [-Wformat=]
                  index, (index == 1) ? "" : "s");
                  ^
kivy\graphics\fbo.c:7403:18: warning: format '%s' expects argument of type 'char
 *', but argument 3 has type 'Py_ssize_t' [-Wformat=]
kivy\graphics\fbo.c:7403:18: warning: too many arguments for format [-Wformat-ex
tra-args]
kivy\graphics\fbo.c: In function '__Pyx_RaiseArgtupleInvalid':
kivy\graphics\fbo.c:7741:18: warning: unknown conversion type character 'z' in f
ormat [-Wformat=]
                  (num_expected == 1) ? "" : "s", num_found);
                  ^
kivy\graphics\fbo.c:7741:18: warning: format '%s' expects argument of type 'char
 *', but argument 5 has type 'Py_ssize_t' [-Wformat=]
kivy\graphics\fbo.c:7741:18: warning: unknown conversion type character 'z' in f
ormat [-Wformat=]
kivy\graphics\fbo.c:7741:18: warning: too many arguments for format [-Wformat-ex
tra-args]
writing build\temp.win32-2.7\Release\kivy\graphics\fbo.def
e:\MinGW\bin\gcc.exe -shared -s build\temp.win32-2.7\Release\kivy\graphics\fbo.o
 build\temp.win32-2.7\Release\kivy\graphics\fbo.def -Le:\Python27\libs -Le:\Pyth
on27\PCbuild -lopengl32 -lglew32 -lpython27 -lmsvcr90 -o G:\Python\dev2\kivy\kiv
y\graphics\fbo.pyd -lm
build\temp.win32-2.7\Release\kivy\graphics\fbo.o:fbo.c:(.text+0x5a9): undefined
reference to `__pyx_f_4kivy_8graphics_12instructions_13RenderContext_apply'
collect2.exe: error: ld returned 1 exit status
 error: command 'e:\\MinGW\\bin\\gcc.exe' failed with exit status 1
make: *** [force] Error 1

Which I don't understand. Maybe it's a bug with cython?

[tito]

You can fix the declaration if needed, or report to Cython dev itself. Opening an issue here is not entirely relevant as Cython in dev is not stable :)

[matham]

Reopening because this is now a issue with cython 0.22 on pip.

[matham]

Here's the cython bug report of this issue: https://groups.google.com/forum/#!topic/cython-users/r3dQSfOKMjI

[kived]

@matham, adding except * works on Linux. Could you check if my PR works for you on Windows? If it doesn't, there might be something specific to Windows we can fix to make it work with 0.22.

[kived]

Closing because we now refuse to build, with a helpful error message, on Cython 0.22 (and 0.22.alpha0, 0.22.beta0).

[tleeuwenburg]

Unfortunately, this is still affecting the macports version, which tries to use the latest cython, which is 0.22_0. From a developer perspective, I get it, but from a user perspective this is a big pain. I've commented on the cython bug also. I think Kivy is an excluded option for me until this is fixed.

[donpdonp]

I ran into the cython 0.22 build problem on ubuntu 15.04. quick fix is

$ pip install -I cython==0.21

[Kovak]

master should compile on cython .22 now, if you are using the last stable release you will need to use cython .21 I believe