Cython Issue compiling example 05-opengl

[tkothadev]

Hello,

Thanks for making this repo!

I was able to successfully compile 3.6.13, and to my understanding, what this does is compile a wasm library of python which can then be compiled as a bundled interpreter in the example main c code for the opengl demo.

I tried compiling it using my system python's cython (my system python is 3.10, but I'm not sure if I should be using the host python instead), but it seems to have problems compiling the sdl2.pyx file. I suspect that it's unable to find the other definition files for some reason, but it's not clear how or why.

I will post my error message in the comments below

[tkothadev]

➜ make
python -m cython app/sdl2.pyx
/home/code/.local/lib/python3.10/site-packages/Cython/Compiler/Main.py:381: FutureWarning: Cython directive 'language_level' not set, using '3str' for now (Py3). This has changed from earlier releases! File: /home/code/cpython-emscripten/examples/05-opengl/app/sdl2.pyx
  tree = Parsing.p_module(s, pxd, full_module_name)

Error compiling Cython file:
------------------------------------------------------------
...
cimport sdl2_defs as defs
        ^
------------------------------------------------------------

app/sdl2.pyx:1:8: 'sdl2_defs.pxd' not found

Error compiling Cython file:
------------------------------------------------------------
...
SDL_GL_CONTEXT_MAJOR_VERSION = defs.SDL_GL_CONTEXT_MAJOR_VERSION
SDL_GL_CONTEXT_MINOR_VERSION = defs.SDL_GL_CONTEXT_MINOR_VERSION


cdef class SDL_Window(object):
    cdef defs.SDL_Window *inst
         ^
------------------------------------------------------------

app/sdl2.pyx:16:9: 'SDL_Window' is not a type identifier

Error compiling Cython file:
------------------------------------------------------------
...
cdef class SDL_Window(object):
    cdef defs.SDL_Window *inst


cdef class SDL_GLContext(object):
    cdef defs.SDL_GLContext inst
         ^
------------------------------------------------------------

app/sdl2.pyx:20:9: 'SDL_GLContext' is not a type identifier

Error compiling Cython file:
------------------------------------------------------------
...
cimport sdl2_defs as defs


SDL_INIT_VIDEO = defs.SDL_INIT_VIDEO
                     ^
------------------------------------------------------------

app/sdl2.pyx:4:21: cimported module has no attribute 'SDL_INIT_VIDEO'

Error compiling Cython file:
------------------------------------------------------------
...
cimport sdl2_defs as defs


SDL_INIT_VIDEO = defs.SDL_INIT_VIDEO

SDL_WINDOW_OPENGL = defs.SDL_WINDOW_OPENGL
                        ^
------------------------------------------------------------

app/sdl2.pyx:6:24: cimported module has no attribute 'SDL_WINDOW_OPENGL'

Error compiling Cython file:
------------------------------------------------------------
...


SDL_INIT_VIDEO = defs.SDL_INIT_VIDEO

SDL_WINDOW_OPENGL = defs.SDL_WINDOW_OPENGL
SDL_WINDOW_SHOWN = defs.SDL_WINDOW_SHOWN
                       ^
------------------------------------------------------------

app/sdl2.pyx:7:23: cimported module has no attribute 'SDL_WINDOW_SHOWN'

Error compiling Cython file:
------------------------------------------------------------
...
SDL_INIT_VIDEO = defs.SDL_INIT_VIDEO

SDL_WINDOW_OPENGL = defs.SDL_WINDOW_OPENGL
SDL_WINDOW_SHOWN = defs.SDL_WINDOW_SHOWN

SDL_GL_DOUBLEBUFFER = defs.SDL_GL_DOUBLEBUFFER
                          ^
------------------------------------------------------------

app/sdl2.pyx:9:26: cimported module has no attribute 'SDL_GL_DOUBLEBUFFER'

Error compiling Cython file:
------------------------------------------------------------
...

SDL_WINDOW_OPENGL = defs.SDL_WINDOW_OPENGL
SDL_WINDOW_SHOWN = defs.SDL_WINDOW_SHOWN

SDL_GL_DOUBLEBUFFER = defs.SDL_GL_DOUBLEBUFFER
SDL_GL_DEPTH_SIZE = defs.SDL_GL_DEPTH_SIZE
                        ^
------------------------------------------------------------

app/sdl2.pyx:10:24: cimported module has no attribute 'SDL_GL_DEPTH_SIZE'

Error compiling Cython file:
------------------------------------------------------------
...
SDL_WINDOW_OPENGL = defs.SDL_WINDOW_OPENGL
SDL_WINDOW_SHOWN = defs.SDL_WINDOW_SHOWN

SDL_GL_DOUBLEBUFFER = defs.SDL_GL_DOUBLEBUFFER
SDL_GL_DEPTH_SIZE = defs.SDL_GL_DEPTH_SIZE
SDL_GL_CONTEXT_MAJOR_VERSION = defs.SDL_GL_CONTEXT_MAJOR_VERSION
                                   ^
------------------------------------------------------------

app/sdl2.pyx:11:35: cimported module has no attribute 'SDL_GL_CONTEXT_MAJOR_VERSION'

Error compiling Cython file:
------------------------------------------------------------
...
SDL_WINDOW_SHOWN = defs.SDL_WINDOW_SHOWN

SDL_GL_DOUBLEBUFFER = defs.SDL_GL_DOUBLEBUFFER
SDL_GL_DEPTH_SIZE = defs.SDL_GL_DEPTH_SIZE
SDL_GL_CONTEXT_MAJOR_VERSION = defs.SDL_GL_CONTEXT_MAJOR_VERSION
SDL_GL_CONTEXT_MINOR_VERSION = defs.SDL_GL_CONTEXT_MINOR_VERSION
                                   ^
------------------------------------------------------------

app/sdl2.pyx:12:35: cimported module has no attribute 'SDL_GL_CONTEXT_MINOR_VERSION'

Error compiling Cython file:
------------------------------------------------------------
...

def SDL_GL_SwapWindow(window):
    defs.SDL_GL_SwapWindow((<SDL_Window?>window).inst)


GL_COLOR_BUFFER_BIT = defs.GL_COLOR_BUFFER_BIT
                          ^
------------------------------------------------------------

app/sdl2.pyx:51:26: cimported module has no attribute 'GL_COLOR_BUFFER_BIT'

Error compiling Cython file:
------------------------------------------------------------
...
cdef class SDL_GLContext(object):
    cdef defs.SDL_GLContext inst


def SDL_Init(flags):
    return defs.SDL_Init(flags)
               ^
------------------------------------------------------------

app/sdl2.pyx:24:15: cimported module has no attribute 'SDL_Init'

Error compiling Cython file:
------------------------------------------------------------
...
    return defs.SDL_Init(flags)


cpdef SDL_CreateWindow(title, x, y, w, h, flags):
    cdef SDL_Window result = SDL_Window()
    result.inst = defs.SDL_CreateWindow(title, x, y, w, h, flags)
                      ^
------------------------------------------------------------

app/sdl2.pyx:29:22: cimported module has no attribute 'SDL_CreateWindow'

Error compiling Cython file:
------------------------------------------------------------
...
    result.inst = defs.SDL_CreateWindow(title, x, y, w, h, flags)
    return result


def SDL_GL_SetAttribute(attr, value):
    return defs.SDL_GL_SetAttribute(attr, value)
               ^
------------------------------------------------------------

app/sdl2.pyx:34:15: cimported module has no attribute 'SDL_GL_SetAttribute'

Error compiling Cython file:
------------------------------------------------------------
...
def SDL_GL_SetAttribute(attr, value):
    return defs.SDL_GL_SetAttribute(attr, value)


def SDL_GL_SetSwapInterval(interval):
    return defs.SDL_GL_SetSwapInterval(interval)
               ^
------------------------------------------------------------

app/sdl2.pyx:38:15: cimported module has no attribute 'SDL_GL_SetSwapInterval'

Error compiling Cython file:
------------------------------------------------------------
...
    return defs.SDL_GL_SetSwapInterval(interval)


def SDL_GL_CreateContext(window):
    cdef SDL_GLContext result = SDL_GLContext()
    result.inst = defs.SDL_GL_CreateContext((<SDL_Window?>window).inst)
                      ^
------------------------------------------------------------

app/sdl2.pyx:43:22: cimported module has no attribute 'SDL_GL_CreateContext'

Error compiling Cython file:
------------------------------------------------------------
...
    result.inst = defs.SDL_GL_CreateContext((<SDL_Window?>window).inst)
    return result


def SDL_GL_SwapWindow(window):
    defs.SDL_GL_SwapWindow((<SDL_Window?>window).inst)
        ^
------------------------------------------------------------

app/sdl2.pyx:48:8: cimported module has no attribute 'SDL_GL_SwapWindow'

Error compiling Cython file:
------------------------------------------------------------
...

GL_COLOR_BUFFER_BIT = defs.GL_COLOR_BUFFER_BIT


def glClearColor(r, g, b, a):
    defs.glClearColor(r, g, b, a)
        ^
------------------------------------------------------------

app/sdl2.pyx:55:8: cimported module has no attribute 'glClearColor'

Error compiling Cython file:
------------------------------------------------------------
...
def glClearColor(r, g, b, a):
    defs.glClearColor(r, g, b, a)


def glClear(bits):
    defs.glClear(bits)
        ^
------------------------------------------------------------

app/sdl2.pyx:59:8: cimported module has no attribute 'glClear'

Error compiling Cython file:
------------------------------------------------------------
...


def main_loop(callback):
    global loop_callback
    loop_callback = callback
    defs.main_loop(loop_thunk)
        ^
------------------------------------------------------------

app/sdl2.pyx:72:8: cimported module has no attribute 'main_loop'
make: *** [Makefile:26: app/sdl2.c] Error 1

[tkothadev]

this is what the makefile looked like at the time
makefile.txt