[英]Importerror dlopen () symbol not found expected in flat namespace
[英]Symbol not found, Expected in: flat namespace
我有一個巨大的gl.pxd
文件,其中包含gl.h
, glu.h
和glut.h
所有定義。 例如,它有以下這些行:
cdef extern from '<OpenGL/gl.h>':
ctypedef unsigned int GLenum
cdef void glBegin( GLenum mode )
我有一個window.pyx
文件,如下所示:
# Import OpenGL definitions
# headers of gl, glu and glut
from gl cimport *
cdef int argcp
cdef char **argv
cdef void render_scene():
glClear( GL_COLOR_BUFFER_BIT )
glBegin( GL_TRIANGLES )
glVertex2f( -.5, -.5)
glVertex2f( .5, 0 )
glVertex2f( 0, -5. )
glEnd()
glutSwapBuffers()
cpdef main():
# Initialize GLUT and create Window
glutInit( &argcp, argv )
glutInitDisplayMode( GLUT_RGBA | GLUT_DOUBLE )
glutInitWindowPosition( 100, 100 )
glutInitWindowSize( 1280, 720 )
glutCreateWindow( 'My Shiny New Window' )
# Register callbacks
glutDisplayFunc( render_scene )
# Enter GLUT event processing cycle
glutMainLoop()
我也有一個setup.py
,如下所示:
from distutils.core import setup
from distutils.extension import Extension
from Cython.Distutils import build_ext
setup(
cmdclass = {'build_ext': build_ext},
ext_modules = [Extension('window', ['window.pyx'])]
)
我用python3 setup.py build_ext --inplace
調用它並編譯,輸出是這樣的:
running build_ext
cythoning window.pyx to window.c
building 'window' extension
/usr/bin/clang -fno-strict-aliasing -fno-common -dynamic -DNDEBUG -g -O3 -arch i386 -arch x86_64 -I/Library/Frameworks/Python.framework/Versions/3.3/include/python3.3m -c window.c -o build/temp.macosx-10.6-intel-3.3/window.o
/usr/bin/clang -bundle -undefined dynamic_lookup -arch i386 -arch x86_64 -g build/temp.macosx-10.6-intel-3.3/window.o -o /Users/petervaro/cygl/window.so
我有一個window_test.py
,如下所示:
import window
window.main()
但是,如果我想運行這個python代碼段,我得到了這個錯誤:
Traceback (most recent call last):
File "/Users/petervaro/cygl/window_test.py", line 3, in <module>
import window
ImportError: dlopen(/Users/petervaro/cygl/window.so, 2): Symbol not found: _glBegin
Referenced from: /Users/petervaro/cygl/window.so
Expected in: flat namespace
in /Users/petervaro/cygl/window.so
我的問題與此問題非常類似: 導入Cython生成的.so文件時,此ImportError的含義是什么? - 雖然afaik我沒有外部庫,但我想使用內置的 OpenGL庫...
哦,我使用的是Mac OS X 10.8.5,Cython 19.2和Python 3.3。 任何幫助將不勝感激!
提前致謝!
盡管OpenGL和GLUT在系統上( 內置 )我必須在編譯過程中將它們作為框架鏈接,因此setup.py
應如下所示:
from distutils.core import setup
from distutils.extension import Extension
from Cython.Build import cythonize
exts = Extension( name='window',
sources=['window.pyx'],
extra_link_args=['-framework', 'OpenGL', '-framework', 'GLUT'])
setup( name='cygl',
ext_modules = cythonize( exts ))
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