Aug 13, 2017 · The missed symbol is the destructor of the class TestClass. Your shared library provides two symbols for the TestClass: But both these symbols are constructors (I don't fully understand why there are two and why both symbols have the same address) and none of them is the needed destructor.

The cythonize helper function is smart enough to distinguish plain .c sources from Cython sources that it needs to pass through the Cython compiler. It will then pass all the resulting C sources through the C compiler and link them.

Dec 20, 2012 · I suggest you use a different name for your cython module, e.g. cFoo, to avoid the name collision issue: from distutils.core import setup from Cython.Build import cythonize setup(ext_modules = cythonize( "cFoo.pyx", # our Cython source sources=["Foo.cpp"], # additional source file(s) language="c++", # generate C++ code ))

Cython supports transparent compiling of the cython code in a function using the @cython.compile decorator: @cython . compile def plus ( a , b ): return a + b Parameters of the decorated function cannot have type declarations.

Cython does exactly that and if you don't need to call it from c than just import compiled cython module and that's it. Try to follow this page https://cython.readthedocs.io/en/latest/src/tutorial/cython_tutorial.html

Mar 28, 2019 · To export DLL or so library symbols correctly cdef public api char* __stdcall hello(char* url): return requests.get(url).text cythonize -a -i -3 a.pyx On this command line, how do I add compiler options and def files?

Jun 9, 2021 · After recent update to gcc I am getting missing symbols when trying to load the .so generated by cython. In particular I am getting throw_bad_array_new_lengthv . After downgrading to gcc 10.2.0 the error disappears.

Pure Python syntax which allows static Cython type declarations in pure Python code, following PEP-484 type hints and PEP 526 variable annotations. If you use the pure Python syntax we strongly recommend you use a recent Cython 3 release, since significant improvements have been made here compared to the 0.29.x releases.

Feb 22, 2017 · It depends on what symbol is undefined. You can use libraries and library_dirs as arguments to Extension to specify what to link to. But there's lots of possible was of getting undefined symbols so right now it isn't answerable.

Jul 21, 2011 · an ImportError:undefined symbol. i can not figure out where is the problem, some one can help me ? the localmemcache project: http://localmemcache.rubyforge.org/