Cython Troubleshooting
Following are solutions to common problems encountered while using Cython.
Linker error
If you have not specified all the libraries for the linker to resolve all the function calls in your code, you will get an error like the following (from Sage):
ImportError: /long/path.so: undefined symbol: function_name
The solution is to use the #clib pragma (credit to cwitty):
#clib library_with_useful_functions