Error compiling Cython file:
------------------------------------------------------------
...
from memory_allocator cimport MemoryAllocator
from sage.rings.real_double import RDF
from sage.libs.gsl.all cimport *
from sage.misc.sageinspect import sage_getargspec
from sage.ext.interpreters.wrapper_rdf cimport Wrapper_rdf
^
------------------------------------------------------------
sage/calculus/integration.pyx:35:0: 'sage/ext/interpreters/wrapper_rdf.pxd' not found
The
sage/ext/interpreters
folder is missing.