I am clearly missing something very obvious but why does this happily
compile:
%cython
cdef extern from "mpfr.h":
ctypedef void* mpfr_t[1]
cdef int mpfr_init(mpfr_t)
cdef int mpfr_clear(mpfr_t)
def testmpfr(double x):
cdef mpfr_t input
mpfr_init(input)
mpfr_clear(input)
But this doesn't:
%cython
cdef extern from "mpfr.h":
ctypedef void* mpfr_t[1]
cdef extern from "mpc.h":
ctypedef void* mpc_t
ctypedef struct __mpc_struct:
mpfr_t re
mpfr_t im
ctypedef __mpc_struct* mpc_t
void mpc_init (mpc_t)
void mpc_clear (mpc_t)
def testmpc():
cdef mpc_t input
mpc_init(input)
mpc_clear(input)
This is the error message:
Traceback (click to the left of this block for traceback)
...
ImportError:
/home/martin/.sage//temp/Office/7219//spyx//
_home_martin__sage_sage_note\
book_sagenb_home_admin_24_code_sage73_spyx/
_home_martin__sage_sage_noteb\
ook_sagenb_home_admin_24_code_sage73_spyx_0.so: undefined symbol:
mpc_clear
The optional package mpc is installed and the MPComplex module works
fine.
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