I recently wanted to cimport sage.rings.number_field.number_field_element_quadratic from the a cython cell in notebook, but was met with gcc compilation errors. This is because that file is a c++ module.
So I am wondering, is there is a way to use the c++ functionality of cython from within a notebook cell?
On my installation, in a notebook cell:
%cython
cimport sage.rings.number_field.number_field_element_quadratic
yields
[...]code_sage4_spyx_0.c:644:14: error: field __pyx___numerator has incomplete type
[...]code_sage4_spyx_0.c:645:13: error: field __pyx___denominator has incomplete type
[...]code_sage4_spyx_0.c:1090:13: error: field x has incomplete type
[...]code_sage4_spyx_0.c:1356:14: error: field x has incomplete type
error: command 'gcc' failed with exit status 1
but adding the magic commentbelow (see http://wiki.sagemath.org/faq) makes gcc quite happy:
%cython
#clang c++
cimport sage.rings.number_field.number_field_element_quadratic
Asked: 2013-02-27 18:34:01 +0100
Seen: 595 times
Last updated: Feb 28 '13
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1) How did you install Sage? (compiling from source, downloading a binary, on a notebook server) 2) Do you have a c++ compiler installed on your system?
Compiled from source (which implies that I have a c++ compiler), I just never really use the notebook interface.