[FIXED] How to specify -march=native with %%cython

Issue

In ipython I can do the following:

%%cython --compile-args=-Ofast
def f(x):
    return 2.0*x

But how can I add -march=native as well?

Solution

The --compile-args flag can be passed several times, as can be seen in the help by running %%cython? in a notebook cell:

-c COMPILE_ARGS, --compile-args COMPILE_ARGS
                    Extra flags to pass to compiler via the
                    `extra_compile_args` Extension flag (can be specified
                    multiple times).

The final answer would therefore be:

%%cython --compile-args=-Ofast --compile-args=-march=native

def f(x):
    return 2.0*x

Answered By - Seon