让distutils在正确的位置查找numpy头文件

Question

在我的安装中，numpyarrayobject.h位于…/site- packages/numpy/core/include/numpy/arrayobject.h。我编写了一个使用numpy的普通Cython脚本：

cimport numpy as np

def say_hello_to(name):
    print("Hello %s!" % name)

我还有以下distutils
setup.py（从Cython用户指南中复制）：

from distutils.core import setup
from distutils.extension import Extension
from Cython.Distutils import build_ext

ext_modules = [Extension("hello", ["hello.pyx"])]

setup(
  name = 'Hello world app',
  cmdclass = {'build_ext': build_ext},
  ext_modules = ext_modules
)

当我尝试使用构建时python setup.py build_ext --inplace，Cython尝试执行以下操作：

gcc -fno-strict-aliasing -Wno-long-double -no-cpp-precomp -mno-fused-madd \
-fno-common -dynamic -DNDEBUG -g -Os -Wall -Wstrict-prototypes -DMACOSX \
-I/usr/include/ffi -DENABLE_DTRACE -arch i386 -arch ppc -pipe \
-I/System/Library/Frameworks/Python.framework/Versions/2.5/include/python2.5 \
-c hello.c -o build/temp.macosx-10.5-i386-2.5/hello.o

可以预测，这找不到arrayobject.h。如何使distutils使用numpy包含文件的正确位置（而无需让用户定义$ CFLAGS）？

Answer 1

用途numpy.get_include()：

from distutils.core import setup
from distutils.extension import Extension
from Cython.Distutils import build_ext
import numpy as np                           # <---- New line

ext_modules = [Extension("hello", ["hello.pyx"],
                                  include_dirs=[get_numpy_include()])]   # <---- New argument

setup(
  name = 'Hello world app',
  cmdclass = {'build_ext': build_ext},       
  ext_modules = ext_modules
)