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如何正確包含my_math/clog.h包my_math讓tox通過py.test套件？如何正確包含Cython頭文件（setup.py）？
項目文件結構：
my_math/__init__.py
my_math/clog.h
my_math/clog.pxd
my_math/integrate.pyx
setup.py
tests/__init__.py
tests/test_log.py
tox.ini
my_math/clog.h
#include <python.h>
#include <math.h>
#if PY_VERSION_HEX < 0x3050000 && (defined(_WIN32) || defined(_WIN64))
// Calculates log2 of number
double log2(double n);
{
// log(n)/log(2) is log2
double log_2 = 0.693147180559945309417232121458176568075500134360255254120680;
return log(n)/log_2;
}
#endif
my_math/integrate.pyx
def extern from "clog.h":
double log2(double)
def call_log2(n):
return log2(n)
個setup.py
import os
from setuptools import setup, Extension
from setuptools.dist import Distribution
from Cython.Distutils import build_ext
Distribution(dict(setup_requires='Cython'))
ext_modules = [
Extension("my_math.integrate", ["my_math/integrate.pyx"],
include_dirs=['my_math'], # path to .h file(s)
library_dirs=['my_math'], # path to .a or .so file(s)
# libraries=['clog'],
extra_compile_args = ['-I/usr/local/include',
'-L/usr/local/lib'],
depends=['my_math/clog.h']
)
]
setup(
name='my_math',
package_dir={'my_math': 'my_math'},
packages=['my_math'],
include_package_data=True,
package_data={'': ['*.pyx', '*.pxd', '*.h', '*.c']},
cmdclass = {'build_ext': build_ext},
ext_modules=ext_modules
)
測試/ test_log.py
from pytest import approx
from my_math.integrate import call_log2
def test_call_log2():
assert approx(call_log2(100)) == 6.64386
tox.ini
[tox]
envlist = py36
[testenv]
deps = cython
pytest
commands = python setup.py build_ext --inplace
py.test tests
my_math/__init__.py和tests/__init__.py是空的。
我跑python3 setup.py build_ext --inplace沒有任何毛刺。
我可以調用函數call_log2直接：
python3 -c 'from my_math.integrate import call_log2; print(call_log2(100))'
6.643856189774724
但不能與tox：
clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -Imy_math -I/usr/local/Cellar/python3/3.6.0/Frameworks/Python.framework/Versions/3.6/include/python3.6m -c my_math/integrate.c -o build/temp.macosx-10.11-x86_64-3.6/my_math/integrate.o -I/usr/local/include -L/usr/local/lib
clang: warning: argument unused during compilation: '-L/usr/local/lib'
my_math/integrate.c:432:10: fatal error: 'clog.h' file not found
#include "clog.h"
^
1 error generated.
error: command 'clang' failed with exit status 1
如果我取消# libraries = ['clog'],新鮮python3 setup.py build_ext --inplace會產生ld: library not found for -lclog錯誤。