Xcode 10.1 error when compiling C++ files

I have a file abc.pyx that starts:

# distutils: language=c++

(because I am using vector).

This file compiled fine until I upgraded to Xcode 10.1 (10B61). I now get the following error:

warning: include path for stdlibc++ headers not found; pass '-std=libc++' on the command line to use the libc++ standard
      library instead [-Wstdlibcxx-not-found]
abc.cpp:636:10: fatal error: 'ios' file not found
#include "ios"
         ^~~~~
1 warning and 1 error generated.
error: command 'gcc' failed with exit status 1

All of my pyx files that are compiled using C instead of C++ are compiling correctly.

I am using Cython 0.29 in an Anaconda environment with Python 3.6.2 on macOS Mojave 10.14.1.

Python 3.6.2 |Continuum Analytics, Inc.| (default, Jul 20 2017, 13:14:59) 
[GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.57)] on darwin

My setup.py looks like:

setup(ext_modules=cythonize[(abc.pyx)])

I am building using the following command:

python setup.py build_ext --inplace
python setup.py install

Any suggestions would be greatly appreciated. Is there any way I can pass a compiler option to just those files?

This StackOverflow response is close, but I don’t want to compile all of my pyx files into C++. I tried that, but got other errors. It would be simplest if I could just resolve the issue of this single file.

[jsawruk]

This issue was resolved by upgrading to the Xcode Command Line Tools 10.1, released on November 2, 2018.

[joshlk]

Originally posted by @TruongKhang in https://github.com/coccoc/coccoc-tokenizer/issues/5#issuecomment-504321367_

The setup.py file should be changed to something like:

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

import os
os.environ['CC'] = 'g++'
os.environ['CXX'] = 'g++'

ext_modules = [
    Extension(
        name="CocCocTokenizer",
        sources=["CocCocTokenizer.pyx"],
        extra_compile_args=["-Wno-cpp", "-Wno-unused-function", "-O2", "-march=native", '-stdlib=libc++', '-std=c++11'],
        extra_link_args=["-O2", "-march=native", '-stdlib=libc++'],
        language="c++",
        include_dirs=["."],
    )
]

setup(
    name="coccoc-tokenizer", ext_modules=ext_modules, cmdclass={"build_ext": build_ext}
)