mesh_core_cython.cpp:609:10: fatal error: 'ios' file not found

[Watebear]

When I use the command "python3 setup.py build_ext -I" , the error was threw as follows:

warning: include path for stdlibc++ headers not found; pass '-stdlib=libc++' on
the command line to use the libc++ standard library instead
[-Wstdlibcxx-not-found]
In file included from mesh_core_cython.cpp:607:
In file included from /anaconda3/envs/py36/lib/python3.6/site-packages/numpy/core/include/numpy/arrayobject.h:4:
In file included from /anaconda3/envs/py36/lib/python3.6/site-packages/numpy/core/include/numpy/ndarrayobject.h:12:
In file included from /anaconda3/envs/py36/lib/python3.6/site-packages/numpy/core/include/numpy/ndarraytypes.h:1824:
/anaconda3/envs/py36/lib/python3.6/site-packages/numpy/core/include/numpy/npy_1_7_deprecated_api.h:17:2: warning:
"Using deprecated NumPy API, disable it with " "#define
NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION" [-W#warnings]
#warning "Using deprecated NumPy API, disable it with "
^
mesh_core_cython.cpp:609:10: fatal error: 'ios' file not found
#include "ios"
^~~~~
2 warnings and 1 error generated.

There is little methods to solve this question. Help me, please.

[cleardusk]

Sorry, I can not reproduce your error. Please check your dependencies first.

[liguohao96]

If you are using mac, try add extra_compile_args=['-std=c++11', '-D_hypot=hypot', '-stdlib=libc++'] in args of 'Extension' in setup.py.

'-std=c++11', '-D_hypot=hypot' is not required, but they could avoid another problem.

[asd25898636]

@liguohao96 hi there, after i add extra_compile_args=['-std=c++11', '-D_hypot=hypot', '-stdlib=libc++'] in args of 'Extension' in setup.py.
it says:
------------------- log-------------------------
skipping 'mesh_core_cython.cpp' Cython extension (up-to-date)
building 'mesh_core_cython' extension
gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I/Users/qifeng/anaconda3/envs/py36/include -arch x86_64 -I/Users/qifeng/anaconda3/envs/py36/include -arch x86_64 -I/Users/qifeng/anaconda3/envs/py36/lib/python3.6/site-packages/numpy/core/include -I/Users/qifeng/anaconda3/envs/py36/include/python3.6m -c mesh_core_cython.cpp -o build/temp.macosx-10.7-x86_64-3.6/mesh_core_cython.o -D_hypot=hypot -stdlib=libc++
In file included from mesh_core_cython.cpp:607:
In file included from /Users/qifeng/anaconda3/envs/py36/lib/python3.6/site-packages/numpy/core/include/numpy/arrayobject.h:4:
In file included from /Users/qifeng/anaconda3/envs/py36/lib/python3.6/site-packages/numpy/core/include/numpy/ndarrayobject.h:12:
In file included from /Users/qifeng/anaconda3/envs/py36/lib/python3.6/site-packages/numpy/core/include/numpy/ndarraytypes.h:1824:
/Users/qifeng/anaconda3/envs/py36/lib/python3.6/site-packages/numpy/core/include/numpy/npy_1_7_deprecated_api.h:17:2: warning:
"Using deprecated NumPy API, disable it with " "#define
NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION" [-W#warnings]
#warning "Using deprecated NumPy API, disable it with "
^
1 warning generated.
gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I/Users/qifeng/anaconda3/envs/py36/include -arch x86_64 -I/Users/qifeng/anaconda3/envs/py36/include -arch x86_64 -I/Users/qifeng/anaconda3/envs/py36/lib/python3.6/site-packages/numpy/core/include -I/Users/qifeng/anaconda3/envs/py36/include/python3.6m -c mesh_core.cpp -o build/temp.macosx-10.7-x86_64-3.6/mesh_core.o -D_hypot=hypot -stdlib=libc++
g++ -bundle -undefined dynamic_lookup -L/Users/qifeng/anaconda3/envs/py36/lib -arch x86_64 -L/Users/qifeng/anaconda3/envs/py36/lib -arch x86_64 -arch x86_64 build/temp.macosx-10.7-x86_64-3.6/mesh_core_cython.o build/temp.macosx-10.7-x86_64-3.6/mesh_core.o -o /Users/qifeng/Documents/work/3DDFA/utils/cython/mesh_core_cython.cpython-36m-darwin.so
clang: warning: libstdc++ is deprecated; move to libc++ with a minimum deployment target of OS X 10.9 [-Wdeprecated]
ld: library not found for -lstdc++
clang: error: linker command failed with exit code 1 (use -v to see invocation)
error: command 'g++' failed with exit status 1

[liguohao96]

@asd25898636 it seems that Apple replaced libstdc++ with libc++, try using libc++?

[asd25898636]

@liguohao96 thx alot! i've solved it~ but it seems like MacOS 10.10+ cause this kind of problem, so i change 'Extension' in setup.py:
------------------------setup.py:-----------------------------
from distutils.core import setup, Extension
from Cython.Distutils import build_ext
import numpy

setup(
name='mesh_core_cython',
cmdclass={'build_ext': build_ext},
ext_modules=[Extension("mesh_core_cython",
sources=["mesh_core_cython.pyx", "mesh_core.cpp"],
language='c++',
extra_compile_args=['-stdlib=libc++', '-mmacosx-version-min=10.9','-std=c++11', '-D_hypot=hypot'],
extra_link_args=['-stdlib=libc++', '-mmacosx-version-min=10.9','-std=c++11', '-D_hypot=hypot'],
include_dirs=[numpy.get_include()])],
)
---------------------------------setup.py---------------------------------------
thx again!

[cleardusk]

Solved, thanks for @liguohao96 .

[Jian-danai]

Then how to solve it in Linux

[Andyzzz]

Thanks a lot