installation error in ubuntu

[HymEric]

When I install pyflow in ubuntu, it happen

(pytorch100) hym@VIPA109:~/pycharm_remote/pyflow-master$ python setup.py build_ext -i
Compiling pyflow.pyx because it changed.
[1/1] Cythonizing pyflow.pyx
/home/disk1/hym/anaconda3/envs/pytorch100/lib/python3.7/site-packages/Cython/Compiler/Main.py:367: FutureWarning: Cython directive 'language_level' not set, using 2 for now (Py2). This will change in a later release! File: /home/disk1/hym/pycharm_remote/pyflow-master/pyflow.pyx
tree = Parsing.p_module(s, pxd, full_module_name)
running build_ext
building 'pyflow' extension
creating build
creating build/temp.linux-x86_64-3.7
creating build/temp.linux-x86_64-3.7/src
gcc -pthread -B /home/disk1/hym/anaconda3/envs/pytorch100/compiler_compat -Wl,--sysroot=/ -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/home/disk1/hym/anaconda3/envs/pytorch100/lib/python3.7/site-packages/numpy/core/include -I/home/disk1/hym/anaconda3/envs/pytorch100/lib/python3.7/site-packages/numpy/core/include -I/home/disk1/hym/anaconda3/envs/pytorch100/include/python3.7m -c pyflow.cpp -o build/temp.linux-x86_64-3.7/pyflow.o
cc1plus: warning: command line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++ [enabled by default]
In file included from pyflow.cpp:29:0:
/home/disk1/hym/anaconda3/envs/pytorch100/include/python3.7m/Python.h:14:2: error: #error "Something's broken. UCHAR_MAX should be defined in limits.h."
#error "Something's broken. UCHAR_MAX should be defined in limits.h."
^
/home/disk1/hym/anaconda3/envs/pytorch100/include/python3.7m/Python.h:18:2: error: #error "Python's source code assumes C's unsigned char is an 8-bit type."
#error "Python's source code assumes C's unsigned char is an 8-bit type."
^
In file included from /home/disk1/hym/anaconda3/envs/pytorch100/lib/python3.7/site-packages/numpy/core/include/numpy/ndarraytypes.h:1824:0,
from /home/disk1/hym/anaconda3/envs/pytorch100/lib/python3.7/site-packages/numpy/core/include/numpy/ndarrayobject.h:12,
from /home/disk1/hym/anaconda3/envs/pytorch100/lib/python3.7/site-packages/numpy/core/include/numpy/arrayobject.h:4,
from pyflow.cpp:632:
/home/disk1/hym/anaconda3/envs/pytorch100/lib/python3.7/site-packages/numpy/core/include/numpy/npy_1_7_deprecated_api.h:17:2: warning: #warning "Using deprecated NumPy API, disable it with " "#define NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION" [-Wcpp]
#warning "Using deprecated NumPy API, disable it with "
^
In file included from /usr/include/stdio.h:74:0,
from /home/disk1/hym/anaconda3/envs/pytorch100/include/python3.7m/Python.h:25,
from pyflow.cpp:29:
/usr/include/libio.h:306:3: error: ‘size_t’ does not name a type
size_t __pad5;
^
/usr/include/libio.h:310:67: error: ‘size_t’ was not declared in this scope
char _unused2[15 * sizeof (int) - 4 * sizeof (void *) - sizeof (size_t)];
^
/usr/include/libio.h:338:62: error: ‘size_t’ has not been declared
typedef __ssize_t __io_read_fn (void *__cookie, char *__buf, size_t __nbytes);
^
/usr/include/libio.h:347:6: error: ‘size_t’ has not been declared
size_t __n);
^
In file included from /usr/include/stdio.h:74:0,
from /home/disk1/hym/anaconda3/envs/pytorch100/include/python3.7m/Python.h:25,
from pyflow.cpp:29:
...............
Please,if u know why, tell e solution?