fatal error: byteswap.h: No such file or directory

$ pip install git+https://github.com/TadaoYamaoka/creversi
Collecting git+https://github.com/TadaoYamaoka/creversi
  Cloning https://github.com/TadaoYamaoka/creversi to /private/var/folders/hl/xrycfdz539d79hms3cqm94tr0000gn/T/pip-req-build-joxvj3kl
  Running command git clone -q https://github.com/TadaoYamaoka/creversi /private/var/folders/hl/xrycfdz539d79hms3cqm94tr0000gn/T/pip-req-build-joxvj3kl
Building wheels for collected packages: creversi
  Building wheel for creversi (setup.py) ... error
  ERROR: Complete output from command /anaconda3/bin/python -u -c 'import setuptools, tokenize;__file__='"'"'/private/var/folders/hl/xrycfdz539d79hms3cqm94tr0000gn/T/pip-req-build-joxvj3kl/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d /private/var/folders/hl/xrycfdz539d79hms3cqm94tr0000gn/T/pip-wheel-cocr_r6e --python-tag cp37:
  ERROR: running bdist_wheel
  running build
  running build_py
  creating build
  creating build/lib.macosx-10.7-x86_64-3.7
  creating build/lib.macosx-10.7-x86_64-3.7/creversi
  copying creversi/__init__.py -> build/lib.macosx-10.7-x86_64-3.7/creversi
  copying creversi/GGF.py -> build/lib.macosx-10.7-x86_64-3.7/creversi
  creating build/lib.macosx-10.7-x86_64-3.7/creversi/gym_reversi
  copying creversi/gym_reversi/__init__.py -> build/lib.macosx-10.7-x86_64-3.7/creversi/gym_reversi
  creating build/lib.macosx-10.7-x86_64-3.7/creversi/gym_reversi/envs
  copying creversi/gym_reversi/envs/__init__.py -> build/lib.macosx-10.7-x86_64-3.7/creversi/gym_reversi/envs
  running build_ext
  cythoning creversi/creversi.pyx to creversi/creversi.cpp
  /anaconda3/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: /private/var/folders/hl/xrycfdz539d79hms3cqm94tr0000gn/T/pip-req-build-joxvj3kl/creversi/creversi.pyx
    tree = Parsing.p_module(s, pxd, full_module_name)
  building 'creversi.creversi' extension
  creating build/temp.macosx-10.7-x86_64-3.7
  creating build/temp.macosx-10.7-x86_64-3.7/creversi
  creating build/temp.macosx-10.7-x86_64-3.7/creversi_cpp
  gcc -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I/anaconda3/include -arch x86_64 -I/anaconda3/include -arch x86_64 -Icreversi_cpp -I/anaconda3/lib/python3.7/site-packages/numpy/core/include -I/anaconda3/include/python3.7m -c creversi/creversi.cpp -o build/temp.macosx-10.7-x86_64-3.7/creversi/creversi.o -std=c++11 -msse4.2 -mbmi -mbmi2 -mavx2
  cc1plus: warning: command line option '-Wstrict-prototypes' is valid for C/ObjC but not for C++
  In file included from /anaconda3/lib/python3.7/site-packages/numpy/core/include/numpy/ndarraytypes.h:1824,
                   from /anaconda3/lib/python3.7/site-packages/numpy/core/include/numpy/ndarrayobject.h:12,
                   from /anaconda3/lib/python3.7/site-packages/numpy/core/include/numpy/arrayobject.h:4,
                   from creversi/creversi.cpp:633:
  /anaconda3/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]
     17 | #warning "Using deprecated NumPy API, disable it with " \
        |  ^~~~~~~
  In file included from creversi_cpp/utils.hpp:7,
                   from creversi/creversi.cpp:635:
  creversi_cpp/board.hpp:46:10: fatal error: byteswap.h: No such file or directory
     46 | #include <byteswap.h>
        |          ^~~~~~~~~~~~
  compilation terminated.
  error: command 'gcc' failed with exit status 1
  ----------------------------------------
  ERROR: Failed building wheel for creversi
  Running setup.py clean for creversi
Failed to build creversi

diff --git a/creversi_cpp/board.hpp b/creversi_cpp/board.hpp
index bdd90f6..1cf6f24 100644
--- a/creversi_cpp/board.hpp
+++ b/creversi_cpp/board.hpp
@@ -43,8 +43,9 @@ unsigned char _bittestandreset64(long long *a, long long b)
 #define _mm256_set_m128i(v0, v1)  _mm256_insertf128_si256(_mm256_castsi128_si256(v1), (v0), 1)
 #define _mm256_setr_m128i(v0, v1) _mm256_set_m128i((v1), (v0))

-#include <byteswap.h>
-#define _byteswap_uint64(x) bswap_64(x)
+#include <machine/endian.h>
+//#include <byteswap.h>
+#define _byteswap_uint64(x) _bswap64(x)

 #define _rotr64 __rorq
 #endif