Can't build on macOS
running develop
running egg_info
creating PyMetis.egg-info
writing PyMetis.egg-info/PKG-INFO
writing dependency_links to PyMetis.egg-info/dependency_links.txt
writing requirements to PyMetis.egg-info/requires.txt
writing top-level names to PyMetis.egg-info/top_level.txt
writing manifest file 'PyMetis.egg-info/SOURCES.txt'
reading manifest file 'PyMetis.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
warning: no files found matching 'import-metis.sh'
writing manifest file 'PyMetis.egg-info/SOURCES.txt'
running build_ext
creating var
creating var/folders
creating var/folders/6h
creating var/folders/6h/_9jy58ys59v0kv4sm2pds_3h0000gn
creating var/folders/6h/_9jy58ys59v0kv4sm2pds_3h0000gn/T
clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -fwrapv -Wall -O3 -DNDEBUG -I/Users/matt/env3.7-2/include -I/usr/local/Cellar/python/3.7.2_2/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c /var/folders/6h/_9jy58ys59v0kv4sm2pds_3h0000gn/T/tmp2w1skgrh.cpp -o var/folders/6h/_9jy58ys59v0kv4sm2pds_3h0000gn/T/tmp2w1skgrh.o -std=c++14
clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -fwrapv -Wall -O3 -DNDEBUG -I/Users/matt/env3.7-2/include -I/usr/local/Cellar/python/3.7.2_2/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c /var/folders/6h/_9jy58ys59v0kv4sm2pds_3h0000gn/T/tmpg9pmog63.cpp -o var/folders/6h/_9jy58ys59v0kv4sm2pds_3h0000gn/T/tmpg9pmog63.o -fvisibility=hidden
building 'pymetis._internal' extension
creating build
creating build/temp.macosx-10.14-x86_64-3.7
creating build/temp.macosx-10.14-x86_64-3.7/src
creating build/temp.macosx-10.14-x86_64-3.7/src/wrapper
creating build/temp.macosx-10.14-x86_64-3.7/src/metis
creating build/temp.macosx-10.14-x86_64-3.7/src/metis/GKlib
creating build/temp.macosx-10.14-x86_64-3.7/src/metis/libmetis
clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -fwrapv -Wall -O3 -DNDEBUG -DHAVE_MREMAP=0 -Isrc/metis/GKlib -Isrc/metis/include -Isrc/metis/libmetis -I/Users/matt/env3.7-2/include/site/python3.7 -I/Users/matt/env3.7-2/include/site/python3.7 -I/Users/matt/env3.7-2/include -I/usr/local/Cellar/python/3.7.2_2/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c src/wrapper/wrapper.cpp -o build/temp.macosx-10.14-x86_64-3.7/src/wrapper/wrapper.o -stdlib=libc++ -mmacosx-version-min=10.7 -DVERSION_INFO="2019.1" -std=c++14 -fvisibility=hidden
clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -fwrapv -Wall -O3 -DNDEBUG -DHAVE_MREMAP=0 -Isrc/metis/GKlib -Isrc/metis/include -Isrc/metis/libmetis -I/Users/matt/env3.7-2/include/site/python3.7 -I/Users/matt/env3.7-2/include/site/python3.7 -I/Users/matt/env3.7-2/include -I/usr/local/Cellar/python/3.7.2_2/Frameworks/Python.framework/Versions/3.7/include/python3.7m -c src/metis/GKlib/htable.c -o build/temp.macosx-10.14-x86_64-3.7/src/metis/GKlib/htable.o -stdlib=libc++ -mmacosx-version-min=10.7 -DVERSION_INFO="2019.1" -std=c++14 -fvisibility=hidden
error: invalid argument '-std=c++14' not allowed with 'C'
error: command 'clang' failed with exit status 1