Hello, I cannot install PO on my using either pip or setup. I got the following message, after entering: pip install POT  ERROR: Complete output from command /Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6 -u -c 'import setuptools, tokenize;__file__='"'"'/private/var/folders/73/xkvgyzh906nc52ydlh23cnvm0000gp/T/pip-install-nzpvw23r/POT/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /private/var/folders/73/xkvgyzh906nc52ydlh23cnvm0000gp/T/pip-record-o4wa2u7m/install-record.txt --single-version-externally-managed --compile:     ERROR: /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/distutils/dist.py:261: UserWarning: Unknown distribution option: 'long_description_content_type'       warnings.warn(msg)     running install     running build     running build_py     creating build     creating build/lib.macosx-10.6-intel-3.6     creating build/lib.macosx-10.6-intel-3.6/ot     copying ot/bregman.py -> build/lib.macosx-10.6-intel-3.6/ot     copying ot/plot.py -> build/lib.macosx-10.6-intel-3.6/ot     copying ot/stochastic.py -> build/lib.macosx-10.6-intel-3.6/ot     copying ot/datasets.py -> build/lib.macosx-10.6-intel-3.6/ot     copying ot/__init__.py -> build/lib.macosx-10.6-intel-3.6/ot     copying ot/dr.py -> build/lib.macosx-10.6-intel-3.6/ot     copying ot/utils.py -> build/lib.macosx-10.6-intel-3.6/ot     copying ot/smooth.py -> build/lib.macosx-10.6-intel-3.6/ot     copying ot/gromov.py -> build/lib.macosx-10.6-intel-3.6/ot     copying ot/optim.py -> build/lib.macosx-10.6-intel-3.6/ot     copying ot/da.py -> build/lib.macosx-10.6-intel-3.6/ot     creating build/lib.macosx-10.6-intel-3.6/ot/gpu     copying ot/gpu/bregman.py -> build/lib.macosx-10.6-intel-3.6/ot/gpu     copying ot/gpu/__init__.py -> build/lib.macosx-10.6-intel-3.6/ot/gpu     copying ot/gpu/utils.py -> build/lib.macosx-10.6-intel-3.6/ot/gpu     copying ot/gpu/da.py -> build/lib.macosx-10.6-intel-3.6/ot/gpu     creating build/lib.macosx-10.6-intel-3.6/ot/lp     copying ot/lp/__init__.py -> build/lib.macosx-10.6-intel-3.6/ot/lp     copying ot/lp/cvx.py -> build/lib.macosx-10.6-intel-3.6/ot/lp     creating build/lib.macosx-10.6-intel-3.6/ot/externals     copying ot/externals/funcsigs.py -> build/lib.macosx-10.6-intel-3.6/ot/externals     copying ot/externals/__init__.py -> build/lib.macosx-10.6-intel-3.6/ot/externals     running build_ext     building 'ot.lp.emd_wrap' extension     creating build/temp.macosx-10.6-intel-3.6     creating build/temp.macosx-10.6-intel-3.6/ot     creating build/temp.macosx-10.6-intel-3.6/ot/lp     /usr/bin/clang -fno-strict-aliasing -Wsign-compare -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -arch i386 -arch x86_64 -g -I//usr/local/Cellar/gcc/7.3.0/include/c++/7.3.0 -Iot/lp -I/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/numpy/core/include -I/private/var/folders/73/xkvgyzh906nc52ydlh23cnvm0000gp/T/pip-install-nzpvw23r/POT/ot/lp -I/Library/Frameworks/Python.framework/Versions/3.6/include/python3.6m -c ot/lp/emd_wrap.cpp -o build/temp.macosx-10.6-intel-3.6/ot/lp/emd_wrap.o     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]     In file included from ot/lp/emd_wrap.cpp:28:     In file included from /Library/Frameworks/Python.framework/Versions/3.6/include/python3.6m/Python.h:34:     In file included from //usr/local/Cellar/gcc/7.3.0/include/c++/7.3.0/stdlib.h:36:     In file included from //usr/local/Cellar/gcc/7.3.0/include/c++/7.3.0/cstdlib:77: //usr/local/Cellar/gcc/7.3.0/include/c++/7.3.0/bits/std_abs.h:102:7: error: __float128 is not supported on this target       abs(__float128 __x)           ^ //usr/local/Cellar/gcc/7.3.0/include/c++/7.3.0/bits/std_abs.h:101:3: error: __float128 is not supported on this target       __float128       ^     In file included from ot/lp/emd_wrap.cpp:636:     In file included from /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/numpy/core/include/numpy/arrayobject.h:4:     In file included from /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/numpy/core/include/numpy/ndarrayobject.h:12:     In file included from /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/numpy/core/include/numpy/ndarraytypes.h:1822: /Library/Frameworks/Python.framework/Versions/3.6/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 " \      ^     In file included from ot/lp/emd_wrap.cpp:638:     In file included from ot/lp/EMD.h:21:     ot/lp/network_simplex_simple.h:1421:20: warning: unused variable 'prevCost' [-Wunused-variable]                 double prevCost=-1;                        ^     3 warnings and 2 errors generated.     error: command '/usr/bin/clang' failed with exit status 1     ---------------------------------------- ERROR: Command "/Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6 -u -c 'import setuptools, tokenize;__file__='"'"'/private/var/folders/73/xkvgyzh906nc52ydlh23cnvm0000gp/T/pip-install-nzpvw23r/POT/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /private/var/folders/73/xkvgyzh906nc52ydlh23cnvm0000gp/T/pip-record-o4wa2u7m/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /private/var/folders/73/xkvgyzh906nc52ydlh23cnvm0000gp/T/pip-install-nzpvw23r/POT/ It occured after I add the path for iostream, which was getting me an error message, using export CPPFLAGS=-I//usr/local/Cellar/gcc/7.3.0/include/c++/7.3.0 I also tried to use python setup install, but the same occurs. I am working on a mac notebook pro with High Sierra OS. Does someone have any idea to help? Thanks! odv -- Olivier de viron Directeur de l'umr lienss DEPARTEMENT SCIENCES DE LA TERRE 05 46 50 76 34 olivier.de_viron@univ-lr.fr <mailto:olivier.de_viron@univ-lr.fr> LIttoral ENvironnement et Sociétés (LIENSs) *Université de La Rochelle* Bâtiment ILE 2, rue Olympe de Gouges 17000 La Rochelle lienss.univ-larochelle.fr <http://lienss.univ-larochelle.fr> www.univ-larochelle.fr <https://www.univ-larochelle.fr> Suivez-nous : Facebook <https://www.facebook.com/Universite.de.La.Rochelle> | Twitter <https://twitter.com/UnivLaRochelle>