Can't install plyvel on macOS

[guhur]

From PyPI or direct repo, I get the same issue when installing:

cython --version
Cython version 0.28.5
cython --cplus --fast-fail --annotate plyvel/_plyvel.pyx
python setup.py build_ext --inplace --force
running build_ext
building 'plyvel._plyvel' extension
creating build
creating build/temp.macosx-10.13-x86_64-3.6
creating build/temp.macosx-10.13-x86_64-3.6/plyvel
clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I/Users/pierre-louis/.pyenv/versions/3.6.5/include/python3.6m -c plyvel/_plyvel.cpp -o build/temp.macosx-10.13-x86_64-3.6/plyvel/_plyvel.o -Wall -g -mmacosx-version-min=10.7 -stdlib=libc++
plyvel/_plyvel.cpp:584:10: fatal error: 'ios' file not found
#include "ios"
^
1 error generated.
error: command 'clang' failed with exit status 1
make: *** [ext] Error 1

leveldb and xcode are already installed.

Thanks for your help :)

[wbolster]

somehow cython thinks you're on ios but you don't have its development headers... 😞

[geyang]

same issue here.

[milkyklim]

Since the issue is closed, can anyone comment on the solution? 😅

[muerl]

As far as I can tell the solution is CFLAGS='-stdlib=libc++' (Worked for me with 1.1.0 and OSx 10.14.6. I cribbed it from here: #66 (comment) The other two options in the list are addressed in #97.
The PR seems to have removed that flag but adds a different one from the issue thread.

Maybe @importjake could comment?

[schmty]

@episodeyang @muerl @milkyklim sorry for not reaching out sooner, I'll try to help as best I can. I think it would be helpful to open a new issue with a more specific breakdown of your problems trying to install so I can try to better help (as I currently cannot reproduce this issue). Just FYI I'll be fairly slow to respond for the next week or so as I'll be away on a trip but I'm hoping to help whenever I have the time 😄

[milkyklim]

Solution for me was running the installation with CC=clang CXX=clang++ flags.

[schmty]

@milkyklim that's great, but I need help and more info about how you got this error relating to ios headers. Your solution may very well be the correct solution but I want to be able to understand how to reproduce this bug myself so I can be certain that adding these other flags would help.

What version of OSX and python and plyvel were you trying to install and did you get the same error as the OP above (where somehow cython looks for ios headers)?

[milkyklim]

I was not trying to install plyvel directly but it was among the dependencies.

The issue is old enough that I don't really remember where it occurred. 🙈 But the error message looked the same as OP.

[schmty]

Fair enough, I'll just say then that for the short term adding those extra flags is probably the best bet, and if I see a new issue filed with someone experiencing this issue or one similar then either I or anyone else motivated could open a PR adding those flags

[muerl]

@importjake I am switch laptops this week, so if I run into the issue again I will log a new issue.