pip install fails w/ 3.5b2, os/x

[yarko]

Putting this here for further checking.

I have brew installed pythons (2.7.10 and 3.4.3), so for now, my 3.5b2 is installed from the mac package (this might cause issues with headers, I'd guess). osx 10.10.3; latest Xcode;

In any case, here's the setup, and results (so far):

• pyvenv a virtualenv
• python 3.5b2
• pip update all
• pip install Cython

and then, attempt:

• pip install watchdog

results in error for non-existing compilation flag (issues just a warning when installed on 3.4.3 python)

(vhov) Yarkos-MacBook-Pro:hovercraft yak007$ python --version
Python 3.5.0b2
(vhov) Yarkos-MacBook-Pro:hovercraft yak007$ which python
/Users/yak007/workspace/hovercraft/env/vhov/bin/python
(vhov) Yarkos-MacBook-Pro:hovercraft yak007$ pip list
Cython (0.22)
docutils (0.12)
pip (7.0.3)
setuptools (17.1.1)

and the key action:

(vhov) Yarkos-MacBook-Pro:hovercraft yak007$ pip install watchdog
Collecting watchdog
  Using cached watchdog-0.8.3.tar.gz
Collecting PyYAML>=3.10 (from watchdog)
  Using cached PyYAML-3.11.tar.gz
Collecting argh>=0.24.1 (from watchdog)
Collecting pathtools>=0.1.1 (from watchdog)
Installing collected packages: PyYAML, argh, pathtools, watchdog
  Running setup.py install for PyYAML
  Running setup.py install for watchdog
    Complete output from command /Users/yak007/workspace/hovercraft/env/vhov/bin/python3.5 -c "import setuptools, tokenize;__file__='/private/var/folders/z_/p0qs_dyn5w186pp5wym5c65c0000gp/T/pip-build-8i5b7kqd/watchdog/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /var/folders/z_/p0qs_dyn5w186pp5wym5c65c0000gp/T/pip-jkl462at-record/install-record.txt --single-version-externally-managed --compile --install-headers /Users/yak007/workspace/hovercraft/env/vhov/include/site/python3.5/watchdog:
    running install
    running build
    running build_py
    creating build
    creating build/lib.macosx-10.6-intel-3.5
    creating build/lib.macosx-10.6-intel-3.5/watchdog
    copying src/watchdog/__init__.py -> build/lib.macosx-10.6-intel-3.5/watchdog
    copying src/watchdog/events.py -> build/lib.macosx-10.6-intel-3.5/watchdog
    copying src/watchdog/version.py -> build/lib.macosx-10.6-intel-3.5/watchdog
    copying src/watchdog/watchmedo.py -> build/lib.macosx-10.6-intel-3.5/watchdog
    creating build/lib.macosx-10.6-intel-3.5/watchdog/observers
    copying src/watchdog/observers/__init__.py -> build/lib.macosx-10.6-intel-3.5/watchdog/observers
    copying src/watchdog/observers/api.py -> build/lib.macosx-10.6-intel-3.5/watchdog/observers
    copying src/watchdog/observers/fsevents.py -> build/lib.macosx-10.6-intel-3.5/watchdog/observers
    copying src/watchdog/observers/fsevents2.py -> build/lib.macosx-10.6-intel-3.5/watchdog/observers
    copying src/watchdog/observers/inotify.py -> build/lib.macosx-10.6-intel-3.5/watchdog/observers
    copying src/watchdog/observers/inotify_buffer.py -> build/lib.macosx-10.6-intel-3.5/watchdog/observers
    copying src/watchdog/observers/inotify_c.py -> build/lib.macosx-10.6-intel-3.5/watchdog/observers
    copying src/watchdog/observers/kqueue.py -> build/lib.macosx-10.6-intel-3.5/watchdog/observers
    copying src/watchdog/observers/polling.py -> build/lib.macosx-10.6-intel-3.5/watchdog/observers
    copying src/watchdog/observers/read_directory_changes.py -> build/lib.macosx-10.6-intel-3.5/watchdog/observers
    copying src/watchdog/observers/winapi.py -> build/lib.macosx-10.6-intel-3.5/watchdog/observers
    creating build/lib.macosx-10.6-intel-3.5/watchdog/tricks
    copying src/watchdog/tricks/__init__.py -> build/lib.macosx-10.6-intel-3.5/watchdog/tricks
    creating build/lib.macosx-10.6-intel-3.5/watchdog/utils
    copying src/watchdog/utils/__init__.py -> build/lib.macosx-10.6-intel-3.5/watchdog/utils
    copying src/watchdog/utils/bricks.py -> build/lib.macosx-10.6-intel-3.5/watchdog/utils
    copying src/watchdog/utils/compat.py -> build/lib.macosx-10.6-intel-3.5/watchdog/utils
    copying src/watchdog/utils/decorators.py -> build/lib.macosx-10.6-intel-3.5/watchdog/utils
    copying src/watchdog/utils/delayed_queue.py -> build/lib.macosx-10.6-intel-3.5/watchdog/utils
    copying src/watchdog/utils/dirsnapshot.py -> build/lib.macosx-10.6-intel-3.5/watchdog/utils
    copying src/watchdog/utils/echo.py -> build/lib.macosx-10.6-intel-3.5/watchdog/utils
    copying src/watchdog/utils/event_backport.py -> build/lib.macosx-10.6-intel-3.5/watchdog/utils
    copying src/watchdog/utils/importlib2.py -> build/lib.macosx-10.6-intel-3.5/watchdog/utils
    copying src/watchdog/utils/platform.py -> build/lib.macosx-10.6-intel-3.5/watchdog/utils
    copying src/watchdog/utils/unicode_paths.py -> build/lib.macosx-10.6-intel-3.5/watchdog/utils
    copying src/watchdog/utils/win32stat.py -> build/lib.macosx-10.6-intel-3.5/watchdog/utils
    running egg_info
    writing requirements to src/watchdog.egg-info/requires.txt
    writing dependency_links to src/watchdog.egg-info/dependency_links.txt
    writing top-level names to src/watchdog.egg-info/top_level.txt
    writing src/watchdog.egg-info/PKG-INFO
    writing entry points to src/watchdog.egg-info/entry_points.txt
    warning: manifest_maker: standard file '-c' not found

    reading manifest file 'src/watchdog.egg-info/SOURCES.txt'
    reading manifest template 'MANIFEST.in'
    warning: no files found matching '*.h' under directory 'src'
    writing manifest file 'src/watchdog.egg-info/SOURCES.txt'
    running build_ext
    building '_watchdog_fsevents' extension
    creating build/temp.macosx-10.6-intel-3.5
    creating build/temp.macosx-10.6-intel-3.5/src
    gcc-4.2 -fno-strict-aliasing -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -arch i386 -arch x86_64 -g -DWATCHDOG_VERSION_STRING="0.8.3" -DWATCHDOG_VERSION_MAJOR=0 -DWATCHDOG_VERSION_MINOR=8 -DWATCHDOG_VERSION_BUILD=3 -I/Users/yak007/workspace/hovercraft/env/vhov/include -I/Library/Frameworks/Python.framework/Versions/3.5/include/python3.5m -c src/watchdog_fsevents.c -o build/temp.macosx-10.6-intel-3.5/src/watchdog_fsevents.o -std=c99 -pedantic -Wall -Wextra -fPIC -Wno-error=unused-command-line-argument-hard-error-in-future
    cc1: error: -Werror=unused-command-line-argument-hard-error-in-future: No option -Wunused-command-line-argument-hard-error-in-future
    cc1: error: -Werror=unused-command-line-argument-hard-error-in-future: No option -Wunused-command-line-argument-hard-error-in-future
    fatal error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/lipo: can't figure out the architecture type of: /var/folders/z_/p0qs_dyn5w186pp5wym5c65c0000gp/T//ccZjgonH.out
    error: command 'gcc-4.2' failed with exit status 1

    ----------------------------------------
Command "/Users/yak007/workspace/hovercraft/env/vhov/bin/python3.5 -c "import setuptools, tokenize;__file__='/private/var/folders/z_/p0qs_dyn5w186pp5wym5c65c0000gp/T/pip-build-8i5b7kqd/watchdog/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /var/folders/z_/p0qs_dyn5w186pp5wym5c65c0000gp/T/pip-jkl462at-record/install-record.txt --single-version-externally-managed --compile --install-headers /Users/yak007/workspace/hovercraft/env/vhov/include/site/python3.5/watchdog" failed with error code 1 in /private/var/folders/z_/p0qs_dyn5w186pp5wym5c65c0000gp/T/pip-build-8i5b7kqd/watchdog

[yarko]

I've since removed the package install Python 3.5b2, and brew install python3 --devel (to brew install python3.5b2), created a fresh virtualenv with pyvenv-3.5, confirmed the python version, etc.

Same failure - so this does not appear to be about the mixture of python installation methods.

Instead, it appears to be because of an old brew info apple-gcc42 package. Once I brew unlink apple-gcc42, installation works. Hopefully, this will help someone else.

(vhov) Yarkos-MacBook-Pro:hovercraft yak007$ ls -l $(which gcc-4.2)
lrwxr-xr-x  1 yak007  staff  46 Jun 20  2013 /usr/local/bin/gcc-4.2 -> ../Cellar/apple-gcc42/4.2.1-5666.3/bin/gcc-4.2

[Nikolaissue]

Hi - I'm getting this same problem, installing on Mac OSX 10.6 (see getnikola/nikola#2148 for the original issue). I installed python 3.5 from python.org. The command
brew unlink apple-gcc42
simply gives
Error: No such keg: /usr/local/Cellar/apple-gcc42

Any other suggestions?
Thank you!
Gerry.

[nardeas]

I ran into this issue while trying to do a simple pip install watchdog in a virtualenv with Python 3.6.5 on my mac.

Turns out in setup.py line 34 where the platform is detected as OSX it's adding this compile arg -Wno-error=unused-command-line-argument-hard-error-in-future which is not supported by the gcc shipped as default with older Xcode installs.

Since I am using homebrew gcc (gcc version 8.1.0 (Homebrew GCC 8.1.0)) instead of Xcode, to fix this I had to skip that check on L34 by changing the string macosx to something else like macosy and then run python3 setup.py install which resulted in successful installation.