Fail to pip install python-snappy on virtualenv

Bắt đầu bằng cách tái hiện lỗi virtualenv với lệnh được báo cáo pip install python-snappy và so sánh với lần cài đặt thành công bằng Python hệ thống. Kiểm tra setup.py, snappymodule.cc và crc32c.c cùng với đầu ra của trình biên dịch, đặc biệt là các thông báo về kiến trúc i386 và x86_64. Công việc được xem là hoàn tất khi cài đặt thành công trong virtualenv được báo cáo.

Hello,

I fail to run pip install python-snappy on my virtualenv with Python 3.4.4

I built snappy with brew install snappy and also when I do pip3 install python-snappy with my standard python 3.4.4 version (no venv activated) everything works fine.

My error is

(paul) ➜  python git:(master) ✗ CPPFLAGS="-I/usr/local/include -L/usr/local/lib" pip install python-snappy

Collecting python-snappy
  Using cached python-snappy-0.5.1.tar.gz
Building wheels for collected packages: python-snappy
  Running setup.py bdist_wheel for python-snappy ... error
  Complete output from command /Users/labs/venvs/paul/bin/python3 -u -c "import setuptools, tokenize;__file__='/private/var/folders/pf/l5_q3mn94jb9wddqtv5h23th0000gn/T/pip-build-rcpw6591/python-snappy/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 /var/folders/pf/l5_q3mn94jb9wddqtv5h23th0000gn/T/tmps8cfe0d6pip-wheel- --python-tag cp34:
  WARNING: '.' not a valid package name; please use only .-separated package names in setup.py
  running bdist_wheel
  running build
  running build_py
  package init file '__init__.py' not found (or not a regular file)
  creating build
  creating build/lib.macosx-10.6-intel-3.4
  copying setup.py -> build/lib.macosx-10.6-intel-3.4
  copying snappy.py -> build/lib.macosx-10.6-intel-3.4
  copying snappy_cffi.py -> build/lib.macosx-10.6-intel-3.4
  copying test_snappy.py -> build/lib.macosx-10.6-intel-3.4
  copying test_snappy_cffi.py -> build/lib.macosx-10.6-intel-3.4
  running build_ext
  building '_snappy' extension
  creating build/temp.macosx-10.6-intel-3.4
  /usr/local/bin/clang -fno-strict-aliasing -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -arch i386 -arch x86_64 -g -I/usr/local/include -L/usr/local/lib -I/Library/Frameworks/Python.framework/Versions/3.4/include/python3.4m -c snappymodule.cc -o build/temp.macosx-10.6-intel-3.4/snappymodule.o
  clang-5.0: warning: argument unused during compilation: '-L/usr/local/lib' [-Wunused-command-line-argument]
  /usr/local/bin/clang -fno-strict-aliasing -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -arch i386 -arch x86_64 -g -I/usr/local/include -L/usr/local/lib -I/Library/Frameworks/Python.framework/Versions/3.4/include/python3.4m -c crc32c.c -o build/temp.macosx-10.6-intel-3.4/crc32c.o
  clang-5.0: warning: argument unused during compilation: '-L/usr/local/lib' [-Wunused-command-line-argument]
  /usr/local/bin/clang++ -bundle -undefined dynamic_lookup -arch i386 -arch x86_64 -g -I/usr/local/include -L/usr/local/lib build/temp.macosx-10.6-intel-3.4/snappymodule.o build/temp.macosx-10.6-intel-3.4/crc32c.o -lsnappy -o build/lib.macosx-10.6-intel-3.4/_snappy.so
  ld: warning: ignoring file /usr/local/lib/libsnappy.dylib, file was built for x86_64 which is not the architecture being linked (i386): /usr/local/lib/libsnappy.dylib
  ld: in '/usr/local/lib/libunwind.dylib', file was built for x86_64 which is not the architecture being linked (i386): /usr/local/lib/libunwind.dylib for architecture i386
  clang-5.0: error: linker command failed with exit code 1 (use -v to see invocation)
  error: command '/usr/local/bin/clang++' failed with exit status 1

  ----------------------------------------
  Failed building wheel for python-snappy
  Running setup.py clean for python-snappy
Failed to build python-snappy
Installing collected packages: python-snappy
  Running setup.py install for python-snappy ... error
    Complete output from command /Users/labs/venvs/paul/bin/python3 -u -c "import setuptools, tokenize;__file__='/private/var/folders/pf/l5_q3mn94jb9wddqtv5h23th0000gn/T/pip-build-rcpw6591/python-snappy/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /var/folders/pf/l5_q3mn94jb9wddqtv5h23th0000gn/T/pip-nld38g3m-record/install-record.txt --single-version-externally-managed --compile --install-headers /Users/labs/venvs/paul/bin/../include/site/python3.4/python-snappy:
    WARNING: '.' not a valid package name; please use only .-separated package names in setup.py
    running install
    running build
    running build_py
    package init file '__init__.py' not found (or not a regular file)
    creating build
    creating build/lib.macosx-10.6-intel-3.4
    copying setup.py -> build/lib.macosx-10.6-intel-3.4
    copying snappy.py -> build/lib.macosx-10.6-intel-3.4
    copying snappy_cffi.py -> build/lib.macosx-10.6-intel-3.4
    copying test_snappy.py -> build/lib.macosx-10.6-intel-3.4
    copying test_snappy_cffi.py -> build/lib.macosx-10.6-intel-3.4
    running build_ext
    building '_snappy' extension
    creating build/temp.macosx-10.6-intel-3.4
    /usr/local/bin/clang -fno-strict-aliasing -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -arch i386 -arch x86_64 -g -I/usr/local/include -L/usr/local/lib -I/Library/Frameworks/Python.framework/Versions/3.4/include/python3.4m -c snappymodule.cc -o build/temp.macosx-10.6-intel-3.4/snappymodule.o
    clang-5.0: warning: argument unused during compilation: '-L/usr/local/lib' [-Wunused-command-line-argument]
    /usr/local/bin/clang -fno-strict-aliasing -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -arch i386 -arch x86_64 -g -I/usr/local/include -L/usr/local/lib -I/Library/Frameworks/Python.framework/Versions/3.4/include/python3.4m -c crc32c.c -o build/temp.macosx-10.6-intel-3.4/crc32c.o
    clang-5.0: warning: argument unused during compilation: '-L/usr/local/lib' [-Wunused-command-line-argument]
    /usr/local/bin/clang++ -bundle -undefined dynamic_lookup -arch i386 -arch x86_64 -g -I/usr/local/include -L/usr/local/lib build/temp.macosx-10.6-intel-3.4/snappymodule.o build/temp.macosx-10.6-intel-3.4/crc32c.o -lsnappy -o build/lib.macosx-10.6-intel-3.4/_snappy.so
    ld: warning: ignoring file /usr/local/lib/libsnappy.dylib, file was built for x86_64 which is not the architecture being linked (i386): /usr/local/lib/libsnappy.dylib
    ld: in '/usr/local/lib/libunwind.dylib', file was built for x86_64 which is not the architecture being linked (i386): /usr/local/lib/libunwind.dylib for architecture i386
    clang-5.0: error: linker command failed with exit code 1 (use -v to see invocation)
    error: command '/usr/local/bin/clang++' failed with exit status 1

    ----------------------------------------
Command "/Users/labs/venvs/paul/bin/python3 -u -c "import setuptools, tokenize;__file__='/private/var/folders/pf/l5_q3mn94jb9wddqtv5h23th0000gn/T/pip-build-rcpw6591/python-snappy/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /var/folders/pf/l5_q3mn94jb9wddqtv5h23th0000gn/T/pip-nld38g3m-record/install-record.txt --single-version-externally-managed --compile --install-headers /Users/labs/venvs/paul/bin/../include/site/python3.4/python-snappy" failed with error code 1 in /private/var/folders/pf/l5_q3mn94jb9wddqtv5h23th0000gn/T/pip-build-rcpw6591/python-snappy/ 

I think my libsnappy was built for 64 bit only and I'm trying to use it with a 32-bit program but this goes beyond my understanding.
I tried brew install snappy --universal as I read some similar issues for pip installing other programs but it failed again.

I googled it and there's nothing about such a case.

Many thanks for reading my issue.