Still can't install scipy due to missing fortran compiler after brew install gcc on Mac OS X

Question

I have read and followed this answer to install scipy/numpy/theano. However, it still failed on the same error of missing Fortran compiler after brew install gcc. While Home

Answer 1

Fixed by upgrading pip, even though I just installed my pip/virtualenv the first time anew on the same day.

(mypy)MAC0227: $ pip install --upgrade pip
...
(mypy)MAC0227: $ pip install theano
/Users/me/.virtualenvs/mypy/lib/python2.7/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:79: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
  InsecurePlatformWarning
Requirement already satisfied (use --upgrade to upgrade): theano in /Users/me/.virtualenvs/mypy/lib/python2.7/site-packages
Requirement already satisfied (use --upgrade to upgrade): numpy>=1.6.2 in /Users/me/.virtualenvs/mypy/lib/python2.7/site-packages (from theano)
Collecting scipy>=0.11 (from theano)
/Users/me/.virtualenvs/mypy/lib/python2.7/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:79: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
  InsecurePlatformWarning
  Downloading scipy-0.15.1-cp27-none-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl (19.8MB)
    100% |████████████████████████████████| 19.8MB 23kB/s
Installing collected packages: scipy
Successfully installed scipy-0.15.1

Answer 2

It's depends on gcc version. Check your gcc version:

Depends: gcc-4.8-base (= 4.8.2-19ubuntu1) but 4.8.4-2ubuntu1~14.04 is to be installed

Update your gcc version: http://ubuntuhandbook.org/index.php/2013/08/install-gcc-4-8-via-ppa-in-ubuntu-12-04-13-04/

Answer 3

For macOS, installed Fortran and it worked.

$ brew install gfortran

Answer 4

For Arch Linux, you'll need to install core/gcc-fortran, although I realized that I could just change the version of scipy in my requirements.txt file to the newest version available to fix the issue, too.

Answer 5

The following worked for me:

sudo apt-get install gfortran

on my system:

Ubuntu 15.10 (Linux 4.2.0-19-generic #23-Ubuntu x86_64 x86_64 x86_64 GNU/Linux)