由于在 Mac OS X 上 brew install gcc 后缺少 fortran 编译器，仍然无法安装 scipy

Question

我已经阅读并遵循了 gcc 的 this answer to install scipy/numpy/theano. However, it still failed on the same error of missing Fortran compiler after brew install gcc. While HomeBrew installed the gcc-4.8, it didn't install any gfortran or g95 commands. I figure gfortran may be just a synonymy，然后我创建了一个符号链接

$ cd /usr/local/bin
$ ln -s gcc-4.8 gfortran
$ pip install scipy

然后它检测到 gfortran 命令，但仍然抱怨没有 Fortran 编译器

customize Gnu95FCompiler
Found executable /usr/local/bin/gfortran
customize NAGFCompiler
Could not locate executable f95
customize AbsoftFCompiler
Could not locate executable f90
Could not locate executable f77
customize IBMFCompiler
Could not locate executable xlf90
Could not locate executable xlf
customize IntelFCompiler
Could not locate executable ifort
Could not locate executable ifc
customize GnuFCompiler
Could not locate executable g77
customize G95FCompiler
Could not locate executable g95
customize PGroupFCompiler
Could not locate executable pgfortran
don't know how to compile Fortran code on platform 'posix'
building 'dfftpack' library
error: library dfftpack has Fortran sources but no Fortran compiler found

我还应该做什么？

Answer 1

已通过升级 pip 修复，即使我刚刚在同一天重新安装 pip/virtualenv。

(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

以下对我有用：

sudo apt-get install gfortran

在我的系统上：

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

Answer 3

这取决于 gcc 版本。检查你的 gcc 版本：

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

更新您的 gcc 版本： http://ubuntuhandbook.org/index.php/2013/08/install-gcc-4-8-via-ppa-in-ubuntu-12-04-13-04/

Answer 4

对于 Arch Linux，您需要安装 core/gcc-fortran，尽管我意识到我可以将 requirements.txt 文件中的 scipy 的版本更改为最新版本也可以解决这个问题。

Answer 5

对于 macOS，安装了 Fortran 并且可以正常工作。

$ brew install gfortran

Answer 6

我有同样的错误并使用命令：

brew install gfortran

日志显示 GCC 也已安装，最后，我可以安装 Scipy。

由于在 Mac OS X 上 brew install gcc 后缺少 fortran 编译器，仍然无法安装 scipy

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

python

macos

homebrew

fortran

numpy