如何用homebrew和gcc-4.9构建openmpi？ [英] How to build openmpi with homebrew and gcc-4.9?

问题描述

默认情况下 brew install openmpi 使用 clang 来创建它的包装器。

我需要为包装指定 gcc-4.9 （安装Homebrew）。

I已尝试

  $ export CC = gcc-4.9 
 $ brew install openmpi 
 
 $ brew install --cc = gcc-4.9 openmpi 
 
 $ brew install --with-gcc49 openmpi 
 
 $ brew install -CC = gcc-4.9 -CXX = g ++  -  4.9 -FC = gfortran -F77 = gfortran openmpi 
 
 $ brew install openmpi --cc = gcc-4.9 
 
 $ brew install openmpi --CC = gcc-4.9 --CXX = g ++  -  4.9 --FC = gfortran --F77 = gfortran 
  

最后，我修改了 openmpi 公式添加：

  args =％W [
 CC = gcc-4.9 
 CXX = g ++  -  4.9 
 FC = gfortran 
 F77 = gfortran 
  

我仍然可以获得

$ $ p $ $ $ $ c $ $ $ $ $ $
$ / $ / $ / /Cellar/open-mpi/1.8.4/include -L / usr / local / opt / libevent / lib - L / usr / local / Cellar / open-mpi / 1.8.4 / lib -lmpi

解决方案

最后解决问题如下：

1）为自制程序添加环境变量（您也可以将这些行添加到〜\.bashrc ）：

  export HOMEBREW_CC = gcc-4.9 
 export HOMEBREW_CXX = g ++  -  4.9 
  

2）重建并重新安装 openmpi 及其从源代码的依赖关系

  brew重新安装openmpi --build-from-source 
  

3）最后，您将收到如下消息：

  ==>重新安装open-mpi 
 ==>使用自制软件提供的fortran编译器。 
这可以通过设置FC环境变量来更改。 
 ==>下载http://www.open-mpi.org/software/ompi/v1.8/downloads/openmpi-1.8。 
已经下载：/Library/Caches/Homebrew/open-mpi-1.8.4.tar.bz2 
 ==> ./configure --prefix = / usr / local / Cellar / open-mpi / 1.8.4 --disable-silent-rules 
 ==>使所有
 ==>> make check 
 ==> make install 
警告：open-mpi依赖项gcc使用不同的C ++标准
库（来自clang的libstdc ++）构建。这可能会在运行时造成问题。 
By default brew install openmpi uses clang to create its wrapper.

I need to specify gcc-4.9(Homebrew installed) for the wrapper.

I have tried
$export CC=gcc-4.9
$brew install openmpi

$brew install --cc=gcc-4.9 openmpi

$brew install --with-gcc49 openmpi

$brew install -CC=gcc-4.9 -CXX=g++-4.9 -FC=gfortran -F77=gfortran openmpi

$brew install openmpi --cc=gcc-4.9 

$brew install openmpi --CC=gcc-4.9 --CXX=g++-4.9 --FC=gfortran --F77=gfortran
Finally, I've modified the openmpi formula adding: 
 args = %W[
  CC=gcc-4.9 
  CXX=g++-4.9 
  FC=gfortran 
  F77=gfortran
I still get 
$mpicc --showme
clang -I/usr/local/Cellar/open-mpi/1.8.4/include -L/usr/local/opt/libevent/lib -L/usr/local/Cellar/open-mpi/1.8.4/lib -lmpi

解决方案
Finally it was solved as follows:

1) Add environment variables for homebrew (you can also add these lines to your ~\.bashrc):
export HOMEBREW_CC=gcc-4.9
export HOMEBREW_CXX=g++-4.9
2) Rebuild and reinstall openmpi and its dependencies from source 
brew reinstall openmpi --build-from-source
3) In the end you will get a message like:
==> Reinstalling open-mpi
==> Using Homebrew-provided fortran compiler.
This may be changed by setting the FC environment variable.
==> Downloading http://www.open-mpi.org/software/ompi/v1.8/downloads/openmpi-1.8.
Already downloaded: /Library/Caches/Homebrew/open-mpi-1.8.4.tar.bz2
==> ./configure --prefix=/usr/local/Cellar/open-mpi/1.8.4 --disable-silent-rules 
==> make all
==> make check
==> make install
Warning: open-mpi dependency gcc was built with a different C++ standard
library (libstdc++ from clang). This may cause problems at runtime.

                        
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