trying to install ATLAS

[Ryan Schmidt]

On Mar 15, 2018, at 07:18, pagani laurent via macports-users wrote:

> Hello,
> 
> Running Mac OS 10.12.6, I try to install ATLAS with macports but 1) it selects /usr/bin/clang as a C compiler (why not the /opt/local/bin/gcc one ?),

MacPorts intentionally builds ports with specific compilers. This reduces the likelihood that something will go wrong and that you will need to ask for support.

/opt/local/bin/gcc is for your own personal use outside of MacPorts--to compile your own software, for example. You can set it to point to any compiler you want, using `sudo port select gcc`. So MacPorts can't rely on that symlink pointing to any particular compiler. So MacPorts doesn't use it for compiling ports.

>  2) it selects gfortran7 which does not exist and 3) it hangs up on the building. After more than one hour, still there :

Atlas takes many hours to compile, even on fast Macs.