FORTRAN for Snow Leopard?

[Marcelo Chiapparini]

Hi!

after installing gcc_select, and before installing any gcc form macports, I
ran it and got the following output:

$ gcc_select -l
Available versions:
gcc40 gcc42 llvm-gcc42

My guess is that gcc40 came installed with Snow Leopard by default, and
gcc42 was installed by the latest version of Xcode I installed to run
macports. Now I will install gcc45 or gcc46+gfrotan in order to run frotran.
My question is the following: each time I need to install a port from
macports, where Xcode is used, I should switch gcc to gcc42, the one
installed with Xcode?

thanks in advance

Marcelo




2011/1/7 Jason Swails <jason.swails at gmail.com>

> Hello,
>
> I use Fortran extensively on my Mac for my work (scientific computing --
> all applications are written in Fortran).  I have tried both of the methods
> that you have below, but I've had problems with all of them.  The problem
> with installing just gfortran through binaries is that they're typically
> incompatible with the Xcode GCC compiler (they're different versions of
> GCC), so it's far more difficult to link C- and Fortran- object files.  If
> you do find one that's compatible with the Xcode GCC, then that means you're
> using GCC 4.2, which is quite old. gfortran from that era is not yet stable
> and reliable, especially for legacy F77.
>
> IMO, the best approach is actually provided by MacPorts.  Just install an
> updated GCC with the +gfortran variant.
>
> sudo port -v install gcc45 +gfortran (this may take a little while)
>
> Then you can install gcc_select to help manage different versions of the
> GCC compiler (i.e. the xcode version and the MacPorts version, or multiple
> MacPorts versions if you install gcc44, gcc43, gcc46, etc.)
>
> sudo port -v install gcc_select (this should be fast)
>
> To use gcc_select, do the following
>
> gcc_select -l (lists all of the available versions)
> sudo gcc_select mp-gcc45 (selects the GCC 4.5 installed with MacPorts)
>
> Hope this helps,
> Jason
>
> On Fri, Jan 7, 2011 at 8:49 AM, Marcelo Chiapparini <
> marcelo.chiapparini at gmail.com> wrote:
>
>> Hi!
>>
>> I need to run FORTRAN in my iMac with OSX 10.6 installed. I've done some
>> research, but the results are not conclusive:
>>
>> http://www.webmo.net/support/fortran_osx.html
>> http://hpc.sourceforge.net/
>> http://gcc.gnu.org/wiki/GFortranBinaries
>> http://r.research.att.com/tools/
>>
>> I am not sure which method is the most convenient: to installing the
>> FORTRAN binaries for Leopard or to installing the gfortran extension for
>> Xcode... So, I would like very much to know about experiences from people
>> already running FORTRAN in a Mac (if any!). Thanks a lot in advance for the
>> help!
>>
>> Regards
>>
>> Marcelo
>>
>>
>>
>> _______________________________________________
>> macports-users mailing list
>> macports-users at lists.macosforge.org
>> http://lists.macosforge.org/mailman/listinfo.cgi/macports-users
>>
>>
>
>
> --
> Jason M. Swails
> Quantum Theory Project,
> University of Florida
> Ph.D. Graduate Student
> 352-392-4032
>



-- 
Marcelo Chiapparini
http://sites.google.com/site/marcelochiapparini
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