FORTRAN for Snow Leopard?

[Marcelo Chiapparini]

Thank you a lot once more for the advice!!!

Marcelo


2011/1/9 Jason Swails <jason.swails at gmail.com>

>
>
> On Sun, Jan 9, 2011 at 2:00 PM, Marcelo Chiapparini <
> marcelo.chiapparini at gmail.com> wrote:
>
>> 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?
>>
>
> The ports *should* automatically use /usr/bin/gcc-4.2 to avoid this issue
> altogether, and in my experience this is almost always the case.  The
> notable exception for me has been with git-core.  In my opinion, you should
> switch back to gcc42 if you can remember (all it does is shuffle around
> symlinks, so it's cheap and easy), but it'll probably be fine if you don't.
>
> One other comment -- if you're using gcc46 +gfortran, take care to spell
> gfortran correctly, since port will not complain about misspellings and
> silently ignore it.
>
> Good luck!
> Jason
>
>
>>
>> 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
>>
>> _______________________________________________
>> 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
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.macosforge.org/pipermail/macports-users/attachments/20110109/fc3f2dbb/attachment.html>