[ale] g77 vs gfortran

[Courtney Thomas]

Dunno what you're doin' but you might wanna look at

	www.netlib.org/lapack95

HTH,
Courtney




Fulton Green wrote:
> As someone who honed his programming chops with a VAX/VMS Fortran 77
> compiler during college and in his first post-college workplace, I was
> intrigued ...
> 
> On Tue, Feb 21, 2006 at 12:45:46AM -0500, Dow_Hurst wrote:
> 
>>I've switched to opensuse 10.0 from novell on my laptop and noticed that g77 is now gfortran.
> 
> 
> Yep, GCC decided that it was about time to stop using a nearly thirty-
> year-old spec (Fortran 77) and start using ... a ten-year-old spec
> (Fortran 95).  Maybe OpenSUSE is just now updating their compilers to
> the 4.x level (some of the earliest 4.0 compilers had severe compilation
> and compatibility issues).
> 
> If it's not already obvious, gfortran is the GCC implementation of the
> Fortran 95 spec.  There's also a separate g95 project which has forked
> from GCC.
> 
> You can check out the goods here: http://gcc.gnu.org/wiki/GFortran
> 
> 
>>A particular fortran program I've used for several years now doesn't compile with gfortran.  Is the 
>>solution to download the g77 source and compile it?  I don't think there is a version of g77
>>precompiled for opensuse 10.0 is there?
> 
> 
> According to the aforementioned wiki:
> 
> http://gcc.gnu.org/wiki/GFortranG77
> 
> No one stepped up to port g77 to GCC 4.0's new front-end interface, so
> it no longer enjoys official support from the GCC development team.
> 
> Depending on what the portability goals of the owners/maintainers of this
> source code are, and the size of the codebase, you might want to pursue
> the conversion of this code to Fortran 95.  Could it really be all that
> complicated?  (Well, actually, it might be ...)
> 
> If that intrigues you and/or the original programmer, try Googling on
> "differences" "Fortran 77" "Fortran 95" to get some helpful aids toward
> that end.  You may also find it worthwhile to try out the g95 compiler.
> 
> If a precompiled version of g77 exists, it will be strictly from a third-
> party packager of (Open)SUSE modules.  It will most likely require the
> installation of the legacy GCC (3.95 or something to that effect).
> Hopefully, the package installation will be GCC 4.0-aware (i.e., it won't
> clobber the existing 4.0 installation or packages that it depends on).
> 
> HTH,
> Fulton
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