Re: Link issue and other issues...

[David Highley <dhighley at highley-recommended dot com>]

"Jerry DeLisle wrote:"
> 
> David Highley wrote:
> > Trying to use the g77 3.3.3 compiler in a Cygwin environment to build
> > some old Fortran code. Have a few issues. The biggest being entry point
> > names and where the underscore characters are added.
> > 
> > I have tried all combinations of -fno-underscoring and
> > -fleading-underscore to try and get the underscore moved to the front of
> > the name instead of being appended to the name. Need to build code that
> > will link using Windows compilers with C++ code.
> > 
> > Other issue was the keyword static which does not seem to be known by
> > the compiler. I'm using the following options:
> > -fvxt -ffixed-lin-length-none -fno-underscoring -fleading-underscore
> > -mno-cygwin
> > 
> > Last thing I ran into was the need to change:
> > IF(VARIAB) to IF(VARIAB .NE. 0)
> > 
> > Thanks
> > 
> Have you tried gfortran? g77 is not really supported any more.

I see no package for gfortran in the latest Cygwin updates.

> Also, can you submit a small example of code illustrating what you are trying to 
> do?  That way we have half a chance to help you.  (Which we do want to do)

Its not that complicated.
SUBROUTINE XYZ

Windows compiled C++ code generates a reference for:
_XYZ

Run nm -C on the Fortran library and you see:
T XYZ__

They will never link. Add option -fno-underscoring and nm -C now shows:
T XYZ

Add option -fleading-underscore and nm -C shows:
T XYZ

I would say the option for leading-underscore is not functioning or the
no-underscoring is preventing the other option. Given that I tried the
-fleading-underscore by its self I would say that it does not work.

> Jerry
> 


-- 

Regards,

David Highley
Highley Recommended, Inc.       Phone: (206) 669-0081
2927 SW 339th Street            WEB: http://www.highley-recommended.com
Federal Way, WA 98023-7732