No luck

[joel at OARcorp.com (joel at OARcorp.com)]

On Wed, 12 May 1999, erik.ivanenko wrote:

> Rosimildo DaSilva wrote:
> 
> > No problem.
> >
> > I am glad you got everything figured out for your BSP.
> >
> > Now, that we have C++ exceptions and Global Ctor/Dtor
> > working for the intel i386 platform, we have to make sure
> > that all changes get incorporated to GCC and RTEMS.
> > I mean the changes to get just this working. Let's do this
> > first, and later worry about the CORBA stuff.
> >
> > My understanding is that you had to change a few things
> > for ELF to get Float-Point working.
> >
> > Rosimildo.
> 
>   OK.  I did have to modify a few things to get SFP going on ELF.  To get this
> into RTEMS, we'll need a lot of help ---
> 
> The original SFP patch modified t-i386bare, which is used to build i386-coff.
> 
> The EH patch created a new file, t-rtems-i386, which I had to modify to reflect
> the same alterations as t-i386bare along with two other files:
> 
> gcc/config/i386/i386.h : changed LONG_DOUBLE_TYPE_SIZE to 64
> gcc/real.h                        : changed LONG_DOUBLE_TYPE_SIZE to 64
> 
> These changes have to be put in place depending on the type of compiler the
> user wishes to build.
> 
> How do they get incorporated? i386.h and real.h are used elsewhere already, so
> this is a platform specific change.

My understanding is that platform specific overrides are handled like
this:

/* in an rtemsspecific file */

#include i386/i386.h

#undef LONG_DOUBLE_TYPE_SIZE
#define LONG_DOUBLE_TYPE_SIZE 64

Or something like that.

I would think it is better to have the --enable-soft-fp switch.  

Ian/Gumby .. opinions please.

--joel