[PATCH v2 01/15] RISC-V: Build Infastructure

[Joseph Myers]

On Fri, 22 Dec 2017, Palmer Dabbelt wrote:

> If I understand what's going on correctly here, we support exceptions in the
> soft float ABI when built with hardware floating point instructions, but
> otherwise we don't (we're always round nearest).  I believe that means we need
> to set "with_fp_cond=1" when building with hardware floating point (regardless
> of ABI), and "with_fp_cond=0" otherwise.
> 
> Does this look sane?

Yes, but it needs to go along with having a nofpu sysdeps directory or 
directories with an Implies file or files pointing to ieee754/soft-fp 
(make sure that the soft-float configurations do end up with 
ieee754/soft-fp before other ieee754 directories in their sysdeps 
directory ordering).

> > > +abi-ilp32-options     := -D__SIZEOF_INT__=4
> > 
> > abi-* options variables are no longer used with the current bits/syscall.h
> > generation mechanism, so you should remove all settings of such variables
> > from the patch.
> 
> OK, we'll remove them for the v3.

To be clear, abi-*-condition variables are still needed (used in 
generating gnu/lib-names.h, for example); it's just abi-*-options that are 
obsolete.

-- 
Joseph S. Myers
joseph@codesourcery.com