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

[Palmer Dabbelt]

On Sat, 23 Dec 2017 04:44:28 PST (-0800), joseph@codesourcery.com wrote:
> 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).

OK.  I think we might need to reorganize our directories a bit to do that, but 
I'll try and figure something sane out.

>> > > +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.

Thanks -- I noticed that when going through the commit history to see what 
other ports had done here.