Re: [PATCH] MIPS: Enable NewABI testing for all Linux targets

[Richard Sandiford <rdsandiford at googlemail dot com>]

"Maciej W. Rozycki" <macro@codesourcery.com> writes:
> On Sat, 4 Aug 2012, Richard Sandiford wrote:
>> >  Can you comment on my concerns about config.bfd too?
>> 
>> Not including the targets in the BFD64 block at the time that the
>> extra vectors were added was probably an oversight.
>
>  I've been wondering if these extra vectors were added by mistake instead, 
> like slipped through in a larger commit unnoticed.  I'll post a fix to the 
> BFD64 block separately.

The 64-bit ones?  No, Debian wanted to allow 32-bit *-linux-gnu targets
that provice all three ABIs, while still defaulting to o32.  The associated
GCC configure option is --enable-targets=all.  (Confusingly different from
the binutils meaning, but there you go.  That choice of name wasn't a MIPS
invention.)

>> Providing a separate configuration that isn't BFD64 and doesn't have the
>> extra vectors seems more trouble than it's worth TBH.  If you disagree
>> though, please go ahead.
>
>  My understanding is it only really matters for hosts that do not have a 
> 64-bit integer type and therefore cannot handle 64-bit quantities.  In 
> which case I couldn't care less, GCC has supported 64-bit long long on 
> 32-bit hosts since time immemorial and the last teething problems in this 
> area I seem to remember went away in late 1990s.

Indeed.  And MIPS GCC requires 64-bit HWIs regardless of whether you're
compiling for a 32-bit or 64-bit target.

Richard