[PATCH committed] Fix build failure with MPFR 2.4.x (gimple-ssa-sprintf.c)

[Markus Trippelsdorf]

On 2017.01.27 at 08:41 +0100, Rainer Orth wrote:
> Hi Martin,
> 
> > On 01/24/2017 02:37 AM, Markus Trippelsdorf wrote:
> >> MPFR_RNDx was introduced in MPFR 3.0.0. Since the minimal version that
> >> gcc checks for is 2.4.0, this leads to a build failure.
> >>
> >> The fix is straightforward.
> >>
> >> Tested on x86_64-pc-linux-gnu. Committed to trunk as obvious.
> >>
> >> 	* gimple-ssa-sprintf.c (format_floating): Change MPFR_RNDx to
> >> 	GMP_RNDx for compatibility.
> >
> > This was changed once before for this reason (in r240350).  I forgot
> > all about it and put it back in my latest patch for some reason.  I
> > don't remember why exactly but I suspect I might have been trying to
> > overcome some MPFR oddity.  It might help to #undef the MPFR_RNDx
> > macros after including <mpfr.h> to avoid this in the future.  In any
> > event, thanks for the fix.
> 
> we certainly should do something like this: your latest patch introduced
> the same failure again:

Well, you cannot #undef enum members like MPFR_RNDU.

-- 
Markus