Re: Test results for m4-1.4.9b

[Gary V. Vaughan]

Hi Bruno,

On 16 Jun 2007, at 18:53, Bruno Haible wrote:
> Gary V. Vaughan wrote on 2007-06-05:
> > (This is using test-frexpl.c from gnulib HEAD after your patch  
> > commit)
> >
> >      1.01L = 0X2.051EB851EB851EB851EB851EB8P-1
> >     0.505L = 0X2.051EB851EB851EB851EB851EB8P-2
> >
> >   mantissa = 0X2.051EB851EB851EB851EB851EB8P-2
> >          x = 0X2.051EB851EB851EB851EB851EB8P-1
> >   mantissa == 0.505L? no
> >   test-frexpl.c:171: assertion failed
> >   FAIL: test-frexpl
> >
> > Hrmm, the bit patterns look identical to me.  I'm lost!
>
> Hmm, I tried looking at it from an even lower level. First, I  
> isolated this
> test case, which fails on MacOS X 10.4 but works on Linux/x86:
>
> [[excellent explanation snipped]]
>
> I'm applying this workaround.
>
> 2007-06-16  Bruno Haible  <address@hidden>
>
>         * m4/frexpl.m4 (gl_FUNC_FREXPL_WORKS): Catch the MacOS X 10.4 bug.
>         * doc/functions/frexpl.texi: Document the MacOS X 10.4 bug.
>         Reported by Gary V. Vaughan <address@hidden>.

Wow, excellent catch!!  Thank you.

Don't forget to note here that this failure was for Mac OS X/ppc only  
(my
intel machine doesn't exhibit the error at all).  Unfortunately, I  
moved to
Florida last week, and my ppc iMac is in storage so I can't test it  
myself.

Cheers,
        Gary
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