Re: Building current...

[Johnny Billquist <bqt%update.uu.se@localhost>]

On 2015-12-02 03:05, Christos Zoulas wrote:
> In article <3F70DD86-0204-466E-8082-CBAD923F8B84%comcast.net@localhost>,
> Paul Koning  <paulkoning%comcast.net@localhost> wrote:
> > > On Dec 1, 2015, at 6:29 PM, Johnny Billquist <bqt%softjar.se@localhost> wrote:
> > >
> > > After some hiatus, "my" VAX 8650 is back among the living, so I
> > decided to try and build current again.
> > > ...
> > > Now the "analysis". It appears that programs call log10() with an
> > argument of 0, and consider this to be normal.
> > > Unfortunately, this is one of those places where the VAX not doing
> > IEEE FP bites us. The IEEE log10() of 0 will return -inf, and happily
> > chug on. The VAX log10() of 0 will cause an illegal instruction trap.
> > > I suspect the other programs crashing might be because of the same
> > reason. The question is - what should we do? I'm tempted to just change
> > the code for log() to return 0, or possible -MAX_whatever and not trap.
> > Opinions?
> >
> > Why not simply fix the bug?  log(0) is invalid.  It's probably an
> > initialization error, where log() is used for some magic timekeeping
> > math that is only valid the second time around.
>
> I fixed it.

Care to share some details of how you fixed it?

	Johnny

--
Johnny Billquist                  || "I'm on a bus
                                  ||  on a psychedelic trip
email: bqt%softjar.se@localhost             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol