[R] make check failed on linux-amd64 using PGI compilers

[Peter Dalgaard]

"Liaw, Andy" <andy_liaw at merck.com> writes:

> Dear R-help,
> 
> I am trying to build R-2.2.0-patched (2005-11-07 r36217) on the head node of
> a Scyld cluster (dual Opteron 250s) using PGI compilers (v6.0).  I used the
> flags suggested by Jennifer Lai on R-devel (taken from R-admin, except that
> I had to add -L/usr/X11R6/lib64 to LDFLAGS).  The build went fine, but make
> check-all failed when running tests/Examples/graphics-Ex.R, at:
> 
> > plot(1:2, xaxs = "i") # 'inner-axis' w/o extra space
> > stopifnot(par("xaxp")[1:2] == 1:2 &&
> +           par("usr")[1:2] == 1:2)
> Error: par("xaxp")]1:2] == 1:2 && par("usr")[1:2] == 1:2 is not TRUE
> 
> The above looks a bit strange to me, as running the R built as above,
> par("xaxp")[1:2] - 1:2 gives
> 
> [1] -1.110223e-16 -2.220446e-16
> 
> Is my R build faulty?  I'd very much appreciate any advise.

Relative errors of 1 ULP would not ruin my sleep.  It's not obvious to
me which is the floating point operation responsible for the effect,
though, and it is a bit suspicious given that it should just be the
x-range of the data.

-- 
   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
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