robustbase compilation problem: probably boneheaded? maybe 32-bit?

With a recent SVN build (R Under development (unstable) (2013-07-10
r63264) -- "Unsuffered Consequences"), I'm having trouble installing the
robustbase package.  The bottom line is that I *think* it's a
32-bit-system problem, but I could easily be mistaken.

It's a bug in robustbase - it redefines R_xlen_t without checking the R version. I think the author's true intention was to make it conditional on R version for compatibility so it should be using R_VERSION and not LONG_VECTOR_SUPPORT since the latter is irrelevant here as R 3.0.0+ will have R_xlen_t regardless of the long vector support.

Cheers,
Simon
robustbase is passing its package checks:
http://cran.r-project.org/web/checks/check_results_robustbase.html

... but from the names of the targets it doesn't look like it is tested
on 32-bit platforms?

 The error is:

gcc -std=gnu99 -I/usr/local/lib/R/include -DNDEBUG  -I/usr/local/include
  -fpic  -g -O2  -c init.c -o init.o
In file included from init.c:3:
robustbase.h:20: error: redefinition of typedef ?R_xlen_t?
/usr/local/lib/R/include/Rinternals.h:69: note: previous declaration of
?R_xlen_t? was here

 As far as I can see there isn't any junk left over in my systems from
previous installs.

Rinternals.h has

#ifdef LONG_VECTOR_SUPPORT
   typedef ptrdiff_t R_xlen_t;
   typedef struct { R_xlen_t lv_length, lv_truelength; } R_long_vec_hdr_t;
# define R_XLEN_T_MAX 4503599627370496
# define R_SHORT_LEN_MAX 2147483647
# define R_LONG_VEC_TOKEN -1
#else
   typedef int R_xlen_t;
# define R_XLEN_T_MAX R_LEN_T_MAX
#endif

while robustbase has

#ifndef LONG_VECTOR_SUPPORT
# ifndef XLENGTH
  // for  R <= 2.15.x :
#  define XLENGTH(x) LENGTH(x)
  typedef int R_xlen_t;
# endif
#endif

It seems the problem is that I have

#define SIZEOF_SIZE_T 4

in my config.log , which in turn turns off LONG_VECTOR_SUPPORT, which is
otherwise (?) assumed only to be true for R<=2.15.x ... can this be
because I'm on 32-bit Linux , or on old linux with gcc 4.4.3, or ... ?
<http://stackoverflow.com/questions/918787/whats-sizeofsize-t-on-32-bit-vs-the-various-64-bit-data-models>

 Can anyone confirm/enlighten me?

 cheers
   Ben Bolker

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robustbase compilation problem: probably boneheaded? maybe 32-bit?

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