location of Rconfig.h when using architecture-dependent subdirs

On Wed, 29 Sep 2010, Konis Kjell wrote:

Hello,

I just tried configuring R to use architecture-dependent subdirs

 $ r_arch=x86_64 ./configure --prefix=/u/smat/konis/testdir


on a Debain Squeeze box

 $ uname -a
 Linux smapc007 2.6.32-5-686 #1 SMP Sat Sep 18 02:14:45 UTC 2010 i686
GNU/Linux


After building and installing, the Rconfig.h ended up in
.../lib/R/include/x86_64 but R.h still includes it as

 #include <Rconfig.h>

That should be OK, though.  etc/Makeconf will include

R_XTRA_CPPFLAGS =  -I$(R_INCLUDE_DIR) -I$(R_INCLUDE_DIR)/x86_64

so Rconfig.h will be found when packages are installed.

I noticed that the CRAN binary for Mac OS X has the following
.../lib/R/include/Rconfig.h. What step am I missing that causes this
file
to be generated?

I suspect it is a back-compatibility fix for packages with Makefiles
that don't use R_XTRA_CPPFLAGS.

I don't have that file on my Mac build (nor my R 2.12.0 Windows
builds, both of which use subarchitectures) and I've never seen an
issue.

Thanks,
Kjell


/* This is an automatically generated universal stub for
architecture-dependent headers. */
#ifdef __i386__
#include "i386/Rconfig.h"
#elif defined __ppc__
#include "ppc/Rconfig.h"
#elif defined __ppc64__
#include "ppc64/Rconfig.h"
#elif defined __x86_64__
#include "x86_64/Rconfig.h"
#elif defined __arm__
#include "arm/Rconfig.h"
#else
#error "Unsupported architecture."
#endif

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595