Rconfig.h & unsupported architectures

Hi all,

Recently, when compiling R packages containing C code, I've started
getting the following error:

* installing to library ?/Users/hadley/R?
* installing *source* package ?appdirs? ...
** Creating default NAMESPACE file
** libs
*** arch - i386
gcc -arch i386 -std=gnu99
-I/Library/Frameworks/R.framework/Resources/include
-I/Library/Frameworks/R.framework/Resources/include/i386 -DNDEBUG
-I/usr/local/include    -fPIC  -g -O2  -c win-path.c -o win-path.o
In file included from /Library/Frameworks/R.framework/Resources/include/R.h:34,
                 from win-path.c:1:
/Library/Frameworks/R.framework/Resources/include/Rconfig.h:13:2:
error: #error "Unsupported architecture."
In file included from
/Library/Frameworks/R.framework/Resources/include/R_ext/RS.h:27,
                 from /Library/Frameworks/R.framework/Resources/include/R.h:44,
                 from win-path.c:1:
/Library/Frameworks/R.framework/Resources/include/Rconfig.h:13:2:
error: #error "Unsupported architecture."

I'm on

sessionInfo()

R version 2.15.1 (2012-06-22)
Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)

And in case it helps:

gcc --version
i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 (Based on Apple Inc.
build 5658) (LLVM build 2336.9.00)

Any ideas about what I might have done to break this?

Thanks!

Hadley

Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University
http://had.co.nz/