[R-SIG-Mac] .C interface to R: problem with compilation

[iit512]

Dear all,

I am trying to reproduce the simple example from Peng & Leeuw article (http://www.biostat.jhsph.edu/~rpeng/docs/interface.pdf) but have multiple errors which I cannot resolve.

The example file is hello.c:

===
#include <R.h>
void hello(int *n)
{
        int i;
        for(i=0; i < *n; i++) {
                Rprintf("Hello, world!\n");
        }
}
===

I try to compile it via
> R CMD SHLIB hello.c
and get this message:

===
gcc-4.0 -arch ppc -isysroot /Developer/SDKs/MacOSX10.4u.sdk -std=gnu99 -no-cpp-precomp -I/Library/Frameworks/R.framework/Resources/include -I/Library/Frameworks/R.framework/Resources/include/ppc  -I/usr/local/include    -fPIC  -g -O2 -c hello.c -o hello.o
In file included from hello.c:1:
/Library/Frameworks/R.framework/Resources/include/R.h:31:20: error: stddef.h: No such file or directory
... (lot more errors)
===

I thought that the error is in "-I/usr/local/include" because I have stddef.h in /usr/include. So I tried following:

===
> MAKEFLAGS="CPPFLAGS=-I/usr/include" R CMD SHLIB hello.c

gcc-4.0 -arch ppc -isysroot /Developer/SDKs/MacOSX10.4u.sdk -std=gnu99 -no-cpp-precomp -I/Library/Frameworks/R.framework/Resources/include -I/Library/Frameworks/R.framework/Resources/include/ppc  -I/usr/include    -fPIC  -g -O2 -c hello.c -o hello.o
In file included from /Library/Frameworks/R.framework/Resources/include/R.h:35,
                 from hello.c:1:
/usr/include/float.h:8:24: error: no include path in which to search for float.h
... (and lot more errors)
===

System: R 2.5.1 /  Darwin Kernel Version 8.10.0 : Wed May 23 16:50:59 PDT 2007; root:xnu-792.21.3~1/RELEASE_PPC Power Macintosh powerpc / Mac OS X 10.4.10 (8R218) / PowerPC G4  (2.1)

How to resolve the problem? Any help will be appreciated.

With best wishes,

Alexey Shipunov