[Rd] Ralloc clash

Tom McCallum tom.mccallum at levelelimited.com
Thu Nov 23 12:52:46 CET 2006

But from R_ext/RS.h  you have (my comments are given by <-- some text):

#ifndef STRICT_R_HEADERS  							<-- fair enough this is defined but it  
ends ...

#define R_PROBLEM_BUFSIZE       4096
/* Parentheses added for FC4 with gcc4 and -D_FORTIFY_SOURCE=2 */
#define PROBLEM                 {char  
#define MESSAGE                 {char  
#define ERROR                   ),error(R_problem_buf);}
#define RECOVER(x)              ),error(R_problem_buf);}
#define WARNING(x)              ),warning(R_problem_buf);}
#define LOCAL_EVALUATOR         /**/
#define NULL_ENTRY              /**/
#define WARN                    WARNING(NULL)

#endif 												<-- ifndef clause ends here

/* S Like Memory Management */

extern void *R_chk_calloc(size_t, size_t);
extern void *R_chk_realloc(void *, size_t);
extern void R_chk_free(void *);

#define Calloc(n, t)   (t *) R_chk_calloc( (size_t) (n), sizeof(t) )
#define Realloc(p,n,t) (t *) R_chk_realloc( (void *)(p), (size_t)((n) *  
sizeof(t)) ) <-- This is still defined therefore, is it not?

/* S-PLUS 3.x but not 5.x NULLs the pointer in the following */
#define Free(p)        (R_chk_free( (void *)(p) ), (p) = NULL)
#define R_Free(p)      (R_chk_free( (void *)(p) ), (p) = NULL)

#define Memcpy(p,q,n)  memcpy( p, q, (size_t)( (n) * sizeof(*p) ) )


The STRICT_R_HEADERS does not go around the Realloc function so even with  
STRICT_R_HEADERS defined the problem persists.
  To test I placed "#define STRICT_R_HEADERS" at the top of my single cpp  
file before all the include lines as I am not sure how to pass the -D  
function through to the g++ when doing R CMD SHLIB - would putting it in  
one of the PKG_ environment variables work - if so which?


On Thu, 23 Nov 2006 11:13:44 -0000, Prof Brian Ripley  
<ripley at stats.ox.ac.uk> wrote:

> Realloc is defined in R_ext/RS.h, and only if STRICT_R_HEADERS is not  
> defined.  This *is* documented in 'Writing R Extensions'.
> On Thu, 23 Nov 2006, Tom McCallum wrote:
>> Thank you for your reply.  My mistake - I meant Realloc (missed the  
>> 'e').
>> This morning I reinstalled MinGW with all the patches suggested by the
>> Install R on Windows Help page, including w32api-3.7, just to make sure
>> all was as it should be.  I have put
>> #define WIN32_LEAN_AND_MEAN
>> at the top of my cpp file (which I did not know about so that was
>> interesting) but it is still saying there is a conflict between Realloc  
>> in
>> objidl.h and windows.h.  Interesting I had a C file which I _did_ manage
>> to compile with the R.h and windows.h file in without this error coming
>> up.  Could there be something going on with g++ that gcc is ignoring?  I
>> am no sure it iss a clash now as I cannot find Realloc in the R includes
>> but below is some output I have gathered which may be of assistance.
>> In objidl.h (line 532):
>>         STDMETHOD_(void*,Realloc)(THIS_ void*,ULONG) PURE;
>> In R.h it has the solitary line:
>> 	/* for PROBLEM ... Calloc, Realloc, Free, Memcpy, F77_xxxx */
>> 	Can only find a R_alloc but no Realloc.
>> ======ERROR MSG OUTPUT==============
>> $ R CMD SHLIB callcdeclcall.cpp
>> making callcdeclcall.d from callcdeclcall.cpp
>> In file included from
>> c:/MinGW/bin/../lib/gcc/mingw32/3.4.5/../../../../include/objbase.h:73,
>>                  from
>> c:/MinGW/bin/../lib/gcc/mingw32/3.4.5/../../../../include/ole2.h:9,
>>                  from
>> c:/MinGW/bin/../lib/gcc/mingw32/3.4.5/../../../../include/windows.h:111,
>>                  from callcdeclcall.cpp:4:
>> c:/MinGW/bin/../lib/gcc/mingw32/3.4.5/../../../../include/objidl.h:532:45:
>> macro "Realloc" requires 3 arguments, but only 2 given
>> make: *** [callcdeclcall.d] Error 1
>> ======END ERROR MSG OUTPUT==============
>> Headers in CPP file are:
>> #include <R.h>
>> #include <Rinternals.h>
>> #include <Rdefines.h>
>> #include <windows.h>
>> #include <cstdio>
>> Thanks,
>> Tom
>> On Wed, 22 Nov 2006 21:21:15 -0000, Prof Brian Ripley
>> <ripley at stats.ox.ac.uk> wrote:
>>> Where exactly did you get windows.h from? The recommended source is
>>> w32api-3.7.tar.gz, and there is no Ralloc in any of its header files,
>>> including objidl.h.
>>> BTW, do you know about defining WIN32_LEAN_AND_MEAN when including
>>> windows.h?  If not, it is worth finding out about.
>>> On Wed, 22 Nov 2006, Tom McCallum wrote:
>>>> Hi everyone,
>>>> Have been trying to include windows.h (from MinGW) and R.h into a
>>>> package
>>>> and have found that Ralloc is coming up as a clash no matter which
>>>> include
>>>> ordering I use.  In windows it has 2 arguments and is defined in
>>>> objidl.h
>>>> and in R.h it is 3 arguments.  Any ideas of how to work round this?
>>>> Have
>>>> checked the web and have not seen anyone else comment on this.

Dr. Thomas McCallum
Systems Architect,
Level E Limited
ETTC, The King's Buildings
Mayfield Road,
Edinburgh EH9 3JL, UK
Work  +44 (0) 131 472 4813
Fax:  +44 (0) 131 472 4719
Email: tom at levelelimited.com

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