Re-apply [1346], which was reverted in [1348], now that padding should no longer be a problem. As noted before, this will break ABI-compatibility on x86-64, so recompile old code before linking with newly-compiled code if you're on x86-64. As an added bonus, I actually tested it this time :).

#ifndef __RMEM_H__
#define __RMEM_H__

// jam memory stuff here

#include "mem.h"

#if (defined (__SVR4) && defined (__sun))
#include <alloca.h>
#endif

#ifdef __MINGW32__
#include <malloc.h>
#endif

#endif // __RMEM_H__