I have noticed the following email in gcc-patches: On 20 March 2012 10:41, Tristan Gingold wrote: > Hi, > > ggc-page.c uses size_t to cast pointers to an integer type. Unfortunately, this isn't portable for systems (such as … VMS) where size_t precision is less than pointers precision. > > Fortunately, thanks to configure, uintptr_t type is always present, so this path simply replaces size_t by uintptr_t for such conversions (but still keeping size_t for size expressions). >[...] This is interesting for me from C++ library author point of view. I have always silently (without support in the ISO standard) assumed that std::size_t is the same or bigger width than data pointers. This is true for all platforms I have ever worked with. But I have never worked with VMS. So, the question is: Is there a native C++ type that is the same bit width as pointers on VMS? Maybe std::ptrdiff_t? -- VZ
