2012/12/21 Paolo Carlini <paolo.carl...@oracle.com>: > On 12/21/2012 10:36 AM, Kai Tietz wrote: >> >> well, issue isn't that 'long' is always 'ptrdiff_t'. > > But then, if we just change the type without paying attention to size (and > alignment) aren't we looking for BIG ABI trouble?!?
Huh? We have ABI-trouble due long is too small to hold a pointer-diff for llp64. Intended is here 'pointer-size' AFAICS in code, but with wrong assumption that a 'long' is always long enough. Btw I just checked all targets we have right now in gcc. The type ptrdiff_t is always either 'long', or 'int' (ilp32, lp64), and 'long long' for LLP64. Means ptrdiff_t gets always equal (or bigger) to biggest pointer-size for target (AFAICS). Kai
