[Rivet] [rivet] root!=ansi compatible

[James Monk]

On 2 Oct 2007, at 17:36, Andy Buckley wrote:

> I've seen some of these warnings, but this sounds much more  
> serious. I thought
> that the use of the -permissive flag (i.e. "Mr G++, I'm trying to  
> compile some
> really shoddy code, so please be forgiving") was enough to let ROOT  
> compile,
> but by the looks of things this doesn't extend to the 64 bit case.

Yes, this page from IBM seems to confirm what I suspected:

	http://www.ibm.com/developerworks/library/l-port64.html   (look at  
table 1)

Because long only promises to be #at least# 32 bits long it is  
perfectly fine and makes sense for it to be 64 bits on a 64 bit  
system.  long long promises to be at least 64 bits long, so can be  
the same as a long on a 64 bit system.  I thought the whole point of  
all those foo_t types in root was that they have the same length  
regardless of the OS (like Java), but it would seem not.