On Mon, 29 Aug 2005, Harris, Michael (NIH/NCI) [E] wrote:
>
> I am getting a compile warning when building R from source. I am building
> on a AMD64 Opteron system with gcc (GCC) 3.3.3 (SuSE Linux)
>
> The warning is:
>
> unique.c: In function `cshash':
>
> unique.c:1146: warning: cast from pointer to integer of different size
>
The comment immediately above this suggests that it is deliberate
/* Use hashing to improve object.size. Here we want equal CHARSXPs,
not equal contents. This only uses the bottom 32 bits of the pointer,
but for now that's almost certainly OK */
The warning is presumably because casting this int back to a pointer would
fail (and is a common 32 to 64bit conversion error), but that's not what
is happening here.
-thomas
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