2.21.1 Supported platforms
SWI-Prolog can be compiled for a 
32- or 64-bit address space on any system with a suitable C compiler. 
Pointer arithmetic is based on the type (u)intptr_t from stdint.h, 
with suitable emulation on MS-Windows.
SWI-Prolog can be compiled for a 
32- or 64-bit address space on any system with a suitable C compiler. 
Pointer arithmetic is based on the type (u)intptr_t from stdint.h, 
with suitable emulation on MS-Windows.