This is also an issue on the Tru64 / alpha on Snakebite: that platform has inttypes.h but no stdint.h, and inttypes.h has typedefs for uint32_t and friends, but no defines for UINT32_MAX, etc. So the pyport.h check:
#if (defined UINT32_MAX || defined uint32_t)
fails (uint32_t is a typedef rather than a #define). To make matters worse, the autoconf macro AC_TYPE_UINT32_T correctly detects that uint32_t exists, so doesn't bother to define it.
The ideal place to fix this would be in the configure scripts.