Should I use C types (uint8_t/.../uint64_t) or (u_int8_t/.../u_int64_t)?

Question

My GNU-Linux platform (debian stretch) has the C types u_int8_t, u_int16_t, u_int32_t and u_int64_t defined in the file sys/types.h while uint8_t, uint16_t, uint32_t and uint64_t are defined in stdint.h. I have found these types useful in the course of practicing X86-64 assembly language and interacting with C. Is there any reason why I should prefer one header file over the other (be it 'best practice', portability etc.)?. Is the answer any different for C++?

Answer 1

stdint.h is standard C, which maps to cstdint in standard C++.

sys/types.h is not portable C.