UPDATE regarding "_t" suffix:

POSIX reserves "_t" suffix everywhere (not just for identifiers beginning with "int"/"uint" from <stdint.h>); references: https://www.gnu.org/software/libc/manual/html_node/Reserved-..., https://pubs.opengroup.org/onlinepubs/9699919799/functions/V....

So I actually stand by my original comment that the convention of using "_t" suffix shouldn't be recommended. (It's just that the reasoning is for conformance with POSIX rather than with ISO C.)