time_t will remain 32-bit to avoid breaking ABI compatibility. However, Linux on 32-bit platforms has a full set of syscalls that return time64_t values. I don’t know about other distros, but since 24.04 Ubuntu has had everything in its repositories using those calls.
My 32-bit VM:
type : size (bytes) int : 4 long : 4 long long: 8 double : 8 time_t : 4 float : 4 l double : 12 int8_t : 1 INT8_MAX : 127 int16_t : 2 INT16_MAX : 32767 int32t : 4 INT32_MAX : 2147483647 int64_t : 8 INT64_MAX : 9223372036854775807 uint8_t : 1 UINT8_MAX : 255 uint16_t : 2 UINT16_MAX: 65535 uint32t : 4 UINT32_MAX: 4294967295 uint64_t : 8 UINT64_MAX: 18446744073709551615It does support 64-bit sizes, weirdly enough
time_tis not one of them.time_twill remain 32-bit to avoid breaking ABI compatibility. However, Linux on 32-bit platforms has a full set of syscalls that returntime64_tvalues. I don’t know about other distros, but since 24.04 Ubuntu has had everything in its repositories using those calls.