this post was submitted on 23 Jan 2025
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x86 32-bit Operating Systems Aren't Dead Yet: New Linux Patches Improve 32-bit PAE (www.phoronix.com)
submitted 19 hours ago by [email protected] to c/linux
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[–] sudoku 4 points 11 hours ago (1 children)

I believe they use 64 bit time even on 32 bit systems

[–] 0x0 3 points 5 hours ago (1 children)

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: 18446744073709551615

It does support 64-bit sizes, weirdly enough time_t is not one of them.

[–] [email protected] 2 points 3 hours ago

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.