On 23/10/20 6:06 pm, Russell Shaw wrote:
On 23/10/20 5:54 pm, Anatoli wrote:
Russell,
Thanks for your suggestion. The problem is, as I mentioned in the initial
post, on amd64 sizeof(time_t) is always 8 bytes, as well as long and long
long, so sizeof(time_t) == sizeof(long int) == sizeof(long long int).
I've actually tried the following directly in configure.ac (for this test
it's not needed to run a custom code):
#if (SIZEOF_TIME_T == SIZEOF_LONG_LONG_INT) #define TIME_T_FMT "%lld" #elif
(SIZEOF_TIME_T == SIZEOF_LONG) #define TIME_T_FMT "%ld" #else #error dont
know what to use for TIME_T_FMT #endif
But both checks are true so it makes no sense.
I need something that would not depend on the size of the type. Not sure it's
even possible.
I might be missing something simple because i got up too early.
If a platform has time_t the same size as a long and long long, does it matter
whether the printf uses "%ld" or "%lld" ?
[For GNU C this is "the same" as both are of 8 bytes, but clang generates a
warning like: "warning: format specifies type 'long' but the argument has type
'time_t' (aka 'long long')".]
I see that is the actual problem.
If the compiler complains, then maybe you could capture that complaint output.
Bit of a messy test.
