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time: Fix compilation on Solaris

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The tm_gmtoff field of the broken-down time 'tm' struct wasn't formally standardized until POSIX.1-2024, but practically it has been available on desktop *nix platforms such as Linux/glibc, FreeBSD, OpenBSD, NetBSD, OSX/macOS (NextStep before that), and others since the 1990s. The notable exception is SunOS/Solaris, where the timezone offset must still be retrieved in the strictly POSIX.1-2008 compliant way.

(cherry picked from commit 7b93a744c8)
This commit is contained in:
Frank Praznik
2025-03-19 11:58:05 -04:00
parent 0ac030549b
commit a5b51669fb
1 changed files with 17 additions and 0 deletions
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17
src/time/unix/SDL_systime.c
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@@ -27,6 +27,7 @@
#include <langinfo.h>
#include <sys/time.h>
#include <time.h>
#include <unistd.h>
#if !defined(HAVE_CLOCK_GETTIME) && defined(SDL_PLATFORM_APPLE)
#include <mach/clock.h>
@@ -186,7 +187,23 @@ bool SDL_TimeToDateTime(SDL_Time ticks, SDL_DateTime *dt, bool localTime)
dt->second = tm->tm_sec;
dt->nanosecond = ticks % SDL_NS_PER_SECOND;
dt->day_of_week = tm->tm_wday;
/* tm_gmtoff wasn't formally standardized until POSIX.1-2024, but practically it has been available on desktop
* *nix platforms such as Linux/glibc, FreeBSD, OpenBSD, NetBSD, OSX/macOS, and others since the 1990s.
*
* The notable exception is Solaris, where the timezone offset must still be retrieved in the strictly POSIX.1-2008
* compliant way.
*/
#if (_POSIX_VERSION >= 202405L) || (!defined(sun) && !defined(__sun))
dt->utc_offset = (int)tm->tm_gmtoff;
#else
if (localTime) {
tzset();
dt->utc_offset = (int)timezone;
} else {
dt->utc_offset = 0;
}
#endif
return true;
}