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This patch adds corrections to defensively check against glibc functions, structures and contains fallbacks. These fixes were required under Darwin. gcc/m2/ChangeLog: PR modula2/110779 * gm2-libs-iso/SysClock.mod (EpochTime): New procedure. (GetClock): Call EpochTime if the C time functions are unavailable. * gm2-libs-iso/wrapclock.def (istimezone): New function definition. libgm2/ChangeLog: PR modula2/110779 * configure: Regenerate. * configure.ac: Provide special case test for Darwin cross configuration. (GLIBCXX_CONFIGURE): New statement. (GLIBCXX_CHECK_GETTIMEOFDAY): New statement. (GLIBCXX_ENABLE_LIBSTDCXX_TIME): New statement. * libm2iso/wrapclock.cc: New sys/time.h conditional include. (sys/syscall.h): Conditional include. (unistd.h): Conditional include. (GetTimeRealtime): Re-implement. (SetTimeRealtime): Re-implement. (timezone): Re-implement. (istimezone): New function. (daylight): Re-implement. (isdst): Re-implement. (tzname): Re-implement. Signed-off-by: Gaius Mulley <gaiusmod2@gmail.com>
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