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This patch provides autoconf tests for each field used in wraptime.cc referencing struct tm and struct timeval. libgm2/ChangeLog: PR modula2/115276 * config.h.in: Regenerate. * configure: Regenerate. * configure.ac (AC_STRUCT_TIMEZONE): Add. (AC_CHECK_MEMBER): Test for struct tm.tm_year. (AC_CHECK_MEMBER): Test for struct tm.tm_mon. (AC_CHECK_MEMBER): Test for struct tm.tm_mday. (AC_CHECK_MEMBER): Test for struct tm.tm_hour. (AC_CHECK_MEMBER): Test for struct tm.tm_min. (AC_CHECK_MEMBER): Test for struct tm.tm_sec. (AC_CHECK_MEMBER): Test for struct tm.tm_year. (AC_CHECK_MEMBER): Test for struct tm.tm_yday. (AC_CHECK_MEMBER): Test for struct tm.tm_wday. (AC_CHECK_MEMBER): Test for struct tm.tm_isdst. (AC_CHECK_MEMBER): Test for struct timeval.tv_sec. (AC_CHECK_MEMBER): Test for struct timeval.tv_sec. (AC_CHECK_MEMBER): Test for struct timeval.tv_usec. * libm2iso/wraptime.cc (InitTimeval): Guard against lack struct timeval and malloc. (InitTimezone): Guard against lack of struct tm.tm_zone and malloc. (KillTimezone): Ditto. (InitTimeval): Guard against lack of struct timeval and malloc. (KillTimeval): Guard against lack of malloc. (settimeofday): Guard against lack of struct tm.tm_zone. (GetFractions): Guard against lack of struct timeval. (localtime_r): Ditto. (GetYear): Guard against lack of struct tm. (GetMonth): Ditto. (GetDay): Ditto. (GetHour): Ditto. (GetMinute): Ditto. (GetSecond): Ditto. (GetSummerTime): Ditto. (GetDST): Guards against lack of struct timezone. (SetTimezone): Ditto. (SetTimeval): Guard against lack of struct tm. Signed-off-by: Gaius Mulley <gaiusmod2@gmail.com>