https://bugs.gentoo.org/220040 https://bugs.gentoo.org/570208 update mktime check to latest autoconf version which is less buggy --- a/configure +++ b/configure @@ -13496,26 +14256,25 @@ cat >>conftest.$ac_ext <<_ACEOF /* end confdefs.h. */ /* Test program from Paul Eggert and Tony Leneis. */ -#if TIME_WITH_SYS_TIME +#ifdef TIME_WITH_SYS_TIME # include # include #else -# if HAVE_SYS_TIME_H +# ifdef HAVE_SYS_TIME_H # include # else # include # endif #endif -#if HAVE_STDLIB_H -# include -#endif +#include +#include -#if HAVE_UNISTD_H +#ifdef HAVE_UNISTD_H # include #endif -#if !HAVE_ALARM +#ifndef HAVE_ALARM # define alarm(X) /* empty */ #endif @@ -13531,9 +14291,9 @@ }; #define N_STRINGS (sizeof (tz_strings) / sizeof (tz_strings[0])) -/* Fail if mktime fails to convert a date in the spring-forward gap. +/* Return 0 if mktime fails to convert a date in the spring-forward gap. Based on a problem report from Andreas Jaeger. */ -static void +static int spring_forward_gap () { /* glibc (up to about 1998-10-07) failed this test. */ @@ -13552,29 +14312,27 @@ tm.tm_min = 0; tm.tm_sec = 0; tm.tm_isdst = -1; - if (mktime (&tm) == (time_t)-1) - exit (1); + return mktime (&tm) != (time_t) -1; } -static void +static int mktime_test1 (now) time_t now; { struct tm *lt; - if ((lt = localtime (&now)) && mktime (lt) != now) - exit (1); + return ! (lt = localtime (&now)) || mktime (lt) == now; } -static void +static int mktime_test (now) time_t now; { - mktime_test1 (now); - mktime_test1 ((time_t) (time_t_max - now)); - mktime_test1 ((time_t) (time_t_min + now)); + return (mktime_test1 (now) + && mktime_test1 ((time_t) (time_t_max - now)) + && mktime_test1 ((time_t) (time_t_min + now))); } -static void +static int irix_6_4_bug () { /* Based on code from Ariel Faigon. */ @@ -13585,11 +14345,10 @@ tm.tm_sec = 0; tm.tm_isdst = -1; mktime (&tm); - if (tm.tm_mon != 2 || tm.tm_mday != 31) - exit (1); + return tm.tm_mon == 2 && tm.tm_mday == 31; } -static void +static int bigtime_test (j) int j; { @@ -13614,8 +14370,39 @@ && lt->tm_wday == tm.tm_wday && ((lt->tm_isdst < 0 ? -1 : 0 < lt->tm_isdst) == (tm.tm_isdst < 0 ? -1 : 0 < tm.tm_isdst)))) - exit (1); + return 0; } + return 1; +} + +static int +year_2050_test () +{ + /* The correct answer for 2050-02-01 00:00:00 in Pacific time, + ignoring leap seconds. */ + unsigned long int answer = 2527315200UL; + + struct tm tm; + time_t t; + tm.tm_year = 2050 - 1900; + tm.tm_mon = 2 - 1; + tm.tm_mday = 1; + tm.tm_hour = tm.tm_min = tm.tm_sec = 0; + tm.tm_isdst = -1; + + /* Use the portable POSIX.1 specification "TZ=PST8PDT,M4.1.0,M10.5.0" + instead of "TZ=America/Vancouver" in order to detect the bug even + on systems that don't support the Olson extension, or don't have the + full zoneinfo tables installed. */ + putenv ("TZ=PST8PDT,M4.1.0,M10.5.0"); + + t = mktime (&tm); + + /* Check that the result is either a failure, or close enough + to the correct answer that we can assume the discrepancy is + due to leap seconds. */ + return (t == (time_t) -1 + || (0 < t && answer - 120 <= t && t <= answer + 120)); } int @@ -13629,12 +14416,15 @@ isn't worth using anyway. */ alarm (60); - for (time_t_max = 1; 0 < time_t_max; time_t_max *= 2) - continue; - time_t_max--; - if ((time_t) -1 < 0) - for (time_t_min = -1; (time_t) (time_t_min * 2) < 0; time_t_min *= 2) - continue; + for (;;) + { + t = (time_t_max << 1) + 1; + if (t <= time_t_max) + break; + time_t_max = t; + } + time_t_min = - ((time_t) ~ (time_t) 0 == (time_t) -1) - time_t_max; + delta = time_t_max / 997; /* a suitable prime number */ for (i = 0; i < N_STRINGS; i++) { @@ -13642,18 +14432,22 @@ putenv (tz_strings[i]); for (t = 0; t <= time_t_max - delta; t += delta) - mktime_test (t); - mktime_test ((time_t) 1); - mktime_test ((time_t) (60 * 60)); - mktime_test ((time_t) (60 * 60 * 24)); - - for (j = 1; 0 < j; j *= 2) - bigtime_test (j); - bigtime_test (j - 1); + if (! mktime_test (t)) + return 1; + if (! (mktime_test ((time_t) 1) + && mktime_test ((time_t) (60 * 60)) + && mktime_test ((time_t) (60 * 60 * 24)))) + return 1; + + for (j = 1; ; j <<= 1) + if (! bigtime_test (j)) + return 1; + else if (INT_MAX / 2 < j) + break; + if (! bigtime_test (INT_MAX)) + return 1; } - irix_6_4_bug (); - spring_forward_gap (); - exit (0); + return ! (irix_6_4_bug () && spring_forward_gap () && year_2050_test ()); } _ACEOF rm -f conftest$ac_exeext