diff options
Diffstat (limited to 'm4/mktime.m4')
| -rw-r--r-- | m4/mktime.m4 | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/m4/mktime.m4 b/m4/mktime.m4 index d48f40d187b..431b17dcb0d 100644 --- a/m4/mktime.m4 +++ b/m4/mktime.m4 @@ -1,4 +1,4 @@ -# serial 36 +# serial 37 dnl Copyright (C) 2002-2003, 2005-2007, 2009-2022 Free Software Foundation, dnl Inc. dnl This file is free software; the Free Software Foundation @@ -82,7 +82,8 @@ spring_forward_gap () 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"); + if (putenv ("TZ=PST8PDT,M4.1.0,M10.5.0") != 0) + return -1; tm.tm_year = 98; tm.tm_mon = 3; @@ -170,7 +171,8 @@ year_2050_test () 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"); + if (putenv ("TZ=PST8PDT,M4.1.0,M10.5.0") != 0) + return -1; t = mktime (&tm); @@ -181,6 +183,25 @@ year_2050_test () || (0 < t && answer - 120 <= t && t <= answer + 120)); } +static int +indiana_test () +{ + if (putenv ("TZ=America/Indiana/Indianapolis") != 0) + return -1; + struct tm tm; + tm.tm_year = 1986 - 1900; tm.tm_mon = 4 - 1; tm.tm_mday = 28; + tm.tm_hour = 16; tm.tm_min = 24; tm.tm_sec = 50; tm.tm_isdst = 0; + time_t std = mktime (&tm); + if (! (std == 515107490 || std == 515107503)) + return 1; + + /* This platform supports TZDB, either without or with leap seconds. + Return true if GNU Bug#48085 is absent. */ + tm.tm_isdst = 1; + time_t dst = mktime (&tm); + return std - dst == 60 * 60; +} + int main () { @@ -236,7 +257,7 @@ main () result |= 16; if (! spring_forward_gap ()) result |= 32; - if (! year_2050_test ()) + if (! year_2050_test () || ! indiana_test ()) result |= 64; return result; }]])], |