From e8bd88d1fcded01ccd066572eeaae1b507989cb3 Mon Sep 17 00:00:00 2001 From: RincewindsHat <12514511+RincewindsHat@users.noreply.github.com> Date: Tue, 31 Jan 2023 14:46:01 +0100 Subject: Sync with the latest Gnulib code 668c0b8ffa --- gl/m4/mktime.m4 | 142 +++++++++++++++++++++++++++++++++++++++++--------------- 1 file changed, 104 insertions(+), 38 deletions(-) (limited to 'gl/m4/mktime.m4') diff --git a/gl/m4/mktime.m4 b/gl/m4/mktime.m4 index faefb770..e9d31f35 100644 --- a/gl/m4/mktime.m4 +++ b/gl/m4/mktime.m4 @@ -1,5 +1,5 @@ -# serial 25 -dnl Copyright (C) 2002-2003, 2005-2007, 2009-2013 Free Software Foundation, +# serial 37 +dnl Copyright (C) 2002-2003, 2005-2007, 2009-2023 Free Software Foundation, dnl Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -7,24 +7,40 @@ dnl with or without modifications, as long as this notice is preserved. dnl From Jim Meyering. -AC_DEFUN([gl_FUNC_MKTIME], +AC_DEFUN([gl_TIME_T_IS_SIGNED], +[ + AC_CACHE_CHECK([whether time_t is signed], + [gl_cv_time_t_is_signed], + [AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM([[#include + char time_t_signed[(time_t) -1 < 0 ? 1 : -1];]])], + [gl_cv_time_t_is_signed=yes], + [gl_cv_time_t_is_signed=no])]) + if test $gl_cv_time_t_is_signed = yes; then + AC_DEFINE([TIME_T_IS_SIGNED], [1], [Define to 1 if time_t is signed.]) + fi +]) + +dnl Test whether mktime works. Set gl_cv_func_working_mktime. +AC_DEFUN([gl_FUNC_MKTIME_WORKS], [ - AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS]) + AC_REQUIRE([gl_TIME_T_IS_SIGNED]) + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles dnl We don't use AC_FUNC_MKTIME any more, because it is no longer maintained dnl in Autoconf and because it invokes AC_LIBOBJ. AC_CHECK_HEADERS_ONCE([unistd.h]) AC_CHECK_DECLS_ONCE([alarm]) AC_REQUIRE([gl_MULTIARCH]) - if test $APPLE_UNIVERSAL_BUILD = 1; then - # A universal build on Apple Mac OS X platforms. - # The test result would be 'yes' in 32-bit mode and 'no' in 64-bit mode. - # But we need a configuration result that is valid in both modes. - gl_cv_func_working_mktime=no - fi AC_CACHE_CHECK([for working mktime], [gl_cv_func_working_mktime], - [AC_RUN_IFELSE( - [AC_LANG_SOURCE( + [if test $APPLE_UNIVERSAL_BUILD = 1; then + # A universal build on Apple Mac OS X platforms. + # The test result would be 'yes' in 32-bit mode and 'no' in 64-bit mode. + # But we need a configuration result that is valid in both modes. + gl_cv_func_working_mktime="guessing no" + else + AC_RUN_IFELSE( + [AC_LANG_SOURCE( [[/* Test program from Paul Eggert and Tony Leneis. */ #include #include @@ -38,8 +54,11 @@ AC_DEFUN([gl_FUNC_MKTIME], # include #endif -/* Work around redefinition to rpl_putenv by other config tests. */ -#undef putenv +]GL_MDA_DEFINES[ + +#ifndef TIME_T_IS_SIGNED +# define TIME_T_IS_SIGNED 0 +#endif static time_t time_t_max; static time_t time_t_min; @@ -63,7 +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; @@ -151,7 +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); @@ -162,6 +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 () { @@ -169,7 +209,6 @@ main () time_t t, delta; int i, j; int time_t_signed_magnitude = (time_t) ~ (time_t) 0 < (time_t) -1; - int time_t_signed = ! ((time_t) 0 < (time_t) -1); #if HAVE_DECL_ALARM /* This test makes some buggy mktime implementations loop. @@ -179,11 +218,11 @@ main () alarm (60); #endif - time_t_max = (! time_t_signed + time_t_max = (! TIME_T_IS_SIGNED ? (time_t) -1 : ((((time_t) 1 << (sizeof (time_t) * CHAR_BIT - 2)) - 1) * 2 + 1)); - time_t_min = (! time_t_signed + time_t_min = (! TIME_T_IS_SIGNED ? (time_t) 0 : time_t_signed_magnitude ? ~ (time_t) 0 @@ -218,35 +257,62 @@ main () result |= 16; if (! spring_forward_gap ()) result |= 32; - if (! year_2050_test ()) + if (! year_2050_test () || ! indiana_test ()) result |= 64; return result; }]])], - [gl_cv_func_working_mktime=yes], - [gl_cv_func_working_mktime=no], - [gl_cv_func_working_mktime=no]) + [gl_cv_func_working_mktime=yes], + [gl_cv_func_working_mktime=no], + [case "$host_os" in + # Guess no on native Windows. + mingw*) gl_cv_func_working_mktime="guessing no" ;; + *) gl_cv_func_working_mktime="$gl_cross_guess_normal" ;; + esac + ]) + fi ]) +]) + +dnl Main macro of module 'mktime'. +AC_DEFUN([gl_FUNC_MKTIME], +[ + AC_REQUIRE([gl_TIME_H_DEFAULTS]) + AC_REQUIRE([AC_CANONICAL_HOST]) + AC_REQUIRE([gl_FUNC_MKTIME_WORKS]) - if test $gl_cv_func_working_mktime = no; then + REPLACE_MKTIME=0 + if test "$gl_cv_func_working_mktime" != yes; then REPLACE_MKTIME=1 - else - REPLACE_MKTIME=0 + AC_DEFINE([NEED_MKTIME_WORKING], [1], + [Define if the compilation of mktime.c should define 'mktime' + with the algorithmic workarounds.]) fi + case "$host_os" in + mingw*) + REPLACE_MKTIME=1 + AC_DEFINE([NEED_MKTIME_WINDOWS], [1], + [Define if the compilation of mktime.c should define 'mktime' + with the native Windows TZ workaround.]) + ;; + esac ]) +dnl Main macro of module 'mktime-internal'. AC_DEFUN([gl_FUNC_MKTIME_INTERNAL], [ - AC_REQUIRE([gl_FUNC_MKTIME]) - if test $REPLACE_MKTIME = 0; then - dnl BeOS has __mktime_internal in libc, but other platforms don't. - AC_CHECK_FUNC([__mktime_internal], - [AC_DEFINE([mktime_internal], [__mktime_internal], - [Define to the real name of the mktime_internal function.]) - ], - [dnl mktime works but it doesn't export __mktime_internal, - dnl so we need to substitute our own mktime implementation. - REPLACE_MKTIME=1 - ]) - fi + AC_REQUIRE([gl_FUNC_MKTIME_WORKS]) + + WANT_MKTIME_INTERNAL=0 + dnl BeOS has __mktime_internal in libc, but other platforms don't. + AC_CHECK_FUNC([__mktime_internal], + [AC_DEFINE([mktime_internal], [__mktime_internal], + [Define to the real name of the mktime_internal function.]) + ], + [dnl mktime works but it doesn't export __mktime_internal, + dnl so we need to substitute our own mktime implementation. + WANT_MKTIME_INTERNAL=1 + AC_DEFINE([NEED_MKTIME_INTERNAL], [1], + [Define if the compilation of mktime.c should define 'mktime_internal'.]) + ]) ]) # Prerequisites of lib/mktime.c. -- cgit v1.2.3-74-g34f1