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annotate m4/mktime.m4 @ 17355:9855b352e525

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regex: port to mingw's recent addition of undeclared alarm On mingw (at least, when cross-compiling with Fedora 18's mingw32-headers-2.0.999-0.15.trunk.20121110.fc18.noarch build), compilation of test-regex fails: test-regex.c: In function 'main': test-regex.c:42:11: error: 'SIGALRM' undeclared (first use in this function) test-regex.c:42:11: note: each undeclared identifier is reported only once for each function it appears in test-regex.c:43:3: warning: implicit declaration of function 'alarm' It turns out that recent mingw64 added an export of alarm() and SIGALRM, but guarded their declarations behind __USE_MINGW_ALARM (default off, and with alarm() only in the non-standard <io.h>); so the m4 tests were setting HAVE_ALARM to 1 based on link success but then failing to compile. * doc/posix-functions/alarm.texi (alarm): Document that alarm exists but still doesn't work in newer mingw. * m4/frexp.m4 (gl_FUNC_FREXP_WORKS): Check for alarm declaration, not existence. Ensure SIGALRM is not trapped. * m4/mktime.m4 (gl_FUNC_MKTIME): Likewise. * m4/regex.m4 (gl_REGEX): Likewise. * m4/remainderf.m4 (gl_FUNC_REMAINDERF_WORKS): Likewise. * tests/test-regex.c (main): Use correct probe for alarm. Signed-off-by: Eric Blake <eblake@redhat.com>
author Eric Blake <eblake@redhat.com>
date Mon, 11 Mar 2013 14:51:33 -0600
parents e542fd46ad6f
children a4a11de07980
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1 # serial 25
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2 dnl Copyright (C) 2002-2003, 2005-2007, 2009-2013 Free Software Foundation,
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Jim Meyering <meyering@redhat.com>
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3 dnl Inc.
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4 dnl This file is free software; the Free Software Foundation
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5 dnl gives unlimited permission to copy and/or distribute it,
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6 dnl with or without modifications, as long as this notice is preserved.
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7c1a6b73f48e An autoconf macro for its associated module.
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7
7c1a6b73f48e An autoconf macro for its associated module.
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8 dnl From Jim Meyering.
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9
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10 AC_DEFUN([gl_FUNC_MKTIME],
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11 [
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12 AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
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13
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14 dnl We don't use AC_FUNC_MKTIME any more, because it is no longer maintained
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15 dnl in Autoconf and because it invokes AC_LIBOBJ.
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16 AC_CHECK_HEADERS_ONCE([unistd.h])
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17 AC_CHECK_DECLS_ONCE([alarm])
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18 AC_REQUIRE([gl_MULTIARCH])
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19 if test $APPLE_UNIVERSAL_BUILD = 1; then
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20 # A universal build on Apple Mac OS X platforms.
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21 # The test result would be 'yes' in 32-bit mode and 'no' in 64-bit mode.
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22 # But we need a configuration result that is valid in both modes.
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23 gl_cv_func_working_mktime=no
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24 fi
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25 AC_CACHE_CHECK([for working mktime], [gl_cv_func_working_mktime],
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26 [AC_RUN_IFELSE(
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27 [AC_LANG_SOURCE(
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28 [[/* Test program from Paul Eggert and Tony Leneis. */
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29 #include <limits.h>
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30 #include <stdlib.h>
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31 #include <time.h>
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32
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33 #ifdef HAVE_UNISTD_H
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34 # include <unistd.h>
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35 #endif
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36
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37 #ifndef HAVE_DECL_ALARM
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38 # include <signal.h>
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39 #endif
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40
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41 /* Work around redefinition to rpl_putenv by other config tests. */
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42 #undef putenv
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43
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44 static time_t time_t_max;
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45 static time_t time_t_min;
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46
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47 /* Values we'll use to set the TZ environment variable. */
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48 static char *tz_strings[] = {
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49 (char *) 0, "TZ=GMT0", "TZ=JST-9",
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50 "TZ=EST+3EDT+2,M10.1.0/00:00:00,M2.3.0/00:00:00"
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51 };
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52 #define N_STRINGS (sizeof (tz_strings) / sizeof (tz_strings[0]))
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53
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54 /* Return 0 if mktime fails to convert a date in the spring-forward gap.
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55 Based on a problem report from Andreas Jaeger. */
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56 static int
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57 spring_forward_gap ()
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58 {
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59 /* glibc (up to about 1998-10-07) failed this test. */
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60 struct tm tm;
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61
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62 /* Use the portable POSIX.1 specification "TZ=PST8PDT,M4.1.0,M10.5.0"
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63 instead of "TZ=America/Vancouver" in order to detect the bug even
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64 on systems that don't support the Olson extension, or don't have the
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65 full zoneinfo tables installed. */
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66 putenv ("TZ=PST8PDT,M4.1.0,M10.5.0");
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67
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68 tm.tm_year = 98;
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69 tm.tm_mon = 3;
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70 tm.tm_mday = 5;
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71 tm.tm_hour = 2;
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72 tm.tm_min = 0;
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73 tm.tm_sec = 0;
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74 tm.tm_isdst = -1;
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75 return mktime (&tm) != (time_t) -1;
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76 }
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77
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78 static int
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79 mktime_test1 (time_t now)
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80 {
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81 struct tm *lt;
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82 return ! (lt = localtime (&now)) || mktime (lt) == now;
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83 }
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84
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85 static int
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86 mktime_test (time_t now)
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87 {
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88 return (mktime_test1 (now)
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89 && mktime_test1 ((time_t) (time_t_max - now))
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90 && mktime_test1 ((time_t) (time_t_min + now)));
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91 }
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92
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93 static int
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94 irix_6_4_bug ()
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95 {
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96 /* Based on code from Ariel Faigon. */
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97 struct tm tm;
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98 tm.tm_year = 96;
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99 tm.tm_mon = 3;
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100 tm.tm_mday = 0;
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101 tm.tm_hour = 0;
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102 tm.tm_min = 0;
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103 tm.tm_sec = 0;
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104 tm.tm_isdst = -1;
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105 mktime (&tm);
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106 return tm.tm_mon == 2 && tm.tm_mday == 31;
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107 }
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108
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109 static int
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110 bigtime_test (int j)
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111 {
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112 struct tm tm;
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113 time_t now;
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114 tm.tm_year = tm.tm_mon = tm.tm_mday = tm.tm_hour = tm.tm_min = tm.tm_sec = j;
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
115 now = mktime (&tm);
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
116 if (now != (time_t) -1)
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
117 {
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
118 struct tm *lt = localtime (&now);
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
119 if (! (lt
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff changeset
120 && lt->tm_year == tm.tm_year
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11744
diff changeset
121 && lt->tm_mon == tm.tm_mon
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11744
diff changeset
122 && lt->tm_mday == tm.tm_mday
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11744
diff changeset
123 && lt->tm_hour == tm.tm_hour
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11744
diff changeset
124 && lt->tm_min == tm.tm_min
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11744
diff changeset
125 && lt->tm_sec == tm.tm_sec
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11744
diff changeset
126 && lt->tm_yday == tm.tm_yday
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11744
diff changeset
127 && lt->tm_wday == tm.tm_wday
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff changeset
128 && ((lt->tm_isdst < 0 ? -1 : 0 < lt->tm_isdst)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11744
diff changeset
129 == (tm.tm_isdst < 0 ? -1 : 0 < tm.tm_isdst))))
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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diff changeset
130 return 0;
4348
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diff changeset
131 }
7276
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
132 return 1;
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
133 }
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
134
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
135 static int
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
136 year_2050_test ()
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
137 {
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
138 /* The correct answer for 2050-02-01 00:00:00 in Pacific time,
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
139 ignoring leap seconds. */
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
140 unsigned long int answer = 2527315200UL;
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
141
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
142 struct tm tm;
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
143 time_t t;
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
144 tm.tm_year = 2050 - 1900;
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
145 tm.tm_mon = 2 - 1;
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
146 tm.tm_mday = 1;
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
147 tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
148 tm.tm_isdst = -1;
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
149
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
150 /* Use the portable POSIX.1 specification "TZ=PST8PDT,M4.1.0,M10.5.0"
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
151 instead of "TZ=America/Vancouver" in order to detect the bug even
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
152 on systems that don't support the Olson extension, or don't have the
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
153 full zoneinfo tables installed. */
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
154 putenv ("TZ=PST8PDT,M4.1.0,M10.5.0");
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
155
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
156 t = mktime (&tm);
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
157
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
158 /* Check that the result is either a failure, or close enough
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
159 to the correct answer that we can assume the discrepancy is
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
160 due to leap seconds. */
4be2c469b318 * config/srclist.txt: Temporarily comment out mktime.c until glibc bug
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
161 return (t == (time_t) -1
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11744
diff changeset
162 || (0 < t && answer - 120 <= t && t <= answer + 120));
4348
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
163 }
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
164
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
165 int
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
166 main ()
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
167 {
13918
d5a74c6ec06b Put more information about failed tests into the test return codes.
Bruno Haible <bruno@clisp.org>
parents: 13695
diff changeset
168 int result = 0;
4348
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
169 time_t t, delta;
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
170 int i, j;
14245
21a50d7b2537 mktime: avoid infinite loop
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
171 int time_t_signed_magnitude = (time_t) ~ (time_t) 0 < (time_t) -1;
21a50d7b2537 mktime: avoid infinite loop
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
172 int time_t_signed = ! ((time_t) 0 < (time_t) -1);
4348
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
173
17355
9855b352e525 regex: port to mingw's recent addition of undeclared alarm
Eric Blake <eblake@redhat.com>
parents: 17249
diff changeset
174 #if HAVE_DECL_ALARM
4348
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
175 /* This test makes some buggy mktime implementations loop.
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
176 Give up after 60 seconds; a mktime slower than that
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
177 isn't worth using anyway. */
17355
9855b352e525 regex: port to mingw's recent addition of undeclared alarm
Eric Blake <eblake@redhat.com>
parents: 17249
diff changeset
178 signal (SIGALRM, SIG_DFL);
4348
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
179 alarm (60);
17355
9855b352e525 regex: port to mingw's recent addition of undeclared alarm
Eric Blake <eblake@redhat.com>
parents: 17249
diff changeset
180 #endif
4348
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
181
14245
21a50d7b2537 mktime: avoid infinite loop
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
182 time_t_max = (! time_t_signed
21a50d7b2537 mktime: avoid infinite loop
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
183 ? (time_t) -1
14249
52b55b447c02 TYPE_MAXIMUM: avoid theoretically undefined behavior
Paul Eggert <eggert@cs.ucla.edu>
parents: 14245
diff changeset
184 : ((((time_t) 1 << (sizeof (time_t) * CHAR_BIT - 2)) - 1)
52b55b447c02 TYPE_MAXIMUM: avoid theoretically undefined behavior
Paul Eggert <eggert@cs.ucla.edu>
parents: 14245
diff changeset
185 * 2 + 1));
14245
21a50d7b2537 mktime: avoid infinite loop
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
186 time_t_min = (! time_t_signed
21a50d7b2537 mktime: avoid infinite loop
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
187 ? (time_t) 0
21a50d7b2537 mktime: avoid infinite loop
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
188 : time_t_signed_magnitude
21a50d7b2537 mktime: avoid infinite loop
Eric Blake <eblake@redhat.com>
parents: 14079
diff changeset
189 ? ~ (time_t) 0
14249
52b55b447c02 TYPE_MAXIMUM: avoid theoretically undefined behavior
Paul Eggert <eggert@cs.ucla.edu>
parents: 14245
diff changeset
190 : ~ time_t_max);
7734
6cc7c62f16f7 * m4/mktime.m4 (AC_FUNC_MKTIME): Sync from Autoconf.
Paul Eggert <eggert@cs.ucla.edu>
parents: 7276
diff changeset
191
4348
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
192 delta = time_t_max / 997; /* a suitable prime number */
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
193 for (i = 0; i < N_STRINGS; i++)
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
194 {
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
195 if (tz_strings[i])
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11744
diff changeset
196 putenv (tz_strings[i]);
4348
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
197
16923
0bce099a6479 mktime: fix integer overflow in 'configure'-time test
Paul Eggert <eggert@cs.ucla.edu>
parents: 16201
diff changeset
198 for (t = 0; t <= time_t_max - delta && (result & 1) == 0; t += delta)
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 11744
diff changeset
199 if (! mktime_test (t))
13918
d5a74c6ec06b Put more information about failed tests into the test return codes.
Bruno Haible <bruno@clisp.org>
parents: 13695
diff changeset
200 result |= 1;
16923
0bce099a6479 mktime: fix integer overflow in 'configure'-time test
Paul Eggert <eggert@cs.ucla.edu>
parents: 16201
diff changeset
201 if ((result & 2) == 0
0bce099a6479 mktime: fix integer overflow in 'configure'-time test
Paul Eggert <eggert@cs.ucla.edu>
parents: 16201
diff changeset
202 && ! (mktime_test ((time_t) 1)
0bce099a6479 mktime: fix integer overflow in 'configure'-time test
Paul Eggert <eggert@cs.ucla.edu>
parents: 16201
diff changeset
203 && mktime_test ((time_t) (60 * 60))
0bce099a6479 mktime: fix integer overflow in 'configure'-time test
Paul Eggert <eggert@cs.ucla.edu>
parents: 16201
diff changeset
204 && mktime_test ((time_t) (60 * 60 * 24))))
13918
d5a74c6ec06b Put more information about failed tests into the test return codes.
Bruno Haible <bruno@clisp.org>
parents: 13695
diff changeset
205 result |= 2;
4348
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
206
16923
0bce099a6479 mktime: fix integer overflow in 'configure'-time test
Paul Eggert <eggert@cs.ucla.edu>
parents: 16201
diff changeset
207 for (j = 1; (result & 4) == 0; j <<= 1)
0bce099a6479 mktime: fix integer overflow in 'configure'-time test
Paul Eggert <eggert@cs.ucla.edu>
parents: 16201
diff changeset
208 {
0bce099a6479 mktime: fix integer overflow in 'configure'-time test
Paul Eggert <eggert@cs.ucla.edu>
parents: 16201
diff changeset
209 if (! bigtime_test (j))
0bce099a6479 mktime: fix integer overflow in 'configure'-time test
Paul Eggert <eggert@cs.ucla.edu>
parents: 16201
diff changeset
210 result |= 4;
0bce099a6479 mktime: fix integer overflow in 'configure'-time test
Paul Eggert <eggert@cs.ucla.edu>
parents: 16201
diff changeset
211 if (INT_MAX / 2 < j)
0bce099a6479 mktime: fix integer overflow in 'configure'-time test
Paul Eggert <eggert@cs.ucla.edu>
parents: 16201
diff changeset
212 break;
0bce099a6479 mktime: fix integer overflow in 'configure'-time test
Paul Eggert <eggert@cs.ucla.edu>
parents: 16201
diff changeset
213 }
0bce099a6479 mktime: fix integer overflow in 'configure'-time test
Paul Eggert <eggert@cs.ucla.edu>
parents: 16201
diff changeset
214 if ((result & 8) == 0 && ! bigtime_test (INT_MAX))
13918
d5a74c6ec06b Put more information about failed tests into the test return codes.
Bruno Haible <bruno@clisp.org>
parents: 13695
diff changeset
215 result |= 8;
4348
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
216 }
13918
d5a74c6ec06b Put more information about failed tests into the test return codes.
Bruno Haible <bruno@clisp.org>
parents: 13695
diff changeset
217 if (! irix_6_4_bug ())
d5a74c6ec06b Put more information about failed tests into the test return codes.
Bruno Haible <bruno@clisp.org>
parents: 13695
diff changeset
218 result |= 16;
d5a74c6ec06b Put more information about failed tests into the test return codes.
Bruno Haible <bruno@clisp.org>
parents: 13695
diff changeset
219 if (! spring_forward_gap ())
d5a74c6ec06b Put more information about failed tests into the test return codes.
Bruno Haible <bruno@clisp.org>
parents: 13695
diff changeset
220 result |= 32;
d5a74c6ec06b Put more information about failed tests into the test return codes.
Bruno Haible <bruno@clisp.org>
parents: 13695
diff changeset
221 if (! year_2050_test ())
d5a74c6ec06b Put more information about failed tests into the test return codes.
Bruno Haible <bruno@clisp.org>
parents: 13695
diff changeset
222 result |= 64;
d5a74c6ec06b Put more information about failed tests into the test return codes.
Bruno Haible <bruno@clisp.org>
parents: 13695
diff changeset
223 return result;
4348
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
224 }]])],
15053
d8eeaab555f5 mktime: Respect rules for use of AC_LIBOBJ.
Bruno Haible <bruno@clisp.org>
parents: 14796
diff changeset
225 [gl_cv_func_working_mktime=yes],
d8eeaab555f5 mktime: Respect rules for use of AC_LIBOBJ.
Bruno Haible <bruno@clisp.org>
parents: 14796
diff changeset
226 [gl_cv_func_working_mktime=no],
d8eeaab555f5 mktime: Respect rules for use of AC_LIBOBJ.
Bruno Haible <bruno@clisp.org>
parents: 14796
diff changeset
227 [gl_cv_func_working_mktime=no])
d8eeaab555f5 mktime: Respect rules for use of AC_LIBOBJ.
Bruno Haible <bruno@clisp.org>
parents: 14796
diff changeset
228 ])
4348
fc8667232bcc Ensure we use gnulib mktime rather than glibc's mktime, on hosts
Paul Eggert <eggert@cs.ucla.edu>
parents: 4107
diff changeset
229
15053
d8eeaab555f5 mktime: Respect rules for use of AC_LIBOBJ.
Bruno Haible <bruno@clisp.org>
parents: 14796
diff changeset
230 if test $gl_cv_func_working_mktime = no; then
11742
531d4547f010 Fix compilation error when <ctime> is used and mktime is replaced.
Bruno Haible <bruno@clisp.org>
parents: 11068
diff changeset
231 REPLACE_MKTIME=1
11744
6fff409b3230 mktime: correct setting of REPLACE_MKTIME
Jim Meyering <meyering@redhat.com>
parents: 11742
diff changeset
232 else
6fff409b3230 mktime: correct setting of REPLACE_MKTIME
Jim Meyering <meyering@redhat.com>
parents: 11742
diff changeset
233 REPLACE_MKTIME=0
4107
7c1a6b73f48e An autoconf macro for its associated module.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
234 fi
7c1a6b73f48e An autoconf macro for its associated module.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
235 ])
7c1a6b73f48e An autoconf macro for its associated module.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
236
14796
5fcbe73883bf New module 'mktime-internal'.
Bruno Haible <bruno@clisp.org>
parents: 14249
diff changeset
237 AC_DEFUN([gl_FUNC_MKTIME_INTERNAL], [
5fcbe73883bf New module 'mktime-internal'.
Bruno Haible <bruno@clisp.org>
parents: 14249
diff changeset
238 AC_REQUIRE([gl_FUNC_MKTIME])
5fcbe73883bf New module 'mktime-internal'.
Bruno Haible <bruno@clisp.org>
parents: 14249
diff changeset
239 if test $REPLACE_MKTIME = 0; then
5fcbe73883bf New module 'mktime-internal'.
Bruno Haible <bruno@clisp.org>
parents: 14249
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240 dnl BeOS has __mktime_internal in libc, but other platforms don't.
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Bruno Haible <bruno@clisp.org>
parents: 14249
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241 AC_CHECK_FUNC([__mktime_internal],
5fcbe73883bf New module 'mktime-internal'.
Bruno Haible <bruno@clisp.org>
parents: 14249
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242 [AC_DEFINE([mktime_internal], [__mktime_internal],
5fcbe73883bf New module 'mktime-internal'.
Bruno Haible <bruno@clisp.org>
parents: 14249
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243 [Define to the real name of the mktime_internal function.])
5fcbe73883bf New module 'mktime-internal'.
Bruno Haible <bruno@clisp.org>
parents: 14249
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244 ],
5fcbe73883bf New module 'mktime-internal'.
Bruno Haible <bruno@clisp.org>
parents: 14249
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245 [dnl mktime works but it doesn't export __mktime_internal,
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Bruno Haible <bruno@clisp.org>
parents: 14249
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246 dnl so we need to substitute our own mktime implementation.
5fcbe73883bf New module 'mktime-internal'.
Bruno Haible <bruno@clisp.org>
parents: 14249
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247 REPLACE_MKTIME=1
5fcbe73883bf New module 'mktime-internal'.
Bruno Haible <bruno@clisp.org>
parents: 14249
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248 ])
5fcbe73883bf New module 'mktime-internal'.
Bruno Haible <bruno@clisp.org>
parents: 14249
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249 fi
5fcbe73883bf New module 'mktime-internal'.
Bruno Haible <bruno@clisp.org>
parents: 14249
diff changeset
250 ])
5fcbe73883bf New module 'mktime-internal'.
Bruno Haible <bruno@clisp.org>
parents: 14249
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251
4107
7c1a6b73f48e An autoconf macro for its associated module.
Bruno Haible <bruno@clisp.org>
parents:
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252 # Prerequisites of lib/mktime.c.
17049
eaa24b775e15 mktime: avoid 'static inline'
Paul Eggert <eggert@cs.ucla.edu>
parents: 16935
diff changeset
253 AC_DEFUN([gl_PREREQ_MKTIME], [:])