1 # Configure a more-standard replacement for <time.h>.
3 # Copyright (C) 2000-2001, 2003-2007, 2009-2019 Free Software
8 # This file is free software; the Free Software Foundation
9 # gives unlimited permission to copy and/or distribute it,
10 # with or without modifications, as long as this notice is preserved.
12 # Written by Paul Eggert and Jim Meyering.
14 AC_DEFUN([gl_HEADER_TIME_H],
16 dnl Use AC_REQUIRE here, so that the default behavior below is expanded
17 dnl once only, before all statements that occur in other macros.
18 AC_REQUIRE([gl_HEADER_TIME_H_BODY])
21 AC_DEFUN([gl_HEADER_TIME_H_BODY],
23 AC_REQUIRE([AC_C_RESTRICT])
24 AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
25 gl_NEXT_HEADERS([time.h])
26 AC_REQUIRE([gl_CHECK_TYPE_STRUCT_TIMESPEC])
29 dnl Check whether 'struct timespec' is declared
30 dnl in time.h, sys/time.h, pthread.h, or unistd.h.
32 AC_DEFUN([gl_CHECK_TYPE_STRUCT_TIMESPEC],
34 AC_CHECK_HEADERS_ONCE([sys/time.h])
35 AC_CACHE_CHECK([for struct timespec in <time.h>],
36 [gl_cv_sys_struct_timespec_in_time_h],
41 [[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
42 [gl_cv_sys_struct_timespec_in_time_h=yes],
43 [gl_cv_sys_struct_timespec_in_time_h=no])])
45 TIME_H_DEFINES_STRUCT_TIMESPEC=0
46 SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=0
47 PTHREAD_H_DEFINES_STRUCT_TIMESPEC=0
48 UNISTD_H_DEFINES_STRUCT_TIMESPEC=0
49 if test $gl_cv_sys_struct_timespec_in_time_h = yes; then
50 TIME_H_DEFINES_STRUCT_TIMESPEC=1
52 AC_CACHE_CHECK([for struct timespec in <sys/time.h>],
53 [gl_cv_sys_struct_timespec_in_sys_time_h],
56 [[#include <sys/time.h>
58 [[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
59 [gl_cv_sys_struct_timespec_in_sys_time_h=yes],
60 [gl_cv_sys_struct_timespec_in_sys_time_h=no])])
61 if test $gl_cv_sys_struct_timespec_in_sys_time_h = yes; then
62 SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=1
64 AC_CACHE_CHECK([for struct timespec in <pthread.h>],
65 [gl_cv_sys_struct_timespec_in_pthread_h],
68 [[#include <pthread.h>
70 [[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
71 [gl_cv_sys_struct_timespec_in_pthread_h=yes],
72 [gl_cv_sys_struct_timespec_in_pthread_h=no])])
73 if test $gl_cv_sys_struct_timespec_in_pthread_h = yes; then
74 PTHREAD_H_DEFINES_STRUCT_TIMESPEC=1
76 AC_CACHE_CHECK([for struct timespec in <unistd.h>],
77 [gl_cv_sys_struct_timespec_in_unistd_h],
82 [[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
83 [gl_cv_sys_struct_timespec_in_unistd_h=yes],
84 [gl_cv_sys_struct_timespec_in_unistd_h=no])])
85 if test $gl_cv_sys_struct_timespec_in_unistd_h = yes; then
86 UNISTD_H_DEFINES_STRUCT_TIMESPEC=1
91 AC_SUBST([TIME_H_DEFINES_STRUCT_TIMESPEC])
92 AC_SUBST([SYS_TIME_H_DEFINES_STRUCT_TIMESPEC])
93 AC_SUBST([PTHREAD_H_DEFINES_STRUCT_TIMESPEC])
94 AC_SUBST([UNISTD_H_DEFINES_STRUCT_TIMESPEC])
97 AC_DEFUN([gl_TIME_MODULE_INDICATOR],
99 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
100 AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
101 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
102 dnl Define it also as a C macro, for the benefit of the unit tests.
103 gl_MODULE_INDICATOR_FOR_TESTS([$1])
106 AC_DEFUN([gl_HEADER_TIME_H_DEFAULTS],
108 GNULIB_CTIME=0; AC_SUBST([GNULIB_CTIME])
109 GNULIB_MKTIME=0; AC_SUBST([GNULIB_MKTIME])
110 GNULIB_LOCALTIME=0; AC_SUBST([GNULIB_LOCALTIME])
111 GNULIB_NANOSLEEP=0; AC_SUBST([GNULIB_NANOSLEEP])
112 GNULIB_STRFTIME=0; AC_SUBST([GNULIB_STRFTIME])
113 GNULIB_STRPTIME=0; AC_SUBST([GNULIB_STRPTIME])
114 GNULIB_TIMEGM=0; AC_SUBST([GNULIB_TIMEGM])
115 GNULIB_TIME_R=0; AC_SUBST([GNULIB_TIME_R])
116 GNULIB_TIME_RZ=0; AC_SUBST([GNULIB_TIME_RZ])
117 GNULIB_TZSET=0; AC_SUBST([GNULIB_TZSET])
118 dnl Assume proper GNU behavior unless another module says otherwise.
119 HAVE_DECL_LOCALTIME_R=1; AC_SUBST([HAVE_DECL_LOCALTIME_R])
120 HAVE_NANOSLEEP=1; AC_SUBST([HAVE_NANOSLEEP])
121 HAVE_STRPTIME=1; AC_SUBST([HAVE_STRPTIME])
122 HAVE_TIMEGM=1; AC_SUBST([HAVE_TIMEGM])
123 HAVE_TZSET=1; AC_SUBST([HAVE_TZSET])
124 dnl Even GNU libc does not have timezone_t yet.
125 HAVE_TIMEZONE_T=0; AC_SUBST([HAVE_TIMEZONE_T])
126 dnl If another module says to replace or to not replace, do that.
127 dnl Otherwise, replace only if someone compiles with -DGNULIB_PORTCHECK;
128 dnl this lets maintainers check for portability.
129 REPLACE_CTIME=GNULIB_PORTCHECK; AC_SUBST([REPLACE_CTIME])
130 REPLACE_LOCALTIME_R=GNULIB_PORTCHECK; AC_SUBST([REPLACE_LOCALTIME_R])
131 REPLACE_MKTIME=GNULIB_PORTCHECK; AC_SUBST([REPLACE_MKTIME])
132 REPLACE_NANOSLEEP=GNULIB_PORTCHECK; AC_SUBST([REPLACE_NANOSLEEP])
133 REPLACE_STRFTIME=GNULIB_PORTCHECK; AC_SUBST([REPLACE_STRFTIME])
134 REPLACE_TIMEGM=GNULIB_PORTCHECK; AC_SUBST([REPLACE_TIMEGM])
135 REPLACE_TZSET=GNULIB_PORTCHECK; AC_SUBST([REPLACE_TZSET])
137 dnl Hack so that the time module doesn't depend on the sys_time module.
138 dnl First, default GNULIB_GETTIMEOFDAY to 0 if sys_time is absent.
139 : ${GNULIB_GETTIMEOFDAY=0}; AC_SUBST([GNULIB_GETTIMEOFDAY])
140 dnl Second, it's OK to not use GNULIB_PORTCHECK for REPLACE_GMTIME
141 dnl and REPLACE_LOCALTIME, as portability to Solaris 2.6 and earlier
142 dnl is no longer a big deal.
143 REPLACE_GMTIME=0; AC_SUBST([REPLACE_GMTIME])
144 REPLACE_LOCALTIME=0; AC_SUBST([REPLACE_LOCALTIME])