1 # Configure a more-standard replacement for <time.h>.
3 # Copyright (C) 2000-2001, 2003-2007, 2009-2014 Free Software Foundation, Inc.
7 # This file is free software; the Free Software Foundation
8 # gives unlimited permission to copy and/or distribute it,
9 # with or without modifications, as long as this notice is preserved.
11 # Written by Paul Eggert and Jim Meyering.
13 AC_DEFUN([gl_HEADER_TIME_H],
15 dnl Use AC_REQUIRE here, so that the default behavior below is expanded
16 dnl once only, before all statements that occur in other macros.
17 AC_REQUIRE([gl_HEADER_TIME_H_BODY])
20 AC_DEFUN([gl_HEADER_TIME_H_BODY],
22 AC_REQUIRE([AC_C_RESTRICT])
23 AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
24 gl_NEXT_HEADERS([time.h])
25 AC_REQUIRE([gl_CHECK_TYPE_STRUCT_TIMESPEC])
28 dnl Check whether 'struct timespec' is declared
29 dnl in time.h, sys/time.h, or pthread.h.
31 AC_DEFUN([gl_CHECK_TYPE_STRUCT_TIMESPEC],
33 AC_CHECK_HEADERS_ONCE([sys/time.h])
34 AC_CACHE_CHECK([for struct timespec in <time.h>],
35 [gl_cv_sys_struct_timespec_in_time_h],
40 [[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
41 [gl_cv_sys_struct_timespec_in_time_h=yes],
42 [gl_cv_sys_struct_timespec_in_time_h=no])])
44 TIME_H_DEFINES_STRUCT_TIMESPEC=0
45 SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=0
46 PTHREAD_H_DEFINES_STRUCT_TIMESPEC=0
47 if test $gl_cv_sys_struct_timespec_in_time_h = yes; then
48 TIME_H_DEFINES_STRUCT_TIMESPEC=1
50 AC_CACHE_CHECK([for struct timespec in <sys/time.h>],
51 [gl_cv_sys_struct_timespec_in_sys_time_h],
54 [[#include <sys/time.h>
56 [[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
57 [gl_cv_sys_struct_timespec_in_sys_time_h=yes],
58 [gl_cv_sys_struct_timespec_in_sys_time_h=no])])
59 if test $gl_cv_sys_struct_timespec_in_sys_time_h = yes; then
60 SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=1
62 AC_CACHE_CHECK([for struct timespec in <pthread.h>],
63 [gl_cv_sys_struct_timespec_in_pthread_h],
66 [[#include <pthread.h>
68 [[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
69 [gl_cv_sys_struct_timespec_in_pthread_h=yes],
70 [gl_cv_sys_struct_timespec_in_pthread_h=no])])
71 if test $gl_cv_sys_struct_timespec_in_pthread_h = yes; then
72 PTHREAD_H_DEFINES_STRUCT_TIMESPEC=1
76 AC_SUBST([TIME_H_DEFINES_STRUCT_TIMESPEC])
77 AC_SUBST([SYS_TIME_H_DEFINES_STRUCT_TIMESPEC])
78 AC_SUBST([PTHREAD_H_DEFINES_STRUCT_TIMESPEC])
81 AC_DEFUN([gl_TIME_MODULE_INDICATOR],
83 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
84 AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
85 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
86 dnl Define it also as a C macro, for the benefit of the unit tests.
87 gl_MODULE_INDICATOR_FOR_TESTS([$1])
90 AC_DEFUN([gl_HEADER_TIME_H_DEFAULTS],
92 GNULIB_MKTIME=0; AC_SUBST([GNULIB_MKTIME])
93 GNULIB_NANOSLEEP=0; AC_SUBST([GNULIB_NANOSLEEP])
94 GNULIB_STRPTIME=0; AC_SUBST([GNULIB_STRPTIME])
95 GNULIB_TIMEGM=0; AC_SUBST([GNULIB_TIMEGM])
96 GNULIB_TIME_R=0; AC_SUBST([GNULIB_TIME_R])
97 dnl Assume proper GNU behavior unless another module says otherwise.
98 HAVE_DECL_LOCALTIME_R=1; AC_SUBST([HAVE_DECL_LOCALTIME_R])
99 HAVE_NANOSLEEP=1; AC_SUBST([HAVE_NANOSLEEP])
100 HAVE_STRPTIME=1; AC_SUBST([HAVE_STRPTIME])
101 HAVE_TIMEGM=1; AC_SUBST([HAVE_TIMEGM])
102 dnl If another module says to replace or to not replace, do that.
103 dnl Otherwise, replace only if someone compiles with -DGNULIB_PORTCHECK;
104 dnl this lets maintainers check for portability.
105 REPLACE_LOCALTIME_R=GNULIB_PORTCHECK; AC_SUBST([REPLACE_LOCALTIME_R])
106 REPLACE_MKTIME=GNULIB_PORTCHECK; AC_SUBST([REPLACE_MKTIME])
107 REPLACE_NANOSLEEP=GNULIB_PORTCHECK; AC_SUBST([REPLACE_NANOSLEEP])
108 REPLACE_TIMEGM=GNULIB_PORTCHECK; AC_SUBST([REPLACE_TIMEGM])
110 dnl Hack so that the time module doesn't depend on the sys_time module.
111 dnl First, default GNULIB_GETTIMEOFDAY to 0 if sys_time is absent.
112 : ${GNULIB_GETTIMEOFDAY=0}; AC_SUBST([GNULIB_GETTIMEOFDAY])
113 dnl Second, it's OK to not use GNULIB_PORTCHECK for REPLACE_GMTIME
114 dnl and REPLACE_LOCALTIME, as portability to Solaris 2.6 and earlier
115 dnl is no longer a big deal.
116 REPLACE_GMTIME=0; AC_SUBST([REPLACE_GMTIME])
117 REPLACE_LOCALTIME=0; AC_SUBST([REPLACE_LOCALTIME])