1# Configure a more-standard replacement for <time.h>.
2
3# Copyright (C) 2000-2001, 2003-2007, 2009-2012 Free Software Foundation, Inc.
4
5# serial 7
6
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.
10
11# Written by Paul Eggert and Jim Meyering.
12
13AC_DEFUN([gl_HEADER_TIME_H],
14[
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])
18])
19
20AC_DEFUN([gl_HEADER_TIME_H_BODY],
21[
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])
26])
27
28dnl Check whether 'struct timespec' is declared
29dnl in time.h, sys/time.h, or pthread.h.
30
31AC_DEFUN([gl_CHECK_TYPE_STRUCT_TIMESPEC],
32[
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],
36    [AC_COMPILE_IFELSE(
37       [AC_LANG_PROGRAM(
38          [[#include <time.h>
39          ]],
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])])
43
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
49  else
50    AC_CACHE_CHECK([for struct timespec in <sys/time.h>],
51      [gl_cv_sys_struct_timespec_in_sys_time_h],
52      [AC_COMPILE_IFELSE(
53         [AC_LANG_PROGRAM(
54            [[#include <sys/time.h>
55            ]],
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
61    else
62      AC_CACHE_CHECK([for struct timespec in <pthread.h>],
63        [gl_cv_sys_struct_timespec_in_pthread_h],
64        [AC_COMPILE_IFELSE(
65           [AC_LANG_PROGRAM(
66              [[#include <pthread.h>
67              ]],
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
73      fi
74    fi
75  fi
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])
79])
80
81AC_DEFUN([gl_TIME_MODULE_INDICATOR],
82[
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])
88])
89
90AC_DEFUN([gl_HEADER_TIME_H_DEFAULTS],
91[
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])
109])
110