1 # Configure a more-standard replacement for <time.h>.
3 # Copyright (C) 2000-2001, 2003-2007, 2009-2011 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])
27 dnl Ensure the type pid_t gets defined.
28 AC_REQUIRE([AC_TYPE_PID_T])
31 dnl Define HAVE_STRUCT_TIMESPEC if `struct timespec' is declared
32 dnl in time.h, sys/time.h, or pthread.h.
34 AC_DEFUN([gl_CHECK_TYPE_STRUCT_TIMESPEC],
36 AC_CHECK_HEADERS_ONCE([sys/time.h])
37 AC_CACHE_CHECK([for struct timespec in <time.h>],
38 [gl_cv_sys_struct_timespec_in_time_h],
43 [[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
44 [gl_cv_sys_struct_timespec_in_time_h=yes],
45 [gl_cv_sys_struct_timespec_in_time_h=no])])
47 TIME_H_DEFINES_STRUCT_TIMESPEC=0
48 SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=0
49 PTHREAD_H_DEFINES_STRUCT_TIMESPEC=0
50 if test $gl_cv_sys_struct_timespec_in_time_h = yes; then
51 TIME_H_DEFINES_STRUCT_TIMESPEC=1
53 AC_CACHE_CHECK([for struct timespec in <sys/time.h>],
54 [gl_cv_sys_struct_timespec_in_sys_time_h],
57 [[#include <sys/time.h>
59 [[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
60 [gl_cv_sys_struct_timespec_in_sys_time_h=yes],
61 [gl_cv_sys_struct_timespec_in_sys_time_h=no])])
62 if test $gl_cv_sys_struct_timespec_in_sys_time_h = yes; then
63 SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=1
65 AC_CACHE_CHECK([for struct timespec in <pthread.h>],
66 [gl_cv_sys_struct_timespec_in_pthread_h],
69 [[#include <pthread.h>
71 [[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
72 [gl_cv_sys_struct_timespec_in_pthread_h=yes],
73 [gl_cv_sys_struct_timespec_in_pthread_h=no])])
74 if test $gl_cv_sys_struct_timespec_in_pthread_h = yes; then
75 PTHREAD_H_DEFINES_STRUCT_TIMESPEC=1
79 AC_SUBST([TIME_H_DEFINES_STRUCT_TIMESPEC])
80 AC_SUBST([SYS_TIME_H_DEFINES_STRUCT_TIMESPEC])
81 AC_SUBST([PTHREAD_H_DEFINES_STRUCT_TIMESPEC])
84 AC_DEFUN([gl_TIME_MODULE_INDICATOR],
86 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
87 AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
88 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
89 dnl Define it also as a C macro, for the benefit of the unit tests.
90 gl_MODULE_INDICATOR_FOR_TESTS([$1])
93 AC_DEFUN([gl_HEADER_TIME_H_DEFAULTS],
95 GNULIB_MKTIME=0; AC_SUBST([GNULIB_MKTIME])
96 GNULIB_NANOSLEEP=0; AC_SUBST([GNULIB_NANOSLEEP])
97 GNULIB_STRPTIME=0; AC_SUBST([GNULIB_STRPTIME])
98 GNULIB_TIMEGM=0; AC_SUBST([GNULIB_TIMEGM])
99 GNULIB_TIME_R=0; AC_SUBST([GNULIB_TIME_R])
100 dnl Assume proper GNU behavior unless another module says otherwise.
101 HAVE_DECL_LOCALTIME_R=1; AC_SUBST([HAVE_DECL_LOCALTIME_R])
102 HAVE_NANOSLEEP=1; AC_SUBST([HAVE_NANOSLEEP])
103 HAVE_STRPTIME=1; AC_SUBST([HAVE_STRPTIME])
104 HAVE_TIMEGM=1; AC_SUBST([HAVE_TIMEGM])
105 dnl If another module says to replace or to not replace, do that.
106 dnl Otherwise, replace only if someone compiles with -DGNULIB_PORTCHECK;
107 dnl this lets maintainers check for portability.
108 REPLACE_LOCALTIME_R=GNULIB_PORTCHECK; AC_SUBST([REPLACE_LOCALTIME_R])
109 REPLACE_MKTIME=GNULIB_PORTCHECK; AC_SUBST([REPLACE_MKTIME])
110 REPLACE_NANOSLEEP=GNULIB_PORTCHECK; AC_SUBST([REPLACE_NANOSLEEP])
111 REPLACE_TIMEGM=GNULIB_PORTCHECK; AC_SUBST([REPLACE_TIMEGM])