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1 office 1 # Configure a more-standard replacement for <time.h>.
2  
3 # Copyright (C) 2000-2001, 2003-2007, 2009-2011 Free Software Foundation, Inc.
4  
5 # serial 4
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  
13 AC_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  
20 AC_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  
28 dnl Define HAVE_STRUCT_TIMESPEC if `struct timespec' is declared
29 dnl in time.h, sys/time.h, or pthread.h.
30  
31 AC_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  
81 AC_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  
90 AC_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 ])