1 # Configure a more-standard replacement for <time.h>.
3 # Copyright (C) 2000, 2001, 2003, 2004, 2005, 2006, 2007 Free Software
6 # This file is free software; the Free Software Foundation
7 # gives unlimited permission to copy and/or distribute it,
8 # with or without modifications, as long as this notice is preserved.
10 # Written by Paul Eggert and Jim Meyering.
12 AC_DEFUN([gl_HEADER_TIME_H],
14 dnl Use AC_REQUIRE here, so that the default behavior below is expanded
15 dnl once only, before all statements that occur in other macros.
16 AC_REQUIRE([gl_HEADER_TIME_H_BODY])
19 AC_DEFUN([gl_HEADER_TIME_H_BODY],
21 AC_REQUIRE([AC_C_RESTRICT])
22 AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
23 gl_CHECK_NEXT_HEADERS([time.h])
24 AC_REQUIRE([gl_CHECK_TYPE_STRUCT_TIMESPEC])
27 AC_DEFUN([gl_HEADER_TIME_H_DEFAULTS],
29 dnl If another module says to replace or to not replace, do that.
30 dnl Otherwise, replace only if someone compiles with -DGNULIB_PORTCHECK;
31 dnl this lets maintainers check for portability.
32 REPLACE_LOCALTIME_R=GNULIB_PORTCHECK; AC_SUBST([REPLACE_LOCALTIME_R])
33 REPLACE_NANOSLEEP=GNULIB_PORTCHECK; AC_SUBST([REPLACE_NANOSLEEP])
34 REPLACE_STRPTIME=GNULIB_PORTCHECK; AC_SUBST([REPLACE_STRPTIME])
35 REPLACE_TIMEGM=GNULIB_PORTCHECK; AC_SUBST([REPLACE_TIMEGM])
38 dnl Define HAVE_STRUCT_TIMESPEC if `struct timespec' is declared
39 dnl in time.h or sys/time.h.
41 AC_DEFUN([gl_CHECK_TYPE_STRUCT_TIMESPEC],
43 AC_CHECK_HEADERS_ONCE([sys/time.h])
44 AC_CACHE_CHECK([for struct timespec in <time.h>],
45 [gl_cv_sys_struct_timespec_in_time_h],
50 [[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
51 [gl_cv_sys_struct_timespec_in_time_h=yes],
52 [gl_cv_sys_struct_timespec_in_time_h=no])])
54 TIME_H_DEFINES_STRUCT_TIMESPEC=0
55 SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=0
56 if test $gl_cv_sys_struct_timespec_in_time_h = yes; then
57 TIME_H_DEFINES_STRUCT_TIMESPEC=1
59 AC_CACHE_CHECK([for struct timespec in <sys/time.h>],
60 [gl_cv_sys_struct_timespec_in_sys_time_h],
63 [[#include <sys/time.h>
65 [[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
66 [gl_cv_sys_struct_timespec_in_sys_time_h=yes],
67 [gl_cv_sys_struct_timespec_in_sys_time_h=no])])
68 if test $gl_cv_sys_struct_timespec_in_sys_time_h = yes; then
69 SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=1
72 AC_SUBST([TIME_H_DEFINES_STRUCT_TIMESPEC])
73 AC_SUBST([SYS_TIME_H_DEFINES_STRUCT_TIMESPEC])