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e65fc94b LC |
1 | # Configure a more-standard replacement for <time.h>. |
2 | ||
3 | # Copyright (C) 2000, 2001, 2003, 2004, 2005, 2006, 2007 Free Software | |
4 | # Foundation, Inc. | |
5 | ||
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. | |
9 | ||
10 | # Written by Paul Eggert and Jim Meyering. | |
11 | ||
12 | AC_DEFUN([gl_HEADER_TIME_H], | |
13 | [ | |
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]) | |
17 | ]) | |
18 | ||
19 | AC_DEFUN([gl_HEADER_TIME_H_BODY], | |
20 | [ | |
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]) | |
25 | ]) | |
26 | ||
27 | AC_DEFUN([gl_HEADER_TIME_H_DEFAULTS], | |
28 | [ | |
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]) | |
36 | ]) | |
37 | ||
38 | dnl Define HAVE_STRUCT_TIMESPEC if `struct timespec' is declared | |
39 | dnl in time.h or sys/time.h. | |
40 | ||
41 | AC_DEFUN([gl_CHECK_TYPE_STRUCT_TIMESPEC], | |
42 | [ | |
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], | |
46 | [AC_COMPILE_IFELSE( | |
47 | [AC_LANG_PROGRAM( | |
48 | [[#include <time.h> | |
49 | ]], | |
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])]) | |
53 | ||
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 | |
58 | else | |
59 | AC_CACHE_CHECK([for struct timespec in <sys/time.h>], | |
60 | [gl_cv_sys_struct_timespec_in_sys_time_h], | |
61 | [AC_COMPILE_IFELSE( | |
62 | [AC_LANG_PROGRAM( | |
63 | [[#include <sys/time.h> | |
64 | ]], | |
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 | |
70 | fi | |
71 | fi | |
72 | AC_SUBST([TIME_H_DEFINES_STRUCT_TIMESPEC]) | |
73 | AC_SUBST([SYS_TIME_H_DEFINES_STRUCT_TIMESPEC]) | |
74 | ]) |