| 1 | # Configure a more-standard replacement for <time.h>. |
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| 2 | |
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| 3 | # Copyright (C) 2000, 2001, 2003, 2004, 2005, 2006, 2007 Free Software |
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| 4 | # Foundation, Inc. |
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| 5 | |
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| 6 | # This file is free software; the Free Software Foundation |
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| 7 | # gives unlimited permission to copy and/or distribute it, |
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| 8 | # with or without modifications, as long as this notice is preserved. |
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| 9 | |
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| 10 | # Written by Paul Eggert and Jim Meyering. |
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| 11 | |
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| 12 | AC_DEFUN([gl_HEADER_TIME_H], |
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| 13 | [ |
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| 14 | dnl Use AC_REQUIRE here, so that the default behavior below is expanded |
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| 15 | dnl once only, before all statements that occur in other macros. |
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| 16 | AC_REQUIRE([gl_HEADER_TIME_H_BODY]) |
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| 17 | ]) |
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| 18 | |
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| 19 | AC_DEFUN([gl_HEADER_TIME_H_BODY], |
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| 20 | [ |
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| 21 | AC_REQUIRE([AC_C_RESTRICT]) |
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| 22 | AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS]) |
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| 23 | gl_CHECK_NEXT_HEADERS([time.h]) |
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| 24 | AC_REQUIRE([gl_CHECK_TYPE_STRUCT_TIMESPEC]) |
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| 25 | ]) |
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| 26 | |
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| 27 | AC_DEFUN([gl_HEADER_TIME_H_DEFAULTS], |
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| 28 | [ |
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| 29 | dnl If another module says to replace or to not replace, do that. |
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| 30 | dnl Otherwise, replace only if someone compiles with -DGNULIB_PORTCHECK; |
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| 31 | dnl this lets maintainers check for portability. |
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| 32 | REPLACE_LOCALTIME_R=GNULIB_PORTCHECK; AC_SUBST([REPLACE_LOCALTIME_R]) |
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| 33 | REPLACE_MKTIME=GNULIB_PORTCHECK; AC_SUBST([REPLACE_MKTIME]) |
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| 34 | REPLACE_NANOSLEEP=GNULIB_PORTCHECK; AC_SUBST([REPLACE_NANOSLEEP]) |
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| 35 | REPLACE_STRPTIME=GNULIB_PORTCHECK; AC_SUBST([REPLACE_STRPTIME]) |
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| 36 | REPLACE_TIMEGM=GNULIB_PORTCHECK; AC_SUBST([REPLACE_TIMEGM]) |
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| 37 | ]) |
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| 38 | |
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| 39 | dnl Define HAVE_STRUCT_TIMESPEC if `struct timespec' is declared |
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| 40 | dnl in time.h or sys/time.h. |
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| 41 | |
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| 42 | AC_DEFUN([gl_CHECK_TYPE_STRUCT_TIMESPEC], |
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| 43 | [ |
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| 44 | AC_CHECK_HEADERS_ONCE([sys/time.h]) |
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| 45 | AC_CACHE_CHECK([for struct timespec in <time.h>], |
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| 46 | [gl_cv_sys_struct_timespec_in_time_h], |
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| 47 | [AC_COMPILE_IFELSE( |
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| 48 | [AC_LANG_PROGRAM( |
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| 49 | [[#include <time.h> |
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| 50 | ]], |
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| 51 | [[static struct timespec x; x.tv_sec = x.tv_nsec;]])], |
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| 52 | [gl_cv_sys_struct_timespec_in_time_h=yes], |
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| 53 | [gl_cv_sys_struct_timespec_in_time_h=no])]) |
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| 54 | |
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| 55 | TIME_H_DEFINES_STRUCT_TIMESPEC=0 |
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| 56 | SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=0 |
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| 57 | if test $gl_cv_sys_struct_timespec_in_time_h = yes; then |
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| 58 | TIME_H_DEFINES_STRUCT_TIMESPEC=1 |
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| 59 | else |
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| 60 | AC_CACHE_CHECK([for struct timespec in <sys/time.h>], |
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| 61 | [gl_cv_sys_struct_timespec_in_sys_time_h], |
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| 62 | [AC_COMPILE_IFELSE( |
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| 63 | [AC_LANG_PROGRAM( |
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| 64 | [[#include <sys/time.h> |
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| 65 | ]], |
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| 66 | [[static struct timespec x; x.tv_sec = x.tv_nsec;]])], |
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| 67 | [gl_cv_sys_struct_timespec_in_sys_time_h=yes], |
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| 68 | [gl_cv_sys_struct_timespec_in_sys_time_h=no])]) |
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| 69 | if test $gl_cv_sys_struct_timespec_in_sys_time_h = yes; then |
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| 70 | SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=1 |
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| 71 | fi |
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| 72 | fi |
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| 73 | AC_SUBST([TIME_H_DEFINES_STRUCT_TIMESPEC]) |
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| 74 | AC_SUBST([SYS_TIME_H_DEFINES_STRUCT_TIMESPEC]) |
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| 75 | ]) |
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