1# Configure a more-standard replacement for <time.h>. 2 3# Copyright (C) 2000-2001, 2003-2007, 2009-2012 Free Software Foundation, Inc. 4 5# serial 7 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 13AC_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 20AC_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 28dnl Check whether 'struct timespec' is declared 29dnl in time.h, sys/time.h, or pthread.h. 30 31AC_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 81AC_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 90AC_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]) 110