1# Configure a more-standard replacement for <time.h>. 2 3# Copyright (C) 2000-2001, 2003-2007, 2009-2019 Free Software Foundation, Inc. 4 5# serial 11 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, pthread.h, or unistd.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 UNISTD_H_DEFINES_STRUCT_TIMESPEC=0 48 if test $gl_cv_sys_struct_timespec_in_time_h = yes; then 49 TIME_H_DEFINES_STRUCT_TIMESPEC=1 50 else 51 AC_CACHE_CHECK([for struct timespec in <sys/time.h>], 52 [gl_cv_sys_struct_timespec_in_sys_time_h], 53 [AC_COMPILE_IFELSE( 54 [AC_LANG_PROGRAM( 55 [[#include <sys/time.h> 56 ]], 57 [[static struct timespec x; x.tv_sec = x.tv_nsec;]])], 58 [gl_cv_sys_struct_timespec_in_sys_time_h=yes], 59 [gl_cv_sys_struct_timespec_in_sys_time_h=no])]) 60 if test $gl_cv_sys_struct_timespec_in_sys_time_h = yes; then 61 SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=1 62 else 63 AC_CACHE_CHECK([for struct timespec in <pthread.h>], 64 [gl_cv_sys_struct_timespec_in_pthread_h], 65 [AC_COMPILE_IFELSE( 66 [AC_LANG_PROGRAM( 67 [[#include <pthread.h> 68 ]], 69 [[static struct timespec x; x.tv_sec = x.tv_nsec;]])], 70 [gl_cv_sys_struct_timespec_in_pthread_h=yes], 71 [gl_cv_sys_struct_timespec_in_pthread_h=no])]) 72 if test $gl_cv_sys_struct_timespec_in_pthread_h = yes; then 73 PTHREAD_H_DEFINES_STRUCT_TIMESPEC=1 74 else 75 AC_CACHE_CHECK([for struct timespec in <unistd.h>], 76 [gl_cv_sys_struct_timespec_in_unistd_h], 77 [AC_COMPILE_IFELSE( 78 [AC_LANG_PROGRAM( 79 [[#include <unistd.h> 80 ]], 81 [[static struct timespec x; x.tv_sec = x.tv_nsec;]])], 82 [gl_cv_sys_struct_timespec_in_unistd_h=yes], 83 [gl_cv_sys_struct_timespec_in_unistd_h=no])]) 84 if test $gl_cv_sys_struct_timespec_in_unistd_h = yes; then 85 UNISTD_H_DEFINES_STRUCT_TIMESPEC=1 86 fi 87 fi 88 fi 89 fi 90 AC_SUBST([TIME_H_DEFINES_STRUCT_TIMESPEC]) 91 AC_SUBST([SYS_TIME_H_DEFINES_STRUCT_TIMESPEC]) 92 AC_SUBST([PTHREAD_H_DEFINES_STRUCT_TIMESPEC]) 93 AC_SUBST([UNISTD_H_DEFINES_STRUCT_TIMESPEC]) 94]) 95 96AC_DEFUN([gl_TIME_MODULE_INDICATOR], 97[ 98 dnl Use AC_REQUIRE here, so that the default settings are expanded once only. 99 AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS]) 100 gl_MODULE_INDICATOR_SET_VARIABLE([$1]) 101 dnl Define it also as a C macro, for the benefit of the unit tests. 102 gl_MODULE_INDICATOR_FOR_TESTS([$1]) 103]) 104 105AC_DEFUN([gl_HEADER_TIME_H_DEFAULTS], 106[ 107 GNULIB_CTIME=0; AC_SUBST([GNULIB_CTIME]) 108 GNULIB_MKTIME=0; AC_SUBST([GNULIB_MKTIME]) 109 GNULIB_LOCALTIME=0; AC_SUBST([GNULIB_LOCALTIME]) 110 GNULIB_NANOSLEEP=0; AC_SUBST([GNULIB_NANOSLEEP]) 111 GNULIB_STRFTIME=0; AC_SUBST([GNULIB_STRFTIME]) 112 GNULIB_STRPTIME=0; AC_SUBST([GNULIB_STRPTIME]) 113 GNULIB_TIMEGM=0; AC_SUBST([GNULIB_TIMEGM]) 114 GNULIB_TIME_R=0; AC_SUBST([GNULIB_TIME_R]) 115 GNULIB_TIME_RZ=0; AC_SUBST([GNULIB_TIME_RZ]) 116 GNULIB_TZSET=0; AC_SUBST([GNULIB_TZSET]) 117 dnl Assume proper GNU behavior unless another module says otherwise. 118 HAVE_DECL_LOCALTIME_R=1; AC_SUBST([HAVE_DECL_LOCALTIME_R]) 119 HAVE_NANOSLEEP=1; AC_SUBST([HAVE_NANOSLEEP]) 120 HAVE_STRPTIME=1; AC_SUBST([HAVE_STRPTIME]) 121 HAVE_TIMEGM=1; AC_SUBST([HAVE_TIMEGM]) 122 HAVE_TZSET=1; AC_SUBST([HAVE_TZSET]) 123 dnl Even GNU libc does not have timezone_t yet. 124 HAVE_TIMEZONE_T=0; AC_SUBST([HAVE_TIMEZONE_T]) 125 dnl If another module says to replace or to not replace, do that. 126 dnl Otherwise, replace only if someone compiles with -DGNULIB_PORTCHECK; 127 dnl this lets maintainers check for portability. 128 REPLACE_CTIME=GNULIB_PORTCHECK; AC_SUBST([REPLACE_CTIME]) 129 REPLACE_LOCALTIME_R=GNULIB_PORTCHECK; AC_SUBST([REPLACE_LOCALTIME_R]) 130 REPLACE_MKTIME=GNULIB_PORTCHECK; AC_SUBST([REPLACE_MKTIME]) 131 REPLACE_NANOSLEEP=GNULIB_PORTCHECK; AC_SUBST([REPLACE_NANOSLEEP]) 132 REPLACE_STRFTIME=GNULIB_PORTCHECK; AC_SUBST([REPLACE_STRFTIME]) 133 REPLACE_TIMEGM=GNULIB_PORTCHECK; AC_SUBST([REPLACE_TIMEGM]) 134 REPLACE_TZSET=GNULIB_PORTCHECK; AC_SUBST([REPLACE_TZSET]) 135 136 dnl Hack so that the time module doesn't depend on the sys_time module. 137 dnl First, default GNULIB_GETTIMEOFDAY to 0 if sys_time is absent. 138 : ${GNULIB_GETTIMEOFDAY=0}; AC_SUBST([GNULIB_GETTIMEOFDAY]) 139 dnl Second, it's OK to not use GNULIB_PORTCHECK for REPLACE_GMTIME 140 dnl and REPLACE_LOCALTIME, as portability to Solaris 2.6 and earlier 141 dnl is no longer a big deal. 142 REPLACE_GMTIME=0; AC_SUBST([REPLACE_GMTIME]) 143 REPLACE_LOCALTIME=0; AC_SUBST([REPLACE_LOCALTIME]) 144]) 145