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# Configure a more-standard replacement for <time.h>.
# Copyright (C) 2000-2001, 2003-2007, 2009-2020 Free Software Foundation, Inc.
# serial 12
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
# Written by Paul Eggert and Jim Meyering.
AC_DEFUN([gl_HEADER_TIME_H],
[
dnl Use AC_REQUIRE here, so that the default behavior below is expanded
dnl once only, before all statements that occur in other macros.
AC_REQUIRE([gl_HEADER_TIME_H_BODY])
])
AC_DEFUN([gl_HEADER_TIME_H_BODY],
[
AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
gl_NEXT_HEADERS([time.h])
AC_REQUIRE([gl_CHECK_TYPE_STRUCT_TIMESPEC])
AC_REQUIRE([AC_C_RESTRICT])
])
dnl Check whether 'struct timespec' is declared
dnl in time.h, sys/time.h, pthread.h, or unistd.h.
AC_DEFUN([gl_CHECK_TYPE_STRUCT_TIMESPEC],
[
AC_CHECK_HEADERS_ONCE([sys/time.h])
AC_CACHE_CHECK([for struct timespec in <time.h>],
[gl_cv_sys_struct_timespec_in_time_h],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[#include <time.h>
]],
[[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
[gl_cv_sys_struct_timespec_in_time_h=yes],
[gl_cv_sys_struct_timespec_in_time_h=no])])
TIME_H_DEFINES_STRUCT_TIMESPEC=0
SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=0
PTHREAD_H_DEFINES_STRUCT_TIMESPEC=0
UNISTD_H_DEFINES_STRUCT_TIMESPEC=0
if test $gl_cv_sys_struct_timespec_in_time_h = yes; then
TIME_H_DEFINES_STRUCT_TIMESPEC=1
else
AC_CACHE_CHECK([for struct timespec in <sys/time.h>],
[gl_cv_sys_struct_timespec_in_sys_time_h],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[#include <sys/time.h>
]],
[[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
[gl_cv_sys_struct_timespec_in_sys_time_h=yes],
[gl_cv_sys_struct_timespec_in_sys_time_h=no])])
if test $gl_cv_sys_struct_timespec_in_sys_time_h = yes; then
SYS_TIME_H_DEFINES_STRUCT_TIMESPEC=1
else
AC_CACHE_CHECK([for struct timespec in <pthread.h>],
[gl_cv_sys_struct_timespec_in_pthread_h],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[#include <pthread.h>
]],
[[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
[gl_cv_sys_struct_timespec_in_pthread_h=yes],
[gl_cv_sys_struct_timespec_in_pthread_h=no])])
if test $gl_cv_sys_struct_timespec_in_pthread_h = yes; then
PTHREAD_H_DEFINES_STRUCT_TIMESPEC=1
else
AC_CACHE_CHECK([for struct timespec in <unistd.h>],
[gl_cv_sys_struct_timespec_in_unistd_h],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[#include <unistd.h>
]],
[[static struct timespec x; x.tv_sec = x.tv_nsec;]])],
[gl_cv_sys_struct_timespec_in_unistd_h=yes],
[gl_cv_sys_struct_timespec_in_unistd_h=no])])
if test $gl_cv_sys_struct_timespec_in_unistd_h = yes; then
UNISTD_H_DEFINES_STRUCT_TIMESPEC=1
fi
fi
fi
fi
AC_SUBST([TIME_H_DEFINES_STRUCT_TIMESPEC])
AC_SUBST([SYS_TIME_H_DEFINES_STRUCT_TIMESPEC])
AC_SUBST([PTHREAD_H_DEFINES_STRUCT_TIMESPEC])
AC_SUBST([UNISTD_H_DEFINES_STRUCT_TIMESPEC])
])
AC_DEFUN([gl_TIME_MODULE_INDICATOR],
[
dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
gl_MODULE_INDICATOR_SET_VARIABLE([$1])
dnl Define it also as a C macro, for the benefit of the unit tests.
gl_MODULE_INDICATOR_FOR_TESTS([$1])
])
AC_DEFUN([gl_HEADER_TIME_H_DEFAULTS],
[
GNULIB_CTIME=0; AC_SUBST([GNULIB_CTIME])
GNULIB_MKTIME=0; AC_SUBST([GNULIB_MKTIME])
GNULIB_LOCALTIME=0; AC_SUBST([GNULIB_LOCALTIME])
GNULIB_NANOSLEEP=0; AC_SUBST([GNULIB_NANOSLEEP])
GNULIB_STRFTIME=0; AC_SUBST([GNULIB_STRFTIME])
GNULIB_STRPTIME=0; AC_SUBST([GNULIB_STRPTIME])
GNULIB_TIMEGM=0; AC_SUBST([GNULIB_TIMEGM])
GNULIB_TIME_R=0; AC_SUBST([GNULIB_TIME_R])
GNULIB_TIME_RZ=0; AC_SUBST([GNULIB_TIME_RZ])
GNULIB_TZSET=0; AC_SUBST([GNULIB_TZSET])
dnl Assume proper GNU behavior unless another module says otherwise.
HAVE_DECL_LOCALTIME_R=1; AC_SUBST([HAVE_DECL_LOCALTIME_R])
HAVE_NANOSLEEP=1; AC_SUBST([HAVE_NANOSLEEP])
HAVE_STRPTIME=1; AC_SUBST([HAVE_STRPTIME])
HAVE_TIMEGM=1; AC_SUBST([HAVE_TIMEGM])
HAVE_TZSET=1; AC_SUBST([HAVE_TZSET])
dnl Even GNU libc does not have timezone_t yet.
HAVE_TIMEZONE_T=0; AC_SUBST([HAVE_TIMEZONE_T])
dnl If another module says to replace or to not replace, do that.
dnl Otherwise, replace only if someone compiles with -DGNULIB_PORTCHECK;
dnl this lets maintainers check for portability.
REPLACE_CTIME=GNULIB_PORTCHECK; AC_SUBST([REPLACE_CTIME])
REPLACE_LOCALTIME_R=GNULIB_PORTCHECK; AC_SUBST([REPLACE_LOCALTIME_R])
REPLACE_MKTIME=GNULIB_PORTCHECK; AC_SUBST([REPLACE_MKTIME])
REPLACE_NANOSLEEP=GNULIB_PORTCHECK; AC_SUBST([REPLACE_NANOSLEEP])
REPLACE_STRFTIME=GNULIB_PORTCHECK; AC_SUBST([REPLACE_STRFTIME])
REPLACE_TIMEGM=GNULIB_PORTCHECK; AC_SUBST([REPLACE_TIMEGM])
REPLACE_TZSET=GNULIB_PORTCHECK; AC_SUBST([REPLACE_TZSET])
dnl Hack so that the time module doesn't depend on the sys_time module.
dnl First, default GNULIB_GETTIMEOFDAY to 0 if sys_time is absent.
: ${GNULIB_GETTIMEOFDAY=0}; AC_SUBST([GNULIB_GETTIMEOFDAY])
dnl Second, it's OK to not use GNULIB_PORTCHECK for REPLACE_GMTIME
dnl and REPLACE_LOCALTIME, as portability to Solaris 2.6 and earlier
dnl is no longer a big deal.
REPLACE_GMTIME=0; AC_SUBST([REPLACE_GMTIME])
REPLACE_LOCALTIME=0; AC_SUBST([REPLACE_LOCALTIME])
])
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