mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-12-27 08:05:24 +00:00
102 lines
2.9 KiB
Plaintext
102 lines
2.9 KiB
Plaintext
# serial 12
|
|
|
|
# Copyright (C) 2001-2003, 2005, 2007, 2009 Free Software Foundation, Inc.
|
|
# 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.
|
|
|
|
dnl From Jim Meyering.
|
|
|
|
AC_DEFUN([gl_FUNC_GETTIMEOFDAY],
|
|
[
|
|
AC_REQUIRE([AC_C_RESTRICT])
|
|
AC_REQUIRE([gl_HEADER_SYS_TIME_H])
|
|
AC_CHECK_FUNCS_ONCE([gettimeofday])
|
|
|
|
AC_CACHE_CHECK([for gettimeofday with POSIX signature],
|
|
[gl_cv_func_gettimeofday_posix_signature],
|
|
[AC_COMPILE_IFELSE(
|
|
[AC_LANG_PROGRAM(
|
|
[[#include <sys/time.h>
|
|
struct timeval c;
|
|
]],
|
|
[[
|
|
int (*f) (struct timeval *restrict, void *restrict) = gettimeofday;
|
|
int x = f (&c, 0);
|
|
return !(x | c.tv_sec | c.tv_usec);
|
|
]])],
|
|
[gl_cv_func_gettimeofday_posix_signature=yes],
|
|
[gl_cv_func_gettimeofday_posix_signature=no])])
|
|
|
|
gl_FUNC_GETTIMEOFDAY_CLOBBER
|
|
|
|
if test $gl_cv_func_gettimeofday_posix_signature != yes; then
|
|
REPLACE_GETTIMEOFDAY=1
|
|
SYS_TIME_H=sys/time.h
|
|
if test $gl_cv_func_gettimeofday_clobber != yes; then
|
|
AC_LIBOBJ([gettimeofday])
|
|
gl_PREREQ_GETTIMEOFDAY
|
|
fi
|
|
fi
|
|
])
|
|
|
|
|
|
dnl See if gettimeofday clobbers the static buffer that localtime uses
|
|
dnl for its return value. The gettimeofday function from Mac OS X 10.0.4
|
|
dnl (i.e., Darwin 1.3.7) has this problem.
|
|
dnl
|
|
dnl If it does, then arrange to use gettimeofday and localtime only via
|
|
dnl the wrapper functions that work around the problem.
|
|
|
|
AC_DEFUN([gl_FUNC_GETTIMEOFDAY_CLOBBER],
|
|
[
|
|
AC_REQUIRE([gl_HEADER_SYS_TIME_H])
|
|
|
|
AC_CACHE_CHECK([whether gettimeofday clobbers localtime buffer],
|
|
[gl_cv_func_gettimeofday_clobber],
|
|
[AC_RUN_IFELSE(
|
|
[AC_LANG_PROGRAM(
|
|
[[#include <string.h>
|
|
#include <sys/time.h>
|
|
#include <time.h>
|
|
#include <stdlib.h>
|
|
]],
|
|
[[
|
|
time_t t = 0;
|
|
struct tm *lt;
|
|
struct tm saved_lt;
|
|
struct timeval tv;
|
|
lt = localtime (&t);
|
|
saved_lt = *lt;
|
|
gettimeofday (&tv, NULL);
|
|
return memcmp (lt, &saved_lt, sizeof (struct tm)) != 0;
|
|
]])],
|
|
[gl_cv_func_gettimeofday_clobber=no],
|
|
[gl_cv_func_gettimeofday_clobber=yes],
|
|
dnl When crosscompiling, assume it is broken.
|
|
[gl_cv_func_gettimeofday_clobber=yes])])
|
|
|
|
if test $gl_cv_func_gettimeofday_clobber = yes; then
|
|
REPLACE_GETTIMEOFDAY=1
|
|
SYS_TIME_H=sys/time.h
|
|
gl_GETTIMEOFDAY_REPLACE_LOCALTIME
|
|
AC_DEFINE([GETTIMEOFDAY_CLOBBERS_LOCALTIME], [1],
|
|
[Define if gettimeofday clobbers the localtime buffer.])
|
|
fi
|
|
])
|
|
|
|
AC_DEFUN([gl_GETTIMEOFDAY_REPLACE_LOCALTIME], [
|
|
AC_LIBOBJ([gettimeofday])
|
|
gl_PREREQ_GETTIMEOFDAY
|
|
AC_DEFINE([gmtime], [rpl_gmtime],
|
|
[Define to rpl_gmtime if the replacement function should be used.])
|
|
AC_DEFINE([localtime], [rpl_localtime],
|
|
[Define to rpl_localtime if the replacement function should be used.])
|
|
])
|
|
|
|
# Prerequisites of lib/gettimeofday.c.
|
|
AC_DEFUN([gl_PREREQ_GETTIMEOFDAY], [
|
|
AC_CHECK_HEADERS([sys/timeb.h])
|
|
AC_CHECK_FUNCS([_ftime])
|
|
])
|