configure.ac - vzctl - Rivoreo Source Code Repositories

 #  Copyright (C) 2000-2013, Parallels, Inc. All rights reserved.
 #
 #  This program is free software; you can redistribute it and/or modify
 #  it under the terms of the GNU General Public License as published by
 #  the Free Software Foundation; either version 2 of the License, or
 #  (at your option) any later version.
 #
 #  This program is distributed in the hope that it will be useful,
 #  but WITHOUT ANY WARRANTY; without even the implied warranty of
 #  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 #  GNU General Public License for more details.
 #
 #  You should have received a copy of the GNU General Public License
 #  along with this program; if not, write to the Free Software
 #  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 #

 # Generic configuration
 AC_PREREQ(2.59)
 AC_INIT(vzctl, 4.11.1, devel@openvz.org)
 AC_CONFIG_SRCDIR([src/vzctl.c])

 # Change sysconfdir default since otherwise some important files
 # (an initscript, files for logrotate, and udev) will be installed
 # to some nonsence/non-working place like under /usr/local/etc/
 #
 # NOTE: this changes expected configure behavior: if you specify --prefix
 #        it will not change sysconfdir, instead now one have to specify
 #        --sysconfdir explicitly. To make it more clear we print
 #        current sysconfdir value at the end of configure run.
 #
 # FIXME: dirty hack, may not work with some autoconf versions.
 test $sysconfdir = '${prefix}/etc' && sysconfdir=/etc

 # Similar problem with localstatedir, which should be /var not /usr/var
 # See https://bugzilla.openvz.org/show_bug.cgi?id=2637#c2
 test $localstatedir = '${prefix}/var' && localstatedir=/var

 AC_CANONICAL_BUILD
 AC_CANONICAL_HOST
 AC_CANONICAL_TARGET

 # If we are on an x86_64, redefine libdir from default value
 if test "$target_cpu" = "x86_64" -a "$libdir" = '${exec_prefix}/lib'; then
 	if debarch=$(dpkg-architecture -qDEB_HOST_MULTIARCH 2>/dev/null); then
 		# Debian/Ubuntu
 		libdir='${exec_prefix}/'$debarch
 	else
 		# Assume Red Hat/SUSE: libs go to lib64
 		libdir='${exec_prefix}/lib64'
 	fi
 fi

 # Automake
 AM_INIT_AUTOMAKE([1.9 foreign dist-bzip2])

 # Enable silent build rules by default, requires at least
 # Automake-1.11. Disable by either passing --disable-silent-rules to
 # configure or passing V=1 to make
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

 # Disable build of static libraries by default.
 AC_DISABLE_STATIC

 # If AC_USE_SYSTEM_EXTENSIONS is available (autoconf >= 2.60),
 # use it. Otherwise, use old AC_GNU_SOURCE
 m4_ifdef([AC_USE_SYSTEM_EXTENSIONS],
 	 [AC_USE_SYSTEM_EXTENSIONS], [AC_GNU_SOURCE])

 # Checks for programs.
 AC_PROG_CC
 AC_PROG_LIBTOOL
 AC_PROG_INSTALL
 AC_PROG_LN_S
 AC_PROG_MAKE_SET

 # Compiler settings
 CFLAGS="${CFLAGS} -Wall -Wpointer-arith -Wcast-qual -Wextra"
 CFLAGS="${CFLAGS} -Wcast-align -Wno-unused-parameter"
 CFLAGS="${CFLAGS} -Wno-missing-field-initializers"
 CFLAGS="${CFLAGS} -D_FILE_OFFSET_BITS=64"

 # We need -m64 for ppc64 in order to get proper ioctls
 if test x$target_cpu = xppc64 -o x$target_cpu = xpowerpc64; then
 	CFLAGS="${CFLAGS} -m64"
 fi

 # Checks for libraries.
 AC_CHECK_LIB(dl, dlopen,
 	DL_LIBS="-ldl", AC_MSG_ERROR([libdl not found]),)

 AC_SUBST(DL_LIBS)

 AC_CHECK_LIB(util, openpty,
 	UTIL_LIBS="-lutil", AC_MSG_ERROR([libutil not found]),)

 AC_SUBST(UTIL_LIBS)

 AC_CHECK_LIB(m, rint,
 	MATH_LIBS="-lm", AC_MSG_ERROR([libm not found]),)

 AC_SUBST(MATH_LIBS)

 # Checks for header files.
 AC_CHECK_HEADERS([arpa/inet.h fcntl.h limits.h netdb.h netinet/in.h \
 	sys/file.h sys/ioctl.h sys/mount.h sys/param.h sys/socket.h \
 	sys/vfs.h termios.h],,
 	AC_MSG_ERROR([some needed header(s) not found]))
 #AC_HEADER_MAJOR

 # Checks for typedefs, structures, and compiler characteristics.
 AC_C_INLINE
 AC_CHECK_MEMBERS([struct stat.st_rdev],,
 	AC_MSG_ERROR([no st_rdev member in struct stat]))
 AC_TYPE_SIZE_T
 AC_TYPE_UID_T
 m4_ifdef([AC_TYPE_UINT16_T], [AC_TYPE_UINT16_T])
 m4_ifdef([AC_TYPE_UINT32_T], [AC_TYPE_UINT32_T])
 m4_ifdef([AC_TYPE_UINT8_T], [AC_TYPE_UINT8_T])

 # Checks for library functions.
 AC_FUNC_ALLOCA
 AC_FUNC_FORK
 AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK
 AC_FUNC_MALLOC
 AC_FUNC_REALLOC
 AC_FUNC_STRNLEN
 AC_CHECK_FUNCS([alarm bzero dup2 endgrent endpwent memset mkdir mkfifo \
 	realpath rmdir select socket strcasecmp strchr strdup strerror \
 	strrchr strstr strtol strtoul strtoull uname],,
 	AC_MSG_ERROR([some needed function(s) not found]))

 AC_CHECK_DECLS([strndupa])

 AC_ARG_ENABLE([bashcomp],
               [AS_HELP_STRING([--enable-bashcomp],
                               [Enable bashcompletion support])],
               [case "${enableval}" in
                 yes) enable_bashcomp="+bashcomp";;
                 no)  enable_bashcomp="-bashcomp";;
                 *)   AC_MSG_ERROR(bad value ${enableval} for --enable-bashcomp);;
               esac],
               [enable_bashcomp="-bashcomp"])
 AM_CONDITIONAL(ENABLE_BASHCOMP, test "x$enable_bashcomp" = "x+bashcomp")

 AC_ARG_ENABLE([logrotate],
               [AS_HELP_STRING([--enable-logrotate],
                               [Enable logrotate support])],
               [case "${enableval}" in
                 yes) enable_logrotate="+logrotate";;
                 no)  enable_logrotate="-logrotate";;
                 *)   AC_MSG_ERROR(bad value ${enableval} for --enable-logrotate);;
               esac],
               [enable_logrotate="-logrotate"])
 AM_CONDITIONAL(ENABLE_LOGROTATE, test "x$enable_logrotate" = "x+logrotate")

 AC_ARG_ENABLE([udev],
               [AS_HELP_STRING([--disable-udev],
                               [Disable udev support])],
               [case "${enableval}" in
                 yes) enable_udev="+udev";;
                 no)  enable_udev="-udev";;
                 *)   AC_MSG_ERROR(bad value ${enableval} for --enable-udev);;
               esac],
               [enable_udev="+udev"])
 AM_CONDITIONAL(ENABLE_UDEV, test "x$enable_udev" = "x+udev")

 AC_ARG_WITH([ploop],
             [AS_HELP_STRING([--with-ploop],
                             [Enable support for ploop])],
             [case "${withval}" in
               yes) with_ploop="+ploop";;
               no)  with_ploop="-ploop";;
               *)   AC_MSG_ERROR(bad value ${withval} for --with-ploop);;
             esac],
             [with_ploop="+ploop"])

 AS_IF([test "x$with_ploop" = "x+ploop"],
 	[ AC_CHECK_HEADER(ploop/dynload.h, ,
 		[ AC_MSG_ERROR( [
 The ploop library headers not found or way too old. You need to either
 install recent ploop library headers (most probably ploop-devel package),
 or use ./configure --without-ploop] ) ]
 	)
 	AC_CHECK_MEMBER([struct ploop_mount_param.fsck], ,
 		[ AC_MSG_ERROR( [
 The ploop library headers are too old. You need ploop 1.8 or later] ) ],
 		[[#include "ploop/libploop.h"]])
 	AC_CHECK_DECL(SYSEXIT_NOSNAP, ,
 		[ AC_MSG_ERROR( [
 The ploop library headers are too old. You need ploop 1.13 or later] ) ],
 		[[#include "ploop/libploop.h"]])

 	]
 )

 AS_IF([test "x$with_ploop" = "x+ploop"],
 	[ AM_PATH_XML2(2.6.16, ,
 		AC_MSG_ERROR([Please install libxml2 devel package]))
 	  AC_DEFINE(HAVE_PLOOP, [1], [Define to enable ploop support]) ])
 AM_CONDITIONAL(HAVE_PLOOP, [test "x$with_ploop" = "x+ploop"])

 AC_ARG_WITH([cgroup],
             [AS_HELP_STRING([--with-cgroup],
                             [Enable support for cgroup and upstream kernel])],
             [case "${withval}" in
               yes) with_cgroup="+cgroup";;
               no)  with_cgroup="-cgroup";;
               *)   AC_MSG_ERROR(bad value ${withval} for --with-cgroup);;
             esac],
             [with_cgroup="+cgroup"])

 AS_IF([test "x$with_cgroup" = "x+cgroup"],
         [ PKG_CHECK_MODULES(CGROUP, [libcgroup >= 0.37])
           AC_DEFINE(HAVE_UPSTREAM, [1], [Define to enable upstream kernel support])
           AC_CHECK_FUNCS([setns]) ]
 )
 AM_CONDITIONAL(HAVE_CGROUP, [test "x$with_cgroup" = "x+cgroup"])
 AC_SUBST(CGROUP_LIBS)
 AC_SUBST(CGROUP_CFLAGS)


 AC_ARG_WITH([vz],
             [AS_HELP_STRING([--with-vz],
                             [Enable support for OpenVZ kernel])],
             [case "${withval}" in
               yes) with_vz="+vz";;
               no)  with_vz="-vz";;
               *)   AC_MSG_ERROR(bad value ${withval} for --with-vz);;
             esac],
             [with_vz="+vz"])


 AS_IF([test "x$with_vz" = "x+vz"],
 # vzsyscalls.h will encode the knowledge of which syscalls are supported in
 # which archs, and determine whether or not the VZ_KERNEL is usable. During
 # normal operation, this file in enclosed within VZ_KERNEL_SUPPORTED, so as
 # to get it out of the way during compilation. To check for it, we manually
 # define the constant in the test program
 [AC_MSG_CHECKING([if current architecture supported by OpenVZ])
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
 	[#define VZ_KERNEL_SUPPORTED
 	#include "${srcdir}/include/vzsyscalls.h"]])
 	],
 	[AC_DEFINE(VZ_KERNEL_SUPPORTED)
 	 AM_CONDITIONAL(HAVE_VZ_KERNEL, true)
 	 AC_MSG_RESULT([yes])
 	],
 	[AM_CONDITIONAL(HAVE_VZ_KERNEL, false)
 	 with_vz="-vz"
 	AC_MSG_RESULT([no])]
 )],
 [AM_CONDITIONAL(HAVE_VZ_KERNEL, false)]
 )

 # A way to redefine /vz is ./configure vzdir=/some/dir
 AS_IF([test "x$vzdir" = "x"], vzdir=/vz)
 AC_ARG_VAR(vzdir, [Common prefix for a few OpenVZ-related directories,
 		   including VE_ROOT and VE_PRIVATE (default: /vz)])

 # Final info page
 AC_CONFIG_COMMANDS_PRE([SUMMARY="$PACKAGE_STRING configured successfully:

            CC: $CC ($($CC --version | head -n1))
        CFLAGS: '$CFLAGS'
         build: $build
          host: $host
        target: $target
        prefix: $prefix
    sysconfdir: $sysconfdir
 localstatedir: $localstatedir
        libdir: $libdir
         vzdir: $vzdir
      features: $enable_bashcomp $enable_logrotate $enable_udev $with_ploop $with_cgroup $with_vz
 "])

 AS_IF([test "x$with_vz" = "x-vz" -a "x$with_cgroup" = "x-cgroup"],
 [AC_ERROR("At least one of cgroup or vz must be enabled")]
 )

 # Output
 AC_CONFIG_FILES([bin/Makefile
                  etc/bash_completion.d/Makefile
                  etc/conf/Makefile
                  etc/dists/Makefile
                  etc/init.d/Makefile
                  etc/logrotate.d/Makefile
                  etc/network/if-up.d/Makefile
                  etc/network-scripts/Makefile
                  etc/udev/Makefile
                  etc/Makefile
                  include/version.h
                  man/Makefile
                  scripts/Makefile
                  src/lib/Makefile
                  src/Makefile
                  Makefile])
 AC_OUTPUT

 AC_MSG_NOTICE([$SUMMARY])
	# Copyright (C) 2000-2013, Parallels, Inc. All rights reserved.
	#
	# This program is free software; you can redistribute it and/or modify
	# it under the terms of the GNU General Public License as published by
	# the Free Software Foundation; either version 2 of the License, or
	# (at your option) any later version.
	#
	# This program is distributed in the hope that it will be useful,
	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	# GNU General Public License for more details.
	#
	# You should have received a copy of the GNU General Public License
	# along with this program; if not, write to the Free Software
	# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	#

	# Generic configuration
	AC_PREREQ(2.59)
	AC_INIT(vzctl, 4.11.1, devel@openvz.org)
	AC_CONFIG_SRCDIR([src/vzctl.c])

	# Change sysconfdir default since otherwise some important files
	# (an initscript, files for logrotate, and udev) will be installed
	# to some nonsence/non-working place like under /usr/local/etc/
	#
	# NOTE: this changes expected configure behavior: if you specify --prefix
	# it will not change sysconfdir, instead now one have to specify
	# --sysconfdir explicitly. To make it more clear we print
	# current sysconfdir value at the end of configure run.
	#
	# FIXME: dirty hack, may not work with some autoconf versions.
	test $sysconfdir = '${prefix}/etc' && sysconfdir=/etc

	# Similar problem with localstatedir, which should be /var not /usr/var
	# See https://bugzilla.openvz.org/show_bug.cgi?id=2637#c2
	test $localstatedir = '${prefix}/var' && localstatedir=/var

	AC_CANONICAL_BUILD
	AC_CANONICAL_HOST
	AC_CANONICAL_TARGET

	# If we are on an x86_64, redefine libdir from default value
	if test "$target_cpu" = "x86_64" -a "$libdir" = '${exec_prefix}/lib'; then
	if debarch=$(dpkg-architecture -qDEB_HOST_MULTIARCH 2>/dev/null); then
	# Debian/Ubuntu
	libdir='${exec_prefix}/'$debarch
	else
	# Assume Red Hat/SUSE: libs go to lib64
	libdir='${exec_prefix}/lib64'
	fi
	fi

	# Automake
	AM_INIT_AUTOMAKE([1.9 foreign dist-bzip2])

	# Enable silent build rules by default, requires at least
	# Automake-1.11. Disable by either passing --disable-silent-rules to
	# configure or passing V=1 to make
	m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

	# Disable build of static libraries by default.
	AC_DISABLE_STATIC

	# If AC_USE_SYSTEM_EXTENSIONS is available (autoconf >= 2.60),
	# use it. Otherwise, use old AC_GNU_SOURCE
	m4_ifdef([AC_USE_SYSTEM_EXTENSIONS],
	[AC_USE_SYSTEM_EXTENSIONS], [AC_GNU_SOURCE])

	# Checks for programs.
	AC_PROG_CC
	AC_PROG_LIBTOOL
	AC_PROG_INSTALL
	AC_PROG_LN_S
	AC_PROG_MAKE_SET

	# Compiler settings
	CFLAGS="${CFLAGS} -Wall -Wpointer-arith -Wcast-qual -Wextra"
	CFLAGS="${CFLAGS} -Wcast-align -Wno-unused-parameter"
	CFLAGS="${CFLAGS} -Wno-missing-field-initializers"
	CFLAGS="${CFLAGS} -D_FILE_OFFSET_BITS=64"

	# We need -m64 for ppc64 in order to get proper ioctls
	if test x$target_cpu = xppc64 -o x$target_cpu = xpowerpc64; then
	CFLAGS="${CFLAGS} -m64"
	fi

	# Checks for libraries.
	AC_CHECK_LIB(dl, dlopen,
	DL_LIBS="-ldl", AC_MSG_ERROR([libdl not found]),)

	AC_SUBST(DL_LIBS)

	AC_CHECK_LIB(util, openpty,
	UTIL_LIBS="-lutil", AC_MSG_ERROR([libutil not found]),)

	AC_SUBST(UTIL_LIBS)

	AC_CHECK_LIB(m, rint,
	MATH_LIBS="-lm", AC_MSG_ERROR([libm not found]),)

	AC_SUBST(MATH_LIBS)

	# Checks for header files.
	AC_CHECK_HEADERS([arpa/inet.h fcntl.h limits.h netdb.h netinet/in.h \
	sys/file.h sys/ioctl.h sys/mount.h sys/param.h sys/socket.h \
	sys/vfs.h termios.h],,
	AC_MSG_ERROR([some needed header(s) not found]))
	#AC_HEADER_MAJOR

	# Checks for typedefs, structures, and compiler characteristics.
	AC_C_INLINE
	AC_CHECK_MEMBERS([struct stat.st_rdev],,
	AC_MSG_ERROR([no st_rdev member in struct stat]))
	AC_TYPE_SIZE_T
	AC_TYPE_UID_T
	m4_ifdef([AC_TYPE_UINT16_T], [AC_TYPE_UINT16_T])
	m4_ifdef([AC_TYPE_UINT32_T], [AC_TYPE_UINT32_T])
	m4_ifdef([AC_TYPE_UINT8_T], [AC_TYPE_UINT8_T])

	# Checks for library functions.
	AC_FUNC_ALLOCA
	AC_FUNC_FORK
	AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK
	AC_FUNC_MALLOC
	AC_FUNC_REALLOC
	AC_FUNC_STRNLEN
	AC_CHECK_FUNCS([alarm bzero dup2 endgrent endpwent memset mkdir mkfifo \
	realpath rmdir select socket strcasecmp strchr strdup strerror \
	strrchr strstr strtol strtoul strtoull uname],,
	AC_MSG_ERROR([some needed function(s) not found]))

	AC_CHECK_DECLS([strndupa])

	AC_ARG_ENABLE([bashcomp],
	[AS_HELP_STRING([--enable-bashcomp],
	[Enable bashcompletion support])],
	[case "${enableval}" in
	yes) enable_bashcomp="+bashcomp";;
	no) enable_bashcomp="-bashcomp";;
	*) AC_MSG_ERROR(bad value ${enableval} for --enable-bashcomp);;
	esac],
	[enable_bashcomp="-bashcomp"])
	AM_CONDITIONAL(ENABLE_BASHCOMP, test "x$enable_bashcomp" = "x+bashcomp")

	AC_ARG_ENABLE([logrotate],
	[AS_HELP_STRING([--enable-logrotate],
	[Enable logrotate support])],
	[case "${enableval}" in
	yes) enable_logrotate="+logrotate";;
	no) enable_logrotate="-logrotate";;
	*) AC_MSG_ERROR(bad value ${enableval} for --enable-logrotate);;
	esac],
	[enable_logrotate="-logrotate"])
	AM_CONDITIONAL(ENABLE_LOGROTATE, test "x$enable_logrotate" = "x+logrotate")

	AC_ARG_ENABLE([udev],
	[AS_HELP_STRING([--disable-udev],
	[Disable udev support])],
	[case "${enableval}" in
	yes) enable_udev="+udev";;
	no) enable_udev="-udev";;
	*) AC_MSG_ERROR(bad value ${enableval} for --enable-udev);;
	esac],
	[enable_udev="+udev"])
	AM_CONDITIONAL(ENABLE_UDEV, test "x$enable_udev" = "x+udev")

	AC_ARG_WITH([ploop],
	[AS_HELP_STRING([--with-ploop],
	[Enable support for ploop])],
	[case "${withval}" in
	yes) with_ploop="+ploop";;
	no) with_ploop="-ploop";;
	*) AC_MSG_ERROR(bad value ${withval} for --with-ploop);;
	esac],
	[with_ploop="+ploop"])

	AS_IF([test "x$with_ploop" = "x+ploop"],
	[ AC_CHECK_HEADER(ploop/dynload.h, ,
	[ AC_MSG_ERROR( [
	The ploop library headers not found or way too old. You need to either
	install recent ploop library headers (most probably ploop-devel package),
	or use ./configure --without-ploop] ) ]
	)
	AC_CHECK_MEMBER([struct ploop_mount_param.fsck], ,
	[ AC_MSG_ERROR( [
	The ploop library headers are too old. You need ploop 1.8 or later] ) ],
	[[#include "ploop/libploop.h"]])
	AC_CHECK_DECL(SYSEXIT_NOSNAP, ,
	[ AC_MSG_ERROR( [
	The ploop library headers are too old. You need ploop 1.13 or later] ) ],
	[[#include "ploop/libploop.h"]])

	]
	)

	AS_IF([test "x$with_ploop" = "x+ploop"],
	[ AM_PATH_XML2(2.6.16, ,
	AC_MSG_ERROR([Please install libxml2 devel package]))
	AC_DEFINE(HAVE_PLOOP, [1], [Define to enable ploop support]) ])
	AM_CONDITIONAL(HAVE_PLOOP, [test "x$with_ploop" = "x+ploop"])

	AC_ARG_WITH([cgroup],
	[AS_HELP_STRING([--with-cgroup],
	[Enable support for cgroup and upstream kernel])],
	[case "${withval}" in
	yes) with_cgroup="+cgroup";;
	no) with_cgroup="-cgroup";;
	*) AC_MSG_ERROR(bad value ${withval} for --with-cgroup);;
	esac],
	[with_cgroup="+cgroup"])

	AS_IF([test "x$with_cgroup" = "x+cgroup"],
	[ PKG_CHECK_MODULES(CGROUP, [libcgroup >= 0.37])
	AC_DEFINE(HAVE_UPSTREAM, [1], [Define to enable upstream kernel support])
	AC_CHECK_FUNCS([setns]) ]
	)
	AM_CONDITIONAL(HAVE_CGROUP, [test "x$with_cgroup" = "x+cgroup"])
	AC_SUBST(CGROUP_LIBS)
	AC_SUBST(CGROUP_CFLAGS)


	AC_ARG_WITH([vz],
	[AS_HELP_STRING([--with-vz],
	[Enable support for OpenVZ kernel])],
	[case "${withval}" in
	yes) with_vz="+vz";;
	no) with_vz="-vz";;
	*) AC_MSG_ERROR(bad value ${withval} for --with-vz);;
	esac],
	[with_vz="+vz"])


	AS_IF([test "x$with_vz" = "x+vz"],
	# vzsyscalls.h will encode the knowledge of which syscalls are supported in
	# which archs, and determine whether or not the VZ_KERNEL is usable. During
	# normal operation, this file in enclosed within VZ_KERNEL_SUPPORTED, so as
	# to get it out of the way during compilation. To check for it, we manually
	# define the constant in the test program
	[AC_MSG_CHECKING([if current architecture supported by OpenVZ])
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
	[#define VZ_KERNEL_SUPPORTED
	#include "${srcdir}/include/vzsyscalls.h"]])
	],
	[AC_DEFINE(VZ_KERNEL_SUPPORTED)
	AM_CONDITIONAL(HAVE_VZ_KERNEL, true)
	AC_MSG_RESULT([yes])
	],
	[AM_CONDITIONAL(HAVE_VZ_KERNEL, false)
	with_vz="-vz"
	AC_MSG_RESULT([no])]
	)],
	[AM_CONDITIONAL(HAVE_VZ_KERNEL, false)]
	)

	# A way to redefine /vz is ./configure vzdir=/some/dir
	AS_IF([test "x$vzdir" = "x"], vzdir=/vz)
	AC_ARG_VAR(vzdir, [Common prefix for a few OpenVZ-related directories,
	including VE_ROOT and VE_PRIVATE (default: /vz)])

	# Final info page
	AC_CONFIG_COMMANDS_PRE([SUMMARY="$PACKAGE_STRING configured successfully:

	CC: $CC ($($CC --version \| head -n1))
	CFLAGS: '$CFLAGS'
	build: $build
	host: $host
	target: $target
	prefix: $prefix
	sysconfdir: $sysconfdir
	localstatedir: $localstatedir
	libdir: $libdir
	vzdir: $vzdir
	features: $enable_bashcomp $enable_logrotate $enable_udev $with_ploop $with_cgroup $with_vz
	"])

	AS_IF([test "x$with_vz" = "x-vz" -a "x$with_cgroup" = "x-cgroup"],
	[AC_ERROR("At least one of cgroup or vz must be enabled")]
	)

	# Output
	AC_CONFIG_FILES([bin/Makefile
	etc/bash_completion.d/Makefile
	etc/conf/Makefile
	etc/dists/Makefile
	etc/init.d/Makefile
	etc/logrotate.d/Makefile
	etc/network/if-up.d/Makefile
	etc/network-scripts/Makefile
	etc/udev/Makefile
	etc/Makefile
	include/version.h
	man/Makefile
	scripts/Makefile
	src/lib/Makefile
	src/Makefile
	Makefile])
	AC_OUTPUT

	AC_MSG_NOTICE([$SUMMARY])