lvm2/configure.in

###############################################################################
## Copyright (C) 2000-2004 Sistina Software, Inc. All rights reserved.
## Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved.
##
## This copyrighted material is made available to anyone wishing to use,
## modify, copy, or redistribute it subject to the terms and conditions
## of the GNU General Public License v.2.
##
## 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
################################################################################

AC_PREREQ(2.61)
################################################################################
dnl -- Process this file with autoconf to produce a configure script.
AC_INIT
AC_CONFIG_SRCDIR([lib/device/dev-cache.h])
AC_CONFIG_HEADERS([lib/misc/configure.h])

################################################################################
dnl -- Setup the directory where autoconf has auxilary files
AC_CONFIG_AUX_DIR(autoconf)

################################################################################
dnl -- Get system type
AC_CANONICAL_TARGET([])

case "$host_os" in
	linux*)
		CFLAGS="$CFLAGS"
		COPTIMISE_FLAG="-O2"
		CLDFLAGS="$CLDFLAGS -Wl,--version-script,.export.sym"
		CLDWHOLEARCHIVE="-Wl,-whole-archive"
		CLDNOWHOLEARCHIVE="-Wl,-no-whole-archive"
		LDDEPS="$LDDEPS .export.sym"
		LDFLAGS="$LDFLAGS -Wl,--export-dynamic"
		LIB_SUFFIX=so
		DEVMAPPER=yes
		ODIRECT=yes
		DM_IOCTLS=yes
		SELINUX=yes
		CLUSTER=internal
		FSADM=yes
		;;
	darwin*)
		CFLAGS="$CFLAGS -no-cpp-precomp -fno-common"
		COPTIMISE_FLAG="-O2"
		CLDFLAGS="$CLDFLAGS"
		CLDWHOLEARCHIVE="-all_load"
		CLDNOWHOLEARCHIVE=
		LIB_SUFFIX=dylib
		DEVMAPPER=yes
		ODIRECT=no
		DM_IOCTLS=no
		SELINUX=no
		CLUSTER=none
		FSADM=no
		;;
esac

################################################################################
dnl -- Checks for programs.
AC_PROG_SED
AC_PROG_AWK
AC_PROG_CC

dnl probably no longer needed in 2008, but...
AC_PROG_GCC_TRADITIONAL
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_MAKE_SET
AC_PROG_MKDIR_P
AC_PROG_RANLIB
AC_PATH_PROG(CFLOW_CMD, cflow)
AC_PATH_PROG(CSCOPE_CMD, cscope)

################################################################################
dnl -- Check for header files.
AC_HEADER_DIRENT
AC_HEADER_STDC
AC_HEADER_SYS_WAIT
AC_HEADER_TIME

AC_CHECK_HEADERS([locale.h stddef.h syslog.h sys/file.h sys/time.h assert.h \
  libgen.h signal.h sys/mman.h sys/resource.h sys/utsname.h sys/wait.h time.h], ,
  [AC_MSG_ERROR(bailing out)])

case "$host_os" in
	linux*)
		AC_CHECK_HEADERS(asm/byteorder.h linux/fs.h malloc.h,,AC_MSG_ERROR(bailing out)) ;;
	darwin*)
		AC_CHECK_HEADERS(machine/endian.h sys/disk.h,,AC_MSG_ERROR(bailing out)) ;;
esac

AC_CHECK_HEADERS([ctype.h dirent.h errno.h fcntl.h getopt.h inttypes.h limits.h \
  stdarg.h stdio.h stdlib.h string.h sys/ioctl.h sys/param.h sys/stat.h \
  sys/types.h unistd.h], , [AC_MSG_ERROR(bailing out)])
AC_CHECK_HEADERS(termios.h sys/statvfs.h)

################################################################################
dnl -- Check for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_C_INLINE
AC_CHECK_MEMBERS([struct stat.st_rdev])
AC_TYPE_OFF_T
AC_TYPE_PID_T
AC_TYPE_SIGNAL
AC_TYPE_SIZE_T
AC_TYPE_MODE_T
AC_CHECK_MEMBERS([struct stat.st_rdev])
AC_STRUCT_TM

################################################################################
dnl -- Check for functions
AC_CHECK_FUNCS([gethostname getpagesize memset mkdir rmdir munmap setlocale \
  strcasecmp strchr strdup strncasecmp strerror strrchr strstr strtol strtoul \
  uname], , [AC_MSG_ERROR(bailing out)])
AC_CHECK_FUNCS(siginterrupt)
AC_FUNC_ALLOCA
AC_FUNC_CLOSEDIR_VOID
AC_FUNC_FORK
AC_FUNC_LSTAT
AC_FUNC_MALLOC
AC_FUNC_MEMCMP
AC_FUNC_MMAP
AC_FUNC_STAT
AC_FUNC_STRTOD
AC_FUNC_VPRINTF

################################################################################
dnl -- Enables statically-linked tools
AC_MSG_CHECKING(whether to use static linking)
AC_ARG_ENABLE(static_link,
  [  --enable-static_link    Use this to link the tools to their libraries
                          statically.  Default is dynamic linking],
  STATIC_LINK=$enableval, STATIC_LINK=no)
AC_MSG_RESULT($STATIC_LINK)

################################################################################
dnl -- Prefix is /usr by default, the exec_prefix default is setup later
AC_PREFIX_DEFAULT(/usr)

################################################################################
dnl -- Setup the ownership of the files
AC_MSG_CHECKING(file owner)
AC_ARG_WITH(user,
  [  --with-user=USER        Set the owner of installed files [[USER=]] ],
  [ OWNER="$withval" ])
AC_MSG_RESULT($OWNER)

if test x$OWNER != x; then
	INSTALL="$INSTALL -o $OWNER"
fi

################################################################################
dnl -- Setup the group ownership of the files
AC_MSG_CHECKING(group owner)
AC_ARG_WITH(group,
  [  --with-group=GROUP      Set the group owner of installed files [[GROUP=]] ],
  [ GROUP="$withval" ])
AC_MSG_RESULT($GROUP)

if test x$GROUP != x; then
	INSTALL="$INSTALL -g $GROUP"
fi

################################################################################
dnl -- Setup device node ownership
AC_MSG_CHECKING(device node uid)

AC_ARG_WITH(device-uid,
  [  --with-device-uid=UID   Set the owner used for new device nodes [[UID=0]] ],
  [ DM_DEVICE_UID="$withval" ], [ DM_DEVICE_UID="0" ] )
AC_MSG_RESULT($DM_DEVICE_UID)

################################################################################
dnl -- Setup device group ownership
AC_MSG_CHECKING(device node gid)

AC_ARG_WITH(device-gid,
  [  --with-device-gid=UID   Set the group used for new device nodes [[GID=0]] ],
  [ DM_DEVICE_GID="$withval" ], [ DM_DEVICE_GID="0" ] )
AC_MSG_RESULT($DM_DEVICE_GID)

################################################################################
dnl -- Setup device mode
AC_MSG_CHECKING(device node mode)

AC_ARG_WITH(device-mode,
  [  --with-device-mode=MODE Set the mode used for new device nodes [[MODE=0600]] ],
  [ DM_DEVICE_MODE="$withval" ], [ DM_DEVICE_MODE="0600" ] )
AC_MSG_RESULT($DM_DEVICE_MODE)

################################################################################
dnl -- LVM1 tool fallback option
AC_MSG_CHECKING(whether to enable lvm1 fallback)
AC_ARG_ENABLE(lvm1_fallback, [  --enable-lvm1_fallback  Use this to fall back and use LVM1 binaries if
                          device-mapper is missing from the kernel],  LVM1_FALLBACK=$enableval, LVM1_FALLBACK=no)
AC_MSG_RESULT($LVM1_FALLBACK)

if test x$LVM1_FALLBACK = xyes; then
	AC_DEFINE([LVM1_FALLBACK], 1, [Define to 1 if 'lvm' should fall back to using LVM1 binaries if device-mapper is missing from the kernel])
fi

################################################################################
dnl -- format1 inclusion type
AC_MSG_CHECKING(whether to include support for lvm1 metadata)
AC_ARG_WITH(lvm1,
  [  --with-lvm1=TYPE        LVM1 metadata support: internal/shared/none
                          [TYPE=internal] ],
  [ LVM1="$withval" ],
  [ LVM1="internal" ])
AC_MSG_RESULT($LVM1)

if [[ "x$LVM1" != xnone -a "x$LVM1" != xinternal -a "x$LVM1" != xshared ]];
 then  AC_MSG_ERROR(
--with-lvm1 parameter invalid
)
fi;

if test x$LVM1 = xinternal; then
	AC_DEFINE([LVM1_INTERNAL], 1, [Define to 1 to include built-in support for LVM1 metadata.])
fi

################################################################################
dnl -- format_pool inclusion type
AC_MSG_CHECKING(whether to include support for GFS pool metadata)
AC_ARG_WITH(pool,
  [  --with-pool=TYPE        GFS pool read-only support: internal/shared/none
                          [TYPE=internal] ],
  [ POOL="$withval" ],
  [ POOL="internal" ])
AC_MSG_RESULT($POOL)

if [[ "x$POOL" != xnone -a "x$POOL" != xinternal -a "x$POOL" != xshared ]];
 then  AC_MSG_ERROR(
--with-pool parameter invalid
)
fi;

if test x$POOL = xinternal; then
	AC_DEFINE([POOL_INTERNAL], 1, [Define to 1 to include built-in support for GFS pool metadata.])
fi

################################################################################
dnl -- cluster_locking inclusion type
AC_MSG_CHECKING(whether to include support for cluster locking)
AC_ARG_WITH(cluster,
  [  --with-cluster=TYPE     Cluster LVM locking support: internal/shared/none
                          [TYPE=internal] ],
  [ CLUSTER="$withval" ])
AC_MSG_RESULT($CLUSTER)

if [[ "x$CLUSTER" != xnone -a "x$CLUSTER" != xinternal -a "x$CLUSTER" != xshared ]];
 then  AC_MSG_ERROR(
--with-cluster parameter invalid
)
fi;

if test x$CLUSTER = xinternal; then
	AC_DEFINE([CLUSTER_LOCKING_INTERNAL], 1, [Define to 1 to include built-in support for clustered LVM locking.])
fi

################################################################################
dnl -- snapshots inclusion type
AC_MSG_CHECKING(whether to include snapshots)
AC_ARG_WITH(snapshots,
  [  --with-snapshots=TYPE   Snapshot support: internal/shared/none
                          [TYPE=internal] ],
  [ SNAPSHOTS="$withval" ],
  [ SNAPSHOTS="internal" ])
AC_MSG_RESULT($SNAPSHOTS)

if [[ "x$SNAPSHOTS" != xnone -a "x$SNAPSHOTS" != xinternal -a "x$SNAPSHOTS" != xshared ]];
 then  AC_MSG_ERROR(
--with-snapshots parameter invalid
)
fi;

if test x$SNAPSHOTS = xinternal; then
	AC_DEFINE([SNAPSHOT_INTERNAL], 1, [Define to 1 to include built-in support for snapshots.])
fi

################################################################################
dnl -- mirrors inclusion type
AC_MSG_CHECKING(whether to include mirrors)
AC_ARG_WITH(mirrors,
  [  --with-mirrors=TYPE     Mirror support: internal/shared/none
                          [TYPE=internal] ],
  [ MIRRORS="$withval" ],
  [ MIRRORS="internal" ])
AC_MSG_RESULT($MIRRORS)

if [[ "x$MIRRORS" != xnone -a "x$MIRRORS" != xinternal -a "x$MIRRORS" != xshared ]];
 then  AC_MSG_ERROR(
--with-mirrors parameter invalid
)
fi;

if test x$MIRRORS = xinternal; then
	AC_DEFINE([MIRRORED_INTERNAL], 1, [Define to 1 to include built-in support for mirrors.])
fi

################################################################################
dnl -- Disable readline
AC_MSG_CHECKING(whether to enable readline)
AC_ARG_ENABLE([readline],
  [  --disable-readline      Disable readline support],
  [READLINE=$enableval], [READLINE=maybe])
AC_MSG_RESULT($READLINE)

################################################################################
dnl -- Disable realtime clock support
AC_MSG_CHECKING(whether to enable realtime support)
AC_ARG_ENABLE(realtime, [  --enable-realtime       Enable realtime clock support],
REALTIME=$enableval)
AC_MSG_RESULT($REALTIME)

################################################################################
dnl -- Init pkg-config with dummy invokation:
dnl -- this is required because PKG_CHECK_MODULES macro is expanded
dnl -- to initialize the pkg-config environment only at the first invokation,
dnl -- that would be conditional in this configure.in.
pkg_config_init() {
	PKG_CHECK_MODULES(PKGCONFIGINIT, pkgconfiginit, [],
		[AC_MSG_RESULT([pkg-config initialized])])
	PKGCONFIG_INIT=1
}

################################################################################
dnl -- Build cluster LVM daemon
AC_MSG_CHECKING(whether to build cluster LVM daemon)
AC_ARG_WITH(clvmd,
  [  --with-clvmd=TYPE       Build cluster LVM Daemon.
                          The following cluster manager combinations are valid:
                           * cman,gulm             (RHEL4 or equivalent)
                           * cman                  (RHEL5 or equivalent)
                           * cman,corosync,openais (or selection of them)
                           * singlenode            (localhost only)
                           * all                   (autodetect)
                           * none                  (disable build)
                          [TYPE=none] ],
  [ CLVMD="$withval" ],
  [ CLVMD="none" ])
if test x$CLVMD = xyes; then
	CLVMD=all
fi
AC_MSG_RESULT($CLVMD)

dnl -- If clvmd enabled without cluster locking, automagically include it
if  test x$CLVMD != xnone && test x$CLUSTER = xnone; then
	CLUSTER=internal
fi

dnl -- init pkgconfig if required
if  test x$CLVMD != xnone && test x$PKGCONFIG_INIT != x1; then
	pkg_config_init
fi


dnl -- define build types
if [[ `expr x"$CLVMD" : '.*gulm.*'` != 0 ]]; then
	BUILDGULM=yes
fi
if [[ `expr x"$CLVMD" : '.*corosync.*'` != 0 ]]; then
	BUILDCOROSYNC=yes
fi
if [[ `expr x"$CLVMD" : '.*openais.*'` != 0 ]]; then
	BUILDOPENAIS=yes
fi
if [[ `expr x"$CLVMD" : '.*cman.*'` != 0 ]]; then
	BUILDCMAN=yes
fi

dnl -- sanity check around user selection
if test x$BUILDGULM = xyes; then
	if test x$BUILDCOROSYNC = xyes || \
	   test x$BUILDOPENAIS = xyes; then
		AC_MSG_ERROR([requested clvmd configuration is not valid])
	fi
fi

dnl -- define a soft bailout if we are autodetecting
soft_bailout() {
	NOTFOUND=1
}

hard_bailout() {
	AC_MSG_ERROR([bailing out])
}

dnl -- if clvmd=all then set soft_bailout (we don't want to error)
dnl -- and set all builds to yes. We need to do this here
dnl -- to skip the gulm + openais|corosync sanity check above.
if test x$CLVMD = xall; then
	bailout=soft_bailout
	BUILDGULM=yes
	BUILDCMAN=yes
	BUILDCOROSYNC=yes
	BUILDOPENAIS=yes
else
	bailout=hard_bailout
fi

dnl -- helper macro to check libs without adding them to LIBS
check_lib_no_libs() {
	lib_no_libs_arg1=$1
	shift
	lib_no_libs_arg2=$1
	shift
	lib_no_libs_args=$@
	AC_CHECK_LIB([$lib_no_libs_arg1],
		     [$lib_no_libs_arg2],,
		     [$bailout],
		     [$lib_no_libs_args])
	LIBS=$ac_check_lib_save_LIBS
}

dnl -- Look for gulm libraries if required.
if test x$BUILDGULM = xyes; then
	PKG_CHECK_MODULES(CCS, libccs, [HAVE_CCS=yes],
		[NOTFOUND=0
		AC_CHECK_HEADERS(ccs.h,,$bailout)
		check_lib_no_libs ccs ccs_connect
		if test $NOTFOUND = 0; then
			AC_MSG_RESULT([no pkg for libccs, using -lccs])
			CCS_LIBS="-lccs"
			HAVE_CCS=yes
		fi])
	PKG_CHECK_MODULES(GULM, libgulm, [HAVE_GULM=yes],
		[NOTFOUND=0
		AC_CHECK_HEADERS(libgulm.h,,$bailout)
		check_lib_no_libs gulm lg_core_login
		if test $NOTFOUND = 0; then
			AC_MSG_RESULT([no pkg for libgulm, using -lgulm])
			GULM_LIBS="-lgulm"
			HAVE_GULM=yes
		fi])
fi

dnl -- Look for cman libraries if required.
if test x$BUILDCMAN = xyes; then
	PKG_CHECK_MODULES(CMAN, libcman, [HAVE_CMAN=yes],
		[NOTFOUND=0
		AC_CHECK_HEADERS(libcman.h,,$bailout)
		check_lib_no_libs cman cman_init
		if test $NOTFOUND = 0; then
			AC_MSG_RESULT([no pkg for libcman, using -lcman])
			CMAN_LIBS="-lcman"
			HAVE_CMAN=yes
		fi])
	CHECKCONFDB=yes
	CHECKDLM=yes
fi

dnl -- Look for corosync that's required also for openais build
dnl -- only enough recent version of corosync ship pkg-config files.
dnl -- We can safely rely on that to detect the correct bits.
if test x$BUILDCOROSYNC = xyes || \
   test x$BUILDOPENAIS = xyes; then
	PKG_CHECK_MODULES(COROSYNC, corosync, [HAVE_COROSYNC=yes], $bailout)
	CHECKCONFDB=yes
fi

dnl -- Look for corosync libraries if required.
if test x$BUILDCOROSYNC = xyes; then
	PKG_CHECK_MODULES(QUORUM, libquorum, [HAVE_QUORUM=yes], $bailout)
	CHECKCPG=yes
	CHECKDLM=yes
fi

dnl -- Look for openais libraries if required.
if test x$BUILDOPENAIS = xyes; then
	PKG_CHECK_MODULES(SALCK, libSaLck, [HAVE_SALCK=yes], $bailout)
	CHECKCPG=yes
fi

dnl -- Below are checks for libraries common to more than one build.

dnl -- Check confdb library.
dnl -- mandatory for corosync build.
dnl -- optional for openais/cman build.

if test x$CHECKCONFDB = xyes; then
	PKG_CHECK_MODULES(CONFDB, libconfdb,
			  [HAVE_CONFDB=yes],
			  [HAVE_CONFDB=no])

	AC_CHECK_HEADERS(corosync/confdb.h,
		[HAVE_CONFDB_H=yes],
		[HAVE_CONFDB_H=no])

	if test x$HAVE_CONFDB != xyes && \
	   test x$HAVE_CONFDB_H = xyes; then
		check_lib_no_libs confdb confdb_initialize
		AC_MSG_RESULT([no pkg for confdb, using -lconfdb])
		CONFDB_LIBS="-lconfdb"
		HAVE_CONFDB=yes
	fi

	if test x$BUILDCOROSYNC = xyes && \
	   test x$HAVE_CONFDB != xyes &&
	   test x$CLVMD != xall; then
		AC_MSG_ERROR([bailing out... confdb library is required])
	fi
fi

dnl -- Check cpg library.
if test x$CHECKCPG = xyes; then
	PKG_CHECK_MODULES(CPG, libcpg, [HAVE_CPG=yes], $bailout)
fi

dnl -- Check dlm library.
if test x$CHECKDLM = xyes; then
	PKG_CHECK_MODULES(DLM, libdlm, [HAVE_DLM=yes],
		[NOTFOUND=0
		AC_CHECK_HEADERS(libdlm.h,,$bailout)
		check_lib_no_libs dlm dlm_lock -lpthread
		if test $NOTFOUND = 0; then
			AC_MSG_RESULT([no pkg for libdlm, using -ldlm])
			DLM_LIBS="-ldlm -lpthread"
			HAVE_DLM=yes
		fi])
fi

dnl -- If we are autodetecting, we need to re-create
dnl -- the depedencies checks and set a proper CLVMD.
if test x$CLVMD = xall; then
	CLVMD=none
	if test x$HAVE_CCS = xyes && \
	   test x$HAVE_GULM = xyes; then
		AC_MSG_RESULT([Enabling clvmd gulm cluster manager])
		CLVMD="$CLVMD,gulm"
	fi
	if test x$HAVE_CMAN = xyes && \
	   test x$HAVE_DLM = xyes; then
		AC_MSG_RESULT([Enabling clvmd cman cluster manager])
		CLVMD="$CLVMD,cman"
	fi
	if test x$HAVE_COROSYNC = xyes && \
	   test x$HAVE_QUORUM = xyes && \
	   test x$HAVE_CPG = xyes && \
	   test x$HAVE_DLM = xyes && \
	   test x$HAVE_CONFDB = xyes; then
		AC_MSG_RESULT([Enabling clvmd corosync cluster manager])
		CLVMD="$CLVMD,corosync"
	fi
	if test x$HAVE_COROSYNC = xyes && \
	   test x$HAVE_CPG = xyes && \
	   test x$HAVE_SALCK = xyes; then
		AC_MSG_RESULT([Enabling clvmd openais cluster manager])
		CLVMD="$CLVMD,openais"
	fi
	if test x$CLVMD = xnone; then
		AC_MSG_RESULT([Disabling clvmd build. No cluster manager detected.])
	fi
fi

################################################################################
dnl -- Build cluster mirror log daemon
AC_MSG_CHECKING(whether to build cluster mirror log daemon)
AC_ARG_ENABLE(cmirrord, [  --enable-cmirrord       Enable the cluster mirror log daemon],
CMIRRORD=$enableval, CMIRRORD=no)
AC_MSG_RESULT($CMIRRORD)

BUILD_CMIRRORD=$CMIRRORD

################################################################################
dnl -- cmirrord pidfile
AH_TEMPLATE(CMIRRORD_PIDFILE, [Path to cmirrord pidfile.])
if test "x$BUILD_CMIRRORD" = xyes; then
	AC_ARG_WITH(cmirrord-pidfile,
		    [  --with-cmirrord-pidfile=PATH    cmirrord pidfile [[/var/run/cmirrord.pid]] ],
		    [ AC_DEFINE_UNQUOTED(CMIRRORD_PIDFILE,"$withval") ],
		    [ AC_DEFINE_UNQUOTED(CMIRRORD_PIDFILE,"/var/run/cmirrord.pid") ])
fi

################################################################################
dnl -- Look for corosync libraries if required.
if [[ "x$BUILD_CMIRRORD" = xyes ]]; then
	dnl -- init pkgconfig if required
	if  test x$PKGCONFIG_INIT != x1; then
		pkg_config_init
	fi
	PKG_CHECK_MODULES(SACKPT, libSaCkpt)
	if test x$HAVE_CPG != xyes; then
		PKG_CHECK_MODULES(CPG, libcpg)
	fi
fi

################################################################################
dnl -- Enable debugging
AC_MSG_CHECKING(whether to enable debugging)
AC_ARG_ENABLE(debug,    [  --enable-debug          Enable debugging],
  DEBUG=$enableval, DEBUG=no)
AC_MSG_RESULT($DEBUG)

dnl -- Normally turn off optimisation for debug builds
if test x$DEBUG = xyes; then
	COPTIMISE_FLAG=
else
	CSCOPE_CMD=
fi

################################################################################
dnl -- Override optimisation
AC_MSG_CHECKING(for C optimisation flag)
AC_ARG_WITH(optimisation,
  [  --with-optimisation=OPT C optimisation flag [[OPT=-O2]] ],
  [ COPTIMISE_FLAG="$withval" ])
AC_MSG_RESULT($COPTIMISE_FLAG)

################################################################################
dnl -- Enable profiling
AC_MSG_CHECKING(whether to gather gcov profiling data)
AC_ARG_ENABLE(profiling,
  AC_HELP_STRING(--enable-profiling, [Gather gcov profiling data]),
  PROFILING=$enableval, PROFILING=no)
AC_MSG_RESULT($PROFILING)

if test "x$PROFILING" = xyes; then
  COPTIMISE_FLAG="$COPTIMISE_FLAG -fprofile-arcs -ftest-coverage"
  AC_PATH_PROG(LCOV, lcov)
  AC_PATH_PROG(GENHTML, genhtml)
  if test -z "$LCOV" -o -z "$GENHTML"; then
    AC_MSG_ERROR([lcov and genhtml are required for profiling])
  fi
  AC_PATH_PROG(GENPNG, genpng)
  if test -n "$GENPNG"; then
    AC_MSG_CHECKING([whether $GENPNG has all required modules])
    if $GENPNG --help > /dev/null 2>&1 ; then
      AC_MSG_RESULT(ok)
      GENHTML="$GENHTML --frames"
    else
      AC_MSG_RESULT(not supported)
      AC_MSG_WARN([GD.pm perl module is not installed])
      GENPNG=
    fi
  fi
fi

################################################################################
dnl -- Disable devmapper
AC_MSG_CHECKING(whether to use device-mapper)
AC_ARG_ENABLE(devmapper, [  --disable-devmapper     Disable LVM2 device-mapper interaction],
DEVMAPPER=$enableval)
AC_MSG_RESULT($DEVMAPPER)

if test x$DEVMAPPER = xyes; then
	AC_DEFINE([DEVMAPPER_SUPPORT], 1, [Define to 1 to enable LVM2 device-mapper interaction.])
fi

################################################################################
dnl -- Enable udev synchronisation
AC_MSG_CHECKING(whether to enable synchronisation with udev processing)
AC_ARG_ENABLE(udev_sync, [  --enable-udev_sync      Enable synchronisation with udev processing],
UDEV_SYNC=$enableval, UDEV_SYNC=no)
AC_MSG_RESULT($UDEV_SYNC)

if test x$UDEV_SYNC = xyes; then
	AC_CHECK_LIB(udev, udev_queue_get_udev_is_active, UDEV_LIBS="-ludev", AC_MSG_ERROR(bailing out... libudev library is required))
	AC_DEFINE([UDEV_SYNC_SUPPORT], 1, [Define to 1 to enable synchronisation with udev processing.])
fi

dnl -- Enable udev rules
AC_MSG_CHECKING(whether to enable installation of udev rules required for synchronisation)
AC_ARG_ENABLE(udev_rules, [  --enable-udev_rules     Install rule files needed for udev synchronisation],
UDEV_RULES=$enableval, UDEV_RULES=$UDEV_SYNC)
AC_MSG_RESULT($UDEV_RULES)

################################################################################
dnl -- Compatibility mode
AC_ARG_ENABLE(compat,   [  --enable-compat         Enable support for old device-mapper versions],
  DM_COMPAT=$enableval, DM_COMPAT=no)

################################################################################
dnl -- Compatible units suffix mode
AC_ARG_ENABLE(units-compat,
  [  --enable-units-compat   Enable output compatibility with old versions that
                          that don't use KiB-style unit suffixes],
  UNITS_COMPAT=$enableval, UNITS_COMPAT=no)

if test x$UNITS_COMPAT = xyes; then
	AC_DEFINE([DEFAULT_SI_UNIT_CONSISTENCY], 0, [Define to 0 to reinstate the pre-2.02.54 handling of unit suffixes.])
fi

################################################################################
dnl -- Disable ioctl
AC_ARG_ENABLE(ioctl,   [  --disable-driver        Disable calls to device-mapper in the kernel],
  DM_IOCTLS=$enableval)

################################################################################
dnl -- Disable O_DIRECT
AC_MSG_CHECKING(whether to enable O_DIRECT)
AC_ARG_ENABLE(o_direct, [  --disable-o_direct      Disable O_DIRECT],
ODIRECT=$enableval)
AC_MSG_RESULT($ODIRECT)

if test x$ODIRECT = xyes; then
	AC_DEFINE([O_DIRECT_SUPPORT], 1, [Define to 1 to enable O_DIRECT support.])
fi

################################################################################
dnl -- Enable liblvm2app.so
AC_MSG_CHECKING(whether to build liblvm2app.so application library)
AC_ARG_ENABLE(applib,
  [  --enable-applib         Build application library],
  APPLIB=$enableval, APPLIB=no)
AC_MSG_RESULT($APPLIB)
AC_SUBST([LVM2APP_LIB])
test x$APPLIB = xyes \
  && LVM2APP_LIB=-llvm2app \
  || LVM2APP_LIB=

################################################################################
dnl -- Enable cmdlib
AC_MSG_CHECKING(whether to compile liblvm2cmd.so)
AC_ARG_ENABLE(cmdlib, [  --enable-cmdlib         Build shared command library],
CMDLIB=$enableval, CMDLIB=no)
AC_MSG_RESULT($CMDLIB)
AC_SUBST([LVM2CMD_LIB])
test x$CMDLIB = xyes \
  && LVM2CMD_LIB=-llvm2cmd \
  || LVM2CMD_LIB=

################################################################################
dnl -- Enable pkg-config
AC_ARG_ENABLE(pkgconfig,   [  --enable-pkgconfig      Install pkgconfig support],
  PKGCONFIG=$enableval, PKGCONFIG=no)

################################################################################
dnl -- Enable installation of writable files by user
AC_ARG_ENABLE(write_install, AC_HELP_STRING([--enable-write_install],
	[Install user writable files]), 
	[WRITE_INSTALL=$enableval], [WRITE_INSTALL=no])

################################################################################
dnl -- Enable fsadm
AC_MSG_CHECKING(whether to install fsadm)
AC_ARG_ENABLE(fsadm, [AC_HELP_STRING([--disable-fsadm], [Disable fsadm])],
	FSADM=$enableval)
AC_MSG_RESULT($FSADM)

################################################################################
dnl -- enable dmeventd handling
AC_MSG_CHECKING(whether to use dmeventd)
AC_ARG_ENABLE(dmeventd, [  --enable-dmeventd       Enable the device-mapper event daemon],
DMEVENTD=$enableval)
AC_MSG_RESULT($DMEVENTD)

BUILD_DMEVENTD=$DMEVENTD

dnl -- dmeventd currently requires internal mirror support
if test x$DMEVENTD = xyes; then
   if test x$MIRRORS != xinternal; then
      AC_MSG_ERROR(
	--enable-dmeventd currently requires --with-mirrors=internal
      )
   fi
   if test x$CMDLIB = xno; then
      AC_MSG_ERROR(
        --enable-dmeventd requires --enable-cmdlib to be used as well
      )
   fi
fi

if test x$DMEVENTD = xyes; then
	AC_DEFINE([DMEVENTD], 1, [Define to 1 to enable the device-mapper event daemon.])
fi

################################################################################
dnl -- getline included in recent libc

AC_CHECK_LIB(c, getline, AC_DEFINE([HAVE_GETLINE], 1,
  [Define to 1 if getline is available.]))

################################################################################
dnl -- canonicalize_file_name included in recent libc

AC_CHECK_LIB(c, canonicalize_file_name,
  AC_DEFINE([HAVE_CANONICALIZE_FILE_NAME], 1,
    [Define to 1 if canonicalize_file_name is available.]))

################################################################################
dnl -- Clear default exec_prefix - install into /sbin rather than /usr/sbin
if [[ "x$exec_prefix" = xNONE -a "x$prefix" = xNONE ]];
 then  exec_prefix="";
fi;

################################################################################
dnl -- Check for dlopen
AC_CHECK_LIB(dl, dlopen, [
	AC_DEFINE([HAVE_LIBDL], 1, [Define to 1 if dynamic libraries are available.])
	DL_LIBS="-ldl"
	HAVE_LIBDL=yes ], [
	DL_LIBS=
	HAVE_LIBDL=no ])

################################################################################
dnl -- Check for shared/static conflicts
if [[ \( "x$LVM1" = xshared -o "x$POOL" = xshared -o "x$CLUSTER" = xshared \
      -o "x$SNAPSHOTS" = xshared -o "x$MIRRORS" = xshared \
      \) -a "x$STATIC_LINK" = xyes ]];
 then  AC_MSG_ERROR(
Features cannot be 'shared' when building statically
)
fi

################################################################################
if [[ "$DMEVENTD" = yes -o "$CLVMD" != none ]] ; then
	AC_CHECK_LIB([pthread], [pthread_mutex_lock],
		[PTHREAD_LIBS="-lpthread"], hard_bailout)
fi

################################################################################
dnl -- Disable selinux
AC_MSG_CHECKING(whether to enable selinux support)
AC_ARG_ENABLE(selinux, [  --disable-selinux       Disable selinux support],
  SELINUX=$enableval)
AC_MSG_RESULT($SELINUX)

################################################################################
dnl -- Check for selinux
if test x$SELINUX = xyes; then
	AC_CHECK_LIB([sepol], [sepol_check_context], [
		AC_DEFINE([HAVE_SEPOL], 1, [Define to 1 if sepol_check_context is available.])
		SELINUX_LIBS="-lsepol"])

	AC_CHECK_LIB([selinux], [is_selinux_enabled], [
		AC_CHECK_HEADERS([selinux/selinux.h],, hard_bailout)
		AC_DEFINE([HAVE_SELINUX], 1, [Define to 1 to include support for selinux.])
		SELINUX_LIBS="-lselinux $SELINUX_LIBS"
		HAVE_SELINUX=yes ], [
		AC_MSG_WARN(Disabling selinux)
		SELINUX_LIBS=
		HAVE_SELINUX=no ])
fi

################################################################################
dnl -- Check for realtime clock support
if test x$REALTIME = xyes; then
	AC_CHECK_LIB(rt, clock_gettime, HAVE_REALTIME=yes, HAVE_REALTIME=no)

	if test x$HAVE_REALTIME = xyes; then
		AC_DEFINE([HAVE_REALTIME], 1, [Define to 1 to include support for realtime clock.])
		LIBS="-lrt $LIBS"
	else
		AC_MSG_WARN(Disabling realtime clock)
	fi
fi

################################################################################
dnl -- Check for getopt
AC_CHECK_HEADERS(getopt.h, AC_DEFINE([HAVE_GETOPTLONG], 1, [Define to 1 if getopt_long is available.]))

################################################################################
dnl -- Check for readline (Shamelessly copied from parted 1.4.17)
if test x$READLINE != xno; then
	lvm_saved_libs=$LIBS
	AC_SEARCH_LIBS([tgetent], [tinfo ncurses curses termcap termlib],
		READLINE_LIBS=$ac_cv_search_tgetent, [
		if test "$READLINE" = yes; then
			AC_MSG_ERROR(
[termcap could not be found which is required for the
--enable-readline option (which is enabled by default).  Either disable readline
support with --disable-readline or download and install termcap from:
	ftp.gnu.org/gnu/termcap
Note: if you are using precompiled packages you will also need the development
  package as well (which may be called termcap-devel or something similar).
Note: (n)curses also seems to work as a substitute for termcap.  This was
  not found either - but you could try installing that as well.])
		fi])
	dnl -- Old systems may need extra termcap dependency explicitly in LIBS
	AC_CHECK_LIB([readline], [readline], [
		AC_DEFINE([READLINE_SUPPORT], 1,
			[Define to 1 to include the LVM readline shell.])
		dnl -- Try only with -lreadline and check for different symbol
		LIBS=$lvm_saved_libs
		AC_CHECK_LIB([readline], [rl_line_buffer],
			[ READLINE_LIBS="-lreadline" ], [
			  AC_MSG_RESULT([linking -lreadline with $READLINE_LIBS needed])
			  READLINE_LIBS="-lreadline $READLINE_LIBS"
			]) ], [
		READLINE_LIBS=
		if test "$READLINE" = yes; then
			AC_MSG_ERROR(
[GNU Readline could not be found which is required for the
--enable-readline option (which is enabled by default).  Either disable readline
support with --disable-readline or download and install readline from:
	ftp.gnu.org/gnu/readline
Note: if you are using precompiled packages you will also need the development
package as well (which may be called readline-devel or something similar).])
		fi ])
	LIBS="$READLINE_LIBS $lvm_saved_libs"
	AC_CHECK_FUNCS([rl_completion_matches])
	LIBS=$lvm_saved_libs
fi

################################################################################
dnl -- Internationalisation stuff
AC_MSG_CHECKING(whether to enable internationalisation)
AC_ARG_ENABLE(nls, [  --enable-nls            Enable Native Language Support],
		INTL=$enableval, INTL=no)
AC_MSG_RESULT($INTL)

if test x$INTL = xyes; then
# FIXME - Move this - can be device-mapper too
	INTL_PACKAGE="lvm2"
	AC_PATH_PROG(MSGFMT, msgfmt)
	if [[ "x$MSGFMT" == x ]];
		then  AC_MSG_ERROR(
		msgfmt not found in path $PATH
		)
	fi;

	AC_ARG_WITH(localedir,
		    [  --with-localedir=DIR    Translation files in DIR [[PREFIX/share/locale]] ],
		    [ LOCALEDIR="$withval" ],
		    [ LOCALEDIR='${prefix}/share/locale' ])
fi

################################################################################
AC_ARG_WITH(confdir,
	    [  --with-confdir=DIR      Configuration files in DIR [[/etc]]],
	    [ CONFDIR="$withval" ],
	    [ CONFDIR='/etc' ])

AC_ARG_WITH(staticdir,
	    [  --with-staticdir=DIR    Static binary in DIR [[EPREFIX/sbin]]],
	    [ STATICDIR="$withval" ],
	    [ STATICDIR='${exec_prefix}/sbin' ])

AC_ARG_WITH(usrlibdir,
	    [  --with-usrlibdir=DIR],
	    [ usrlibdir="$withval"],
	    [ usrlibdir='${prefix}/lib' ])

AC_ARG_WITH(usrsbindir,
	    [  --with-usrsbindir=DIR],
	    [ usrsbindir="$withval"],
	    [ usrsbindir='${prefix}/sbin' ])

################################################################################
AC_ARG_WITH(udev_prefix,
	    [  --with-udev-prefix=UPREFIX      Install udev rule files in UPREFIX [[EPREFIX]]],
            [ udev_prefix="$withval"],
            [ udev_prefix='${exec_prefix}' ])

AC_ARG_WITH(udevdir,
	    [  --with-udevdir=DIR      udev rules in DIR [[UPREFIX/lib/udev/rules.d]]],
	    [ udevdir="$withval"],
	    [ udevdir='${udev_prefix}/lib/udev/rules.d' ])

################################################################################
dnl -- Ensure additional headers required
if test x$READLINE = xyes; then
	AC_CHECK_HEADERS(readline/readline.h readline/history.h,,AC_MSG_ERROR(bailing out))
fi

if test x$CLVMD != xnone; then
	AC_CHECK_HEADERS(mntent.h netdb.h netinet/in.h pthread.h search.h sys/mount.h sys/socket.h sys/uio.h sys/un.h utmpx.h,,AC_MSG_ERROR(bailing out))
	AC_CHECK_FUNCS(dup2 getmntent memmove select socket,,AC_MSG_ERROR(bailing out))
	AC_FUNC_GETMNTENT
#	AC_FUNC_REALLOC
	AC_FUNC_SELECT_ARGTYPES
fi

if test x$CLUSTER != xnone; then
	AC_CHECK_HEADERS(sys/socket.h sys/un.h,,AC_MSG_ERROR(bailing out))
	AC_CHECK_FUNCS(socket,,AC_MSG_ERROR(bailing out))
fi

if test x$HAVE_LIBDL = xyes; then
	AC_CHECK_HEADERS(dlfcn.h,,AC_MSG_ERROR(bailing out))
fi

if test x$INTL = xyes; then
	AC_CHECK_HEADERS(libintl.h,,AC_MSG_ERROR(bailing out))
fi

if test x$UDEV_SYNC = xyes; then
	AC_CHECK_HEADERS(sys/ipc.h sys/sem.h,,AC_MSG_ERROR(bailing out))
fi

################################################################################
AC_PATH_PROG(MODPROBE_CMD, modprobe)

if test x$MODPROBE_CMD != x; then
	AC_DEFINE_UNQUOTED([MODPROBE_CMD], ["$MODPROBE_CMD"], [The path to 'modprobe', if available.])
fi

################################################################################
dnl -- dmeventd pidfile and executable path
AH_TEMPLATE(DMEVENTD_PIDFILE, [Path to dmeventd pidfile.])
if test "$BUILD_DMEVENTD" = yes; then
	AC_ARG_WITH(dmeventd-pidfile,
		    [  --with-dmeventd-pidfile=PATH    dmeventd pidfile [[/var/run/dmeventd.pid]] ],
		    [ AC_DEFINE_UNQUOTED(DMEVENTD_PIDFILE,"$withval") ],
		    [ AC_DEFINE_UNQUOTED(DMEVENTD_PIDFILE,"/var/run/dmeventd.pid") ])
fi

AH_TEMPLATE(DMEVENTD_PATH, [Path to dmeventd binary.])
if test "$BUILD_DMEVENTD" = yes; then
        dmeventd_prefix="$exec_prefix"
        if test "x$dmeventd_prefix" = "xNONE"; then
                dmeventd_prefix="$prefix"
        fi
        if test "x$dmeventd_prefix" = "xNONE"; then
                dmeventd_prefix=""
        fi
	AC_ARG_WITH(dmeventd-path,
		    [  --with-dmeventd-path=PATH       dmeventd path [[EPREFIX/sbin/dmeventd]] ],
		    [ AC_DEFINE_UNQUOTED(DMEVENTD_PATH,"$withval") ],
		    [ AC_DEFINE_UNQUOTED(DMEVENTD_PATH,"$dmeventd_prefix/sbin/dmeventd") ])
fi

################################################################################
dnl -- which kernel interface to use (ioctl only)
AC_MSG_CHECKING(for kernel interface choice)
AC_ARG_WITH(interface,
  [  --with-interface=IFACE  Choose kernel interface (ioctl) [[ioctl]] ],
  [ interface="$withval" ],
  [ interface=ioctl ])
if [[ "x$interface" != xioctl ]];
then
  AC_MSG_ERROR(--with-interface=ioctl required. fs no longer supported.)
fi
AC_MSG_RESULT($interface)

################################################################################
DM_LIB_VERSION="\"`cat "$srcdir"/VERSION_DM 2>/dev/null || echo Unknown`\""
AC_DEFINE_UNQUOTED(DM_LIB_VERSION, $DM_LIB_VERSION, [Library version])

DM_LIB_PATCHLEVEL=`cat "$srcdir"/VERSION_DM | $AWK -F '[[-. ]]' '{printf "%s.%s.%s",$1,$2,$3}'`

LVM_VERSION="\"`cat "$srcdir"/VERSION 2>/dev/null || echo Unknown`\""

VER=`cat "$srcdir"/VERSION`
LVM_RELEASE_DATE="\"`echo $VER | $SED 's/.* (//;s/).*//'`\""
VER=`echo "$VER" | $AWK '{print $1}'`
LVM_RELEASE="\"`echo "$VER" | $AWK -F '-' '{print $2}'`\""
VER=`echo "$VER" | $AWK -F '-' '{print $1}'`
LVM_MAJOR=`echo "$VER" | $AWK -F '.' '{print $1}'`
LVM_MINOR=`echo "$VER" | $AWK -F '.' '{print $2}'`
LVM_PATCHLEVEL=`echo "$VER" | $AWK -F '[[(.]]' '{print $3}'`
LVM_LIBAPI=`echo "$VER" | $AWK -F '[[()]]' '{print $2}'`

################################################################################
AC_SUBST(APPLIB)
AC_SUBST(BUILD_CMIRRORD)
AC_SUBST(BUILD_DMEVENTD)
AC_SUBST(CCS_CFLAGS)
AC_SUBST(CCS_LIBS)
AC_SUBST(CFLAGS)
AC_SUBST(CFLOW_CMD)
AC_SUBST(CLDFLAGS)
AC_SUBST(CLDNOWHOLEARCHIVE)
AC_SUBST(CLDWHOLEARCHIVE)
AC_SUBST(CLUSTER)
AC_SUBST(CLVMD)
AC_SUBST(CMAN_CFLAGS)
AC_SUBST(CMAN_LIBS)
AC_SUBST(CMDLIB)
AC_SUBST(CONFDB_CFLAGS)
AC_SUBST(CONFDB_LIBS)
AC_SUBST(CONFDIR)
AC_SUBST(COPTIMISE_FLAG)
AC_SUBST(CPG_CFLAGS)
AC_SUBST(CPG_LIBS)
AC_SUBST(CSCOPE_CMD)
AC_SUBST(DEBUG)
AC_SUBST(DEVMAPPER)
AC_SUBST(DLM_CFLAGS)
AC_SUBST(DLM_LIBS)
AC_SUBST(DL_LIBS)
AC_SUBST(DMEVENTD)
AC_SUBST(DM_COMPAT)
AC_SUBST(DM_DEVICE_GID)
AC_SUBST(DM_DEVICE_MODE)
AC_SUBST(DM_DEVICE_UID)
AC_SUBST(DM_IOCTLS)
AC_SUBST(DM_LIB_VERSION)
AC_SUBST(DM_LIB_PATCHLEVEL)
AC_SUBST(FSADM)
AC_SUBST(GULM_CFLAGS)
AC_SUBST(GULM_LIBS)
AC_SUBST(HAVE_LIBDL)
AC_SUBST(HAVE_REALTIME)
AC_SUBST(INTL)
AC_SUBST(INTL_PACKAGE)
AC_SUBST(JOBS)
AC_SUBST(LDDEPS)
AC_SUBST(LIBS)
AC_SUBST(LIB_SUFFIX)
AC_SUBST(LOCALEDIR)
AC_SUBST(LVM1)
AC_SUBST(LVM1_FALLBACK)
AC_SUBST(LVM_VERSION)
AC_SUBST(LVM_LIBAPI)
AC_SUBST(LVM_MAJOR)
AC_SUBST(LVM_MINOR)
AC_SUBST(LVM_PATCHLEVEL)
AC_SUBST(LVM_RELEASE)
AC_SUBST(LVM_RELEASE_DATE)
AC_SUBST(MIRRORS)
AC_SUBST(MSGFMT)
AC_SUBST(PKGCONFIG)
AC_SUBST(POOL)
AC_SUBST(PTHREAD_LIBS)
AC_SUBST(QUORUM_CFLAGS)
AC_SUBST(QUORUM_LIBS)
AC_SUBST(READLINE_LIBS)
AC_SUBST(SACKPT_CFLAGS)
AC_SUBST(SACKPT_LIBS)
AC_SUBST(SALCK_CFLAGS)
AC_SUBST(SALCK_LIBS)
AC_SUBST(SELINUX_LIBS)
AC_SUBST(SNAPSHOTS)
AC_SUBST(STATICDIR)
AC_SUBST(STATIC_LINK)
AC_SUBST(UDEV_LIBS)
AC_SUBST(UDEV_RULES)
AC_SUBST(UDEV_SYNC)
AC_SUBST(WRITE_INSTALL)
AC_SUBST(interface)
AC_SUBST(kerneldir)
AC_SUBST(missingkernel)
AC_SUBST(kernelvsn)
AC_SUBST(tmpdir)
AC_SUBST(udev_prefix)
AC_SUBST(udevdir)
AC_SUBST(usrlibdir)
AC_SUBST(usrsbindir)

################################################################################
dnl -- First and last lines should not contain files to generate in order to
dnl -- keep utility scripts running properly
AC_CONFIG_FILES([
Makefile
make.tmpl
daemons/Makefile
daemons/clvmd/Makefile
daemons/cmirrord/Makefile
daemons/dmeventd/Makefile
daemons/dmeventd/libdevmapper-event.pc
daemons/dmeventd/plugins/Makefile
daemons/dmeventd/plugins/lvm2/Makefile
daemons/dmeventd/plugins/mirror/Makefile
daemons/dmeventd/plugins/snapshot/Makefile
doc/Makefile
include/.symlinks
include/Makefile
lib/Makefile
lib/format1/Makefile
lib/format_pool/Makefile
lib/locking/Makefile
lib/mirror/Makefile
lib/misc/lvm-version.h
lib/snapshot/Makefile
libdm/Makefile
libdm/libdevmapper.pc
liblvm/Makefile
liblvm/liblvm2app.pc
man/Makefile
po/Makefile
scripts/clvmd_init_red_hat
scripts/cmirrord_init_red_hat
scripts/lvm2_monitoring_init_red_hat
scripts/Makefile
test/Makefile
test/api/Makefile
tools/Makefile
udev/Makefile
])
AC_OUTPUT

if test x$ODIRECT != xyes; then
  AC_MSG_WARN(Warning: O_DIRECT disabled: low-memory pvmove may lock up)
fi