File: configure.in

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sane-backends-extras 1.0.22.4
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dnl Process this file with autoconf to produce a configure script. -*-m4-*-

dnl ***********************************************************************
dnl When preparing a release, increase the numeric and string version numbers,
dnl remove the "cvs" suffix, and set is_release=yes
AC_INIT([sane-backends],[1.0.22],[sane-devel@lists.alioth.debian.org])
V_MAJOR=1
V_MINOR=0
V_REV=22
is_release=yes
dnl ***********************************************************************

m4_ifdef([AC_CONFIG_MACRO_DIR], [AC_CONFIG_MACRO_DIR([m4])])

AM_INIT_AUTOMAKE
dnl Turn off feature were automake will automatically run autoreconf.
dnl This is because we check in generated files into CVS which has
dnl known timestamp issues.
AM_MAINTAINER_MODE

AC_CONFIG_HEADERS([include/sane/config.h])
AC_PREREQ(2.54) dnl Minimum Autoconf version required.

PACKAGE=AC_PACKAGE_NAME
VERSION=AC_PACKAGE_VERSION
NUMBER_VERSION=${V_MAJOR}.${V_MINOR}.${V_REV}
AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE",
                   [Define to the name of the distribution.])
AC_DEFINE_UNQUOTED(VERSION, "$VERSION",
                   [Define to the version of the distribution.])
AC_DEFINE_UNQUOTED(SANE_DLL_V_MAJOR, $V_MAJOR, [SANE DLL major number])
AC_DEFINE_UNQUOTED(SANE_DLL_V_MINOR, $V_MINOR, [SANE DLL minor number])
AC_DEFINE_UNQUOTED(SANE_DLL_V_BUILD, $V_REV, [SANE DLL revision number])
AC_SUBST(V_MAJOR)
AC_SUBST(V_MINOR)
AC_SUBST(V_REV)
AC_SUBST(PACKAGE)
AC_SUBST(VERSION)
AC_SUBST(NUMBER_VERSION)
AC_CANONICAL_BUILD
AC_CANONICAL_HOST 

dnl no bloody way to have a decent --docdir...
AC_ARG_WITH(docdir, 
  AC_HELP_STRING([--with-docdir=DIR],
                 [documentation @<:@PREFIX/doc/sane-VERSION@:>@]),
[
  docdir="${withval}"
  AC_SUBST([docdir])dnl
], [
  AC_SUBST([docdir],         ['${prefix}/doc/sane-${VERSION}'])dnl
])

dnl ***********************************************************************
dnl Checks for programs.
dnl ***********************************************************************
AC_PROG_CC
AM_PROG_CC_C_O
AC_PROG_INSTALL
AC_PROG_MAKE_SET
AC_PROG_CPP
AC_PROG_GCC_TRADITIONAL
AC_PATH_PROG(SANE_CONFIG_PATH, sane-config, no)
AC_PATH_PROG(MSGFMT, msgfmt$EXEEXT, no)
AC_PATH_PROG(XGETTEXT, xgettext$EXEEXT, no)
AC_PATH_PROG(MSGMERGE, msgmerge$EXEEXT, no)
AC_PATH_PROG(LATEX, latex$EXEEXT, no)
AC_PATH_PROG(DVIPS, dvips$EXEEXT, no)
AC_PATH_PROG(MAKEINDEX, makeindex$EXEEXT, no)
AC_SUBST(MSGFMT)
AC_SUBST(XGETTEXT)
AC_SUBST(MSGMERGE)
AC_SUBST(LATEX)
AC_SUBST(DVIPS)
AC_SUBST(MAKEINDEX)

dnl Call explicitely before using PKG_*
PKG_PROG_PKG_CONFIG

AM_CONDITIONAL(CROSS_COMPILING, test x$cross_compiling = xyes)

dnl ***********************************************************************
dnl set compiler/linker flags
dnl ***********************************************************************
INCLUDES="${INCLUDES} -I/usr/local/include"
AC_SUBST(INCLUDES)
SANE_SET_CFLAGS([$is_release])
SANE_SET_LDFLAGS
dnl SANE_LINKER_RPATH

dnl ***********************************************************************
dnl Checks for unix variants
dnl ***********************************************************************
m4_ifdef([AC_USE_SYSTEM_EXTENSIONS], [AC_USE_SYSTEM_EXTENSIONS])
m4_ifndef([AC_USE_SYSTEM_EXTENSIONS],[AC_GNU_SOURCE])
m4_ifndef([AC_USE_SYSTEM_EXTENSIONS],[AC_AIX])
m4_ifndef([AC_USE_SYSTEM_EXTENSIONS],[AC_MINIX])
AC_ISC_POSIX

AC_NEED_BYTEORDER_H([include/byteorder.h])
AX_CREATE_STDINT_H([include/_stdint.h])

dnl ***********************************************************************
dnl Checks for libraries
dnl ***********************************************************************
SANE_CHECK_DLL_LIB
dnl Checks for Backend libraries.
AC_CHECK_LIB(m, sqrt, MATH_LIB="-lm")
AC_SUBST(MATH_LIB)
case ${host_os} in
  os2*)
  AC_CHECK_LIB(syslog, sylog, SYSLOG_LIBS="-lsyslog")
  ;;
  beos*)
  AC_CHECK_LIB(be, syslog, SYSLOG_LIBS="-lbe")
  ;;
esac
AC_SUBST(SYSLOG_LIBS)

SANE_CHECK_JPEG
SANE_CHECK_TIFF
SANE_CHECK_IEEE1284
SANE_CHECK_PTHREAD
SANE_CHECK_LOCKING
SANE_CHECK_GPHOTO2


PKG_CHECK_MODULES(LIBV4L, libv4l1, have_libv4l1=yes, have_libv4l1=no)
AC_SUBST(LIBV4L_LIBS)
AC_SUBST(LIBV4L_CFLAGS)

AC_ARG_ENABLE(avahi,
	AC_HELP_STRING([--enable-avahi], [enable Avahi support for saned and the net backend]),
	[enable_avahi=$enableval], [enable_avahi=no])

if test "$enable_avahi" = "yes"; then
  PKG_CHECK_MODULES(AVAHI, [ avahi-client >= 0.6.24 ],
                    [AC_DEFINE(WITH_AVAHI, 1, [define if Avahi support is enabled for saned and the net backend])], enable_avahi=no)
fi

dnl check sane to make sure we don't have two installations
AC_CHECK_LIB(sane, sane_init, LIBSANE_EXISTS="yes")


dnl **************************************************************
dnl SNMP CHECKS
dnl **************************************************************

AC_ARG_WITH(snmp,
	AC_HELP_STRING([--with-snmp], [enable SNMP support @<:@default=yes@:>@]))

if test "$with_snmp" = "no"; then
	echo "Not including SNMP support"
else
	AC_PATH_PROG(SNMP_CONFIG_PATH, net-snmp-config, "no")
	AC_CHECK_LIB([netsnmp], [snmp_timeout], LIBSNMP_EXISTS="yes")
	AC_MSG_CHECKING(for proper SNMP version)
	if test "$SNMP_CONFIG_PATH" != "no" ; then
		snmp_version=`$SNMP_CONFIG_PATH --version 2>/dev/null`
		vers=`echo $snmp_version | awk 'BEGIN { FS = "."; } { printf "%d", ($1 * 1000 + $2);}'`
		if test -n "$vers" && test "$vers" -ge 5006; then
			SNMP_LIBS=`$SNMP_CONFIG_PATH --libs`
			SNMP_CFLAGS=`$SNMP_CONFIG_PATH --cflags`
			AC_MSG_RESULT(yes)
			with_snmp="yes"
		else
			AC_MSG_RESULT(no)
			AC_MSG_WARN([You need at least net-snmp 5.6, your version is $snmp_version])
			with_snmp="no"
		fi
	else
		with_snmp="no"
		AC_MSG_RESULT(no)
	fi
fi

if test "$with_snmp" = "yes"; then
	LIBS="$LIBS $SNMP_LIBS"
	CFLAGS="$CFLAGS $SNMP_CFLAGS"
	AC_DEFINE(HAVE_LIBSNMP, 1, [Define to 1 if you have the net-snmp library.])
else
	AC_MSG_WARN([*** Warning: net-snmp library disabled, autodetecting network scanners will not be supported.])
fi





dnl ***********************************************************************
dnl Checks for header files.
dnl ***********************************************************************
AC_HEADER_STDC
AC_CHECK_HEADERS(fcntl.h unistd.h libc.h sys/dsreq.h sys/select.h \
    sys/time.h sys/shm.h sys/ipc.h sys/signal.h sys/scanio.h os2.h \
    sys/socket.h sys/io.h sys/hw.h sys/types.h linux/ppdev.h \
    dev/ppbus/ppi.h machine/cpufunc.h sys/bitypes.h sys/sem.h sys/poll.h \
    windows.h be/kernel/OS.h limits.h sys/ioctl.h asm/types.h\
    netinet/in.h tiffio.h ifaddrs.h pwd.h getopt.h)
AC_CHECK_HEADERS([asm/io.h],,,[#include <sys/types.h>])

SANE_CHECK_MISSING_HEADERS

AC_CHECK_HEADER(resmgr.h,[
	AC_CHECK_LIB(
		resmgr,
		rsm_open_device,[
			AC_DEFINE(HAVE_RESMGR,1,[define if you have the resmgr library])
			RESMGR_LIBS="-lresmgr"
		]
	)
])
AC_SUBST(RESMGR_LIBS)

dnl ***********************************************************************
dnl Checks for types and structures
dnl ***********************************************************************
AC_TYPE_SIGNAL
AC_TYPE_SIZE_T
AC_TYPE_PID_T
AC_CHECK_TYPE(ssize_t, long)
SANE_CHECK_U_TYPES

# from Python, check for "long long" type
AC_MSG_CHECKING(for long long support)
have_long_long=no
AC_TRY_COMPILE([], [long long x; x = (long long)0;], AC_DEFINE(HAVE_LONG_LONG, 1, [Define if the long long type is available.]) have_long_long=yes)
AC_MSG_RESULT($have_long_long)

AC_MSG_CHECKING([for socklen_t in <sys/socket.h>])
AC_TRY_COMPILE([
#include <sys/socket.h>
],[socklen_t len],AC_MSG_RESULT(yes),
[AC_MSG_RESULT(no); AC_DEFINE(socklen_t,int,
[Define socklen_t as \'int\' if necessary.])])

AC_MSG_CHECKING([for union semun in <sys/sem.h>])
AC_TRY_COMPILE([
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
],[union semun test_semun],[AC_MSG_RESULT(yes);
AC_DEFINE(HAVE_UNION_SEMUN,1,[Define if union semun is available.])],
AC_MSG_RESULT(no))

AC_MSG_CHECKING([for struct flock in fcntl.h])
AC_EGREP_HEADER([struct flock], fcntl.h, [AC_MSG_RESULT(yes) ;
                AC_DEFINE(HAVE_STRUCT_FLOCK, 1,
                [Define if struct flock is available.])], AC_MSG_RESULT(no))

AC_MSG_CHECKING([for Linux ioctl defines])
AC_TRY_COMPILE([
#include <sys/ioctl.h>
#include <asm/types.h>
],[
__u32 houba = _IOR('v',14, unsigned long);
],[AC_MSG_RESULT(yes);
have_linux_ioctl_defines="yes";],AC_MSG_RESULT(no))

dnl ***********************************************************************
dnl Checks for compiler characteristics
dnl ***********************************************************************
AC_C_BIGENDIAN
AC_C_CONST
AC_C_INLINE

dnl ***********************************************************************
dnl Checks for library functions
dnl ***********************************************************************

dnl Define SOCKET_LIB, NSL_LIB, BIND_LIB, and RESOLV_LIB  when required 
dnl for functions we use.
AC_CHECK_FUNC(gethostbyaddr,, [AC_CHECK_LIB(bind, gethostbyaddr, BIND_LIB="-lbind")])
AC_CHECK_FUNC(gethostbyaddr,, [AC_CHECK_LIB(nsl, gethostbyaddr, NSL_LIB="-lnsl")])
AC_CHECK_FUNC(socket, [SOCKET_LIBS=], [AC_CHECK_LIB(socket, socket, SOCKET_LIB="-lsocket")])
AC_CHECK_FUNC(inet_aton,, [AC_CHECK_LIB(resolv, inet_aton, RESOLV_LIB="-lresolv")])

dnl Group related network libraries together so they can always be linked
dnl in.
SOCKET_LIBS="$SOCKET_LIB $NSL_LIB $BIND_LIB $RESOLV_LIB"
AC_SUBST(SOCKET_LIBS)

dnl define HAVE_* values for network functions.  This may require
dnl SOCKET_LIBS so set LIBS temporarily.
save_LIBS="$LIBS"
LIBS="$LIBS $SOCKET_LIBS"
AC_CHECK_FUNCS(inet_addr inet_aton inet_ntoa)
AC_REPLACE_FUNCS(inet_ntop inet_pton)
LIBS="$save_LIBS"

if test "$ac_cv_header_be_kernel_OS_h" = "yes" ; then
    dnl those are known to be broken in BeOS (BONE)
    ac_cv_func_getaddrinfo=no
    ac_cv_func_getnameinfo=no
fi

AC_FUNC_ALLOCA
AC_FUNC_MMAP
AC_CHECK_FUNCS(atexit ioperm i386_set_ioperm \
    mkdir strftime strstr strtod  \
    cfmakeraw tcsendbreak strcasecmp strncasecmp _portaccess \
    getaddrinfo getnameinfo poll setitimer iopl )
AC_REPLACE_FUNCS(getenv isfdtype sigprocmask snprintf \
    strcasestr strdup strndup strsep usleep vsyslog)

SANE_PROTOTYPES

if test "$ac_cv_header_os2_h" = "yes" ; then
  AC_DEFINE(strncasecmp, strnicmp, [Define for OS/2 only])
  AC_DEFINE(strcasecmp, stricmp, [Define for OS/2 only])
fi

if test "$ac_cv_header_getopt_h" = "yes" ; then
  AC_CHECK_FUNCS(getopt_long)
fi

dnl ***********************************************************************
dnl checks for system services
dnl ***********************************************************************
if test -c /dev/urandom ; then
    AC_DEFINE(HAVE_DEV_URANDOM, 1, [Is /dev/urandom available?])
fi

dnl ***********
dnl USB Support
dnl ***********

dnl Enable libusb-1.0, if available
AC_ARG_ENABLE(libusb_1_0,
	AC_HELP_STRING([--enable-libusb_1_0], [enable libusb-1.0 support if available]),
	[enable_libusb_1_0=$enableval], [enable_libusb_1_0=no])

dnl USB support enabled by default (if found).  Note: Overloading libusb
dnl option right now to disable USB support on any platform; even
dnl if they use a different library name.
AC_ARG_ENABLE(libusb, 
    AC_HELP_STRING([--disable-libusb], [disable support for USB in SANE]),,
    enable_libusb=auto)
HAVE_USB=no
if test "$enable_libusb" != "no"; then
  case ${host_os} in
  beos*)
  AC_CHECK_HEADERS(be/drivers/USB_scanner.h, HAVE_USB=yes, AC_MSG_ERROR([USB_scanner.h is required on BeOS]))
  ;;
  os2*)
  AC_CHECK_HEADER(usbcalls.h,
		  AC_CHECK_LIB(usbcall, UsbQueryNumberDevices, 
       			       [USB_LIBS="$USB_LIBS -lusbcall"
				HAVE_USB=yes]),,[#include <usb.h> 
#include <os2.h>
])
  ;;
  *)
  dnl If libusb-1.0 is enabled and available, prefer that to the old libusb
  have_libusb_1_0=no
  if test "$enable_libusb_1_0" = "yes"; then
    PKG_CHECK_MODULES(LIBUSB_1_0, [ libusb-1.0 >= 1.0.0 ], have_libusb_1_0=yes, have_libusb_1_0=no)
    if test "$have_libusb_1_0" = "yes"; then
      CFLAGS="$CFLAGS $LIBUSB_1_0_CFLAGS"
      USB_LIBS="$USB_LIBS $LIBUSB_1_0_LIBS"
      HAVE_USB=yes
    fi
  fi

  if test "$have_libusb_1_0" = "no"; then
    dnl Fallback to the old libusb
    dnl libusb >= 0.1.8 is required, as we need usb_interrupt_read()
    AC_CHECK_HEADER(usb.h,
                    AC_CHECK_LIB(usb, usb_interrupt_read, 
                                 [USB_LIBS="$USB_LIBS -lusb"
                                  HAVE_USB=yes]))
  fi
  ;;
  esac
fi
dnl The following logic is useful for distributions.  If they force
dnl USB support with --enable-libusb=yes then configure will fail
dnl when its detected that it can not be supported.  Default is
dnl "auto" which means only enable if libraries are found and do
dnl not error out.
if test "$enable_libusb" = "yes" && test "$HAVE_USB" = "no"; then
  AC_MSG_ERROR([USB support requested but required libraries not found.])
fi
if test "$HAVE_USB" = "yes"; then
  case ${host_os} in
  os2*)
  AC_DEFINE(HAVE_USBCALL, 1, [Define to 1 if you have usbcall.dll.])
  ;;
  *)
  if test "$have_libusb_1_0" = "yes"; then
    AC_DEFINE(HAVE_LIBUSB_1_0, 1, [Define to 1 if you have libusb-1.0.])
  else
    AC_DEFINE(HAVE_LIBUSB, 1, [Define to 1 if you have libusb.])
  fi
  ;;
  esac
fi
AC_SUBST(USB_LIBS)

dnl ************
dnl SCSI Support
dnl ************

dnl FIXME: These are a lot of header files to scan.  We should
dnl scan for just one that is unique per platform and then do
dnl conditional scans for more specific only as needed.
AC_CHECK_HEADERS(IOKit/scsi/SCSITaskLib.h IOKit/cdb/IOSCSILib.h \
  IOKit/scsi/SCSICommandOperationCodes.h \
  IOKit/scsi-commands/SCSICommandOperationCodes.h scsi.h sys/scsi.h \
  sys/scsicmd.h sys/scsiio.h bsd/dev/scsireg.h scsi/sg.h \
  camlib.h scdds.h sys/scsi/scsi.h sys/scsi/sgdefs.h \
  sys/scsi/targets/scgio.h apollo/scsi.h sys/sdi_comm.h \
  sys/passthrudef.h)
AC_CHECK_HEADERS([io/cam/cam.h],,,[#include <io/common/iotypes.h>])

dnl FreeBSD < 3
if test "$ac_cv_header_sys_scsiio_h" = "yes" \
  -a "$ac_cv_header_scsi_h" = "yes"; then
  AC_MSG_CHECKING([if 'scsireq_t' needs to be defined as 'struct scsireq'])
  AC_TRY_COMPILE([
#include <sys/scsiio.h>
#include <scsi.h>
],[scsireq_t req],,
   [AC_MSG_RESULT(yes);
    AC_DEFINE(scsireq_t, struct scsireq_t,
    	      [Define scsireq_t as \'struct scsireq\' if necessary.])],
	      AC_MSG_RESULT(no))
fi
AC_CHECK_LIB(scsi, scsireq_enter, SCSI_LIBS="-lscsi") # FreeBSD needs this

dnl FreeBSD >= 3
AC_CHECK_LIB(cam, cam_open_device, SCSI_LIBS="-lcam")  # FreeBSD 3+ needs this

AC_CHECK_FUNCS(scsireq_enter)

if test "$ac_cv_header_scsi_sg_h" = "yes"; then
  AC_MSG_CHECKING([for sg_header.target_status in <scsi/sg.h>])
  AC_TRY_COMPILE([
#include <sys/types.h>
#include <scsi/sg.h>
],[
struct sg_header hdr;
hdr.target_status = 1;
return 0;
],[AC_MSG_RESULT(yes);
   AC_DEFINE(HAVE_SG_TARGET_STATUS,1,
	     [Define if sg_header.target_status is available.])],
	     AC_MSG_RESULT(no))
fi

if test "$ac_cv_header_IOKit_scsi_SCSITaskLib_h" = "yes"; then
  AC_MSG_CHECKING([for SCSITaskSGElement in IOKit/scsi/SCSITaskLib.h])
  AC_TRY_COMPILE([
#undef VERSION
#include <IOKit/scsi/SCSITaskLib.h>
],[
SCSITaskSGElement range;
return 0;
],[AC_MSG_RESULT(yes);
  AC_DEFINE(HAVE_SCSITASKSGELEMENT, 1,
	    [Define if SCSITaskSGElement is available.])],
  AC_MSG_RESULT(no))
fi

dnl disable Linux SCSI generic version 3 to avoid 32/64 bit problems
if sparc64 -q > /dev/null 2>&1 ; then
  AC_DEFINE(DISABLE_LINUX_SG_IO, 1, [Should we disable SCSI generic v3?])
fi

# Multiple platforms can set SCSI_LIBS so do substitution at end.
AC_SUBST(SCSI_LIBS)

AC_ARG_ENABLE(scsibuffersize, 
  AC_HELP_STRING([--enable-scsibuffersize=N],
                 [specify the default size in bytes of the buffer for SCSI
                  commands [[default=131072]]]),
  [set_scsibuffersize="$enableval"], [set_scsibuffersize=131072])
AC_DEFINE_UNQUOTED(SCSIBUFFERSIZE, $set_scsibuffersize,
                   [SCSI command buffer size])
dnl FIXME: Move tihs to configuration printout area but probably
dnl but probably needs to be wrapped by what ever uses it so its
dnl only printed when used.
echo "scsi buffersize: $set_scsibuffersize"

AC_ARG_ENABLE(scsi-directio,
  AC_HELP_STRING([--enable-scsi-directio],
                 [enable SCSI direct IO (Linux only, dangerous, see
                  README.linux)]),
  [
    if eval "test x$enable_scsi_directio = xyes"; then
      CFLAGS="$CFLAGS -DENABLE_SCSI_DIRECTIO"
    fi
  ])

dnl ****
dnl IPv6
dnl ****

dnl check for IPv6 (can be overriden by --enable-ipv6)
if test "$ac_cv_func_getnameinfo" = "yes" \
  && test "$ac_cv_func_getaddrinfo" = "yes" ; then
  SANE_CHECK_IPV6
else
  ipv6="no"
fi

dnl ***********************************************************************
dnl initialize libtool
dnl ***********************************************************************
AC_LIBTOOL_WIN32_DLL
AC_DISABLE_STATIC
AC_PROG_LIBTOOL

dnl Windows (cygwin/mingw), BeOS, and OS/2 need this.
case $host_os in
  cygwin* | mingw* | beos* | os2*)
  LDFLAGS="$LDFLAGS -no-undefined"
esac

dnl Check for lock dir

AC_ARG_WITH(lockdir, AC_HELP_STRING([--with-lockdir=DIR],
                                    [set SANE lockdir @<:@localstatedir/lock/sane@:>@]),
                                    [locksanedir=$withval],[locksanedir=${localstatedir}/lock/sane])
AC_SUBST(locksanedir)

configdir="${sysconfdir}/sane.d"
AC_SUBST(configdir)

dnl ***********************************************************************
dnl enable/disable backends and features based on previous tests and user's
dnl choice
dnl ***********************************************************************

CPPFLAGS="${CPPFLAGS} -DPATH_SANE_CONFIG_DIR=\$(configdir) \
	  -DPATH_SANE_DATA_DIR=\$(datadir) \
	  -DPATH_SANE_LOCK_DIR=\$(locksanedir) \
	  -DV_MAJOR=${V_MAJOR} -DV_MINOR=${V_MINOR}"

if test "${ac_cv_header_sys_socket_h}" = "no"; then
  echo "*** disabling saned (sys/socket.h not found)"
  SANED=
else
  SANED=saned
fi
AM_CONDITIONAL(COMPILE_SANED, test x$SANED = xsaned)

dnl These are the backends that are build in any case:

AC_ARG_ENABLE(local-backends,
  AC_HELP_STRING([--disable-local-backends],
                 [turn off compilation of all backends but net]))

ALL_BACKENDS="geniusvp2 ls5000"

# If user specifies backends manually then cause configure
# to fail if its detected it can't be compiled.  If we
# are in automatic mode then remove backend from list instead.
user_selected_backends="yes"

if eval "test x$enable_local_backends = xno"; then 
   BACKENDS="net"
else
  if test "${BACKENDS}" != "" ; then
    AC_MSG_NOTICE([Manually selected backends: ${BACKENDS}])
  else
    BACKENDS="$ALL_BACKENDS"
    user_selected_backends="no"
  fi
fi

SANE_CHECK_BACKENDS

if test "${sane_cv_use_libjpeg}" = "yes"; then
  SANEI_SANEI_JPEG_LO="../sanei/sanei_jpeg.lo"
fi
AM_CONDITIONAL(HAVE_JPEG, test x$sane_cv_use_libjpeg = xyes)
AC_SUBST(SANEI_SANEI_JPEG_LO)

BACKENDS="$FILTERED_BACKENDS"
BACKEND_LIBS_ENABLED=""
BACKEND_CONFS_ENABLED=""
BACKEND_MANS_ENABLED=""
for backend in ${BACKENDS} ; do
  BACKEND_LIBS_ENABLED="${BACKEND_LIBS_ENABLED} libsane-${backend}.la"
  BACKEND_CONFS_ENABLED="${BACKEND_CONFS_ENABLED} ${backend}.conf"
  BACKEND_MANS_ENABLED="${BACKEND_MANS_ENABLED} sane-${backend}.5"
done
AC_SUBST(BACKEND_LIBS_ENABLED)

if test "${enable_shared}" = "no"; then
  enable_preload=yes
fi
if test "${enable_dynamic}" != yes || test "${enable_preload}" = "yes"; then
  echo "preloading backends into DLL"

  # If user specifies backends manually then cause configure
  # to fail if its detected it can't be compiled.  If we
  # are in automatic mode then remove backend from list instead.
  user_selected_backends="yes"

  if eval "test x$enable_local_backends = xno"; then 
    PRELOADABLE_BACKENDS="net"
  else
    if test "${PRELOADABLE_BACKENDS}" != "" ; then
      AC_MSG_NOTICE([Manually selected preloadable backends: ${PRELOADABLE_BACKENDS}])
    else
      PRELOADABLE_BACKENDS="$ALL_BACKENDS"
      user_selected_backends="no"
    fi
  fi

  saved_BACKENDS="$BACKENDS"
  BACKENDS="${PRELOADABLE_BACKENDS}"

  SANE_CHECK_BACKENDS

  PRELOADABLE_BACKENDS="$FILTERED_BACKENDS"
  BACKENDS="$saved_BACKENDS"
else
  PRELOADABLE_BACKENDS=""
fi
PRELOADABLE_BACKENDS_ENABLED=""
# Do not initialize BACKEND_CONFS_ENABLED so that its a combination
# of all backends.
for backend in ${PRELOADABLE_BACKENDS} ; do
  BACKEND_CONFS_ENABLED="${BACKEND_CONFS_ENABLED} ${backend}.conf"
  BACKEND_MANS_ENABLED="${BACKEND_MANS_ENABLED} sane-${backend}.5"
  # Special hacks.  Normally, we create a convenience library that
  # matches the backend's name but in some cases that will conflict
  # with an external library name that also matches backend name.
  # Work around that here by renaming internal library.
  if test "${backend}" = "gphoto2"; then
    backend=gphoto2_i
  fi
  PRELOADABLE_BACKENDS_ENABLED="${PRELOADABLE_BACKENDS_ENABLED} lib${backend}.la"
done

AC_SUBST(PRELOADABLE_BACKENDS)
AC_SUBST(PRELOADABLE_BACKENDS_ENABLED)
AC_SUBST(BACKEND_CONFS_ENABLED)
AC_SUBST(BACKEND_MANS_ENABLED)

dnl in BeOS, backends are not installed in lib/sane, but add-ons/sane/
dnl we account for both installing in /boot/beos and ~/config
case $host_os in
  beos*)
  libdir='${exec_prefix}/add-ons'
  ;;
esac

AC_ARG_ENABLE(parport-directio,
  AC_HELP_STRING([--enable-parport-directio],
                 [enable direct hardware access to the parallel port, so 
                  frontends will require special permission level]),
  [
    if eval "test x$enable_parport_directio = xyes"; then
      CFLAGS="$CFLAGS -DENABLE_PARPORT_DIRECTIO"
    fi
  ])

AC_ARG_ENABLE(translations,
  AC_HELP_STRING([--disable-translations],
                 [don't install translations of backend options]),,
		 enable_translations=yes)
if eval "test x$enable_translations = xyes" ; then
  if test x$MSGFMT = xno || test x$XGETTEXT = xno || test $MSGMERGE = no ; then
    enable_translations=no
    echo "disabling translations (missing msgfmt, xgettext or msgmerge)"
  else
    echo "enabling translations"
  fi
else
  echo "disabling translations"
fi  
AM_CONDITIONAL(ENABLE_TRANSLATIONS, test x$enable_translations = xyes)

AC_ARG_ENABLE(latex,
	      AC_HELP_STRING([--disable-latex],
	      [disable use of latex, et.al., to generate documentation]),,
	      enable_latex=yes)
if test "x$enable_latex" = "xyes" ; then
  if test "x$LATEX" = "xno" || test "x$DVIPS" = "xno" || test "x$MAKEINDEX" = "xno" ; then
    enable_latex=no
    echo "disabling latex (missing latex, dvips or makeindex)"
  else
    echo "enabling latex"
  fi
else
  echo "disabling latex"
fi  
AM_CONDITIONAL(USE_LATEX, test x$enable_latex = xyes)

dnl ***********************************************************************
dnl Write output files
dnl ***********************************************************************

DISTCLEAN_FILES="*~ .*~ *.log *.bak *.old *.orig *.out *.rej \"\#\"* \".\\#\"*"
AC_SUBST(DISTCLEAN_FILES)

AC_CONFIG_FILES([Makefile lib/Makefile sanei/Makefile \
  backend/Makefile include/Makefile doc/Makefile])
AC_OUTPUT

dnl ***********************************************************************
dnl print configuration information
dnl ***********************************************************************

echo "-> Variables used for compilation/linking:"
echo CPPFLAGS=\"${CPPFLAGS}\"
echo CFLAGS=\"${CFLAGS}\"
echo LDFLAGS=\"${LDFLAGS}\"
echo LIBS=\"${LIBS}\"
echo "-> Installation directories:"
echo "Configuration: `eval eval echo ${sysconfdir}`"
echo "Libraries:     `eval eval echo ${libdir}`"
echo "Binaries:      `eval eval echo ${bindir}` and `eval eval echo ${sbindir}`"
echo "Manpages:      `eval eval echo ${mandir}`"
echo "Documentation: `eval eval echo ${docdir}`"
if eval "test x$INSTALL_LOCKPATH = xinstall-lockpath" ; then
  echo "Lockfiles:     `eval eval echo ${locksanedir}`"
else
  echo "Lockfiles:     Feature is disabled!"
fi
echo "-> Network parameters:"
if test "${SANED}" = "saned" ; then
  echo "Build saned:   yes"
else
  echo "Build saned:   no"
fi
echo "IPv6 support:  `eval eval echo ${ipv6}`"
echo "Avahi support: `eval eval echo ${enable_avahi}`"
echo "SNMP support:  `eval eval echo ${with_snmp}`"
echo "-> The following backends will be built:"
for backend in ${BACKENDS} ; do
  echo $ECHO_N "${backend} " 
done
echo 
echo
echo "-> The following preload backends will be built:"
for backend in ${PRELOADABLE_BACKENDS} ; do
  echo $ECHO_N "${backend} " 
done
echo

if test "$SANE_CONFIG_PATH" != "no" ; then
  SANE_INSTALLED_VERSION=`$SANE_CONFIG_PATH --version`
  SANE_INSTALLED_PREFIX=`$SANE_CONFIG_PATH --prefix`
  if test "$SANE_INSTALLED_PREFIX" != "$prefix" ; then
    echo "*** WARNING: SANE is already installed (version $SANE_INSTALLED_VERSION). The old"
    echo "*** installation is at $SANE_INSTALLED_PREFIX while SANE will now be installed"
    echo "*** at $prefix. It is recommended to uninstall the old SANE version"
    echo "*** before installing the new one to avoid problems."
  fi
else
  if test "$LIBSANE_EXISTS" = "yes" ; then
    echo "*** Warning: An old version of SANE was detected but the sane-config program"
    echo "*** couldn't be found. If you encounter any problems with SANE remove the old"
    echo "*** SANE files and reinstall this version."
  fi
fi
if eval "test x${sysconfdir} = x/usr/etc" ; then
  echo "*** WARNING: Configuration files are stored in /usr/etc. If this is not"
  echo "*** intended, use --sysconfdir to set another path (e.g. "/etc")."
fi
if test "$SELECTED_BACKENDS" != "" ; then
  echo "*** Warning: Local backends have been disabled.  This means that scanners"
  echo "*** connected to your local computer won't be supported.  Only a network"
  echo "*** connection to a remote host is possible."
fi
if test "$enable_libusb" != "no" && test "$HAVE_USB" != "yes" ; then
  echo "*** Warning: sane-backends will be built without libusb support.  There may"
  echo "*** be valid reasons to do so, e.g. if you don't use USB scanners or on"
  echo "*** platforms without libusb support but generally this means that you"
  echo "*** can't use USB devices with SANE. The most probable cause is that"
  if test "${ac_cv_header_usb_h}" != "yes"; then
    echo "*** the libusb header file usb.h is not installed. If you use Linux"
    echo "*** you may need a package called 'libusb-dev', 'libusb-devel' or similar."
  else
    echo "*** libusb is not installed at all or is too old. See README."
  fi
fi

echo "****************************************************************"
echo "* Please be sure to read file PROBLEMS in this directory       *"
echo "* BEFORE running any of the SANE applications.  Some devices   *"
echo "* may be damaged by improper operation, so please do heed this *"
echo "* advice.                                                      *"
echo "****************************************************************"