dnl
dnl Contains the following macros
dnl   SANE_EXTRACT_LDFLAGS(LDFLAGS, LIBS)
dnl   SANE_V4L_VERSION
dnl   SANE_CHECK_PTAL
dnl   SANE_CHECK_JPEG
dnl   JAPHAR_GREP_CFLAGS(flag, cmd_if_missing, cmd_if_present)
dnl   SANE_LINKER_RPATH
dnl   SANE_CHECK_U_TYPES
dnl   SANE_CHECK_GPHOTO2
dnl   AC_PROG_LIBTOOL
dnl

#
# Separate LIBS from LDFLAGS to link correctly on HP/UX (and other
# platforms who care about the order of params to ld.  It removes all
# non '-l..'-params from $2(LIBS), and appends them to $1(LDFLAGS)
#
# Use like this: SANE_EXTRACT_LDFLAGS(LDFLAGS, LIBS)
AC_DEFUN(SANE_EXTRACT_LDFLAGS,
[tmp_LIBS=""
for param in ${$2}; do
  case "${param}" in
    -l*)
         tmp_LIBS="${tmp_LIBS} ${param}"
         ;;
     *)
         $1="${$1} ${param}"
         ;;
  esac
done
$2="${tmp_LIBS}"
unset tmp_LIBS
unset param
])

#
# Test header file <linux/videodev.h> to check if this is Video for
# Linux 1 or 2.  Sets variable sane_v4l_version to 'v4l' or 'v4l2'
# depending on the detected version.
# Test by Petter Reinholdtsen <pere@td.org.uit.no>, 2000-07-07
#
AC_DEFUN(SANE_V4L_VERSION,
[
  AC_CHECK_HEADER(linux/videodev.h)
  if test "${ac_cv_header_linux_videodev_h}" = "yes"
  then
    AC_CACHE_CHECK([Video4Linux version 1 or 2], sane_v4l_version,
    [AC_EGREP_CPP(v4l2_yes,
      [#include <linux/videodev.h>
#ifdef V4L2_MAJOR_VERSION
      v4l2_yes
#endif
      ],[sane_v4l_version=v4l2],

      [sane_v4l_version=v4l]
    )])
  fi
])

#
# Checks for PTAL, needed for MFP support in HP backend.
AC_DEFUN(SANE_CHECK_PTAL,
[
	PTAL_TMP_HAVE_PTAL=no
	AC_ARG_WITH(ptal,
	  [  --with-ptal[=DIR]       specify the top-level PTAL directory 
                          [default=/usr/local]])
	if test "$with_ptal" = "no" ; then
		echo disabling PTAL
	else
		PTAL_OLD_CPPFLAGS=${CPPFLAGS}
		PTAL_OLD_LDFLAGS=${LDFLAGS}

		if test "$with_ptal" = "yes" ; then
			with_ptal=/usr/local
		fi
		CPPFLAGS="${CPPFLAGS} -I$with_ptal/include"
		LDFLAGS="${LDFLAGS} -L$with_ptal/lib"

		AC_CHECK_HEADERS(ptal.h,
			AC_CHECK_LIB(ptal,ptalInit,
				AC_DEFINE(HAVE_PTAL, 1, [Is PTAL available?])
				LDFLAGS="${LDFLAGS} -lptal"
				PTAL_TMP_HAVE_PTAL=yes))

		if test "${PTAL_TMP_HAVE_PTAL}" != "yes" ; then
			CPPFLAGS=${PTAL_OLD_CPPFLAGS}
			LDFLAGS=${PTAL_OLD_LDFLAGS}
		fi
	fi

	unset PTAL_TMP_HAVE_PTAL
	unset PTAL_OLD_CPPFLAGS
	unset PTAL_OLD_LDFLAGS
])

#
# Checks for jpeg library >= v6B (61), needed for DC210,  DC240, and 
# GPHOTO2 backends.
AC_DEFUN(SANE_CHECK_JPEG,
[
  AC_CHECK_LIB(jpeg,jpeg_start_decompress, 
  [
    AC_CHECK_HEADER(jconfig.h, 
    [
      AC_MSG_CHECKING([for jpeglib - version >= 61 (6a)])
      AC_EGREP_CPP(sane_correct_jpeg_lib_version_found,
      [
        #include <jpeglib.h>
        #if JPEG_LIB_VERSION >= 61
          sane_correct_jpeg_lib_version_found
        #endif
      ],[sane_cv_use_libjpeg="yes"; LIBS="${LIBS} -ljpeg"; 
      AC_MSG_RESULT(yes)],[AC_MSG_RESULT(no)])
    ],)
  ],)
])

dnl
dnl JAPHAR_GREP_CFLAGS(flag, cmd_if_missing, cmd_if_present)
dnl
dnl From Japhar.  Report changes to japhar@hungry.com
dnl
AC_DEFUN(JAPHAR_GREP_CFLAGS,
[case "$CFLAGS" in
"$1" | "$1 "* | *" $1" | *" $1 "* )
  ifelse($#, 3, [$3], [:])
  ;;
*)
  $2
  ;;
esac
])

dnl
dnl SANE_LINKER_RPATH
dnl
dnl Detect how to set runtime link path (rpath).  Set variable
dnl LINKER_RPATH.  Typical content will be '-Wl,-rpath,' or '-R '.  If
dnl set, add '${LINKER_RPATH}${libdir}' to $LDFLAGS
dnl

AC_DEFUN(SANE_LINKER_RPATH,
[dnl AC_REQUIRE([AC_SUBST])dnl This line resulted in an empty AC_SUBST() !!
  AC_CACHE_CHECK([linker parameter to set runtime link path], LINKER_RPATH,
    [LINKER_RPATH=
    case "$host_os" in
    linux* | freebsd* | netbsd* | openbsd* | irix*)
      # I believe this only works with GNU ld [pere 2001-04-16]
      LINKER_RPATH="-Wl,-rpath,"
      ;;
    solaris*)
      LINKER_RPATH="-R "
      ;;
    esac
    ])
  AC_SUBST(LINKER_RPATH)dnl
])

dnl
dnl   SANE_CHECK_U_TYPES
dnl
dnl Some of the following  types seem to be defined only in sys/bitypes.h on
dnl some systems (e.g. Tru64 Unix). This is a problem for files that include
dnl sys/bitypes.h indirectly (e.g. net.c). If this is true, we add
dnl sys/bitypes.h to CPPFLAGS.
AC_DEFUN(SANE_CHECK_U_TYPES,
[if test "$ac_cv_header_sys_bitypes_h" = "yes" ; then
  AC_MSG_CHECKING([for u_int8_t only in sys/bitypes.h])
  AC_EGREP_CPP(u_int8_t,
  [
  #include "confdefs.h"
  #include <sys/types.h>
  #if STDC_HEADERS
  #include <stdlib.h>
  #include <stddef.h>
  #endif
  ],[AC_MSG_RESULT([no, also in standard headers])],
    [AC_EGREP_HEADER(u_int8_t,netinet/in.h,
       [AC_DEFINE(NEED_SYS_BITYPES_H, 1, [Do we need <sys/bitypes.h>?])
	AC_MSG_RESULT(yes)],
       [AC_MSG_RESULT([no, not even included with netinet/in.h])])])
fi
AC_CHECK_TYPE(u_int8_t, unsigned char)
AC_CHECK_TYPE(u_int16_t, unsigned short)
AC_CHECK_TYPE(u_int32_t, unsigned int)
AC_CHECK_TYPE(u_char, unsigned char)
AC_CHECK_TYPE(u_int, unsigned int)
AC_CHECK_TYPE(u_long, unsigned long)
])

#
# Checks for gphoto2 libs, needed by gphoto2 backend
AC_DEFUN(SANE_CHECK_GPHOTO2,
[
	AC_ARG_WITH(gphoto2,
	  [  --with-gphoto2          Include the gphoto2 backend],
[
	
	if test "$with_gphoto2" = "no" ; then
		echo disabling GPHOTO2
	else
		AC_CHECK_TOOL(HAVE_GPHOTO2, gphoto2-config, false)
		
		if test "$with_gphoto2" = "yes" ; then
			with_gphoto2=`gphoto2-config --prefix`
		fi
		GPVERSION=`gphoto2-config --version`

		case "$GPVERSION" in 
		    "gphoto2 2.0beta4dev8" | \
		    "gphoto2 2.0beta4dev9" | \
		    "gphoto2 2.0beta5"* | \
		    "gphoto2 2.0beta6"* \
		 ) 
			CPPFLAGS="${CPPFLAGS} `gphoto2-config --cflags`"
			GPHOTO2_LIBS="`gphoto2-config --libs`"
			SANE_EXTRACT_LDFLAGS(LDFLAGS, GPHOTO2_LIBS)
			LIBS="${LIBS} ${GPHOTO2_LIBS}"
			;;
		* ) 
			echo 
			echo "Sorry, can't use GPHOTO2"
			echo "GPHOTO2 APIs have been changing rapidly. Only"
			echo "the current version from CVS is likely to work."
			echo 
			HAVE_GPHOTO2=""
			;;
		esac
])	fi
])


# serial 40 AC_PROG_LIBTOOL
AC_DEFUN(AC_PROG_LIBTOOL,
[AC_REQUIRE([AC_LIBTOOL_SETUP])dnl

# Save cache, so that ltconfig can load it
AC_CACHE_SAVE

# Actually configure libtool.  ac_aux_dir is where install-sh is found.
CC="$CC" CFLAGS="$CFLAGS" CPPFLAGS="$CPPFLAGS" \
LD="$LD" LDFLAGS="$LDFLAGS" LIBS="$LIBS" \
LN_S="$LN_S" NM="$NM" RANLIB="$RANLIB" \
DLLTOOL="$DLLTOOL" AS="$AS" OBJDUMP="$OBJDUMP" \
${CONFIG_SHELL-/bin/sh} $ac_aux_dir/ltconfig --no-reexec \
$libtool_flags --no-verify $ac_aux_dir/ltmain.sh $lt_target \
|| AC_MSG_ERROR([libtool configure failed])

# Reload cache, that may have been modified by ltconfig
AC_CACHE_LOAD

# This can be used to rebuild libtool when needed
LIBTOOL_DEPS="$ac_aux_dir/ltconfig $ac_aux_dir/ltmain.sh"

# Always use our own libtool.
LIBTOOL='$(SHELL) $(top_builddir)/libtool'
AC_SUBST(LIBTOOL)dnl

# Redirect the config.log output again, so that the ltconfig log is not
# clobbered by the next message.
exec 5>>./config.log
])

AC_DEFUN(AC_LIBTOOL_SETUP,
[AC_PREREQ(2.13)dnl
AC_REQUIRE([AC_ENABLE_SHARED])dnl
AC_REQUIRE([AC_ENABLE_STATIC])dnl
AC_REQUIRE([AC_ENABLE_FAST_INSTALL])dnl
AC_REQUIRE([AC_CANONICAL_HOST])dnl
AC_REQUIRE([AC_CANONICAL_BUILD])dnl
AC_REQUIRE([AC_PROG_RANLIB])dnl
AC_REQUIRE([AC_PROG_CC])dnl
AC_REQUIRE([AC_PROG_LD])dnl
AC_REQUIRE([AC_PROG_NM])dnl
AC_REQUIRE([AC_PROG_LN_S])dnl
dnl

case "$target" in
NONE) lt_target="$host" ;;
*) lt_target="$target" ;;
esac

# Check for any special flags to pass to ltconfig.
#
# the following will cause an existing older ltconfig to fail, so
# we ignore this at the expense of the cache file... Checking this 
# will just take longer ... bummer!
#libtool_flags="--cache-file=$cache_file"
#
test "$enable_shared" = no && libtool_flags="$libtool_flags --disable-shared"
test "$enable_static" = no && libtool_flags="$libtool_flags --disable-static"
test "$enable_fast_install" = no && libtool_flags="$libtool_flags --disable-fast-install"
test "$ac_cv_prog_gcc" = yes && libtool_flags="$libtool_flags --with-gcc"
test "$ac_cv_prog_gnu_ld" = yes && libtool_flags="$libtool_flags --with-gnu-ld"
ifdef([AC_PROVIDE_AC_LIBTOOL_DLOPEN],
[libtool_flags="$libtool_flags --enable-dlopen"])
ifdef([AC_PROVIDE_AC_LIBTOOL_WIN32_DLL],
[libtool_flags="$libtool_flags --enable-win32-dll"])
AC_ARG_ENABLE(libtool-lock,
  [  --disable-libtool-lock  avoid locking (might break parallel builds)])
test "x$enable_libtool_lock" = xno && libtool_flags="$libtool_flags --disable-lock"
test x"$silent" = xyes && libtool_flags="$libtool_flags --silent"

# Some flags need to be propagated to the compiler or linker for good
# libtool support.
case "$lt_target" in
*-*-irix6*)
  # Find out which ABI we are using.
  echo '[#]line __oline__ "configure"' > conftest.$ac_ext
  if AC_TRY_EVAL(ac_compile); then
    case "`/usr/bin/file conftest.o`" in
    *32-bit*)
      LD="${LD-ld} -32"
      ;;
    *N32*)
      LD="${LD-ld} -n32"
      ;;
    *64-bit*)
      LD="${LD-ld} -64"
      ;;
    esac
  fi
  rm -rf conftest*
  ;;

*-*-sco3.2v5*)
  # On SCO OpenServer 5, we need -belf to get full-featured binaries.
  SAVE_CFLAGS="$CFLAGS"
  CFLAGS="$CFLAGS -belf"
  AC_CACHE_CHECK([whether the C compiler needs -belf], lt_cv_cc_needs_belf,
    [AC_TRY_LINK([],[],[lt_cv_cc_needs_belf=yes],[lt_cv_cc_needs_belf=no])])
  if test x"$lt_cv_cc_needs_belf" != x"yes"; then
    # this is probably gcc 2.8.0, egcs 1.0 or newer; no need for -belf
    CFLAGS="$SAVE_CFLAGS"
  fi
  ;;

ifdef([AC_PROVIDE_AC_LIBTOOL_WIN32_DLL],
[*-*-cygwin* | *-*-mingw*)
  AC_CHECK_TOOL(DLLTOOL, dlltool, false)
  AC_CHECK_TOOL(AS, as, false)
  AC_CHECK_TOOL(OBJDUMP, objdump, false)
  ;;
])
esac
])

# AC_LIBTOOL_DLOPEN - enable checks for dlopen support
AC_DEFUN(AC_LIBTOOL_DLOPEN, [AC_BEFORE([$0],[AC_LIBTOOL_SETUP])])

# AC_LIBTOOL_WIN32_DLL - declare package support for building win32 dll's
AC_DEFUN(AC_LIBTOOL_WIN32_DLL, [AC_BEFORE([$0], [AC_LIBTOOL_SETUP])])

# AC_ENABLE_SHARED - implement the --enable-shared flag
# Usage: AC_ENABLE_SHARED[(DEFAULT)]
#   Where DEFAULT is either `yes' or `no'.  If omitted, it defaults to
#   `yes'.
AC_DEFUN(AC_ENABLE_SHARED, [dnl
define([AC_ENABLE_SHARED_DEFAULT], ifelse($1, no, no, yes))dnl
AC_ARG_ENABLE(shared,
changequote(<<, >>)dnl
<<  --enable-shared[=PKGS]  build shared libraries [default=>>AC_ENABLE_SHARED_DEFAULT],
changequote([, ])dnl
[p=${PACKAGE-default}
case "$enableval" in
yes) enable_shared=yes ;;
no) enable_shared=no ;;
*)
  enable_shared=no
  # Look at the argument we got.  We use all the common list separators.
  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
  for pkg in $enableval; do
    if test "X$pkg" = "X$p"; then
      enable_shared=yes
    fi
  done
  IFS="$ac_save_ifs"
  ;;
esac],
enable_shared=AC_ENABLE_SHARED_DEFAULT)dnl
])

# AC_DISABLE_SHARED - set the default shared flag to --disable-shared
AC_DEFUN(AC_DISABLE_SHARED, [AC_BEFORE([$0],[AC_LIBTOOL_SETUP])dnl
AC_ENABLE_SHARED(no)])

# AC_ENABLE_STATIC - implement the --enable-static flag
# Usage: AC_ENABLE_STATIC[(DEFAULT)]
#   Where DEFAULT is either `yes' or `no'.  If omitted, it defaults to
#   `yes'.
AC_DEFUN(AC_ENABLE_STATIC, [dnl
define([AC_ENABLE_STATIC_DEFAULT], ifelse($1, no, no, yes))dnl
AC_ARG_ENABLE(static,
changequote(<<, >>)dnl
<<  --enable-static[=PKGS]  build static libraries [default=>>AC_ENABLE_STATIC_DEFAULT],
changequote([, ])dnl
[p=${PACKAGE-default}
case "$enableval" in
yes) enable_static=yes ;;
no) enable_static=no ;;
*)
  enable_static=no
  # Look at the argument we got.  We use all the common list separators.
  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
  for pkg in $enableval; do
    if test "X$pkg" = "X$p"; then
      enable_static=yes
    fi
  done
  IFS="$ac_save_ifs"
  ;;
esac],
enable_static=AC_ENABLE_STATIC_DEFAULT)dnl
])

# AC_DISABLE_STATIC - set the default static flag to --disable-static
AC_DEFUN(AC_DISABLE_STATIC, [AC_BEFORE([$0],[AC_LIBTOOL_SETUP])dnl
AC_ENABLE_STATIC(no)])


# AC_ENABLE_FAST_INSTALL - implement the --enable-fast-install flag
# Usage: AC_ENABLE_FAST_INSTALL[(DEFAULT)]
#   Where DEFAULT is either `yes' or `no'.  If omitted, it defaults to
#   `yes'.
AC_DEFUN(AC_ENABLE_FAST_INSTALL, [dnl
define([AC_ENABLE_FAST_INSTALL_DEFAULT], ifelse($1, no, no, yes))dnl
AC_ARG_ENABLE(fast-install,
changequote(<<, >>)dnl
<<  --enable-fast-install[=PKGS]  optimize for fast installation [default=>>AC_ENABLE_FAST_INSTALL_DEFAULT],
changequote([, ])dnl
[p=${PACKAGE-default}
case "$enableval" in
yes) enable_fast_install=yes ;;
no) enable_fast_install=no ;;
*)
  enable_fast_install=no
  # Look at the argument we got.  We use all the common list separators.
  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
  for pkg in $enableval; do
    if test "X$pkg" = "X$p"; then
      enable_fast_install=yes
    fi
  done
  IFS="$ac_save_ifs"
  ;;
esac],
enable_fast_install=AC_ENABLE_FAST_INSTALL_DEFAULT)dnl
])

# AC_ENABLE_FAST_INSTALL - set the default to --disable-fast-install
AC_DEFUN(AC_DISABLE_FAST_INSTALL, [AC_BEFORE([$0],[AC_LIBTOOL_SETUP])dnl
AC_ENABLE_FAST_INSTALL(no)])

# AC_PROG_LD - find the path to the GNU or non-GNU linker
AC_DEFUN(AC_PROG_LD,
[AC_ARG_WITH(gnu-ld,
[  --with-gnu-ld           assume the C compiler uses GNU ld [default=no]],
test "$withval" = no || with_gnu_ld=yes, with_gnu_ld=no)
AC_REQUIRE([AC_PROG_CC])dnl
AC_REQUIRE([AC_CANONICAL_HOST])dnl
AC_REQUIRE([AC_CANONICAL_BUILD])dnl
ac_prog=ld
if test "$ac_cv_prog_gcc" = yes; then
  # Check if gcc -print-prog-name=ld gives a path.
  AC_MSG_CHECKING([for ld used by GCC])
  ac_prog=`($CC -print-prog-name=ld) 2>&5`
  case "$ac_prog" in
    # Accept absolute paths.
changequote(,)dnl
    [\\/]* | [A-Za-z]:[\\/]*)
      re_direlt='/[^/][^/]*/\.\./'
changequote([,])dnl
      # Canonicalize the path of ld
      ac_prog=`echo $ac_prog| sed 's%\\\\%/%g'`
      while echo $ac_prog | grep "$re_direlt" > /dev/null 2>&1; do
	ac_prog=`echo $ac_prog| sed "s%$re_direlt%/%"`
      done
      test -z "$LD" && LD="$ac_prog"
      ;;
  "")
    # If it fails, then pretend we aren't using GCC.
    ac_prog=ld
    ;;
  *)
    # If it is relative, then search for the first ld in PATH.
    with_gnu_ld=unknown
    ;;
  esac
elif test "$with_gnu_ld" = yes; then
  AC_MSG_CHECKING([for GNU ld])
else
  AC_MSG_CHECKING([for non-GNU ld])
fi
AC_CACHE_VAL(ac_cv_path_LD,
[if test -z "$LD"; then
  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}${PATH_SEPARATOR-:}"
  for ac_dir in $PATH; do
    test -z "$ac_dir" && ac_dir=.
    if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then
      ac_cv_path_LD="$ac_dir/$ac_prog"
      # Check to see if the program is GNU ld.  I'd rather use --version,
      # but apparently some GNU ld's only accept -v.
      # Break only if it was the GNU/non-GNU ld that we prefer.
      if "$ac_cv_path_LD" -v 2>&1 < /dev/null | egrep '(GNU|with BFD)' > /dev/null; then
	test "$with_gnu_ld" != no && break
      else
	test "$with_gnu_ld" != yes && break
      fi
    fi
  done
  IFS="$ac_save_ifs"
else
  ac_cv_path_LD="$LD" # Let the user override the test with a path.
fi])
LD="$ac_cv_path_LD"
if test -n "$LD"; then
  AC_MSG_RESULT($LD)
else
  AC_MSG_RESULT(no)
fi
test -z "$LD" && AC_MSG_ERROR([no acceptable ld found in \$PATH])
AC_PROG_LD_GNU
])

AC_DEFUN(AC_PROG_LD_GNU,
[AC_CACHE_CHECK([if the linker ($LD) is GNU ld], ac_cv_prog_gnu_ld,
[# I'd rather use --version here, but apparently some GNU ld's only accept -v.
if $LD -v 2>&1 </dev/null | egrep '(GNU|with BFD)' 1>&5; then
  ac_cv_prog_gnu_ld=yes
else
  ac_cv_prog_gnu_ld=no
fi])
])

# AC_PROG_NM - find the path to a BSD-compatible name lister
AC_DEFUN(AC_PROG_NM,
[AC_MSG_CHECKING([for BSD-compatible nm])
AC_CACHE_VAL(ac_cv_path_NM,
[if test -n "$NM"; then
  # Let the user override the test.
  ac_cv_path_NM="$NM"
else
  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}${PATH_SEPARATOR-:}"
  for ac_dir in $PATH /usr/ccs/bin /usr/ucb /bin; do
    test -z "$ac_dir" && ac_dir=.
    if test -f $ac_dir/nm || test -f $ac_dir/nm$ac_exeext ; then
      # Check to see if the nm accepts a BSD-compat flag.
      # Adding the `sed 1q' prevents false positives on HP-UX, which says:
      #   nm: unknown option "B" ignored
      if ($ac_dir/nm -B /dev/null 2>&1 | sed '1q'; exit 0) | egrep /dev/null >/dev/null; then
	ac_cv_path_NM="$ac_dir/nm -B"
	break
      elif ($ac_dir/nm -p /dev/null 2>&1 | sed '1q'; exit 0) | egrep /dev/null >/dev/null; then
	ac_cv_path_NM="$ac_dir/nm -p"
	break
      else
	ac_cv_path_NM=${ac_cv_path_NM="$ac_dir/nm"} # keep the first match, but
	continue # so that we can try to find one that supports BSD flags
      fi
    fi
  done
  IFS="$ac_save_ifs"
  test -z "$ac_cv_path_NM" && ac_cv_path_NM=nm
fi])
NM="$ac_cv_path_NM"
AC_MSG_RESULT([$NM])
])

# AC_CHECK_LIBM - check for math library
AC_DEFUN(AC_CHECK_LIBM,
[AC_REQUIRE([AC_CANONICAL_HOST])dnl
LIBM=
case "$lt_target" in
*-*-beos* | *-*-cygwin*)
  # These system don't have libm
  ;;
*-ncr-sysv4.3*)
  AC_CHECK_LIB(mw, _mwvalidcheckl, LIBM="-lmw")
  AC_CHECK_LIB(m, main, LIBM="$LIBM -lm")
  ;;
*)
  AC_CHECK_LIB(m, main, LIBM="-lm")
  ;;
esac
])

# AC_LIBLTDL_CONVENIENCE[(dir)] - sets LIBLTDL to the link flags for
# the libltdl convenience library and INCLTDL to the include flags for
# the libltdl header and adds --enable-ltdl-convenience to the
# configure arguments.  Note that LIBLTDL and INCLTDL are not
# AC_SUBSTed, nor is AC_CONFIG_SUBDIRS called.  If DIR is not
# provided, it is assumed to be `libltdl'.  LIBLTDL will be prefixed
# with '${top_builddir}/' and INCLTDL will be prefixed with
# '${top_srcdir}/' (note the single quotes!).  If your package is not
# flat and you're not using automake, define top_builddir and
# top_srcdir appropriately in the Makefiles.
AC_DEFUN(AC_LIBLTDL_CONVENIENCE, [AC_BEFORE([$0],[AC_LIBTOOL_SETUP])dnl
  case "$enable_ltdl_convenience" in
  no) AC_MSG_ERROR([this package needs a convenience libltdl]) ;;
  "") enable_ltdl_convenience=yes
      ac_configure_args="$ac_configure_args --enable-ltdl-convenience" ;;
  esac
  LIBLTDL='${top_builddir}/'ifelse($#,1,[$1],['libltdl'])/libltdlc.la
  INCLTDL='-I${top_srcdir}/'ifelse($#,1,[$1],['libltdl'])
])

# AC_LIBLTDL_INSTALLABLE[(dir)] - sets LIBLTDL to the link flags for
# the libltdl installable library and INCLTDL to the include flags for
# the libltdl header and adds --enable-ltdl-install to the configure
# arguments.  Note that LIBLTDL and INCLTDL are not AC_SUBSTed, nor is
# AC_CONFIG_SUBDIRS called.  If DIR is not provided and an installed
# libltdl is not found, it is assumed to be `libltdl'.  LIBLTDL will
# be prefixed with '${top_builddir}/' and INCLTDL will be prefixed
# with '${top_srcdir}/' (note the single quotes!).  If your package is
# not flat and you're not using automake, define top_builddir and
# top_srcdir appropriately in the Makefiles.
# In the future, this macro may have to be called after AC_PROG_LIBTOOL.
AC_DEFUN(AC_LIBLTDL_INSTALLABLE, [AC_BEFORE([$0],[AC_LIBTOOL_SETUP])dnl
  AC_CHECK_LIB(ltdl, main,
  [test x"$enable_ltdl_install" != xyes && enable_ltdl_install=no],
  [if test x"$enable_ltdl_install" = xno; then
     AC_MSG_WARN([libltdl not installed, but installation disabled])
   else
     enable_ltdl_install=yes
   fi
  ])
  if test x"$enable_ltdl_install" = x"yes"; then
    ac_configure_args="$ac_configure_args --enable-ltdl-install"
    LIBLTDL='${top_builddir}/'ifelse($#,1,[$1],['libltdl'])/libltdl.la
    INCLTDL='-I${top_srcdir}/'ifelse($#,1,[$1],['libltdl'])
  else
    ac_configure_args="$ac_configure_args --enable-ltdl-install=no"
    LIBLTDL="-lltdl"
    INCLTDL=
  fi
])

dnl old names
AC_DEFUN(AM_PROG_LIBTOOL, [indir([AC_PROG_LIBTOOL])])dnl
AC_DEFUN(AM_ENABLE_SHARED, [indir([AC_ENABLE_SHARED], $@)])dnl
AC_DEFUN(AM_ENABLE_STATIC, [indir([AC_ENABLE_STATIC], $@)])dnl
AC_DEFUN(AM_DISABLE_SHARED, [indir([AC_DISABLE_SHARED], $@)])dnl
AC_DEFUN(AM_DISABLE_STATIC, [indir([AC_DISABLE_STATIC], $@)])dnl
AC_DEFUN(AM_PROG_LD, [indir([AC_PROG_LD])])dnl
AC_DEFUN(AM_PROG_NM, [indir([AC_PROG_NM])])dnl

dnl This is just to silence aclocal about the macro not being used
ifelse([AC_DISABLE_FAST_INSTALL])dnl


# serial 1

# @defmac AC_PROG_CC_STDC
# @maindex PROG_CC_STDC
# @ovindex CC
# If the C compiler in not in ANSI C mode by default, try to add an option
# to output variable @code{CC} to make it so.  This macro tries various
# options that select ANSI C on some system or another.  It considers the
# compiler to be in ANSI C mode if it handles function prototypes correctly.
#
# If you use this macro, you should check after calling it whether the C
# compiler has been set to accept ANSI C; if not, the shell variable
# @code{am_cv_prog_cc_stdc} is set to @samp{no}.  If you wrote your source
# code in ANSI C, you can make an un-ANSIfied copy of it by using the
# program @code{ansi2knr}, which comes with Ghostscript.
# @end defmac

AC_DEFUN(AM_PROG_CC_STDC,
[AC_REQUIRE([AC_PROG_CC])
AC_BEFORE([$0], [AC_C_INLINE])
AC_BEFORE([$0], [AC_C_CONST])
dnl Force this before AC_PROG_CPP.  Some cpp's, eg on HPUX, require
dnl a magic option to avoid problems with ANSI preprocessor commands
dnl like #elif.
dnl FIXME: can't do this because then AC_AIX won't work due to a
dnl circular dependency.
dnl AC_BEFORE([$0], [AC_PROG_CPP])
AC_MSG_CHECKING(for ${CC-cc} option to accept ANSI C)
AC_CACHE_VAL(am_cv_prog_cc_stdc,
[am_cv_prog_cc_stdc=no
ac_save_CC="$CC"
# Don't try gcc -ansi; that turns off useful extensions and
# breaks some systems' header files.
# AIX			-qlanglvl=ansi
# Ultrix and OSF/1	-std1
# HP-UX			-Aa -D_HPUX_SOURCE
# SVR4			-Xc -D__EXTENSIONS__
for ac_arg in "" -qlanglvl=ansi -std1 "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__"
do
  CC="$ac_save_CC $ac_arg"
  AC_TRY_COMPILE(
[#include <stdarg.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
/* Most of the following tests are stolen from RCS 5.7's src/conf.sh.  */
struct buf { int x; };
FILE * (*rcsopen) (struct buf *, struct stat *, int);
static char *e (p, i)
     char **p;
     int i;
{
  return p[i];
}
static char *f (char * (*g) (char **, int), char **p, ...)
{
  char *s;
  va_list v;
  va_start (v,p);
  s = g (p, va_arg (v,int));
  va_end (v);
  return s;
}
int test (int i, double x);
struct s1 {int (*f) (int a);};
struct s2 {int (*f) (double a);};
int pairnames (int, char **, FILE *(*)(struct buf *, struct stat *, int), int, int);
int argc;
char **argv;
], [
return f (e, argv, 0) != argv[0]  ||  f (e, argv, 1) != argv[1];
],
[am_cv_prog_cc_stdc="$ac_arg"; break])
done
CC="$ac_save_CC"
])
if test -z "$am_cv_prog_cc_stdc"; then
  AC_MSG_RESULT([none needed])
else
  AC_MSG_RESULT($am_cv_prog_cc_stdc)
fi
case "x$am_cv_prog_cc_stdc" in
  x|xno) ;;
  *) CC="$CC $am_cv_prog_cc_stdc" ;;
esac
])