diff -r 27e940e8e5f3 -r d64aaa7d146f aclocal.m4
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/aclocal.m4	Fri Nov 28 11:21:08 2008 +0100
@@ -0,0 +1,657 @@
+##
+##  OSSP asgui - Accounting system graphical user interface
+##  Copyright (c) 2002-2004 The OSSP Project (http://www.ossp.org/)
+##  Copyright (c) 2002-2004 Ralf S. Engelschall <rse@engelschall.com>
+##  Copyright (c) 2002-2004 Michael Schloh von Bennewitz <michael@schloh.com>
+##  Copyright (c) 2002-2004 Cable & Wireless Telecommunications Services GmbH
+##
+##  This file is part of OSSP GUI, a graphical user interface
+##  for OSSP which can be found at http://www.ossp.org/
+##
+##  Permission to use, copy, modify, and distribute this software for
+##  any purpose with or without fee is hereby granted, provided that
+##  the above copyright notice and this permission notice appear in all
+##  copies.
+##
+##  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
+##  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+##  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+##  IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR
+##  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+##  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+##  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+##  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+##  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+##  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+##  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+##  SUCH DAMAGE.
+##
+##  aclocal.m4: Autoconf M4 macros
+##
+
+
+dnl ##
+dnl ##  Look for SIOCGIFHWADDR
+dnl ##
+
+AC_DEFUN(AC_CHECK_SIOCGIFHWADDR,[
+AC_MSG_CHECKING(whether <sys/ioctl.h> has SIOCGIFHWADDR)
+AC_TRY_COMPILE([#include <sys/sockio.h>
+#include <sys/ioctl.h>
+], [
+  int i = SIOCGIFHWADDR;
+  return 0;],
+    AC_DEFINE(HAVE_SIOCGIFHWADDR, 1, [Define to 1 if <sys/ioctl.h> defines or includes SIOCGIFHWADDR.]),
+    AC_MSG_RESULT([no]),
+    AC_MSG_RESULT([yes]))
+])dnl
+
+
+dnl ##
+dnl ##  Look for SIOCGIFCONF
+dnl ##
+
+AC_DEFUN(AC_CHECK_SIOCGIFCONF,[
+AC_MSG_CHECKING(whether <sys/ioctl.h> has SIOCGIFCONF)
+AC_TRY_COMPILE([#include <sys/sockio.h>
+#include <sys/ioctl.h>
+], [
+  int i = SIOCGIFCONF;
+  return 0;],
+    AC_DEFINE(HAVE_SIOCGIFCONF, 1, [Define to 1 if <sys/ioctl.h> defines or includes SIOCGIFCONF.]),
+    AC_MSG_RESULT([no]),
+    AC_MSG_RESULT([yes]))
+])dnl
+
+
+dnl ##
+dnl ##  Look for SIOGHWADDR
+dnl ##
+
+AC_DEFUN(AC_CHECK_SIOGHWADDR,[
+AC_MSG_CHECKING(whether <sys/ioctl.h> has SIOGHWADDR)
+AC_TRY_COMPILE([#include <sys/sockio.h>
+#include <sys/ioctl.h>
+], [
+  int i = SIOGHWADDR;
+  return 0;],
+    AC_DEFINE(HAVE_SIOGHWADDR, 1, [Define to 1 if <sys/ioctl.h> defines or includes SIOGHWADDR.]),
+    AC_MSG_RESULT([no]),
+    AC_MSG_RESULT([yes]))
+])dnl
+
+
+dnl ##
+dnl ##  Look for SIOCGENADDR
+dnl ##
+
+AC_DEFUN(AC_CHECK_SIOCGENADDR,[
+AC_MSG_CHECKING(whether <sys/ioctl.h> has SIOCGENADDR)
+AC_TRY_COMPILE([#include <sys/sockio.h>
+#include <sys/ioctl.h>
+], [
+  int i = SIOCGENADDR;
+  return 0;],
+    AC_DEFINE(HAVE_SIOCGENADDR, 1, [Define to 1 if <sys/ioctl.h> defines or includes SIOCGENADDR.]),
+    AC_MSG_RESULT([no]),
+    AC_MSG_RESULT([yes]))
+])dnl
+
+
+dnl ##
+dnl ##  Check for sa_len member of the sockaddr
+dnl ##  structure found in BSD systems
+dnl ##
+dnl ##  configure.in:
+dnl ##    AC_STRUCT_SA_LEN
+dnl ##
+
+AC_DEFUN(AC_STRUCT_SA_LEN,
+[AC_CACHE_CHECK([for sa_len in struct sockaddr], ac_cv_struct_sa_len,
+[AC_TRY_COMPILE([
+    #include <sys/types.h>
+    #include <sys/socket.h>
+],
+[
+    struct sockaddr s;
+    s.sa_len;
+],
+ac_cv_struct_sa_len=yes, ac_cv_struct_sa_len=no)])
+if test $ac_cv_struct_sa_len = yes; then
+AC_DEFINE(HAVE_SA_LEN, 1, [Define to 1 if your sockaddr has a sa_len member.])
+fi
+])
+
+
+dnl ##
+dnl ##  Support for Platform IDs
+dnl ##
+dnl ##  configure.in:
+dnl ##    AC_PLATFORM(<variable>)
+dnl ##
+
+AC_DEFUN(AC_PLATFORM,[
+if test ".$host" != .NONE && test ".$host" != .; then
+    $1="$host"
+else
+    $1=`${CONFIG_SHELL-/bin/sh} $srcdir/config.guess`
+fi
+$1=`${CONFIG_SHELL-/bin/sh} $srcdir/config.sub $$1` || exit 1
+AC_SUBST($1)
+if test ".$enable_subdir" != .yes; then
+    echo "Platform: ${TB}${$1}${TN}"
+fi
+])dnl
+
+
+dnl ##
+dnl ##  Support for Configuration Headers
+dnl ##
+dnl ##  configure.in:
+dnl ##    AC_HEADLINE(<short-name>, <long-name>,
+dnl ##                <vers-var>, <vers-file>,
+dnl ##                <copyright>)
+dnl ##
+
+AC_DEFUN(AC_HEADLINE,[dnl
+#   configuration header
+if test ".`echo dummy [$]@ | grep help`" = .; then
+    #   bootstrapping shtool
+    ac_prog=[$]0
+changequote(, )dnl
+    ac_srcdir=`echo $ac_prog | sed -e 's%/[^/][^/]*$%%' -e 's%\([^/]\)/*$%\1%'`
+changequote([, ])dnl
+    test ".$ac_srcdir" = ".$ac_prog" && ac_srcdir=.
+    ac_shtool="$ac_srcdir/shtool"
+
+    #   find out terminal sequences
+    TB=`$ac_shtool echo -n -e %B 2>/dev/null`
+    TN=`$ac_shtool echo -n -e %b 2>/dev/null`
+
+    #   find out package version
+    $3_STR="`$ac_shtool version -l c -d long $ac_srcdir/$4`"
+    AC_SUBST($3_STR)
+
+    #   friendly header ;)
+    if test ".$enable_headline" != .no; then
+        echo "Configuring ${TB}$1${TN} ($2), Version ${TB}${$3_STR}${TN}"
+        echo "$5"
+    fi
+
+    #   additionally find out hex version
+    $3_HEX="`$ac_shtool version -l c -d hex $ac_srcdir/$4`"
+    AC_SUBST($3_HEX)
+fi
+])dnl
+
+
+dnl ##
+dnl ##  Check whether compiler option works
+dnl ##
+dnl ##  configure.in:
+dnl ##    AC_COMPILER_OPTION(<name>, <display>, <option>,
+dnl ##                       <action-success>, <action-failure>)
+dnl ##
+
+AC_DEFUN(AC_COMPILER_OPTION,[dnl
+AC_MSG_CHECKING(whether compiler option(s) $2 work)
+AC_CACHE_VAL(ac_cv_compiler_option_$1,[
+SAVE_CXXFLAGS="$CXXFLAGS"
+CXXFLAGS="$CXXFLAGS $3"
+AC_LANG(C++)
+AC_TRY_COMPILE([],[], ac_cv_compiler_option_$1=yes, ac_cv_compiler_option_$1=no)
+CXXFLAGS="$SAVE_CXXFLAGS"
+])dnl
+if test ".$ac_cv_compiler_option_$1" = .yes; then
+    ifelse([$4], , :, [$4])
+else
+    ifelse([$5], , :, [$5])
+fi
+AC_MSG_RESULT([$ac_cv_compiler_option_$1])
+])dnl
+
+
+dnl ##
+dnl ##  Test for the presence of the MICO ORB
+dnl ##
+dnl ##  configure.in:
+dnl ##    AC_TEST_MICO
+dnl ##
+
+AC_DEFUN(AC_TEST_MICO,[dnl
+AC_ARG_WITH(mico,dnl
+[  --with-mico=[DIR]    prefix where MICO is installed], micodir=$withval,)
+if test $micodir; then
+AC_MSG_CHECKING(the MICO installation path)
+
+dnl ## Ensure that we have a basic path to start searching
+if test -x "$micodir";
+then
+    CORBABASE=$micodir
+    AC_MSG_RESULT(${CORBABASE})
+elif test -x "${MICODIR}";
+then
+    CORBABASE="${MICODIR}"
+    AC_MSG_RESULT(${CORBABASE})
+else
+    AC_MSG_RESULT(not found)
+    AC_MSG_ERROR([Neither \$MICODIR nor --with-mico=[DIR] paths exist])
+fi
+
+dnl ## Append paths of libs and headers
+LIBS="$LIBS -lmico -lmicocoss -lssl -lcrypto"
+LDFLAGS="$LDFLAGS -L${CORBABASE}/lib"
+CPPFLAGS="$CPPFLAGS -I${CORBABASE}/include"
+CXXCPP="$CXXCPP -I${CORBABASE}/include"
+CXXFLAGS="$CXXFLAGS"
+AC_DEFINE(HAVE_MICO, 1, [Define to 1 if building with the MICO ORB.])
+fi
+])
+
+
+dnl ##
+dnl ##  Test for the presence of EasySOAP
+dnl ##
+dnl ##  configure.in:
+dnl ##    AC_TEST_ESOAP
+dnl ##
+
+AC_DEFUN(AC_TEST_ESOAP,[dnl
+AC_ARG_WITH(esoap,dnl
+[  --with-easysoap=[DIR]    prefix where EasySOAP is installed], esoapdir=$withval,)
+if test $esoapdir; then
+AC_MSG_CHECKING(the EasySOAP installation path)
+
+dnl ## Ensure that we have a basic path to start searching
+if test -x "$esoapdir";
+then
+    SOAPBASE=$esoapdir
+    AC_MSG_RESULT(${SOAPBASE})
+elif test -x "${ESOAPDIR}";
+then
+    SOAPBASE="${ESOAPDIR}"
+    AC_MSG_RESULT(${SOAPBASE})
+else
+    AC_MSG_RESULT(not found)
+    AC_MSG_ERROR([Neither \$ESOAPDIR nor --with-easysoap=[DIR] paths exist])
+fi
+
+dnl ## Append paths of libs and headers
+LIBS="$LIBS -leasysoap -lexpat -lssl -lcrypto"
+LDFLAGS="$LDFLAGS -L${SOAPBASE}/lib"
+CPPFLAGS="$CPPFLAGS -I${SOAPBASE}/include"
+CXXCPP="$CXXCPP -I${SOAPBASE}/include"
+CXXFLAGS="$CXXFLAGS"
+AC_DEFINE(HAVE_ESOAP, 1, [Define to 1 if building with EasySOAP.])
+fi
+])
+
+
+dnl ##
+dnl ##  Check the Qt implementation path
+dnl ##
+dnl ##  configure.in:
+dnl ##    AC_CHECK_QT
+dnl ##
+
+AC_DEFUN(AC_CHECK_QT,[dnl
+AC_ARG_WITH(qt,dnl
+[  --with-qt=[DIR]    prefix where Qt is installed], qtdir=$withval,)
+AC_MSG_CHECKING(the Qt installation path)
+
+dnl ## Ensure that we have a basic path to start searching
+if test -x "$qtdir";
+then
+    QTBASE=$qtdir
+    AC_MSG_RESULT(${QTBASE})
+elif test -x "${QTDIR}";
+then
+    QTBASE="${QTDIR}"
+    AC_MSG_RESULT(${QTBASE})
+else
+    AC_MSG_RESULT(not found)
+    AC_MSG_ERROR([Neither \$QTDIR nor --with-qt=[DIR] paths exist])
+fi
+
+dnl ## Now search for libs and headers
+changequote(, )dnl
+for file in x `find $QTBASE/include -name "qapplication.h" -print`; do
+    test .$file = .x && continue
+    c_dir=`echo $file | sed -e 's;[^/]*$;;' -e 's;\(.\)/$;\1;'`
+done
+
+dnl ## Scan to find out which Qt library to link against
+dnl ## FIXME Merge static and dynamic library search blocks
+dnl ## FIXME Remove this qt-mt check and do --enable-threads instead
+for file in x `find $QTBASE/lib -name "libqt.so" -print`; do
+    test .$file = .x && continue
+    l_dir=`echo $file | sed -e 's;[^/]*$;;' -e 's;\(.\)/$;\1;'`
+    lib=`echo $file | sed -e 's;^.*/\(.*\)$;\1;' -e 's;lib\(.*\)\.so;\1;'`
+done
+
+dnl ## If we have a multithreaded shared library, then it's better
+for file in x `find $QTBASE/lib -name "libqt-mt.so" -print`; do
+    test .$file = .x && continue
+    l_dir=`echo $file | sed -e 's;[^/]*$;;' -e 's;\(.\)/$;\1;'`
+    lib=`echo $file | sed -e 's;^.*/\(.*\)$;\1;' -e 's;lib\(.*\)\.so;\1;'`
+done
+
+dnl ## If we have static libraries, then prefer to use those
+for file in x `find $QTBASE/lib -name "libqt.a" -print`; do
+    test .$file = .x && continue
+    l_dir=`echo $file | sed -e 's;[^/]*$;;' -e 's;\(.\)/$;\1;'`
+    lib=`echo $file | sed -e 's;^.*/\(.*\)$;\1;' -e 's;lib\(.*\)\.a;\1;'`
+done
+
+dnl ## But the static multithreaded library is preferred above all
+for file in x `find $QTBASE/lib -name "libqt-mt.a" -print`; do
+    test .$file = .x && continue
+    l_dir=`echo $file | sed -e 's;[^/]*$;;' -e 's;\(.\)/$;\1;'`
+    lib=`echo $file | sed -e 's;^.*/\(.*\)$;\1;' -e 's;lib\(.*\)\.a;\1;'`
+done
+changequote([, ])dnl
+
+dnl ## Append paths of libs and headers
+if test ".$lib" != .; then
+    LIBS="$LIBS -l$lib"
+fi
+LDFLAGS="$LDFLAGS -L$l_dir"
+CPPFLAGS="$CPPFLAGS -DQT_THREAD_SUPPORT"
+CXXCPP="$CXXCPP -DQT_THREAD_SUPPORT"
+CXXFLAGS="$CXXFLAGS -I$c_dir"
+])
+
+
+dnl ##
+dnl ##  UIC check, should come after the Qt check
+dnl ##
+dnl ##  configure.in:
+dnl ##    AC_CHECK_UIC
+dnl ##
+
+AC_DEFUN(AC_CHECK_UIC,[dnl
+AC_MSG_CHECKING(UIC location)
+if test -x ${QTBASE}/bin/uic
+then
+    UIC=${QTBASE}/bin/uic
+    AC_MSG_RESULT(${QTBASE}/bin/uic)
+else
+    UIC=uic
+    AC_MSG_RESULT(assumed present)
+fi
+])
+
+
+dnl ##
+dnl ##  MOC check, should come after the Qt check
+dnl ##
+dnl ##  configure.in:
+dnl ##    AC_CHECK_MOC
+dnl ##
+
+AC_DEFUN(AC_CHECK_MOC,[dnl
+AC_MSG_CHECKING(MOC location)
+if test -x ${QTBASE}/bin/moc
+then
+    MOC=${QTBASE}/bin/moc
+    AC_MSG_RESULT(${QTBASE}/bin/moc)
+else
+    MOC=moc
+    AC_MSG_RESULT(assumed present)
+fi
+])
+
+
+dnl ##  PKG_CHECK_MODULES(GSTUFF, gtk+-2.0 >= 1.3 glib = 1.3.4, action-if, action-not)
+dnl ##  defines GSTUFF_LIBS, GSTUFF_CFLAGS, see pkg-config man page
+dnl ##  also defines GSTUFF_PKG_ERRORS on error
+AC_DEFUN(PKG_CHECK_MODULES, [
+  succeeded=no
+
+  if test -z "$PKG_CONFIG"; then
+    AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
+  fi
+
+  if test "$PKG_CONFIG" = "no" ; then
+     echo "*** The pkg-config script could not be found. Make sure it is"
+     echo "*** in your path, or set the PKG_CONFIG environment variable"
+     echo "*** to the full path to pkg-config."
+     echo "*** Or see http://www.freedesktop.org/software/pkgconfig to get pkg-config."
+  else
+     PKG_CONFIG_MIN_VERSION=0.9.0
+     if $PKG_CONFIG --atleast-pkgconfig-version $PKG_CONFIG_MIN_VERSION; then
+        AC_MSG_CHECKING(for $2)
+
+        if $PKG_CONFIG --exists "$2" ; then
+            AC_MSG_RESULT(yes)
+            succeeded=yes
+
+            AC_MSG_CHECKING($1_CFLAGS)
+            $1_CFLAGS=`$PKG_CONFIG --cflags "$2"`
+            AC_MSG_RESULT($$1_CFLAGS)
+
+            AC_MSG_CHECKING($1_LIBS)
+            $1_LIBS=`$PKG_CONFIG --libs "$2"`
+            AC_MSG_RESULT($$1_LIBS)
+        else
+            $1_CFLAGS=""
+            $1_LIBS=""
+            ## If we have a custom action on failure, don't print errors, but 
+            ## do set a variable so people can do so.
+            $1_PKG_ERRORS=`$PKG_CONFIG --errors-to-stdout --print-errors "$2"`
+            ifelse([$4], ,echo $$1_PKG_ERRORS,)
+        fi
+
+        AC_SUBST($1_CFLAGS)
+        AC_SUBST($1_LIBS)
+     else
+        echo "*** Your version of pkg-config is too old. You need version $PKG_CONFIG_MIN_VERSION or newer."
+        echo "*** See http://www.freedesktop.org/software/pkgconfig"
+     fi
+  fi
+
+  if test $succeeded = yes; then
+     ifelse([$3], , :, [$3])
+  else
+     ifelse([$4], , AC_MSG_ERROR([Library requirements ($2) not met; consider adjusting the PKG_CONFIG_PATH environment variable if your libraries are in a nonstandard prefix so pkg-config can find them.]), [$4])
+  fi
+])
+
+
+dnl ##
+dnl ##  Debugging Support
+dnl ##
+dnl ##  configure.in:
+dnl ##    AC_CHECK_DEBUGGING
+dnl ##
+
+AC_DEFUN(AC_CHECK_DEBUGGING,[dnl
+AC_ARG_ENABLE(debug,dnl
+[  --enable-debug          build for debugging (default=no)],
+[dnl
+if test ".$ac_cv_prog_gcc" = ".yes"; then
+    case "$CXXFLAGS" in
+        *-O* ) ;;
+           * ) CXXFLAGS="$CXXFLAGS -O2" ;;
+    esac
+    case "$CXXFLAGS" in
+        *-g* ) ;;
+           * ) CXXFLAGS="$CXXFLAGS -g" ;;
+    esac
+    case "$CXXFLAGS" in
+        *-pipe* ) ;;
+              * ) AC_COMPILER_OPTION(pipe, -pipe, -pipe, CXXFLAGS="$CXXFLAGS -pipe") ;;
+    esac
+    AC_COMPILER_OPTION(defdbg, -DDEBUG, -DDEBUG, CXXFLAGS="$CXXFLAGS -DDEBUG")
+dnl    AC_COMPILER_OPTION(ggdb3, -ggdb3, -ggdb3, CXXFLAGS="$CXXFLAGS -ggdb3")
+    CXXFLAGS="$CXXFLAGS -pedantic"
+    CXXFLAGS="$CXXFLAGS -Wall"
+    WMORE="-Wshadow -Wpointer-arith -Wcast-align -Winline"
+    WMORE="$WMORE -Wmissing-prototypes -Wmissing-declarations -Wnested-externs"
+    AC_COMPILER_OPTION(wmore, -W<xxx>, $WMORE, CXXFLAGS="$CXXFLAGS $WMORE")
+    AC_COMPILER_OPTION(wnolonglong, -Wno-long-long, -Wno-long-long, CXXFLAGS="$CXXFLAGS -Wno-long-long")
+else
+    case "$CXXFLAGS" in
+        *-g* ) ;;
+           * ) CXXFLAGS="$CXXFLAGS -g" ;;
+    esac
+fi
+msg="enabled"
+dnl AC_DEFINE(DEBUG, 1, [Define to 1 if you want to enable debugging])
+],[
+if test ".$ac_cv_prog_gcc" = ".yes"; then
+case "$CXXFLAGS" in
+    *-pipe* ) ;;
+          * ) AC_COMPILER_OPTION(pipe, -pipe, -pipe, CXXFLAGS="$CXXFLAGS -pipe") ;;
+esac
+fi
+case "$CXXFLAGS" in
+    *-g* ) CXXFLAGS=`echo "$CXXFLAGS" |\
+                   sed -e 's/ -g / /g' -e 's/ -g$//' -e 's/^-g //g' -e 's/^-g$//'` ;;
+esac
+case "$CXXFLAGS" in
+    *-g* ) CXXFLAGS=`echo "$CXXFLAGS" |\
+                     sed -e 's/ -g / /g' -e 's/ -g$//' -e 's/^-g //g' -e 's/^-g$//'` ;;
+esac
+
+CXXFLAGS="$CXXFLAGS -DQT_NO_DEBUG"
+msg=disabled
+])dnl
+AC_MSG_CHECKING(for compilation debug mode)
+AC_MSG_RESULT([$msg])
+if test ".$msg" = .enabled; then
+    enable_shared=no
+fi
+])
+
+define(AC_IFALLYES,[dnl
+ac_rc=yes
+for ac_spec in $1; do
+    ac_type=`echo "$ac_spec" | sed -e 's/:.*$//'`
+    ac_item=`echo "$ac_spec" | sed -e 's/^.*://'`
+    case $ac_type in
+        header [)]
+            ac_item=`echo "$ac_item" | sed 'y%./+-%__p_%'`
+            ac_var="ac_cv_header_$ac_item"
+            ;;
+        file [)]
+            ac_item=`echo "$ac_item" | sed 'y%./+-%__p_%'`
+            ac_var="ac_cv_file_$ac_item"
+            ;;
+        func    [)] ac_var="ac_cv_func_$ac_item"   ;;
+        lib     [)] ac_var="ac_cv_lib_$ac_item"    ;;
+        define  [)] ac_var="ac_cv_define_$ac_item" ;;
+        typedef [)] ac_var="ac_cv_typedef_$ac_item" ;;
+        custom  [)] ac_var="$ac_item" ;;
+    esac
+    eval "ac_val=\$$ac_var"
+    if test ".$ac_val" != .yes; then
+        ac_rc=no
+        break
+    fi
+done
+if test ".$ac_rc" = .yes; then
+    :
+    $2
+else
+    :
+    $3
+fi
+])
+
+
+dnl ##
+dnl ##  Check for an external/extension library.
+dnl ##  - is aware of <libname>-config style scripts
+dnl ##  - searches under standard paths include, lib, etc.
+dnl ##  - searches under subareas like .libs, etc.
+dnl ##
+dnl ##  configure.in:
+dnl ##      AC_CHECK_EXTLIB(<realname>, <libname>, <func>, <header>,
+dnl ##                      [<success-action> [, <fail-action>]])
+dnl ##  Makefile.in:
+dnl ##      CFLAGS  = @CFLAGS@
+dnl ##      LDFLAGS = @LDFLAGS@
+dnl ##      LIBS    = @LIBS@
+dnl ##  shell:
+dnl ##      $ ./configure --with-<libname>[=DIR]
+dnl ##
+
+AC_DEFUN(AC_CHECK_EXTLIB,[dnl
+AC_ARG_WITH($2, [dnl
+[  --with-]m4_substr([$2[[=DIR]]                     ], 0, 19)[build with external $1 library (default=no)]], [dnl
+    if test ".$with_$2" = .yes; then
+        #   via config script
+        $2_version=`($2-config --version) 2>/dev/null`
+        if test ".$$2_version" != .; then
+            CFLAGS="$CFLAGS `$2-config --cflags`"
+            LDFLAGS="$LDFLAGS `$2-config --ldflags`"
+        fi
+    else
+        if test -d "$with_$2"; then
+            found=0
+            #   via config script
+            for dir in $with_$2/bin $with_$2; do
+                if test -f "$dir/$2-config"; then
+                    $2_version=`($dir/$2-config --version) 2>/dev/null`
+                    if test ".$$2_version" != .; then
+                        CFLAGS="$CFLAGS `$dir/$2-config --cflags`"
+                        LDFLAGS="$LDFLAGS `$dir/$2-config --ldflags`"
+                        found=1
+                        break
+                    fi
+                fi
+            done
+            #   via standard paths
+            if test ".$found" = .0; then
+                for dir in $with_$2/include/$2 $with_$2/include $with_$2; do
+                    if test -f "$dir/$4"; then
+                        CFLAGS="$CFLAGS -I$dir"
+                        found=1
+                        break
+                    fi
+                done
+                for dir in $with_$2/lib/$2 $with_$2/lib $with_$2; do
+                    if test -f "$dir/lib$2.a" -o -f "$dir/lib$2.so"; then
+                        LDFLAGS="$LDFLAGS -L$dir"
+                        found=1
+                        break
+                    fi
+                done
+            fi
+            #   in any subarea
+            if test ".$found" = .0; then
+changequote(, )dnl
+                for file in x `find $with_$2 -name "$4" -type f -print`; do
+                    test .$file = .x && continue
+                    dir=`echo $file | sed -e 's;[[^/]]*$;;' -e 's;\(.\)/$;\1;'`
+                    CFLAGS="$CFLAGS -I$dir"
+                done
+                for file in x `find $with_$2 -name "lib$2.[[aso]]" -type f -print`; do
+                    test .$file = .x && continue
+                    dir=`echo $file | sed -e 's;[[^/]]*$;;' -e 's;\(.\)/$;\1;'`
+                    LDFLAGS="$LDFLAGS -L$dir"
+                done
+changequote([, ])dnl
+            fi
+        fi
+    fi
+    AC_HAVE_HEADERS($4)
+    AC_CHECK_LIB($2, $3)
+    AC_IFALLYES(header:$4 lib:$2_$3, with_$2=yes, with_$2=no)
+    if test ".$with_$2" = .no; then
+        AC_ERROR([Unable to find $1 library])
+    fi
+    ], [dnl
+if test ".$with_$2" = .; then
+    with_$2=no
+fi
+    ])dnl
+AC_MSG_CHECKING(whether to build against external $1 library)
+if test ".$with_$2" = .yes; then
+    ifelse([$5], , :, [$5])
+else
+    ifelse([$6], , :, [$6])
+fi
+AC_MSG_RESULT([$with_$2])
+])dnl