dnl AX_CHECK_HEADER_LIB([HEADER-NAME], [LIBRARY-NAME], [FUNCTION-IN-LIB], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], [LIB-WEB-PAGE])
AC_DEFUN([AX_CHECK_HEADER_LIB], [
    _header_check=""
    _lib_check=""

    AC_CHECK_HEADER([$1], [_header_check="yes"], [_header_check="no"])
    AC_CHECK_LIB([$2], [$3], [_lib_check="yes"], [_lib_check="no"])
    if [test "x$_header_check" = "xyes" && test "x$_lib_check" = "xyes"] ; then
         LIBS="$LIBS -l$2"
         $4
    else
         echo "no Support for $2"
         $5
    fi
])



dnl AX_CHECK_REQUIRED_HEADER_LIB([HEADER-NAME], [LIBRARY-NAME], [FUNCTION-IN-LIB], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], [LIB-WEB-PAGE])
AC_DEFUN([AX_CHECK_REQUIRED_HEADER_LIB], [
    _header_check=""
    _lib_check=""

    for _header in $1
    do
      AC_CHECK_HEADER([$_header], [_header_check="yes"], [_header_check="no"])
      if  test "x$_header_check" = "xyes" ; then
        break
      fi
    done
    AC_CHECK_LIB([$2], [$3], [_lib_check="yes"], [_lib_check="no"])
    if [test x$_header_check = "xyes" && test "x$_lib_check" = "xyes"] ; then
         LIBS="$LIBS -l$2"
         $4
    else
         echo "------------------"
         echo "LIBRARY $2 not found."
         echo "please install the $2-LIBRARY-package which can be found at $6"
         echo "------------------"
         $5
         exit -1
    fi
])



dnl AX_CHECK_REQUIRED_LIB([LIBRARY-NAME], [FUNCTION-IN-LIB], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], [LIB-WEB-PAGE])
AC_DEFUN([AX_CHECK_REQUIRED_LIB], [
    _lib_check=""
    _found_lib=""


    for _lib in $1
    do
      AC_CHECK_LIB([$_lib], [$2], [_lib_check="yes"], [_lib_check="no"])
      if test "x$_lib_check" = "xyes" ; then
        _found_lib=$_lib
        break
      fi
    done

    if [test "x$_lib_check" = "xyes"] ; then
         LIBS="$LIBS -l$_found_lib"
         $3
    else
         echo "------------------"
         echo "LIBRARY $1 not found."
         echo "please install the $1-LIBRARY-package which can be found at $5"
         echo "------------------"
         $4
         exit -1
    fi
])




dnl AX_CHECK_QT([QTDIR], [LIBRARIES], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], [LIB-WEB-PAGE])
AC_DEFUN([AX_CHECK_QT], [
    _lib_check=""
    _found_lib=""
    QT_PREFIX="$1"
    QT_INCLUDE_DIRECTORY=""
    QT_LIB_DIRECTORY=""


    QT_COMMON_INCLUDE_DIRECTORIES="
      `ls -dr ${QT_PREFIX}/include     2>/dev/null`
      /usr/include
      `ls -dr /usr/include/qt*         2>/dev/null`
      `ls -dr /usr/lib/qt*/include     2>/dev/null`
      `ls -dr /usr/local/qt*/include   2>/dev/null`
      `ls -dr /opt/qt*/include         2>/dev/null`
      `ls -dr /Developer/qt*/include   2>/dev/null`
    "

    QT_COMMON_LIB_DIRECTORIES="
      `ls -dr ${QT_PREFIX}/lib         2>/dev/null`
      /usr/include
      `ls -dr /usr/lib/qt*             2>/dev/null`
      `ls -dr /usr/lib/qt*             2>/dev/null`
      `ls -dr /usr/local/qt*/lib       2>/dev/null`
      `ls -dr /opt/qt*/lib             2>/dev/null`
      `ls -dr /Developer/qt*/lib       2>/dev/null`
    "

    ## Search in all IncludeDirectories for QT-includes
    for _include_directory in ${QT_COMMON_INCLUDE_DIRECTORIES}
    do
      if test -e ${_include_directory}/Qt/QtCore ; then
        QT_INCLUDE_DIRECTORY=${_include_directory}
        break
      fi
    done
    if test -n ${QT_INCLUDE_DIRECTORY} ; then
      echo "Qt-Include Directory is: ${QT_INCLUDE_DIRECTORY}"
    else
      AC_MSG_ERROR([Qt Headers not found])
    fi

## Search in all LibraryDirectories for QT-includes
    for _lib_directory in ${QT_COMMON_LIB_DIRECTORIES}
    do
      if test -e ${_lib_directory}/libQtCore.so || test -e ${_lib_directory}/libQtCore.dll ; then
        QT_LIB_DIRECTORY=${_lib_directory}
        break
      fi
    done
    if test -n ${QT_LIB_DIRECTORY} ; then
      echo "Qt-Library Directory is: ${QT_LIB_DIRECTORY}"
    else
      AC_MSG_ERROR([Qt LIB not found])
    fi

## Setting up the Environment Variables.
    QT_LIBS=""
    QT_CXXFLAGS="-I${QT_INCLUDE_DIRECTORY}"
    LDFLAGS="${LDFLAGS} -L${QT_LIB_DIRECTORY} -Wl,-rpath -Wl,${QT_LIB_DIRECTORY}"
    QT_BIN_DIR="${QT_PREFIX}/bin"

    CACHED_CPPFLAG=${CPPFLAGS}
    CACHED_LDFLAGS=${LDFLAGS}

    LDFLAGS="${LDFLAGS} ${QT_LDFLAGS}"
    for _lib in $2
    do
      AC_CHECK_LIB([$_lib], [main], [_lib_check="yes"], [_lib_check="no"])
      if test "x$_lib_check" = "xyes" ; then
        _found_lib=$_lib
        break
      fi
    done

    if [test "x$_lib_check" = "xyes"] ; then
         QT_LIBS="${QT_LIBS} -l$_found_lib"
         AX_CHECK_REQUIRED_LIB([QtCore QtCore4], [main],,,[http://www.trolltech.com] )
         AX_CHECK_REQUIRED_LIB([QtGui QtGui4], [main],,,[http://www.trolltech.com] )
         AX_CHECK_REQUIRED_LIB([QtOpenGL QtOpenGL4], [main],,,[http://www.trolltech.com] )

         $3
    else
         echo "------------------"
         echo "LIBRARY $2 not found.in $1"
         echo "please install the $1-LIBRARY-package which can be found at $5"
         echo "------------------"
         $4
         exit -1
    fi

    echo "QT_LIBS = ${QT_LIBS}"
    echo "QT_CXXFLAGS = ${QT_CXXFLAGS}"
    echo "QT_LD_FLAGS = ${QT_LDFLAGS}"

    AC_SUBST([QT_LIBS])
    AC_SUBST([QT_CXXFLAGS])
    AC_SUBST([QT_LDFLAGS])

    #----------#
    # QT - MOC #
    #----------#
    AC_PATH_PROG([QT_MOC], [moc], [no], ["${QT_BIN_DIR}:${PATH}"])
      if test x${QT_MOC} = xno ; then
        AC_MSG_ERROR([QT MOC not found])
      fi
    AC_SUBST([QT_MOC])

    AC_PATH_PROG([QT_UIC], [uic], [no], ["${QT_BIN_DIR}:${PATH}"])
 #     if test x${QT_UIC} = xno ; then
 #       AC_MSG_WARN([QT UIC not found])
 #     fi
    AC_SUBST([QT_UIC])

    AC_PATH_PROG([QT_RCC], [rcc], [no], ["${QT_BIN_DIR}:${PATH}"])
#      if test x${QT_RCC} = xno ; then
#        AC_MSG_WARN([QT RCC not found])
#      fi
    AC_SUBST([QT_RCC])



    # Restore Values of CPPFLAGS and LDFLAGS
    CPPFLAGS=${CACHED_CPPFLAG}
    LDFLAGS=${CACHED_LDFLAGS}
])