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([LIBDIR], [LIBRARIES], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], [LIB-WEB-PAGE])
AC_DEFUN([AX_CHECK_QT], [
    _lib_check=""
    _found_lib=""


    QT_PREFIX="$1"
    QT_LIBS=""
    QT_CXXFLAGS="-I${QT_PREFIX}/include"
    QT_LDFLAGS="-L${QT_PREFIX}/lib -Wl,-rpath -Wl,${QT_PREFIX}/lib"
    QT_BIN_DIR="${QT_PREFIX}/bin"

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

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

    if [test "x$_lib_check" = "xyes"] ; then
         QT_LIBS="${QT_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
    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_ERROR([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_ERROR([QT RCC not found])
      fi
    AC_SUBST([QT_RCC])



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