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
])