dnl use: ECORE_CHECK_X_EXTENSION(Foo, header, lib, func, want)
AC_DEFUN([ECORE_CHECK_X_EXTENSION],
[
pushdef([UP], translit([$1], [a-z], [A-Z]))dnl
pushdef([DOWN], translit([$1], [A-Z], [a-z]))dnl

UP[]_CFLAGS=""
UP[]_LIBS=""
use_[]DOWN="no"

if test "x$5" != "xno"; then
  SAVE_CFLAGS=$CFLAGS
  CFLAGS="$x_cflags $x_includes"
  AC_CHECK_HEADER(X11/extensions/$2,
    [
     AC_CHECK_LIB($3, $4,
       [
        AC_DEFINE(ECORE_[]UP, 1, [Build support for $1])
        UP[]_LIBS="-l$3"
        use_[]DOWN="yes"
       ],
       [use_[]DOWN="no"],
       [$x_libs]
     )
    ],
    [ use_[]DOWN="no" ],
    [ #include <X11/Xlib.h> ]
  )
  CFLAGS=$SAVE_CFLAGS
else
  use_[]DOWN="no"
  AC_MSG_NOTICE([$1 support disabled])
fi

ECORE_X_LIBS="${ECORE_X_LIBS} ${UP[]_LIBS}"

AC_SUBST(UP[]_CFLAGS)
AC_SUBST(UP[]_LIBS)

popdef([UP])
popdef([DOWN])
])