[XeTeX] aemph redefined: arabxetex and polyglossia

[Juan Acevedo]

Hello everyone,

When running the following minimal test file:
-------------------------------
%!TEX TS-program = xelatex
%!TEX encoding = UTF-8 Unicode
\documentclass{book}
\usepackage{xltxtra}

\usepackage{polyglossia}
\usepackage{arabxetex}

\begin{document}test run\end{document}
-------------------------------
 
compiling stops with this message:
! LaTeX Error: Command \aemph already defined.
               Or name \end... illegal, see p.192 of the manual.

Now, back in 2010 this problem came up here, when Gareth Hughes offered the solution:

"If you remove \setotherlanguage{arabic}, polyglossia won't define \aemph."

but this does not seem to work.

I am using MacTeX2011, everything up to date. 

I wonder, is there any solution around for this, other than fiddling with the package itself and saving a copy in my local texmf?

Here is the command definition in polyglossia.sty:

\AtEndPreamble{\@ifpackageloaded{bidi}{\newcommand*{\aemph}[1]{$\overline{\hboxR{#1}}$}}{}}

And the arabxetex.sty version:

 \newcommand{\aemph}[1]{%
  \edef\@tempb{\expandafter\noexpand\csname text\ax at lang\endcsname}%
  $\overline{\text{\@tempb{#1}}}$}

Maybe I can do a little trick in my preamble to prevent the "already defined" warning?

Gracias mil,
Juan