[XeTeX] The arcs package

[Michael Sharpe]

On Aug 25, 2013, at 7:42 AM, Arash Zeini <arash.zeini at gmail.com> wrote:

> Hello,
> 
> Since the upgrade to TeX Live 2013, the arcs package behaves strangely. It draws the desired arc under the respective characters, but a string like "5.0pt" will always precede the characters with the arc. Has anyone else noticed this problem?
> 
> I have tried this MWE with two different fonts on two computers running Debian unstable and a "vanilla" TL 2013:
> 
> \documentclass[a4paper,12pt]{article}
> 
> \usepackage{xltxtra}
> 
> \setromanfont[Mapping=tex-text]{Junicode}
> \usepackage{arcs}
> 
> \begin{document}
> An underarc: \underarc{ab}. And now an overarc: \overarc{ab}.
> 
> \end{document}
> 
> Best wishes,
> Arash

The arcs package depends on the relsize package which did change a few months ago in a way that requires a small change in the arcs package. You need to add the line (just after \RequirePackage{relsize} is a good place}

\long\def \@gobblethree #1#2#3{}

and then change the line

\let \rs at size@warning = \@gobbletwo

to

\let \rs at size@warning = \@gobblethree

because, in relsize.sty, the macro \rs at size@warning is now defined to have three arguments, the last of which (6.0pt) was being left as printable text. This problem is a LaTeX issue and has nothing particular to XeTeX.

Michael