[XeTeX] Charis SIL and omicron

[Peter Baker]

Arash Zeini wrote:
> Dear All,
>
> I am using Charis SIL, version 4.106 on a Linux machine with:
>
> XeTeX 3.1415926-2.2-0.999.6 (Web2C 7.5.7)
> kpathsea version 3.5.7
> Copyright 2008 SIL International.
>
> Today I noticed the following message at the end of the compilation if I used 
> an omicron in my text: 
>
> ** WARNING ** Invalid CMap mapping entry. (ignored)
>
> The resulting PDF has only empty boxes instead of the intended omicron (see 
> attached). A minimal example:
>
> \documentclass[a4paper,12pt]{article}
>
> \usepackage{xltxtra}
>
> \setmainfont[Mapping=tex-text]{Charis SIL}
> % \setromanfont[Mapping=tex-text]{Linux Libertine O}
>
> \begin{document}
> The Greek capital letter omicron Ο, \textit{Ο} and its small version ο, 
> \textit{ο}. A test with Δ δ, also in italics \emph{Δ δ}. And more: Θ θ Γ γ.
>
>   
CharisSIL 4.106 doesn't have upper- or lower-case omicron. Its Greek set 
seems to be limited to those characters used in the IPA. Those glyphs 
have shapes appropriate to the IPA rather than those commonly used in 
setting Greek.