[XeTeX] Testing for XeTeX

Ulrike Fischer news3 at nililand.de
Tue Feb 2 19:27:09 CET 2010

Am Tue, 02 Feb 2010 17:52:31 +0000 schrieb Philip TAYLOR:

> What is the recommended way to test if one is compiling
> under XeTeX ?  I na\ively assumed that the following
> would suffice, but it did not :

Package ifxetex defines a \ifxetex-switch. 

\expandafter\ifx\csname XeTeXrevision\endcsname\relax

Ulrike Fischer 

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