CTAN update: iftex

CTAN Announcements ctan-ann at ctan.org
Sun Nov 10 20:41:07 CET 2019

The LaTeX Team  submitted an update to the



Version number: 1.0c
License type: lppl1.3c

Summary description: Am I running under pdfTeX, XeTeX or LuaTeX?

Announcement text:

Update to iftex with no change to the user interface but internal tests
now treat \relax like undefined when testing for the existence of
engine-specific commands.

So for example \ifxetex is set to false if \XeTeXrevision is undefined
or if it is defined to be \relax.


This package is located at 

More information is at


   Thanks for the upload.

     For the CTAN Team
    Manfred Lotz

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