[tex-live] that nasty \undefined in supp-pdf.mkii again

Norbert Preining norbert at preining.info
Tue Oct 24 05:14:37 CEST 2017

Dear all,

back in 2010 (!!!) https://tug.org/pipermail/tex-live/2010-March/025102.html
I complained about the fact that a minimal tex document
  This is an \undefined\ command.
does not work anymore. This was due to the auto-loading of supp-pdf.mkii
that was introduced in TL2009 (or so).

The reason is that supp-pdf.mkii uses
to check for an undefined commands.

I argued that this is wrong to do it this way, especially since this
is loaded now in LaTeX. See

There was the conclusion that pdftex.def should deal with this and
Heiko send a fixed pftex.def:

I tested that and it worked.

But alas here we are in 2017 and a colleague just asked me the very same
question, because he writes a logic text book and uses \undefined as
a macro.

Can we somehow work that out again?

All the best


PREINING Norbert                               http://www.preining.info
Accelia Inc.     +    JAIST     +    TeX Live     +    Debian Developer
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