[texhax] undertilde and MiKTeX

[Philip TAYLOR]

On 27/10/2017 22:05, Rolf Turner wrote: "I don't do Windoze* !!!"
"Can some clever person instruct me (monosyllabically; I'm a Bear of 
Very Little Brain) as to how to construct such a conditional?"

Well, (a) I am not clever, and (b) I don't do LameTeX, but this may help :

\documentclass {minimal}

\newread \undertilde

\openin \undertilde = undertilde.sty

\ifeof \undertilde

\closein \undertilde

\openin \undertilde = undertilde.tex

\ifeof \undertilde

\closein \undertilde

\let \next = \relax

      \else

\closein \undertilde

\def \next {\input undertilde.tex}

      \fi

\else

\closein \undertilde

      \def \next {\usepackage {undertilde}}

\fi

\next

\begin {document}

\end {document}

Philip Taylor

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