#517 tikzmath: undefined control sequence \ifpgfmathfloatparseactive

[Henri Menke]

A simple tikzmath example fails with an undefined control sequence error.

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{math}
\begin{document}
\begin{tikzpicture}
\tikzmath{
  let \x = 42;
  if \x == 42 then {
    {\fill (0,0) circle (1cm);};
  };
}
\end{tikzpicture}
\end{document}

! Undefined control sequence.
\tikz@math@if@@doif ...\ifpgfmathfloatparseactive 
                                                  \pgfmathfloattofixed {\pgf...

[Henri Menke]

tikzmath needs to know about fpu. A simple workaround is to add

\usetikzlibrary{fpu}

Fixed in https://sourceforge.net/p/pgf/git/ci/f1c7cb0902f4e5bd5cf1ba63b954bd0371bed67b/