Acronyms sorted alphabetically in Index

Question

I am using glossaries package with the acronym option \usepackage[acronym,toc,shortcuts]{glossaries}. When my Index is generated, the acronyms are not listed alphabetically but rather as a "Symbol" entry within the index (image below). I am writing a thesis and have a separate list of Acronyms so this "Symbol" entry in the Index is rather useless for me. Is there a way that the acronyms can be sorted alphabetically in the Index just like the rest of the entries?

MWE:

\documentclass[11pt]{article}
\usepackage{makeidx} 
\makeindex
\usepackage[acronym,toc,shortcuts]{glossaries}
\makeglossaries

\newacronym{cd}{CD}{compact disk}


\begin{document}
\noindent
First\index{first} use of \gls{cd}\\
subsequent\index{subsequent} use of \gls{cd}\index{\glsfirst{cd}}

\printglossaries
\printindex

\end{document}

Answer 1

The argument of \index doesn't get expanded when written to the .idx file, so makeindex is trying to sort \glsfirst{cd}. Since makeindex doesn't interpret TeX commands, it views this as a string starting with the backslash character, which is why the entry is considered a symbol. Here's a way of automatically indexing subsequent uses of the acronyms that expands the indexed term before writing it to the .idx file:

\documentclass[11pt]{article}
\usepackage{makeidx}
\makeindex
\usepackage[acronym,toc,shortcuts]{glossaries}
\makeglossaries

\renewcommand*{\CustomAcronymFields}{%
  name={\the\glsshorttok},%
  symbol={\the\glsshorttok},%
  text={\the\glsshorttok\protect\index{\the\glslongtok\space(\the\glsshorttok)}},%
  plural={\the\glsshorttok\noexpand\acrpluralsuffix\protect\index{\the\glslongtok\space(\the\glsshorttok)}},%
  first={\the\glslongtok\space(\the\glsshorttok)},%
  firstplural={\the\glslongtok\noexpand\acrpluralsuffix\space(\the\glsshorttok)},%
  description={\the\glslongtok}%
}

\SetCustomStyle

\newacronym{cd}{CD}{compact disk}


\begin{document}
\noindent
First\index{first} use of \gls{cd}\\
subsequent\index{subsequent} use of \gls{cd}.

\printglossaries
\printindex

\end{document}

Assuming I have the makeindex headings flag set (via headings_flag 1 in a .ist file) I get the following index:

If you only want to index some subsequent entries rather than all of them, here's another approach that saves the index command with expanded argument in the user1 field:

\documentclass[11pt]{article}
\usepackage{makeidx}
\makeindex
\usepackage[acronym,toc,shortcuts]{glossaries}
\makeglossaries

\renewcommand*{\CustomAcronymFields}{%
  name={\the\glsshorttok},%
  symbol={\the\glsshorttok},%
  text={\the\glsshorttok},%
  plural={\the\glsshorttok\noexpand\acrpluralsuffix},%
  first={\the\glslongtok\space(\the\glsshorttok)},%
  firstplural={\the\glslongtok\noexpand\acrpluralsuffix\space(\the\glsshorttok)},%
  description={\the\glslongtok},%
  user1={\protect\index{\the\glslongtok\space(\the\glsshorttok)}}%
}

\SetCustomStyle

\newacronym{cd}{CD}{compact disk}


\begin{document}
\noindent
First\index{first} use of \gls{cd}\\
subsequent\index{subsequent} use of \gls{cd}.

\newpage

Another use of \gls{cd}\glsuseri{cd}.

\printglossaries
\printindex

\end{document}

The index now looks like: