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I thought that loading a package twice with the same options cannot lead to option clash, still I get a clash in the following simple example:

\documentclass{article} \RequirePackage[patch]{kvoptions} \RequirePackage[patch]{kvoptions} \begin{document} Hello World! \end{document}

This is a MnWE, what I really want to achieve is to create two dependent classes like this:

myclass.cls

\NeedsTeXFormat{LaTeX2e}[1995/12/01] \ProvidesClass{myclass}[2012/05/24 v1.0 My Class] \RequirePackage[patch]{kvoptions} \endinput

anotherclass.cls

\NeedsTeXFormat{LaTeX2e}[1995/12/01] \ProvidesClass{anotherclass}[2012/05/24 v1.0 Another Class] \RequirePackage[patch]{kvoptions} % I need to use some features of `kvoptions` here \LoadClass{myclass} \endinput

test.tex

\documentclass{anotherclass} \begin{document} Hello World! \end{document}

Version information

  • It works properly with LaTeX2e <2005/12/01> (TeXLive installed 2009)
  • It does not work with LaTeX2e <2011/06/27> (TeXLive installed 2012)
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3
  • your MWE works for me - no clash Commented Jun 2, 2012 at 11:03
  • It works in my old TeXlive2009. But it does not work with a TeXlive that I installed 2 days ago from the web... Commented Jun 2, 2012 at 11:28
  • strange ... it does here ... (c:/texlive/2011/texmf-dist/tex/latex/base/article.cls Document Class: article 2007/10/19 v1.4h Standard LaTeX document class (c:/texlive/2011/texmf-dist/tex/latex/base/size10.clo)) (c:/texlive/2011/texmf-dist/tex/latex/oberdiek/kvoptions.sty (c:/texlive/2011/texmf-dist/tex/latex/graphics/keyval.sty) (c:/texlive/2011/texmf-dist/tex/generic/oberdiek/ltxcmds.sty) ... So looks like it also worked with TL2011 but not with the current version from the web Commented Jun 2, 2012 at 11:41

2 Answers 2

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7

use

\NeedsTeXFormat{LaTeX2e}[1995/12/01] \ProvidesClass{myclass}[2012/05/24 v1.0 My Class] \PassOptionsToPackage{patch}{kvoptions} \RequirePackage{kvoptions} \endinput

and the same for your example:

\PassOptionsToPackage{patch}{kvoptions} \documentclass{article} \RequirePackage{kvoptions} \RequirePackage{kvoptions} \begin{document} Hello World! \end{document}
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2
  • 1
    What is the exact difference of latex's treatment of \RequirePackage[<put_options_here>]{package} and \PassOptionsToPackage{<put_options_here>]{package}? I don't see why there should be any difference... Commented Jun 2, 2012 at 11:27
  • It seems to work, still I'm interested why the difference... Commented Jun 2, 2012 at 11:36
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The documentation of kvoptions says, on page 12

• Since 2008/10/18 v3.0 package kvoptions-patch is available. Before option patch of package kvoptions must be used instead. I think, the solution as standalone package kvoptions-patch is cleaner and avoids option clashes.

So use 

\RequirePackage{kvoptions-patch} \RequirePackage{kvoptions}
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  • still where is the class in the original MWE? Commented Jun 2, 2012 at 11:06
  • @egreg It is nice that kvoptions has an alternative and thanks for it, but the problem is more general in my opinion. Commented Jun 2, 2012 at 11:25
  • 1
    @tohecz You have to call both packages: it's kvoptions that defines \DeclareVoidOption. Commented Jun 2, 2012 at 12:37

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