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Add a warning about OPTION_SINGLE usage.

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Sponsored by:	Absolight
This commit is contained in:
Mathieu Arnold 2014-09-09 13:12:57 +00:00
parent e24c9b8a23
commit d237299818
Notes: svn2git 2020-12-08 03:00:23 +00:00 
svn path=/head/; revision=45574
1 changed files with 8 additions and 0 deletions

8
en_US.ISO8859-1/books/porters-handbook/makefiles/chapter.xml
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@ -3576,6 +3576,14 @@ OPT6_DESC= Describe OPT6</programlisting>
<programlisting>OPTIONS_SINGLE= SG1
OPTIONS_SINGLE_SG1= OPT3 OPT4</programlisting>
<warning>
<para>There <emphasis>must</emphasis> be one of each
<literal>OPTIONS_SINGLE</literal> group selected at all
time for the options to be valid. One option of each
group <emphasis>must</emphasis> be added to
<varname>OPTIONS_DEFAULT</varname>.</para>
</warning>
<para><varname>OPTIONS</varname> can be grouped as radio
choices, where none or only one choice from each group
is allowed:</para>