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- Describe technical background of OPTIONS deficiency

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PR:		docs/97477
Submitted by:	Shaun Amott <shaun@inerd.com>
This commit is contained in:
Pav Lucistnik 2006-06-04 19:15:21 +00:00
parent 89426c9de2
commit ce21f869ad
Notes: svn2git 2020-12-08 03:00:23 +00:00 
svn path=/head/; revision=28025
1 changed files with 13 additions and 5 deletions
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18
en_US.ISO8859-1/books/porters-handbook/book.sgml
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@ -3825,12 +3825,20 @@ ${PREFIX}/man/ja/man4/baz.4.gz</programlisting>
the inclusion of <filename>bsd.port.pre.mk</filename>.
The <makevar>WITH_*</makevar> and <makevar>WITHOUT_*</makevar>
variables can only be tested after the inclusion of
<filename>bsd.port.pre.mk</filename>. Due to a deficiency
in the infrastructure, you can only test
<makevar>WITH_*</makevar> variables for options, which are
<filename>bsd.port.pre.mk</filename>.</para>
<para>
Due to a deficiency in the infrastructure, you can only test
<makevar>WITH_*</makevar> variables for options which are
<literal>OFF</literal> by default, and
<makevar>WITHOUT_*</makevar> variables for options, which
defaults to <literal>ON</literal>.</para>
<makevar>WITHOUT_*</makevar> variables for options which
default to <literal>ON</literal>. The reasoning behind this:
when packages are built with <makevar>PACKAGE_BUILDING</makevar> or
<makevar>BATCH</makevar> defined, the <command>config</command>
target is not run, and therefore no <makevar>OPTIONS</makevar>
are selected. This would cause <command>make depends</command> and
<command>make describe</command> to break for ports not following
the aforementioned rule.</para>
<sect3>
<title>Example</title>