* Russ Allbery <rra@debian.org>, 2012-08-12, 13:19:
--- a/policy.sgml +++ b/policy.sgml @@ -1987,52 +1987,34 @@ zope. </p> </item> - <tag><tt>build-arch</tt> (optional), - <tt>build-indep</tt> (optional) + <tag><tt>build-arch</tt> (required), + <tt>build-indep</tt> (required) </tag> <item> <p> - A package may also provide one or both of the targets - <tt>build-arch</tt> and <tt>build-indep</tt>. - The <tt>build-arch</tt> target, if provided, should + The <tt>build-arch</tt> target must perform all the configuration and compilation required for producing all architecture-dependant binary packages (those packages for which the body of the <tt>Architecture</tt> field in <tt>debian/control</tt> is not <tt>all</tt>). Similarly, the <tt>build-indep</tt> - target, if provided, should perform all the configuration + target must perform all the configuration and compilation required for producing all architecture-independent binary packages (those packages for which the body of the <tt>Architecture</tt> field in <tt>debian/control</tt> is <tt>all</tt>). - </p> - - <p> - If <tt>build-arch</tt> or <tt>build-indep</tt> targets are - provided in the rules file, the <tt>build</tt> target + The <tt>build</tt> target should either depend on those targets or take the same actions as invoking those targets would perform.<footnote> - The intent of this split is so that binary-only builds - need not install the dependencies required for - the <tt>build-indep</tt> target. However, this is not - yet used in practice since <tt>dpkg-buildpackage - -B</tt>, and therefore the autobuilders, - invoke <tt>build</tt> rather than <tt>build-arch</tt> - due to the difficulties in determining whether the - optional <tt>build-arch</tt> target exists. + This split allows binary-only builds to not install the + dependencies required for the <tt>build-indep</tt> + target and skip any resource-intensive build tasks that + are only required when building architecture-independent + binary packages. </footnote> </p> <p> - If one or both of the targets <tt>build-arch</tt> and - <tt>build-indep</tt> are not provided, then invoking - <file>debian/rules</file> with one of the not-provided - targets as arguments should produce a exit status code - of 2. Usually this is provided automatically by make - if the target is missing. - </p> - - <p> The <tt>build-arch</tt> and <tt>build-indep</tt> targets must not do anything that might require root privilege. </p>
Seconded. -- Jakub Wilk
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