[2024-feb-29] Sad news: Eric Layton aka Nocturnal Slacker aka vtel57 passed away on Feb 26th, shortly after hospitalization. He was one of our Wiki's most prominent admins. He will be missed.

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slackware:package_management_hands_on [2014/02/20 06:16 (UTC)] – Continued french ==> english translation of "Software Management" article kikinovakslackware:package_management_hands_on [2014/02/20 06:33 (UTC)] – kikinovak
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 </code> </code>
 +
 +==== Managing package dependencies ====
 +
 +Some packages require the presence of other packages, either to build (//build dependencies//) and/or to run (//runtime dependencies) correctly. In some cases, a required package can depend itself on one or more other packages, and so on.
 +
 +To take an example, let's have a look at the ''libgnomeprint'' page on SlackBuilds.org. The package description is followed by the following caveat:
 +
 +<code>
 +This requires: libgnomecups.
 +</code>
 +
 +Moreover, every script tarball contains an ''*.info'' file which states explicitly all the required package dependencies. If we look at the ''libgnomeprint.info'' file, we'll find a ''REQUIRES'' field:
 +
 +<code>
 +PRGNAM="libgnomeprint"
 +VERSION="2.18.8"
 +HOMEPAGE="http://www.gnome.org"
 +...
 +REQUIRES="libgnomecups" ----> package dependency
 +...
 +</code>
 +
 +<note>The ''REQUIRES'' field has been introduced with Slackware 14.0.</note>
 +
 +This simply means that before we build the ''libgnomeprint'' package, we have to build and install the ''libgnomecups'' package.
 +
 +Besides strictly required dependencies, a package can also have some optional dependencies to offer some extra functionality. As an example, the Leafpad text editor can be built against the optional ''libgnomeprint'' and ''libgnomeprintui'' dependencies.
  
  

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