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diff --git a/documentation/ref-manual/technical-details.xml b/documentation/ref-manual/technical-details.xml index 260766191a..1b67ca7424 100644 --- a/documentation/ref-manual/technical-details.xml +++ b/documentation/ref-manual/technical-details.xml | |||
@@ -1125,6 +1125,60 @@ | |||
1125 | </itemizedlist> | 1125 | </itemizedlist> |
1126 | </para> | 1126 | </para> |
1127 | </section> | 1127 | </section> |
1128 | |||
1129 | <section id='package-splitting-dev-environment'> | ||
1130 | <title>Package Splitting</title> | ||
1131 | |||
1132 | <para> | ||
1133 | After source code configured and compiled, BitBake analyzes | ||
1134 | the results and splits the output into package: | ||
1135 | <imagedata fileref="figures/analysis-for-package-splitting.png" align="center" width="7in" depth="7in" /> | ||
1136 | </para> | ||
1137 | |||
1138 | <para> | ||
1139 | The <filename>do_package</filename> and | ||
1140 | <filename>do_packagedata</filename> tasks combine to analyze | ||
1141 | the data found in the | ||
1142 | <link linkend='var-D'><filename>D</filename></link> directory | ||
1143 | and split it into subsets based on available packages and | ||
1144 | files. | ||
1145 | The analyzing process involves splitting out debugging symbols, | ||
1146 | looking at shared library dependencies between packages, and | ||
1147 | looking at package relationships. | ||
1148 | The <filename>do_packagedata</filename> task puts package | ||
1149 | metadata based on the analysis such that BitBake can generate | ||
1150 | the final packages. | ||
1151 | Intermediate results of the package analysis and splitting | ||
1152 | end up in the | ||
1153 | <link linkend='var-PKGDEST'><filename>PKGDEST</filename></link> | ||
1154 | directory with the | ||
1155 | <link linkend='var-FILES'><filename>FILES</filename></link> | ||
1156 | variable defining the files that go into the packages. | ||
1157 | If you want some details on how this is accomplished, you can | ||
1158 | look at | ||
1159 | <link linkend='ref-classes-package'><filename>package.bbclass</filename></link>. | ||
1160 | </para> | ||
1161 | |||
1162 | <para> | ||
1163 | Depending on the type of packages being created (RPM, DEB, or | ||
1164 | IPK), the <filename>do_packagewrite_*</filename> task | ||
1165 | creates the actual packages and places them in the | ||
1166 | Package Feed area, which is | ||
1167 | <filename>${TMPDIR}/deploy</filename>. | ||
1168 | You can see the | ||
1169 | "<link linkend='package-feeds-dev-environment'>Package Feeds</link>" | ||
1170 | section for more detail on that part of the build process. | ||
1171 | <note> | ||
1172 | Support for creating feeds directly from the | ||
1173 | <filename>deploy/*</filename> directories does not exist. | ||
1174 | Creating such feeds usually requires some kind of feed | ||
1175 | maintenance mechanism that would upload the new packages | ||
1176 | into an official package feed (e.g. angstrom). | ||
1177 | Providing such a piece for the user is not feasible since | ||
1178 | it is very distribution-specific. | ||
1179 | </note> | ||
1180 | </para> | ||
1181 | </section> | ||
1128 | </section> | 1182 | </section> |
1129 | </section> | 1183 | </section> |
1130 | 1184 | ||