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Diffstat (limited to 'bitbake/doc/bitbake-user-manual/bitbake-user-manual-metadata.xml')
| -rw-r--r-- | bitbake/doc/bitbake-user-manual/bitbake-user-manual-metadata.xml | 35 |
1 files changed, 26 insertions, 9 deletions
diff --git a/bitbake/doc/bitbake-user-manual/bitbake-user-manual-metadata.xml b/bitbake/doc/bitbake-user-manual/bitbake-user-manual-metadata.xml index 26fe58f84c..646f6744e6 100644 --- a/bitbake/doc/bitbake-user-manual/bitbake-user-manual-metadata.xml +++ b/bitbake/doc/bitbake-user-manual/bitbake-user-manual-metadata.xml @@ -1624,15 +1624,32 @@ <title>Dependencies</title> <para> - To allow for efficient operation given multiple processes - executing in parallel, BitBake handles dependencies at - the task level. - BitBake supports a robust method to handle these dependencies. - </para> - - <para> - This section describes several types of dependency mechanisms. - </para> + To allow for efficient parallel processing, BitBake handles + dependencies at the task level. + Dependencies can exist both between tasks within a single recipe + and between tasks in different recipes. + Following are examples of each: + <itemizedlist> + <listitem><para>For tasks within a single recipe, a + recipe's <filename>do_configure</filename> + task might need to complete before its + <filename>do_compile</filename> task can run. + </para></listitem> + <listitem><para>For tasks in different recipes, one + recipe's <filename>do_configure</filename> + task might require another recipe's + <filename>do_populate_sysroot</filename> + task to finish first such that the libraries and headers + provided by the other recipe are available. + </para></listitem> + </itemizedlist> + </para> + + <para> + This section describes several ways to declare dependencies. + Remember, even though dependencies are declared in different ways, they + are all simply dependencies between tasks. + </para> <section id='dependencies-internal-to-the-bb-file'> <title>Dependencies Internal to the <filename>.bb</filename> File</title> |