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Diffstat (limited to 'poky/documentation/ref-manual/faq.rst')
| -rw-r--r-- | poky/documentation/ref-manual/faq.rst | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/poky/documentation/ref-manual/faq.rst b/poky/documentation/ref-manual/faq.rst index bab284bbfd..9e3418e10d 100644 --- a/poky/documentation/ref-manual/faq.rst +++ b/poky/documentation/ref-manual/faq.rst @@ -259,6 +259,25 @@ Within the :term:`Build Directory`, is the ``tmp`` directory. To remove all the build output yet preserve any source code or downloaded files from previous builds, simply remove the ``tmp`` directory. +Why isn't there a way to append bbclass files like bbappend for recipes? +------------------------------------------------------------------------ + +The Yocto Project has consciously chosen not to implement such functionality. +Class code is designed to be shared and reused, and exposes some level of +configuration to its users. We want to encourage people to share these changes +so we can build the best classes. + +If the ``append`` functionality was available for classes, our evidence and +experience suggest that people would create their custom changes in their +layer instead of sharing and discussing the issues and/or limitations they +encountered. This would lead to bizarre class interactions when new layers are +included. We therefore consciously choose to have a natural pressure to share +class code improvements or fixes. + +There are also technical considerations like which recipes a class append would +apply to and how that would fit within the layer model. These are complications +we think we can live without! + Customizing generated images ============================ |