Difference between revisions of "Bitbake Cheat Sheet"
(Created page with "Here are some quick notes on bitbake syntax and rules. For an exhaustive list of functionality, and longer descriptions, see the bitbake manual at: http://docs.openembedded.org/...") |
|||
| Line 8: | Line 8: | ||
!Meaning | !Meaning | ||
|- | |- | ||
| − | |-c <task>||execute <task> for the image or recipe being built. ex: bitbake -c fetch busybox. | + | | -c <task>||execute <task> for the image or recipe being built. ex: bitbake -c fetch busybox. |
Some of the possible tasks are: fetch, configure, compile, package, clean | Some of the possible tasks are: fetch, configure, compile, package, clean | ||
|- | |- | ||
| − | |-f||force execution of the operation, even if not required | + | | -f||force execution of the operation, even if not required |
|- | |- | ||
| − | |-v||show verbose output | + | | -v||show verbose output |
|- | |- | ||
| − | |-DDD||show lots of debug information | + | | -DDD||show lots of debug information |
|- | |- | ||
| − | |-s||show recipe version information | + | | -s||show recipe version information |
|- | |- | ||
| − | |--help||get usage help | + | | --help||get usage help |
|- | |- | ||
| − | |-c listtasks <image-or-recipe-name>|| show the tasks associated with an image or individual recipe | + | | -c listtasks <image-or-recipe-name>|| show the tasks associated with an image or individual recipe |
|- | |- | ||
|-c clean <recipe>||clean up build artifacts for a recipe | |-c clean <recipe>||clean up build artifacts for a recipe | ||
|- | |- | ||
| − | |-g <recipe>||output dependency tree in graphviz format | + | | -g <recipe>||output dependency tree in graphviz format |
|} | |} | ||
Revision as of 12:40, 30 October 2012
Here are some quick notes on bitbake syntax and rules. For an exhaustive list of functionality, and longer descriptions, see the bitbake manual at: http://docs.openembedded.org/bitbake/html/ (note that this link goes to the OpenEmbedded version of the bitbake manual, which is a version from 2006 as of this writing. A separate (yocto-specific?) bitbake manual is included in source form in the yocto project source directory, under bitbake/doc.)
Options
| Option | Meaning |
|---|---|
| -c <task> | execute <task> for the image or recipe being built. ex: bitbake -c fetch busybox.
Some of the possible tasks are: fetch, configure, compile, package, clean |
| -f | force execution of the operation, even if not required |
| -v | show verbose output |
| -DDD | show lots of debug information |
| -s | show recipe version information |
| --help | get usage help |
| -c listtasks <image-or-recipe-name> | show the tasks associated with an image or individual recipe |
| -g <recipe> | output dependency tree in graphviz format |
Syntax
| Syntax | Meaning | NOTES |
|---|---|---|
| VAR = "foo" | simple assignment | |
| VAR ?= "foo" | assign if no other value is already assigned (default assignment) | |
| VAR ??=foo | weak default assignment | takes lower precedence than ?= |
| VAR = "stuff ${OTHER_VAR} more stuff" | variable expansion | OTHER_VAR expanded at time of reference to VAR |
| VAR := "stuff ${OTHER_VAR} more stuff" | immediate variable expansion | OTHER_VAR expanded at time of parsing this line |
| VAR += "foo" | append with space | |
| VAR =+ "foo" | prepend with space | |
| VAR .= "foo" | append without space | |
| VAR =. "foo" | prepend without space | |
| OVERRIDES="string1:string2" VAR = "foo" |
alternate/override value | if string1 is listed in OVERRIDES, use "bar" for value of VAR, otherwise use "foo" |
