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在 BitBake 中，clean 和 cleanall 命令都用于删除构建工件，但它们的范围和执行的清理程度不同。

1. clean 命令：

• 目的：clean命令用于删除与特定任务或配方相关的临时构建文件和工件。

• 范围：它只清除指定任务或配方生成的文件，而不清除任何可在后续构建中重复使用的共享或缓存文件。

• 使用方法：要针对特定的配方或任务执行 clean 命令，需要在 BitBake 中使用-c 选项，并在后面跟上任务名称。

  例如

  bitbake -c clean <recipe>
  

• 示例：如果运行 bitbake -c clean core-image-minimal，它将只清理与 core-image-minimal 配方相关的构建工件，如根文件系统镜像、包文件和任何中间构建文件。

2. cleanall 命令：

• 目的：与 clean 命令相比，cleanall 命令更激进、更全面。它会删除与特定配方相关的所有临时构建文件和人工制品，包括共享或缓存文件。

• 范围：清理指定配方生成的所有文件，包括中间文件、共享对象文件、缓存文件和其他任何构建工件。

• 用法：与 clean 命令类似，在 BitBake 中使用 -c 选项，然后是 cleanall 和配方名称。

  例如:

  bitbake -c cleanall <recipe>
  

• 示例：如果运行 bitbake -c cleanall core-image-minimal，它不仅会清除 core-image-minimal 配方的构建工件，还会删除与该配方相关的任何缓存文件或共享资源，确保重建时完全干净。

摘要：

• clean:

  • 删除指定配方或任务的临时构建文件和工件。
  • 留下可在后续构建中重复使用的共享或缓存文件。
  • 用于在不影响共享资源的情况下快速清理特定任务或配方。

• cleanall:

  • 删除与指定配方相关的所有临时构建文件和工件。
  • 清理共享或缓存文件以及特定配方文件，确保重建环境完全干净。
  • 这对于强制从头开始全面重建非常有用，尤其是当缓存或共享资源出现问题时。

In BitBake, both the clean and cleanall commands are used to remove build artifacts, but they differ in their scope and the extent of cleaning they perform.

1. clean Command:

• Purpose: The clean command is used to remove temporary build files and artifacts associated with a specific task or recipe.

• Scope: It cleans only the files generated by the specified task or recipe, leaving behind any shared or cached files that can be reused in subsequent builds.

• Usage: To execute the clean command for a specific recipe or task, you use the -c option with BitBake, followed by the task name.

  Example:

  bitbake -c clean <recipe>
  

• Example: If you run bitbake -c clean core-image-minimal, it will clean only the build artifacts specific to the core-image-minimal recipe, such as the root filesystem image, package files, and any intermediate build files.

2. cleanall Command:

• Purpose: The cleanall command is more aggressive and comprehensive compared to clean. It removes all temporary build files and artifacts associated with a specific recipe, including shared or cached files.

• Scope: It cleans all files generated by the specified recipe, including intermediate files, shared object files, cached files, and any other build artifacts.

• Usage: Similar to the clean command, you use the -c option with BitBake, followed by cleanall and the recipe name.

  Example:

  bitbake -c cleanall <recipe>
  

• Example: If you run bitbake -c cleanall core-image-minimal, it will not only clean the build artifacts specific to the core-image-minimal recipe but also remove any cached files or shared resources associated with the recipe, ensuring a completely clean slate for a rebuild.

Summary:

• clean:

  • Removes temporary build files and artifacts specific to the specified recipe or task.
  • Leaves behind shared or cached files that can be reused in subsequent builds.
  • Useful for quickly cleaning up after a specific task or recipe without affecting shared resources.

• cleanall:

  • Removes all temporary build files and artifacts associated with the specified recipe.
  • Cleans shared or cached files along with recipe-specific files, ensuring a completely clean environment for a rebuild.
  • Useful for forcing a full rebuild from scratch, particularly if there are issues related to cached or shared resources.