bitbake:如何根据MACHINE添加软件包? [英] bitbake: how to add package depending on MACHINE?

问题描述

使用bitbake构建的映像必须包含用于不同计算机的不同程序包(例如，对于machine1，我需要将程序包package1添加到映像中，而对于machine2，则不需要).

My images, built with bitbake, must contain different packages for different machines (say, I need to add package package1 to image for machine1, but not for machine2).

可以添加行

IMAGE_INSTALL_append_machine1 = " package1"

到图像配方.但是我认为这是不可持续的，因为IMAGE_INSTALL_append_machine1可能在其他配方中定义(不受我的控制)，并且较早的定义会被较新的定义覆盖.这就是我认为Yocto Project Development手册警告的内容使用IMAGE_INSTALL .

to the image recipe. But I do not think this is sustainable, as IMAGE_INSTALL_append_machine1 may be defined in some other recipe (which is not under my control) and the earlier definition gets overwritten with the later one. This is what I think Yocto Project Development manual warns about using IMAGE_INSTALL.

我的担忧有效吗?在这种情况下，写食谱的正确方法是什么?

Is my concern valid? What is the proper way to write the recipe(s) in this case?

推荐答案

我相信您要查找的功能是base_contains

I believe the function you are looking for is base_contains

此函数用于根据以下参数将变量设置为两个值之一 第三个变量的定义.

This functions is used to set a variable to one of two values based on the definition of a third variable.

${@base_contains('variable-name', 'value', 'true-result', 'false-result',d)}"其中:

variable-name这是要检查的变量的名称.

variable-name This is the name of a variable to check.

value这是将变量与之进行比较的值.

value This is the value to compare the variable against.

true-result如果变量等于值，那么这就是 由该函数返回.

true-result If the variable equals the value then this is what is returned by the function.

false-result如果变量不等于值，则为 函数返回什么.

false-result If the variable does not equal the value then this is what is returned by the function.

还有一件事情，您可以使用??=提供默认值. ?=和??=之间的区别在于，使用??=分配直到解析过程结束才发生.

One more thing, you could use ??= to provide a default value. The differences between ?= and ??= is that with ??= the assignment does not occur until the end of the parsing process.

您可以查看以下示例之一此处用于图像配方

You could take a look at one of the example here for image recipe

http://www.embeddedlinux.org.cn/OEManual/recipes_advanced_python.html

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