android build take eons

[Imx6dev Kit]

I got my AOSP build to work but it took maybe 8 hours ... i cannot imagine how anyone can develop anything this way .. if i want to include a new library, or write a new driver, or change something minimal, and recompile, isn't there a way to do it quicker?  What is the recommended way to build after making a minor change?

[Glenn Kasten]

The listed build hardware requirements are the bare minimum.

The more RAM and CPUs you have, the better.

And be sure to use make -k to take advantage of all your CPUs.

[Dan Willemsen]

Yep, this greatly depends on your machine and which target you're building -- there are builds and configurations that can do a full clean build in ~30 minutes, but that's a simpler config and a high-end machine.

For the workflow:

if i want to include a new library, or write a new driver, or change something minimal, and recompile, isn't there a way to do it quicker?

You should only need to do the full clean build once, after that incremental builds should be much much shorter (our goals are generally <<1min, but that significantly depends on what you change, and your machine). You should always try to use incremental builds.

And if you know that you only want to rebuild a single partition / don't need images / etc, you can ask for `m vendorimage`/`m sync`/etc, but what works there greatly depends on the types of changes you're making, and what you need out of the build.

 

 And be sure to use make -k to take advantage of all your CPUs.

'-k' is keep going, you're thinking of '-j', but that's been the default for a while now.

- Dan

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