How to do an android mm clean?
Another way to do without mm is to give make clean-<target name> from root of Android source.
Similarly you can build the required module alone with make <target name>
On older make-based AOSP build system, use
mm -Bto rebuild the module.
On newer Ninja+Soong based AOSP build systems, it seems that -B no longer works. It gives the error Unknown option: -B.
One possible alternative is to use the NINJA_ARGS environment variable to pass additional Ninja arguments to underlying build engine.
For example, the following command removes all output and intermediate files:
NINJA_ARGS="-t clean" mmIn this case clean is an extra tool to the Ninja build system. See https://ninja-build.org/manual.html#_extra_tools for other tools.
One thing to notice is that the clean tool seems to clear all the dependencies of the module, instead of the module itself. I haven't found a way to assign a rule to limit the clean scope to the module only.
references: https://android.googlesource.com/platform/build/soong/+/HEAD/docs/best_practices.md