Build libraries in external folder of AOSP source code

Question

I noticed that a simple

$ . build/envsetup.sh
$ lunch
$ aosp_hammerhead-eng
$ make -j16

Would not build also the external libraries in the ./external folder.

How am I supposed to build source code in such folder?

In particular, I am modifying source code in the libselinux in ./external/selinux/libselinux/src/

Thanks!

Answer 1

I found out that, by using the mm command, it is possible to build all of the modules in the current directory.

So, if you are in ./external/selinux/libselinux/ you can build all code inside such directory just by typing the command mm.

I also found that the same code I was modifying inside the ./external/selinux/libselinux/ is also located in ./external/libselinux/. However, this directory is linked to the make -j16 command.