Tablet [Q] build native GNU/Linux apps X11, apache inside android - NO chroot or busybox

Hello all,
Is there a way to build the native android kernel for your device, to include other linux applications?
I would like to build X11 inside of android and use the existing GUI of android.
I'd also like to be able to compile other linux apps isde android as well.

all the searching I have is about linux inside of a chroot, and that's not what i'm looking for.

since android is build upon linux, then really it should only be a matter of runing a few scripts to call init files and other libraries?

I did see this "Build native GNU/Linux applications: the easy way"

But nothings been done since early 2012.

If I'm going to be compiling an android and its kernel for a device from scratch, then it makes sense to extend the linux to include the functionality to build native linux apps as well, right?