Ubuntu kernel compilation doesn't reflect changes

[mjimeno]

Hello all,
I compiled a new kernel using the following instructions:
https://help.ubuntu.com/community/Kernel/Compile
From all the options shown there, I downloaded the source using GIT, then compiled the kernel using this:
AUTOBUILD=1 NOEXTRAS=1 fakeroot debian/rules binary=generic (they have a typo there BTW)
It worked fine the first time. It reflected my changes. But then, every time I compile, I don't see the changes reflected. I had to delete all, download a new kernel from GIT, and compile it as if it were the first time and it worked fine again.
I can say I saw two things:
1) before deleting all the files and redoing it again, the compilation took much less time every time I did it. I noticed that compared to a first-time compilation, it looks like it were not doing something.
2) I'm not sure about this, but I saw that the first time it did compile the files, I think because it did a lot of "CC file", which is what takes longer. After the first time, it did only "INSTALL file". Then I didn't see any changes done after the first compilation.
I haven't find a way to make it do all from the beginning.
Any clue why this is happening?
thanks, Miguel

[falko]

Instead of deleting the kernel sources, you can stay in the kernel sources directory and run

make clean && make mrproper

before compiling again.