We source some scripts, but still pass parameters to them, e.g.

	. mk_version_h $@ $(KERNELRELEASE) $(VERSION) ...

This does not work for all kinds of /bin/sh (it does for bash, that's
why I did not notice).

The fix is easy: Just mark the scripts executable and call instead of
source them.

Unfortunately, patch(1) doesn't understand about propagating chmod.
bk does, so changing the tree isn't hard, and we introduce an explicit
chmod a+x executed during the build for propagating this change into
those trees which get "traditionally" patched up.

Suppress echoing of commands when using "make -s", so that make -s
does indeed have the effect one would expect.

Add a quiet mode, which will print not the entire command but only
one line per rule. To turn it on, use

	make KBUILD_VERBOSE=0 vmlinux/whatever

or set KBUILD_VERBOSE=0 in your environment.

For now, the verbose mode is default, which gives you the old behavior
of printing all commands.

The output in quiet mode is based on what Keith Owens' kbuild-2.5 does,
I like, I did not want to invent yet another output format.

There's no good reason to build the objects in init/ explicitly from
the top-level Makefile. Instead, handle init/ like every other
subdir, which also provides the automatic checks for a changed
command line etc.

init/version.o includes include/linux/compile.h. As compile.h was
regenerated each time make was run, init/version.o was recompiled each
time.

To avoid this, use the following solution: Generate a temporary new
compile.h, and only replace the old one if the new one is different.

We consider the files different if more than just date/time changed, since
otherwise we would have to rebuild every time anyway.

Still, the two files turned out to be different all the time, as we put
a generation number into them which is incremented at each invocation of 
"make". The generation number update is now only done when the kernel
config changes, which makes more sense, anyway.

So, the UTS_VERSION and generation number now relate to the time the 
kernel was configured, not the time the actual "make vmlinux" was run, 
which should be fine.

Also, put the #define UTS_MACHINE ... from the command line into
the header as well.