The output directory can also be specificed using "O=...".
Setting "O=..." takes precedence over KBUILD_OUTPUT.
+KBUILD_DEBARCH
+--------------------------------------------------
+For the deb-pkg target, allows overriding the normal heuristics deployed by
+deb-pkg. Normally deb-pkg attempts to guess the right architecture based on
+the UTS_MACHINE variable, and on some architectures also the kernel config.
+The value of KBUILD_DEBARCH is assumed (not checked) to be a valid Debian
+architecture.
+
ARCH
--------------------------------------------------
Set ARCH to the architecture to be built.
Specify an optional fixed part of the binutils filename.
CROSS_COMPILE can be a part of the filename or the full path.
-CROSS_COMPILE is also used for ccache is some setups.
+CROSS_COMPILE is also used for ccache in some setups.
CF
--------------------------------------------------
to be included in the databases, separated by blank space. E.g.:
$ make ALLSOURCE_ARCHS="x86 mips arm" tags
+
+To get all available archs you can also specify all. E.g.:
+
+ $ make ALLSOURCE_ARCHS=all tags