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    Subject[RFC PATCH 02/35] Makefile support to build Xen subarch
    Use arch/i386/mach-xen when building Xen subarch. The separate
    subarchitecture allows us to hide details of interfacing with the
    hypervisor from i386 common code.

    Signed-off-by: Ian Pratt <ian.pratt@xensource.com>
    Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
    Signed-off-by: Chris Wright <chrisw@sous-sol.org>
    ---
    arch/i386/Makefile | 5 +++++
    arch/i386/mach-xen/Makefile | 7 +++++++
    2 files changed, 12 insertions(+)

    --- xen-subarch-2.6.orig/arch/i386/Makefile
    +++ xen-subarch-2.6/arch/i386/Makefile
    @@ -68,6 +68,10 @@ mcore-$(CONFIG_X86_BIGSMP) := mach-defau
    mflags-$(CONFIG_X86_SUMMIT) := -Iinclude/asm-i386/mach-summit
    mcore-$(CONFIG_X86_SUMMIT) := mach-default

    +# Xen subarch support
    +mflags-$(CONFIG_X86_XEN) := -Iinclude/asm-i386/mach-xen
    +mcore-$(CONFIG_X86_XEN) := mach-xen
    +
    # generic subarchitecture
    mflags-$(CONFIG_X86_GENERICARCH) := -Iinclude/asm-i386/mach-generic
    mcore-$(CONFIG_X86_GENERICARCH) := mach-default
    @@ -96,6 +100,7 @@ drivers-$(CONFIG_PM) += arch/i386/powe

    CFLAGS += $(mflags-y)
    AFLAGS += $(mflags-y)
    +CPPFLAGS += $(mflags-y)

    boot := arch/i386/boot

    --- /dev/null
    +++ xen-subarch-2.6/arch/i386/mach-xen/Makefile
    @@ -0,0 +1,7 @@
    +#
    +# Makefile for the linux kernel.
    +#
    +
    +obj-y := setup.o
    +
    +setup-y := ../mach-default/setup.o
    --
    -
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