Add to CPPFLAGS instead of entirely redefining it.
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
zdisk bzdisk fdimage fdimage144 fdimage288 install
ifdef CONFIG_XEN
-CPPFLAGS := -D__KERNEL__ -Iinclude$(if $(KBUILD_SRC),2)/asm/mach-xen $(LINUXINCLUDE)
+CPPFLAGS := -Iinclude$(if $(KBUILD_SRC),2)/asm/mach-xen $(CPPFLAGS)
head-y := arch/i386/kernel/head-xen.o arch/i386/kernel/init_task-xen.o
boot := arch/i386/boot-xen
.PHONY: vmlinuz
fdimage fdimage144 fdimage288 archclean
ifdef CONFIG_XEN
-CPPFLAGS := -D__KERNEL__ -Iinclude$(if $(KBUILD_SRC),2)/asm/mach-xen $(LINUXINCLUDE)
+CPPFLAGS := -Iinclude$(if $(KBUILD_SRC),2)/asm/mach-xen $(CPPFLAGS)
head-y := arch/x86_64/kernel/head-xen.o arch/x86_64/kernel/head64-xen.o arch/x86_64/kernel/init_task.o
LDFLAGS_vmlinux := -e _start
boot := arch/i386/boot-xen