From 020e1c16434162fc3901da47369aec5bb04b286f Mon Sep 17 00:00:00 2001
From: Avi Kivity <avi@redhat.com>
Date: Thu, 30 Oct 2008 12:58:12 +0200
Subject: kvm: external module: dynamic unifdef

The current unifdef solution mangles the source files to fit just one
architecture; this causes problem shipping one source tarball for many
consumers on different architectures.

Change to a dynamic model.  Instead of removing ifdefs, figure out which
symbols are defined on which architecture, and define them appropriately.

Signed-off-by: Avi Kivity <avi@redhat.com>
---
 kvm/kernel/Makefile  |  5 +----
 kvm/kernel/unifdef.h | 28 ++++++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 4 deletions(-)
 create mode 100644 kvm/kernel/unifdef.h

diff --git a/kvm/kernel/Makefile b/kvm/kernel/Makefile
index c905bdaca..aca365e12 100644
--- a/kvm/kernel/Makefile
+++ b/kvm/kernel/Makefile
@@ -25,10 +25,7 @@ _hack = mv $1 $1.orig && \
 	gawk -v version=$(version) -f $(ARCH_DIR)/hack-module.awk $1.orig \
 	    | sed '/\#include/! s/\blapic\b/l_apic/g' > $1 && rm $1.orig
 
-unifdef_uflags = $(foreach arch, $(NONARCH_CONFIG), -UCONFIG_$(arch))
-unifdef = mv $1 $1.orig && \
-	  unifdef -DCONFIG_$(ARCH_CONFIG) $(unifdef_uflags) $1.orig > $1; \
-          [ $$? -le 2 ] && rm $1.orig
+unifdef = mv $1 $1.orig && cat unifdef.h $1.orig > $1 && rm $1.orig
 
 hack = $(call _hack,$T/$(strip $1))
 
diff --git a/kvm/kernel/unifdef.h b/kvm/kernel/unifdef.h
new file mode 100644
index 000000000..ec7744156
--- /dev/null
+++ b/kvm/kernel/unifdef.h
@@ -0,0 +1,28 @@
+#ifndef KVM_UNIFDEF_H
+#define KVM_UNIFDEF_H
+
+#ifdef __i386__
+#ifndef CONFIG_X86_32
+#define CONFIG_X86_32 1
+#endif
+#endif
+
+#ifdef __x86_64__
+#ifndef CONFIG_X86_64
+#define CONFIG_X86_64 1
+#endif
+#endif
+
+#if defined(__i386__) || defined (__x86_64__)
+#ifndef CONFIG_X86
+#define CONFIG_X86 1
+#endif
+#endif
+
+#ifdef __ia64__
+#ifndef CONFIG_IA64
+#define CONFIG_IA64 1
+#endif
+#endif
+
+#endif
-- 
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