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[Xen-devel] [PATCH] .S->.o generation should depend on asm-offsets.h

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Subject: [Xen-devel] [PATCH] .S->.o generation should depend on asm-offsets.h
From: "Jan Beulich" <jbeulich@xxxxxxxxxx>
Date: Fri, 02 Mar 2007 10:05:51 +0000
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While object files generated from C sources should generally not depend
on asm-offsets.h, those generated from assembly sources should.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

Index: 2007-02-27/xen/Rules.mk
--- 2007-02-27.orig/xen/Rules.mk        2007-02-28 12:08:24.000000000 +0100
+++ 2007-02-27/xen/Rules.mk     2007-02-21 11:10:08.000000000 +0100
@@ -41,8 +41,8 @@ HDRS += $(wildcard $(BASEDIR)/include/as
 include $(BASEDIR)/arch/$(TARGET_ARCH)/Rules.mk
 # Do not depend on auto-generated header files.
-HDRS := $(subst $(BASEDIR)/include/asm-$(TARGET_ARCH)/asm-offsets.h,,$(HDRS))
-HDRS := $(subst $(BASEDIR)/include/xen/compile.h,,$(HDRS))
+AHDRS := $(filter-out %/include/xen/compile.h,$(HDRS))
+HDRS  := $(filter-out %/asm-offsets.h,$(AHDRS))
 # Note that link order matters!
 ALL_OBJS-y               += $(BASEDIR)/common/built_in.o
@@ -110,12 +110,12 @@ _clean_%/: FORCE
 %.o: %.c $(HDRS) Makefile
        $(CC) $(CFLAGS) -c $< -o $@
-%.o: %.S $(HDRS) Makefile
+%.o: %.S $(AHDRS) Makefile
        $(CC) $(AFLAGS) -c $< -o $@
 %.i: %.c $(HDRS) Makefile
        $(CPP) $(CFLAGS) $< -o $@
 # -std=gnu{89,99} gets confused by # as an end-of-line comment marker
-%.s: %.S $(HDRS) Makefile
+%.s: %.S $(AHDRS) Makefile
        $(CPP) $(AFLAGS) $< -o $@

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