Merge pull request #433 from spartacus06/fixup-makefile

improve kpatch-build Makefile

.gitignore

@@ -5,6 +5,7 @@
 *.ko.cmd
 *.mod.c
 *.swp
+*.d
 .tmp_versions
 Module.symvers
 kpatch-build/lookup

kpatch-build/Makefile

@@ -4,13 +4,18 @@ CFLAGS  += -I../kmod/patch -Iinsn -Wall -g
 LDFLAGS = -lelf
 
 TARGETS = create-diff-object
+OBJS = create-diff-object.o lookup.o insn/insn.o insn/inat.o
+SOURCES = create-diff-object.c lookup.c insn/insn.c insn/inat.c
 
 all: $(TARGETS)
 
-create-diff-object: create-diff-object.c list.h lookup.c lookup.h insn/insn.c \
-		    insn/inat.c insn/inat-tables.c insn/asm/inat.h \
-		    insn/asm/insn.h insn/asm/inat_types.h
-	$(CC) $(CFLAGS) create-diff-object.c lookup.c insn/insn.c insn/inat.c -o $@ $(LDFLAGS)
+-include $(SOURCES:.c=.d)
+
+%.o : %.c
+	$(CC) -MMD -MP $(CFLAGS) -c -o $@ $<
+
+create-diff-object: $(OBJS)
+	$(CC) $(CFLAGS) $^ -o $@ $(LDFLAGS)
 
 install: all
 	$(INSTALL) -d $(LIBEXECDIR)
@@ -23,4 +28,4 @@ uninstall:
 	$(RM) $(BINDIR)/kpatch-build
 
 clean:
-	$(RM) $(TARGETS)
+	$(RM) $(TARGETS) $(OBJS) *.d insn/*.d