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build: sort objects to remove duplicates for link 

Avoid duplicate object files during the link.  There are legitimate
cases where a link command-line would include duplicate object files
because two independent subsystems both depend on common infrastructure.

Use GNU make's $(sort) function to remove duplicate object files from
the link command-line.

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Stefan Hajnoczi 2011-08-25 09:18:52 +01:00 committed by Anthony Liguori
parent 4d88a2ac86
commit e2a99ad3e1
1 changed files with 1 additions and 1 deletions
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2
rules.mak
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@ -31,7 +31,7 @@ endif
%.o: %.m
$(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," OBJC $(TARGET_DIR)$@")
LINK = $(call quiet-command,$(CC) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ $(1) $(LIBS)," LINK $(TARGET_DIR)$@")
LINK = $(call quiet-command,$(CC) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ $(sort $(1)) $(LIBS)," LINK $(TARGET_DIR)$@")
%$(EXESUF): %.o
$(call LINK,$^)